Publications

@article{nokey,

title = {Ion Dynamics and Polymorphism in Cu20Te11Cl3},

author = {A Vogel and T Nilges},

url = {https://doi.org/10.1021/acs.inorgchem.1c01764},

doi = {10.1021/acs.inorgchem.1c01764},

issn = {0020-1669},

year  = {2021},

date = {2021-10-04},

journal = {Inorganic Chemistry},

volume = {60},

number = {20},

pages = {15233-15241},

abstract = {Coinage metal polychalcogenide halides are an intriguing class of materials, and many representatives are solid ion conductors and thermoelectric materials. The materials show high ion mobility, polymorphism, and various attractive interactions in the cation and anion substructures. Especially the latter feature leads to complex electronic structures and the occurrence of charge-density waves (CDWs) and, as a result, the first p\textendashn\textendashp switching materials. During our systematic investigations for new p\textendashn\textendashn switching materials in the Cu\textendashTe\textendashCl phase diagram, we were able to isolate polymorphic Cu20Te11Cl3, which we characterized structurally and with regard to its electronic and thermoelectric properties. Cu20Te11Cl3 is trimorphic, with phase transitions occurring at 288 and 450 K. The crystal structures of two polymorphs, the α phase, stable above 450 K, and the β polymorph (288\textendash450 K), are reported, and the complex structure chemistry featuring twinning upon a phase change is illustrated. We identified a dynamic cation substructure and a static anion substructure for all polymorphs, characterizing Cu20Te11Cl3 as a solid Cu-ion conductor. Temperature-dependent measurements of the Seebeck coefficient and total conductivity were performed and substantiated a linear response of the Seebeck coefficient, a lack of CDWs, and no p\textendashn\textendashp switching. Reasons for a lack of CDWs in Cu20Te11Cl3 are discussed and illustrated in the context of existing p\textendashn\textendashp switching materials.},

keywords = {Foundry Inorganic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Degradation mechanisms of perovskite solar cells under vacuum and one atmosphere of nitrogen},

author = {R Guo and D Han and W Chen and L Dai and K Ji and Q Xiong and S Li and L K Reb and M A Scheel and S Pratap and N Li and S Yin and T Xiao and S Liang and A L Oechsle and C L Weindl and M Schwartzkopf and H Ebert and P Gao and K Wang and M Yuan and N C Greenham and S D Stranks and S V Roth and R H Friend and P M\"{u}ller-Buschbaum},

url = {https://doi.org/10.1038/s41560-021-00912-8},

doi = {10.1038/s41560-021-00912-8},

issn = {2058-7546},

year  = {2021},

date = {2021-10-01},

urldate = {2021-10-01},

journal = {Nature Energy},

volume = {6},

number = {10},

pages = {977-986},

abstract = {Extensive studies have focused on improving the operational stability of perovskite solar cells, but few have surveyed the fundamental degradation mechanisms. One aspect overlooked in earlier works is the effect of the atmosphere on device performance during operation. Here we investigate the degradation mechanisms of perovskite solar cells operated under vacuum and under a nitrogen atmosphere using synchrotron radiation-based operando grazing-incidence X-ray scattering methods. Unlike the observations described in previous reports, we find that light-induced phase segregation, lattice shrinkage and morphology deformation occur under vacuum. Under nitrogen, only lattice shrinkage appears during the operation of solar cells, resulting in better device stability. The different behaviour under nitrogen is attributed to a larger energy barrier for lattice distortion and phase segregation. Finally, we find that the migration of excessive PbI2 to the interface between the perovskite and the hole transport layer degrades the performance of devices under vacuum or under nitrogen.},

keywords = {Foundry Inorganic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {The Effect of Photoinduced Surface Oxygen Vacancies on the Charge Carrier Dynamics in TiO2 Films},

author = {O E Dagdeviren and D Glass and R Sapienza and E Cort\'{e}s and S A Maier and I P Parkin and P Gr\"{u}tter and R Quesada-Cabrera},

url = {https://doi.org/10.1021/acs.nanolett.1c02853},

doi = {10.1021/acs.nanolett.1c02853},

issn = {1530-6984},

year  = {2021},

date = {2021-09-28},

journal = {Nano Letters},

volume = {21},

number = {19},

pages = {8348-8354},

abstract = {Metal-oxide semiconductors (MOS) are widely utilized for catalytic and photocatalytic applications in which the dynamics of charged carriers (e.g., electrons, holes) play important roles. Under operation conditions, photoinduced surface oxygen vacancies (PI-SOV) can greatly impact the dynamics of charge carriers. However, current knowledge regarding the effect of PI-SOV on the dynamics of hole migration in MOS films, such as titanium dioxide, is solely based upon volume-averaged measurements and/or vacuum conditions. This limits the basic understanding of hole-vacancy interactions, as they are not capable of revealing time-resolved variations during operation. Here, we measured the effect of PI-SOV on the dynamics of hole migration using time-resolved atomic force microscopy. Our findings demonstrate that the time constant associated with hole migration is strongly affected by PI-SOV, in a reversible manner. These results will nucleate an insightful understanding of the physics of hole dynamics and thus enable emerging technologies, facilitated by engineering hole-vacancy interactions.},

keywords = {Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Real-time observation of nucleation and growth of Au on CdSe quantum dot templates},

author = {N Paul and J Huang and C Liu and T Lin and C Ouyang and Z Liu and C Chen and Z Chen and Z Weng and M Schwartzkopf and S V Roth and P M\"{u}ller-Buschbaum and A Paul},

url = {https://doi.org/10.1038/s41598-021-97485-z},

doi = {10.1038/s41598-021-97485-z},

issn = {2045-2322},

year  = {2021},

date = {2021-09-21},

journal = {Scientific Reports},

volume = {11},

number = {1},

pages = {18777},

abstract = {Semiconductor quantum dot (QD) arrays can be useful for optical devices such as lasers, solar cells and light-emitting diodes. As the size distribution influences the band-gap, it is worthwhile to investigate QDs prepared using different solvents because each of them could influence the overall morphology differently, depending on the ligand network around individual QDs. Here, we follow the nucleation and growth of gold (Au) on CdSe QD arrays to investigate the influence of surface ligands and thereby realized interparticle distance between QDs on Au growth behaviour. We particularly emphasize on the monolayer stage as the Au decoration on individual QDs is expected at this stage. Therefore, we sputter-deposit Au on each QD array to investigate the morphological evolution in real-time using time-resolved grazing-incidence small-angle X-ray scattering (GISAXS). The growth kinetics - independent of the template - signifies that the observed template-mediated nucleation is limited only to the very first few monolayers. Delicate changes in the Au growth morphology are seen in the immediate steps following the initial replicated decoration of the QD arrays. This is followed by a subsequent clustering and finally a complete Au coverage of the QD arrays.},

keywords = {Foundry Inorganic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Non-Local Exciton-Photon Interactions in Hybrid High-Q Nanocavities with Embedded hBN-Encapsulated MoS2 Monolayers},

author = {C Qian and V Villafa\~{n}e and P Soubelet and A H\"{o}tger and T Taniguchi and K Watanabe and N P Wilson and A V Stier and A W Holleitner and J J Finley},

url = {https://arxiv.org/abs/2107.04387},

doi = {arXiv:2107.04387v2},

year  = {2021},

date = {2021-09-20},

journal = {arXiv preprint arXiv:2107.04387},

abstract = {Atomically thin semiconductors can be readily integrated into a wide range of nanophotonic architectures for applications in quantum photonics and novel optoelectronic devices. We report the observation of non-local interactions of textitfree trions in pristine hBN/MoS2/hBN heterostructures coupled to single mode (Q >104) quasi 0D nanocavities. The high excitonic and photonic quality of the interaction system stem from our integrated nanofabrication approach simultaneously with the hBN encapsulation and the maximized local cavity field amplitude within the MoS2 monolayer. We observe a non-monotonic temperature dependence of the cavity-trion interaction strength, consistent with the non-local light-matter interactions in which the free trion diffuse over lengthscales comparable to the cavity mode volume. Our approach can be generalized to other optically active 2D materials, opening the way towards harnessing novel light-matter interaction regimes for applications in quantum photonics.},

keywords = {Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Acoustic Coupling between Plasmonic Nanoantennas: Detection and Directionality of Surface Acoustic Waves},

author = {M Poblet and R Bert\'{e} and H D Boggiano and Y Li and E Cort\'{e}s and G Grinblat and S A Maier and A V Bragas},

url = {https://doi.org/10.1021/acsphotonics.1c00741},

doi = {10.1021/acsphotonics.1c00741},

year  = {2021},

date = {2021-09-17},

urldate = {2021-09-17},

journal = {ACS Photonics},

abstract = {Hypersound waves can be efficient mediators between optical signals at the nanoscale. Having phase velocities several orders of magnitude lower than the speed of light, they propagate with much shorter wavelengths and can be controlled, directed, and even focused in a very small region of space. This work shows how two optical nanoantennas can be coupled through an acoustic wave that propagates with a certain directionality. An “emitter” antenna is first optically excited to generate acoustic coherent phonons that launch surface acoustic waves through the underlying substrate. These waves travel until they are mechanically detected by a “receiver” nanoantenna whose oscillation produces a detectable optical signal. Generation and detection are studied in detail, and new designs are proposed to improve the directionality of the hypersonic surface acoustic wave.},

keywords = {Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Multistate Nonvolatile Metamirrors with Tunable Optical Chirality},

author = {Y Huang and T Xiao and Z Xie and J Zheng and Y Su and W Chen and K Liu and M Tang and J Zhu and P M\"{u}ller-Buschbaum and L Li},

url = {https://doi.org/10.1021/acsami.1c14204},

doi = {10.1021/acsami.1c14204},

issn = {1944-8244},

year  = {2021},

date = {2021-09-14},

urldate = {2021-09-14},

journal = {ACS Applied Materials \& Interfaces},

abstract = {Compared with conventional mirrors that behave as isotropic electromagnetic (EM) reflectors, metamirrors composed of periodically aligned artificial meta-atoms exhibit increased degrees of freedom for EM manipulations. However, the functionality of most metamirrors is fixed by design, and how to achieve active EM control is still elusive. Here, we propose a multistate metamirror based on the nonvolatile phase change material Ge2Sb2Te5 (GST) with four distinct functionalities that can be realized in the infrared region by exploiting the temperature-activated phase transition. When varying the crystallinity of GST, the metamirror has the capability to perform as a right-handed circular polarization chiral mirror, a narrowband achiral mirror, a left-handed circular polarization chiral mirror, or a broadband achiral mirror, respectively. The inner physics is further explained by the construction or cancellation of extrinsic two-dimensional chirality. As a proof of concept, experimental verification is carried out and the measured results agree well with their simulated counterparts. Such a multifunctional tunable metamirror could address a wide range of applications from sensing and spectroscopy to analytical chemistry and imaging.},

keywords = {Foundry Inorganic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Trions in MoS2 are quantum superpositions of intra-and intervalley spin states},

author = {J Klein and M Florian and A H\"{o}tger and A Steinhoff and A Delhomme and T Taniguchi and K Watanabe and F Jahnke and A W Holleitner and M Potemski},

url = {https://arxiv.org/abs/2109.06281},

doi = {arXiv:2109.06281v1},

year  = {2021},

date = {2021-09-13},

journal = {arXiv preprint arXiv:2109.06281},

abstract = {We report magneto-photoluminescence spectroscopy of gated MoS2 monolayers in high magnetic fields to 28 T. At B = 0T and electron density ns∼1012cm−2, we observe three trion resonances that cannot be explained within a single-particle picture. Employing ab initio calculations that take into account three-particle correlation effects as well as local and non-local electron-hole exchange interaction, we identify those features as quantum superpositions of inter- and intravalley spin states. We experimentally investigate the mixed character of the trion wave function via the filling factor dependent valley Zeeman shift in positive and negative magnetic fields. Our results highlight the importance of exchange interactions for exciton physics in monolayer MoS2 and provide new insights into the microscopic understanding of trion physics in 2D multi-valley semiconductors for low excess carrier densities.},

keywords = {Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Single-step-fabricated disordered metasurfaces for enhanced light extraction from LEDs},

author = {P Mao and C Liu and X Li and M Liu and Q Chen and M Han and S A Maier and E H Sargent and S Zhang},

url = {https://doi.org/10.1038/s41377-021-00621-7},

doi = {10.1038/s41377-021-00621-7},

issn = {2047-7538},

year  = {2021},

date = {2021-09-06},

journal = {Light: Science \& Applications},

volume = {10},

number = {1},

pages = {180},

abstract = {While total internal reflection (TIR) lays the foundation for many important applications, foremost fibre optics that revolutionised information technologies, it is undesirable in some other applications such as light-emitting diodes (LEDs), which are a backbone for energy-efficient light sources. In the case of LEDs, TIR prevents photons from escaping the constituent high-index materials. Advances in material science have led to good efficiencies in generating photons from electron\textendashhole pairs, making light extraction the bottleneck of the overall efficiency of LEDs. In recent years, the extraction efficiency has been improved, using nanostructures at the semiconductor/air interface that outcouple trapped photons to the outside continuum. However, the design of geometrical features for light extraction with sizes comparable to or smaller than the optical wavelength always requires sophisticated and time-consuming fabrication, which causes a gap between lab demonstration and industrial-level applications. Inspired by lightning bugs, we propose and realise a disordered metasurface for light extraction throughout the visible spectrum, achieved with single-step fabrication. By applying such a cost-effective light extraction layer, we improve the external quantum efficiency by a factor of 1.65 for commercialised GaN LEDs, demonstrating a substantial potential for global energy-saving and sustainability.},

keywords = {Foundry Inorganic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Self-induced ultrafast electron-hole plasma temperature oscillations in nanowire lasers},

author = {A Thurn and J Bissinger and S Meinecke and P Schmiedeke and S S Oh and W W Chow and K L\"{u}dge and G Koblm\"{u}ller and J J Finley},

url = {https://arxiv.org/abs/2108.11784},

doi = {arXiv:2108.11784v2},

year  = {2021},

date = {2021-09-06},

journal = {arXiv preprint arXiv:2108.11784},

abstract = {Nanowire lasers can be monolithically and site-selectively integrated onto silicon photonic circuits. To assess their full potential for ultrafast opto-electronic devices, a detailed understanding of their lasing dynamics is crucial. However, the roles played by their resonator geometry and the microscopic processes that mediate energy exchange between the photonic, electronic, and phononic systems are largely unexplored. Here, we apply femtosecond pump-probe spectroscopy to show that GaAs-AlGaAs core-shell nanowire lasers exhibit sustained intensity oscillations with frequencies ranging from 160 GHz to 260 GHz. These dynamics are intricately linked to the strong interaction between the lasing mode and the gain material arising from their wavelength-scale dimensions. Combined with dynamic competition between photoinduced carrier heating and cooling via phonon scattering, this enables self-induced electron-hole plasma temperature oscillations, which modulate the laser output. We anticipate that our results will lead to new approaches for ultrafast intensity and phase modulation of chip-integrated nanoscale semiconductor lasers.},

keywords = {Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Overcoming the Challenges of Freestanding Tin Oxide-Based Composite Anodes to Achieve High Capacity and Increased Cycling Stability},

author = {F Zoller and S H\"{a}ringer and D B\"{o}hm and H Illner and M D\"{o}blinger and Z K Sofer and M Finsterbusch and T Bein and D Fattakhova-Rohlfing},

url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/adfm.202106373},

doi = {https://doi.org/10.1002/adfm.202106373},

issn = {1616-301X},

year  = {2021},

date = {2021-08-27},

journal = {Advanced Functional Materials},

volume = {31},

number = {43},

pages = {2106373},

abstract = {Abstract Freestanding electrodes are a promising way to increase the energy density of the batteries by decreasing the overall amount of electrochemically inactive materials. Freestanding antimony doped tin oxide (ATO)-based hybrid materials have not been reported so far, although this material has demonstrated excellent performance in conventionally designed electrodes. Two different strategies, namely electrospinning and freeze-casting, are explored for the fabrication of ATO-based hybrid materials. It is shown that the electrospinning of ATO/carbon based electrodes from polyvinyl pyrrolidone polymer (PVP) solutions was not successful, as the resulting electrode material suffers from rapid degradation. However, freestanding reduced graphene oxide (rGO) containing ATO/C/rGO nanocomposites prepared via a freeze-casting route demonstrates an impressive rate and cycling performance reaching 697 mAh g−1 at a high current density of 4 A g−1, which is 40 times higher as compared to SnO2/rGO and also exceeds the freestanding SnO2-based composites reported so far. Antimony doping of the nanosized tin oxide phase and carbon coating are thereby shown to be essential factors for appealing electrochemical performance. Finally, the freestanding ATO/C/rGO anodes are combined with freestanding LiFe0.2Mn0.8PO4/rGO cathodes to obtain a full freestanding cell operating without metal current collector foils showing nonetheless an excellent cycling stability.},

keywords = {Foundry Inorganic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Influence of environmental conditions and surface treatments on the photoluminescence properties of GaN nanowires and nanofins},

author = {M Kraut and F Pantle and S W\"{o}rle and E Sirotti and A Zeidler and F Eckmann and M Stutzmann},

issn = {0957-4484},

year  = {2021},

date = {2021-08-16},

journal = {Nanotechnology},

keywords = {Foundry Inorganic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Ultra‐Thin Protective Coatings for Sustained Photoelectrochemical Water Oxidation with Mo: BiVO4},

author = {M Beetz and S H\"{a}ringer and P Els\"{a}sser and J Kampmann and L Sauerland and F Wolf and M G\"{u}nther and A Fischer and T Bein},

url = {https://doi.org/10.1002/adfm.202011210},

issn = {1616-301X},

year  = {2021},

date = {2021-08-12},

urldate = {2021-08-12},

journal = {Advanced Functional Materials},

pages = {2011210},

keywords = {Foundry Inorganic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{,

title = {Polaron-Assisted Charge Transport in Li-Ion Battery Anode Materials},

author = {M Kick and C Scheurer and H Oberhofer},

url = {https://doi.org/10.1021/acsaem.1c01767},

doi = {10.1021/acsaem.1c01767},

year  = {2021},

date = {2021-08-04},

journal = {ACS Applied Energy Materials},

abstract = {Lithium-ion batteries are without a doubt a key technology in the coming energy revolution. It is thus all the more surprising that one of the more prevalent Li battery anode materials, reduced lithium titanium oxide (LTO, Li4Ti5O12), is still poorly understood on a microscopic level. While recent theoretical and experimental evidence suggests that a polaron hopping mechanism is responsible for the increased electronic conductivity of reduced LTO, no such explanation exists for the concurrent improvements to the ionic mobility. In this computational study, we show that the presence of polaronic Ti3+ centers can indeed lead to a significant lowering of Li hopping barriers in both bulk and surface reduced LTO. For the latter, we find a reduced barrier height of roughly 40 meV compared to that of our pristine reference. This is in accordance with experimental findings showing that lithium-ion diffusion in reduced LTO is twice as high as that for pristine LTO. Finally, we show that\textemdashin accordance with experimental observations\textemdashpolaron formation upon lithiation of LTO leads to a similar behavior. Altogether, our analysis hints at a correlated movement of Li ions and polarons, highlighting LTO’s potential for rational defect engineering.},

keywords = {Foundry Inorganic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{,

title = {Design of High-Performance Lead-Free Quaternary Antiperovskites for Photovoltaics via Ion Type Inversion and Anion Ordering},

author = {D Han and C Feng and M-H Du and T Zhang and S Wang and G Tang and T Bein and H Ebert},

url = {https://doi.org/10.1021/jacs.1c06403},

doi = {10.1021/jacs.1c06403},

issn = {0002-7863},

year  = {2021},

date = {2021-08-02},

urldate = {2021-08-02},

journal = {Journal of the American Chemical Society},

volume = {143},

number = {31},

pages = {12369-12379},

abstract = {The emergence of halide double perovskites significantly increases the compositional space for lead-free and air-stable photovoltaic absorbers compared to halide perovskites. Nevertheless, most halide double perovskites exhibit oversized band gaps (>1.9 eV) or dipole-forbidden optical transition, which are unfavorable for efficient single-junction solar cell applications. The current device performance of halide double perovskite is still inferior to that of lead-based halide perovskites, such as CH3NH3PbI3 (MAPbI3). Here, by ion type inversion and anion ordering on perovskite lattice sites, two new classes of pnictogen-based quaternary antiperovskites with the formula of X6B2AA′ and X6BB′A2 are designed. Phase stability and tunable band gaps in these quaternary antiperovskites are demonstrated based on first-principles calculations. Further photovoltaic-functionality-directed screening of these materials leads to the discovery of 5 stable compounds (Ca6N2AsSb, Ca6N2PSb, Sr6N2AsSb, Sr6N2PSb, and Ca6NPSb2) with suitable direct band gaps, small carrier effective masses and low exciton binding energies, and dipole-allowed strong optical absorption, which are favorable properties for a photovoltaic absorber material. The calculated theoretical maximum solar cell efficiencies based on these five compounds are all larger than 29%, comparable to or even higher than that of the MAPbI3 based solar cell. Our work reveals the huge potential of quaternary antiperovskites in the optoelectronic field and provides a new strategy to design lead-free and air-stable perovskite-based photovoltaic absorber materials.},

keywords = {Foundry Inorganic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{,

title = {Temperature dependences of the double layer capacitance of some solid/liquid and solid/solid electrified interfaces. An experimental study},

author = {S A Watzele and L Katzenmeier and J P Sabawa and B Garlyyev and A S Bandarenka},

url = {https://www.sciencedirect.com/science/article/pii/S0013468621012597},

doi = {https://doi.org/10.1016/j.electacta.2021.138969},

issn = {0013-4686},

year  = {2021},

date = {2021-07-30},

journal = {Electrochimica Acta},

volume = {391},

pages = {138969},

abstract = {This study investigates the influence of the temperature on the electrical double layer capacitance (CDL) of various materials, which are essential for fuel cells and solid-state Li-ion batteries. Electrochemical impedance spectroscopy is utilized to measure the CDL of polycrystalline Pt/aqueous electrolytes interfaces, cathode catalyst layers of polymer electrolyte membrane fuel cells (PEMFC), and Au or Li electrodes in contact with a solid-state electrolyte (SSE), a prime example for solid-state ionics. Our results show that within the investigated temperature ranges, the CDL decreases with an increase in the temperature for Pt electrodes in an aqueous acidic electrolyte. However, for SSE and PEMFC cathode catalyst layers, the CDL increases with temperature. The CDL behavior with the temperature of herein presented systems is important for understanding and modeling of the interface processes for renewable energy conversion systems such as fuel cells, water electrolyzers, and batteries.},

keywords = {Foundry Inorganic, Solid-Liquid, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{,

title = {Ultrafast Photoconductivity and Terahertz Vibrational Dynamics in Double-Helix SnIP Nanowires},

author = {D N Purschke and M R P Pielmeier and E \"{U}zer and C Ott and C Jensen and A Degg and A Vogel and N Amer and T Nilges and F A Hegmann},

url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.202100978},

doi = {https://doi.org/10.1002/adma.202100978},

issn = {0935-9648},

year  = {2021},

date = {2021-07-19},

journal = {Advanced Materials},

volume = {n/a},

number = {n/a},

pages = {2100978},

abstract = {Abstract Tin iodide phosphide (SnIP), an inorganic double-helix material, is a quasi-1D van der Waals semiconductor that shows promise in photocatalysis and flexible electronics. However, the understanding of the fundamental photophysics and charge transport dynamics of this new material is limited. Here, time-resolved terahertz (THz) spectroscopy is used to probe the transient photoconductivity of SnIP nanowire films and measure the carrier mobility. With insight into the highly anisotropic electronic structure from quantum chemical calculations, an electron mobility as high as 280 cm2  V−1s−1 along the double-helix axis and a hole mobility of 238 cm2  V−1 s−1 perpendicular to the double-helix axis are detected. Additionally, infrared-active (IR-active) THz vibrational modes are measured, which shows excellent agreement with first-principles calculations, and an ultrafast photoexcitation-induced charge redistribution is observed that reduces the amplitude of a twisting mode of the outer SnI helix on picosecond timescales. Finally, it is shown that the carrier lifetime and mobility are limited by a trap density greater than 1018 cm−3. The results provide insight into the optical excitation and relaxation pathways of SnIP and demonstrate a remarkably high carrier mobility for such a soft and flexible material, suggesting that it could be ideally suited for flexible electronics applications.},

keywords = {Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{,

title = {Cluster Catalysis with Lattice Oxygen: Tracing Oxygen Transport from a Magnetite (001) Support onto Small Pt Clusters},

author = {S Kaiser and F Maleki and K Zhang and W Harbich and U Heiz and S Tosoni and B A J Lechner and G Pacchioni and F Esch},

url = {https://pubs.acs.org/doi/10.1021/acscatal.1c01451},

year  = {2021},

date = {2021-07-16},

urldate = {2021-07-16},

journal = {ACS Catalysis},

volume = {11},

number = {15},

pages = {9519\textendash9529},

keywords = {Foundry Inorganic, Molecularly-Functionalized, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{,

title = {Visualizing the Atomic Structure Between YSZ and LSM: An Interface Stabilized by Complexions?},

author = {T G\"{o}tsch and H Tuerk and F-P Schmidt and I Vinke and De L B Haart and R Schl\"{o}gl and K Reuter and R-A Eichel and A Knop-Gericke and C Scheurer},

issn = {1938-5862},

year  = {2021},

date = {2021-07-12},

urldate = {2021-07-12},

journal = {ECS Transactions},

volume = {103},

number = {1},

pages = {1331},

keywords = {Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{,

title = {1,10-Phenanthroline as an Efficient Bifunctional Passivating Agent for MAPbI3 Perovskite Solar Cells},

author = {A Buyruk and D Bl\"{a}tte and M G\"{u}nther and M A Scheel and N F Hartmann and M D\"{o}blinger and A Weis and A Hartschuh and P M\"{u}ller-Buschbaum and T Bein and T Ameri},

url = {https://doi.org/10.1021/acsami.1c05055},

doi = {10.1021/acsami.1c05055},

issn = {1944-8244},

year  = {2021},

date = {2021-07-09},

urldate = {2021-07-09},

journal = {ACS Applied Materials \& Interfaces},

abstract = {Passivation is one of the most promising concepts to heal defects created at the surface and grain boundaries of polycrystalline perovskite thin films, which significantly deteriorate the photovoltaic performance and stability of corresponding devices. Here, 1,10-phenanthroline, known as a bidentate chelating ligand, is implemented between the methylammonium lead iodide (MAPbI3) film and the hole-transport layer for both passivating the lead-based surface defects (undercoordinated lead ions) and converting the excess/unreacted lead iodide (PbI2) buried at interfaces, which is problematic for the long-term stability, into “neutralized” and beneficial species (PbI2(1,10-phen)x},

keywords = {Foundry Inorganic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Nonequilibrium Thermodynamics of Charge Separation in Organic Solar Cells},

author = {W Kaiser and V Jankovi\'{c} and N Vukmirovi\'{c} and A Gagliardi},

url = {https://doi.org/10.1021/acs.jpclett.1c01817},

doi = {10.1021/acs.jpclett.1c01817},

year  = {2021},

date = {2021-07-07},

journal = {The Journal of Physical Chemistry Letters},

volume = {12},

number = {27},

pages = {6389-6397},

abstract = {This work presents a novel theoretical description of the nonequilibrium thermodynamics of charge separation in organic solar cells (OSCs). Using stochastic thermodynamics, we take realistic state populations derived from the phonon-assisted dynamics of electron\textendashhole pairs within photoexcited organic bilayers to connect the kinetics with the free energy profile of charge separation. Hereby, we quantify for the first time the difference between nonequilibrium and equilibrium free energy profile. We analyze the impact of energetic disorder and delocalization on free energy, average energy, and entropy. For a high disorder, the free energy profile is well-described as equilibrated. We observe significant deviations from equilibrium for delocalized electron\textendashhole pairs at a small disorder, implying that charge separation in efficient OSCs proceeds via a cold but nonequilibrated pathway. Both a large Gibbs entropy and large initial electron\textendashhole distance provide an efficient charge separation, while a decrease in the free energy barrier does not necessarily enhance charge separation.},

keywords = {Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{,

title = {Subgroup Discovery Points to the Prominent Role of Charge Transfer in Breaking Nitrogen Scaling Relations at Single-Atom Catalysts on VS2},

author = {H Li and Y Liu and K Chen and J T Margraf and Y Li and K Reuter},

url = {https://doi.org/10.1021/acscatal.1c01324},

doi = {10.1021/acscatal.1c01324},

year  = {2021},

date = {2021-07-02},

journal = {ACS Catalysis},

volume = {11},

number = {13},

pages = {7906-7914},

abstract = {The electrochemical nitrogen reduction reaction (NRR) is a much sought-after low-energy alternative to Haber\textendashBosch ammonia synthesis. Single-atom catalysts (SACs) promise to break scaling relations between adsorption energies of key NRR reaction intermediates that severely limit the performance of extended catalysts. Here, we perform a computational screening study of transition metal (TM) SACs supported on vanadium disulfide (VS2) and indeed obtain strongly broken scaling relations. A data-driven analysis by means of outlier detection and subgroup discovery reveals that this breaking is restricted to early TMs, while detailed electronic structure analysis rationalizes it in terms of strong charge transfer to the underlying support. This charge transfer selectively weakens *N and *NH adsorption and leads to promising NRR descriptors for SACs formed of earlier TMs like Ta that would conventionally not be associated with nitrogen reduction.},

keywords = {Foundry Inorganic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Strong coupling and non-local interactions in MoS2 monolayers coupled to high-Q nanocavities},

author = {C Qian and V Villafane and P Soubelet and A H\"{o}tger and T Taniguchi and K Watanabe and N P Wilson and A V Stier and A W Holleitner and J J Finley},

url = {https://ui.adsabs.harvard.edu/abs/2021arXiv210704387Q/abstract},

doi = {arXiv:2107.04387},

year  = {2021},

date = {2021-07-02},

journal = {Measurement},

volume = {495},

number = {445},

pages = {105},

abstract = {Atomically thin semiconductors can be readily integrated into a wide range of nanophotonic architectures for applications in quantum photonics and novel optoelectronic devices. We report the observation of non-local interactions of textitfree trions in pristine hBN/MoS 2 /hBN heterostructures coupled to single mode (Q >104 ) quasi 0D nanocavities. The high excitonic and photonic quality of the interaction system stem from our integrated nanofabrication approach simultaneously with the hBN encapsulation and the maximized local cavity field amplitude within the MoS 2 monolayer. We observe a non-monotonic temperature dependence of the cavity-trion interaction strength, consistent with the non-local light-matter interactions in which the free trion diffuse over lengthscales comparable to the cavity mode volume. Our approach can be generalized to other optically active 2D materials, opening the way towards harnessing novel light-matter interaction regimes for applications in quantum photonics.},

keywords = {Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{,

title = {Optically Induced Coherent Phonons in Bismuth Oxyiodide (BiOI) Nanoplatelets},

author = {S Rieger and T F\"{u}rmann and J K Stolarczyk and J Feldmann},

url = {https://doi.org/10.1021/acs.nanolett.1c00530},

doi = {10.1021/acs.nanolett.1c00530},

issn = {1530-6984},

year  = {2021},

date = {2021-06-30},

journal = {Nano Letters},

abstract = {Bismuth oxyiodide (BiOI) is a promising material for photocatalysis combining intriguing optical and structural properties. We show that excitation by a femtosecond laser pulse creates coherent phonons inducing a time-variant oscillating modulation of the optical density. We find that the two underlying frequencies originate from lattice vibrations along the [001] crystallographic axis, the stacking direction of oppositely charged layers in BiOI. This is consistent with a subpicosecond charge separation driven by a built-in dipolar field. This partially screens the field, launching coherent phonons. Further, we determine the two major dephasing mechanisms that lead to the loss of vibronic coherence: (i) the anharmonic decay of an optical phonon into two acoustic phonons and (ii) phonon-carrier scattering. Our results provide a direct demonstration of the presence of an electric field in BiOI along the [001] axis and show its role in efficient charge separation that is crucial for photocatalytic applications of BiOI.},

keywords = {Foundry Inorganic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{,

title = {The Influence of the Blend Ratio, Solvent Additive, and Post-production Treatment on the Polymer Dynamics in PTB7:PCBM Blend Films},

author = {D M Schwaiger and W Lohstroh and P M\"{u}ller-Buschbaum},

url = {https://doi.org/10.1021/acs.macromol.1c00313},

doi = {10.1021/acs.macromol.1c00313},

issn = {0024-9297},

year  = {2021},

date = {2021-06-23},

urldate = {2021-06-23},

journal = {Macromolecules},

abstract = {The polymer dynamics inside a bulk heterojunction (BHJ), as used in organic solar cells, are investigated with quasielastic neutron scattering to study hydrogen motion in the polymer side chains. Different blend ratios of the polymer donor poly(4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b′]dithiophene-2,6-diyl3-fluoro-2-[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophenediyl) (PTB7) and the small molecule acceptor [6,6]phenyl-C71-butyric acid methyl ester (PCBM) are investigated. In addition, the influence of performance-enhancing measures, such as the use of the solvent additive 1,8-diiodooctane (DIO) and the post-production treatment of the BHJ films with methanol, on the polymer dynamics is studied. The analysis of mean square displacements as well as relaxation times of diffusional motions of the hydrogen atoms, located mainly in the polymer side chains, shows a gradual stiffening of the PTB7 side chains for higher PCBM loading in the BHJ films. The presence of DIO significantly increases diffusive mobility inside the films, while the methanol treatment does not affect hydrogen motions.},

keywords = {Foundry Organic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Electrical control of orbital and vibrational interlayer coupling in bi-and trilayer 2H-MoS $ _2$},

author = {J Klein and J Wierzbowski and P Soubelet and T Brumme and L Maschio and A Kuc and K M\"{u}ller and A V Stier and J J Finley},

url = {https://arxiv.org/abs/2106.11839},

doi = {arXiv:2106.11839v1},

year  = {2021},

date = {2021-06-22},

journal = {arXiv preprint arXiv:2106.11839},

abstract = {Manipulating electronic interlayer coupling in layered van der Waals (vdW) materials is essential for designing opto-electronic devices. Here, we control vibrational and electronic interlayer coupling in bi- and trilayer 2H-MoS2 using large external electric fields in a micro-capacitor device. The electric field lifts Raman selection rules and activates phonon modes in excellent agreement with ab-initio calculations. Through polarization resolved photoluminescence spectroscopy in the same device, we observe a strongly tunable valley dichroism with maximum circular polarization degree of ∼60% in bilayer and ∼35% in trilayer MoS2 that are fully consistent with a rate equation model which includes input from electronic band structure calculations. We identify the highly delocalized electron wave function between the layers close to the high symmetry Q points as the origin of the tunable circular dichroism. Our results demonstrate the possibility of electric field tunable interlayer coupling for controlling emergent spin-valley physics and hybridization driven effects in vdW materials and their heterostructures.},

keywords = {Foundry Inorganic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Solid-State Electrolytes: Characterization and Quantification of Depletion and Accumulation Layers in Solid-State Li+-Conducting Electrolytes Using In Situ Spectroscopic Ellipsometry (Adv. Mater. 24/2021)},

author = {L Katzenmeier and L Carstensen and S J Schaper and P M\"{u}ller-Buschbaum and A S Bandarenka},

url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.202170190},

doi = {https://doi.org/10.1002/adma.202170190},

issn = {0935-9648},

year  = {2021},

date = {2021-06-18},

urldate = {2021-06-18},

journal = {Advanced Materials},

volume = {33},

number = {24},

pages = {2100585},

abstract = {Layers depleted of Li-ions in solid-state electrolytes have a substantial impact on the performance of all-solid-state batteries. In article number 2100585, Aliaksandr S. Bandarenka and co-workers develop a practical strategy to measure the thickness of such space charge layers and the corresponding concentration of Li-ions by applying spectroscopic ellipsometry to emerging battery materials.},

keywords = {Foundry Inorganic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{,

title = {Tailoring Ordered Mesoporous Titania Films via Introducing Germanium Nanocrystals for Enhanced Electron Transfer Photoanodes for Photovoltaic Applications},

author = {N Li and R Guo and W Chen and V K\"{o}rstgens and J E Heger and S Liang and C J Brett and M A Hossain and J Zheng and P S Deimel and A Buyruk and F Allegretti and M Schwartzkopf and J G C Veinot and G Schmitz and J V Barth and T Ameri and S V Roth and P M\"{u}ller-Buschbaum},

url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/adfm.202102105},

doi = {https://doi.org/10.1002/adfm.202102105},

issn = {1616-301X},

year  = {2021},

date = {2021-06-17},

journal = {Advanced Functional Materials},

volume = {n/a},

number = {n/a},

pages = {2102105},

abstract = {Abstract Based on a diblock-copolymer templated sol\textendashgel synthesis, germanium nanocrystals (GeNCs) are introduced to tailor mesoporous titania (TiO2) films for obtaining more efficient anodes for photovoltaic applications. After thermal annealing in air, the hybrid films with different GeNC content are investigated and compared with films undergoing an argon atmosphere annealing. The surface and inner morphologies of the TiO2/GeOx nanocomposite films are probed via scanning electron microscopy and grazing-incidence small-angle X-ray scattering. The crystal phase, chemical composition, and optical properties of the nanocomposite films are examined with transmission electron microscopy, X-ray photoelectron spectroscopy, and ultraviolet\textendashvisible spectroscopy. Special focus is set on the air-annealed nanocomposite films since they hold greater promise for photovoltaics. Specifically, the charge\textendashcarrier dynamics of these air-annealed nanocomposite films are studied, and it is found that, compared with pristine TiO2 photoanodes, the GeNC addition enhances the electron transfer, yielding an increase in the short-circuit photocurrent density of exemplary perovskite solar cells and thus, an enhanced device efficiency as well as a significantly reduced hysteresis.},

keywords = {Foundry Inorganic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{,

title = {State of the Art and Prospects for Halide Perovskite Nanocrystals},

author = {A Dey and J Ye and A De and E Debroye and S K Ha and E Bladt and A S Kshirsagar and Z Wang and J Yin and Y Wang and L N Quan and F Yan and M Gao and X Li and J Shamsi and T Debnath and M Cao and M A Scheel and S Kumar and J A Steele and M Gerhard and L Chouhan and K Xu and X-G Wu and Y Li and Y Zhang and A Dutta and C Han and I Vincon and A L Rogach and A Nag and A Samanta and B A Korgel and C-J Shih and D R Gamelin and D H Son and H Zeng and H Zhong and H Sun and H V Demir and I G Scheblykin and I Mora-Ser\'{o} and J K Stolarczyk and J Z Zhang and J Feldmann and J Hofkens and J M Luther and J P\'{e}rez-Prieto and L Li and L Manna and M I Bodnarchuk and M V Kovalenko and M B J Roeffaers and N Pradhan and O F Mohammed and O M Bakr and P Yang and P M\"{u}ller-Buschbaum and P V Kamat and Q Bao and Q Zhang and R Krahne and R E Galian and S D Stranks and S Bals and V Biju and W A Tisdale and Y Yan and R L Z Hoye and L Polavarapu},

url = {https://doi.org/10.1021/acsnano.0c08903},

doi = {10.1021/acsnano.0c08903},

issn = {1936-0851},

year  = {2021},

date = {2021-06-17},

urldate = {2021-06-17},

journal = {ACS Nano},

abstract = {Metal-halide perovskites have rapidly emerged as one of the most promising materials of the 21st century, with many exciting properties and great potential for a broad range of applications, from photovoltaics to optoelectronics and photocatalysis. The ease with which metal-halide perovskites can be synthesized in the form of brightly luminescent colloidal nanocrystals, as well as their tunable and intriguing optical and electronic properties, has attracted researchers from different disciplines of science and technology. In the last few years, there has been a significant progress in the shape-controlled synthesis of perovskite nanocrystals and understanding of their properties and applications. In this comprehensive review, researchers having expertise in different fields (chemistry, physics, and device engineering) of metal-halide perovskite nanocrystals have joined together to provide a state of the art overview and future prospects of metal-halide perovskite nanocrystal research.},

keywords = {Foundry Inorganic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{,

title = {Multidimensional Morphology Control for PS-b-P4VP Templated Mesoporous Iron (III) Oxide Thin Films},

author = {S Yin and W Cao and Q Ji and Y Cheng and L Song and N Li and C L Weindl and M Schwartzkopf and S V Roth and P M\"{u}ller-Buschbaum},

url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/admi.202100141},

doi = {https://doi.org/10.1002/admi.202100141},

issn = {2196-7350},

year  = {2021},

date = {2021-06-12},

journal = {Advanced Materials Interfaces},

volume = {n/a},

number = {n/a},

pages = {2100141},

abstract = {Abstract Mesoporous α-Fe2O3 thin films with large area homogeneity demonstrate tremendous potential in multiple applications. In the present work, the synthesis of morphology-controlled α-Fe2O3 thin films is realized with polystyrene-block-poly(4-vinyl pyridine) (PS-b-P4VP) diblock copolymer assisted sol-gel chemistry. The solvent category (DMF and 1,4-dioxane) and polymer-to-FeCl3 ratio used for the solution preparation are systematically varied to tune the morphology of the thin films. For both solvents, DMF and 1,4-dioxane, nanocluster structures are obtained with low PS-b-P4VP concentration. When the concentration of PS-b-P4VP reaches the critical micelle concentration, spherical and wormlike porous structures are specifically formed in the DMF and 1,4-dioxane solvent system, respectively. Further increasing the polymer-to-FeCl3 ratios leads to the enlargement of the spherical pore sizes in the DMF system, whereas the center-to-center distances of the wormlike structures in the 1,4-dioxane system decrease. Moreover, DMF/1,4-dioxane solvent mixtures with different volume ratios are applied for the sol\textendashgel solution preparation to gain more insight into how the solvent selectivity affects the thin film morphology. By adjusting the preferential affinity of the solvent mixture to the polymer blocks, a spherical to wormlike pore shape transition is observed with a critical Δχ value of around 0.77.},

keywords = {Foundry Inorganic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{,

title = {Dual Nanoresonators for Ultrasensitive Chiral Detection},

author = {E Mohammadi and A Tittl and K L Tsakmakidis and T V Raziman and A G Curto},

url = {https://doi.org/10.1021/acsphotonics.1c00311},

doi = {10.1021/acsphotonics.1c00311},

year  = {2021},

date = {2021-05-28},

journal = {ACS Photonics},

abstract = {The discrimination of enantiomers is crucial in biochemistry. However, chiral sensing faces significant limitations due to inherently weak chiroptical signals. Nanophotonics is a promising solution to enhance sensitivity thanks to increased optical chirality maximized by strong electric and magnetic fields. Metallic and dielectric nanoparticles can separately provide electric and magnetic resonances. Here we propose their synergistic combination in hybrid metal\textendashdielectric nanostructures to exploit their dual character for superchiral fields beyond the limits of single particles. For optimal optical chirality, in addition to maximization of the resonance strength, the resonances must spectrally coincide. Simultaneously, their electric and magnetic fields must be parallel and π/2 out of phase and spatially overlap. We demonstrate that the interplay between the strength of the resonances and these optimal conditions constrains the attainable optical chirality in resonant systems. Starting from a simple symmetric nanodimer, we derive closed-form expressions elucidating its fundamental limits of optical chirality. Building on the trade-offs of different classes of dimers, we then suggest an asymmetric dual dimer based on realistic materials. These dual nanoresonators provide strong and decoupled electric and magnetic resonances together with optimal conditions for chiral fields. Finally, we introduce more complex dual building blocks for a metasurface with a record 300-fold enhancement of local optical chirality in nanoscale gaps, enabling circular dichroism enhancement by a factor of 20. By combining analytical insight and practical designs, our results put forward hybrid resonators to increase chiral sensitivity, particularly for small molecular quantities.},

keywords = {Foundry Organic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{,

title = {Nano-Scale Complexions Facilitate Li Dendrite-Free Operation in LATP Solid-State Electrolyte},

author = {S Stegmaier and R Schierholz and I Povstugar and J Barthel and S P Rittmeyer and S Yu and S Wengert and S Rostami and H Kungl and K Reuter and R-A Eichel and C Scheurer},

url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/aenm.202100707},

doi = {https://doi.org/10.1002/aenm.202100707},

issn = {1614-6832},

year  = {2021},

date = {2021-05-28},

journal = {Advanced Energy Materials},

volume = {n/a},

number = {n/a},

pages = {2100707},

abstract = {Abstract Dendrite formation and growth remains a major obstacle toward high-performance all solid-state batteries using Li metal anodes. The ceramic Li(1+x)Al(x)Ti(2−x)(PO4)3 (LATP) solid-state electrolyte shows a higher than expected stability against electrochemical decomposition despite a bulk electronic conductivity that exceeds a recently postulated threshold for dendrite-free operation. Here, transmission electron microscopy, atom probe tomography, and first-principles based simulations are combined to establish atomistic structural models of glass-amorphous LATP grain boundaries. These models reveal a nanometer-thin complexion layer that encapsulates the crystalline grains. The distinct composition of this complexion constitutes a sizable electronic impedance. Rather than fulfilling macroscopic bulk measures of ionic and electronic conduction, LATP might thus gain the capability to suppress dendrite nucleation by sufficient local separation of charge carriers at the nanoscale.},

keywords = {Foundry Inorganic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{,

title = {Fast and accurate determination of the electroactive surface area of MnOx},

author = {M H Aufa and S A Watzele and S Hou and R W Haid and R M Kluge and A S Bandarenka and B Garlyyev},

url = {https://www.sciencedirect.com/science/article/pii/S0013468621009828},

doi = {https://doi.org/10.1016/j.electacta.2021.138692},

issn = {0013-4686},

year  = {2021},

date = {2021-05-27},

journal = {Electrochimica Acta},

volume = {389},

pages = {138692},

abstract = {Manganese oxide (MnOx)-based materials are widely utilized in the field of electrocatalysis as bifunctional electrocatalysts for the oxygen reduction and evolution reactions. However, for an accurate assessment of their performance, the determination of their electrochemical active surface area (ECSA) is of paramount importance. So far, there is no fast and reproducible methodology. This article presents an easily applicable and affordable technique to determine the ECSA of MnOx accurately. The presented methodology makes use of the specific adsorption capacitance of reaction intermediates close to the onset potential of the oxygen evolution reaction. The electrochemical impedance spectroscopy is utilized to measure the specific adsorption capacitances at different potentials. Using MnOx thin-film electrodes, we determine the specific adsorption capacitances and present calibration values, which can be used for an accurate determination of the ECSA of different, for instance, nanostructured materials.},

keywords = {Foundry Inorganic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{,

title = {Characterization and Quantification of Depletion and Accumulation Layers in Solid-State Li+-Conducting Electrolytes Using In Situ Spectroscopic Ellipsometry},

author = {L Katzenmeier and L Carstensen and S J Schaper and P M\"{u}ller-Buschbaum and A S Bandarenka},

url = {http://europepmc.org/abstract/MED/33955614 

https://doi.org/10.1002/adma.202100585},

doi = {10.1002/adma.202100585},

issn = {0935-9648},

year  = {2021},

date = {2021-05-06},

journal = {Advanced Materials},

pages = {e2100585},

abstract = {The future of mobility depends on the development of next-generation battery technologies, such as all-solid-state batteries. As the ionic conductivity of solid Li^{+} -conductors can, in some cases, approach that of liquid electrolytes, a significant remaining barrier faced by solid-state electrolytes (SSEs) is the interface formed at the anode and cathode materials, with chemical instability and physical resistances arising. The physical properties of space charge layers (SCLs), a widely discussed phenomenon in SSEs, are still unclear. In this work, spectroscopic ellipsometry is used to characterize the accumulation and depletion layers. An optical model is developed to quantify their thicknesses and corresponding concentration changes. It is shown that the Li^{+} -depleted layer (≈190 nm at 1 V) is thinner than the accumulation layer (≈320 nm at 1 V) in a glassy lithium-ion-conducting glass ceramic electrolyte (a trademark of Ohara Corporation). The in situ approach combining electrochemistry and optics resolves the ambiguities around SCL formation. It opens up a wide field of optical measurements on SSEs, allowing various experimental studies in the future.},

keywords = {Foundry Inorganic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Selective area growth of GaN nanowires and nanofins by molecular beam epitaxy on heteroepitaxial diamond (001) substrates},

author = {F Pantle and F Becker and M Kraut and S W\"{o}rle and T Hoffmann and S Artmeier and M Stutzmann},

url = {http://dx.doi.org/10.1039/D1NA00221J},

doi = {10.1039/D1NA00221J},

year  = {2021},

date = {2021-05-05},

journal = {Nanoscale Advances},

volume = {3},

number = {13},

pages = {3835-3845},

abstract = {GaN-on-diamond is a promising route towards reliable high-power transistor devices with outstanding performances due to better heat management, replacing common GaN-on-SiC technologies. Nevertheless, the implementation of GaN-on-diamond remains challenging. In this work, the selective area growth of GaN nanostructures on cost-efficient, large-scale available heteroepitaxial diamond (001) substrates by means of plasma-assisted molecular beam epitaxy is investigated. Additionally, we discuss the influence of an AlN buffer on the morphology of the GaN nanostructures. The nanowires and nanofins are characterized by a very high selectivity and controllable dimensions. Low temperature photoluminescence measurements are used to evaluate their structural quality. The growth of two GaN crystal domains, which are in-plane rotated against each other by 30°, is observed. The favoring of a certain domain is determined by the off-cut direction of the diamond substrates. By X-ray diffraction we show that the GaN nanostructures grow perpendicular to the diamond surface on off-cut diamond (001) substrates, which is in contrast to the growth on diamond (111), where the nanostructures are aligned with the substrate lattice. Polarity-selective wet chemical etching and Kelvin probe force microscopy reveal that the GaN nanostructures grow solely in the Ga-polar direction. This is a major advantage compared to the growth on diamond (111) and enables the application of GaN nanostructures on cost-efficient diamond for high-power/high-frequency applications.},

keywords = {Molecularly-Functionalized, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Review on physical impedance models in modern battery research},

author = {R R Gaddam and L Katzenmeier and X Lamprecht and A S Bandarenka},

url = {http://dx.doi.org/10.1039/D1CP00673H},

doi = {10.1039/D1CP00673H},

issn = {1463-9076},

year  = {2021},

date = {2021-05-04},

journal = {Physical Chemistry Chemical Physics},

volume = {23},

number = {23},

pages = {12926-12944},

abstract = {Electrochemical impedance spectroscopy (EIS) is a versatile tool to understand complex processes in batteries. This technique can investigate the effects of battery components like the electrode and electrolyte, electrochemical reactions, interfaces, and interphases forming in the electrochemical systems. The interpretation of the EIS data is typically made using models expressed in terms of the so-called electrical equivalent circuits (EECs) to fit the impedance spectra. Therefore, the EECs must unambiguously represent the electrochemistry of the system. EEC models with a physical significance are more relevant than the empirical ones with their inherent imperfect description of the ongoing processes. This review aims to present the readers with the importance of physical EEC modeling within the context of battery research. A general introduction to EIS and EEC models along with a brief description of the mathematical formalism is provided, followed by showcasing the importance of physical EEC models for EIS on selected examples from the research on traditional, aqueous, and newer all-solid-state battery systems.},

keywords = {Foundry Inorganic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Conformational Control of Chemical Reactivity for Surface-Confined Ru-Porphyrins},

author = {P Knecht and J Reichert and P S Deimel and P Feulner and F Haag and F Allegretti and M Garnica and M Schwarz and W Auw\"{a}rter and P T P Ryan and T-L Lee and D A Duncan and A P Seitsonen and J V Barth and A C Papageorgiou},

url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/anie.202104075},

doi = {https://doi.org/10.1002/anie.202104075},

issn = {1433-7851},

year  = {2021},

date = {2021-05-03},

journal = {Angewandte Chemie International Edition},

volume = {60},

number = {30},

pages = {16561-16567},

abstract = {Abstract We assess the crucial role of tetrapyrrole flexibility in the CO ligation to distinct Ru-porphyrins supported on an atomistically well-defined Ag(111) substrate. Our systematic real-space visualisation and manipulation experiments with scanning tunnelling microscopy directly probe the ligation, while bond-resolving atomic force microscopy and X-ray standing-wave measurements characterise the geometry, X-ray and ultraviolet photoelectron spectroscopy the electronic structure, and temperature-programmed desorption the binding strength. Density-functional-theory calculations provide additional insight into the functional interface. We unambiguously demonstrate that the substituents regulate the interfacial conformational adaptability, either promoting or obstructing the uptake of axial CO adducts.},

keywords = {Foundry Inorganic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Global Property Prediction: A Benchmark Study on Open-Source, Perovskite-like Datasets},

author = {F Mayr and A Gagliardi},

url = {https://doi.org/10.1021/acsomega.1c00991},

doi = {10.1021/acsomega.1c00991},

year  = {2021},

date = {2021-05-03},

journal = {ACS Omega},

volume = {6},

number = {19},

pages = {12722-12732},

abstract = {Screening combinatorial space for novel materials, such as perovskite-like ones for photovoltaics, has resulted in a high amount of simulated high-throughput data and analysis thereof. This study proposes a comprehensive comparison of structural fingerprint-based machine learning models on seven open-source databases of perovskite-like materials to predict band gaps and energies. It shows that none of the given methods, including graph neural networks, are able to capture arbitrary databases evenly, while underlining that commonly used metrics are highly database-dependent in typical workflows. In addition, the applicability of variance selection and autoencoders to significantly reduce fingerprint size indicates that models built with common fingerprints only rely on a submanifold of the available fingerprint space.},

keywords = {Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Controlling exciton many-body states by the electric-field effect in monolayer $mathrmMoS_2$},

author = {J Klein and A H\"{o}tger and M Florian and A Steinhoff and A Delhomme and T Taniguchi and K Watanabe and F Jahnke and A W Holleitner and M Potemski and C Faugeras and J J Finley and A V Stier},

url = {https://link.aps.org/doi/10.1103/PhysRevResearch.3.L022009},

doi = {10.1103/PhysRevResearch.3.L022009},

year  = {2021},

date = {2021-04-30},

journal = {Physical Review Research},

volume = {3},

number = {2},

pages = {L022009},

abstract = {We report magneto-optical spectroscopy of gated monolayer 

MoS2 in high magnetic fields up to 28T and obtain new insights on the many-body interaction of neutral and charged excitons with the resident charges of distinct spin and valley texture. For neutral excitons at low electron doping, we observe a nonlinear valley Zeeman shift due to dipolar spin-interactions that depends sensitively on the local carrier concentration. As the Fermi energy increases to dominate over the other relevant energy scales in the system, the magneto-optical response depends on the occupation of the fully spin-polarized Landau levels (LL) in both K/K′ valleys. This manifests itself in a many-body state. Our experiments demonstrate that the exciton in monolayer semiconductors is only a single particle boson close to charge neutrality. We find that away from charge neutrality it smoothly transitions into polaronic states with a distinct spin-valley flavor that is defined by the LL quantized spin and valley texture.},

keywords = {Foundry Inorganic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{,

title = {Anapole-Assisted Absorption Engineering in Arrays of Coupled Amorphous Gallium Phosphide Nanodisks},

author = {L H\"{u}ttenhofer and A Tittl and L K\"{u}hner and E Cort\'{e}s and S A Maier},

url = {https://doi.org/10.1021/acsphotonics.1c00238},

doi = {10.1021/acsphotonics.1c00238},

year  = {2021},

date = {2021-04-26},

journal = {ACS Photonics},

abstract = {Broadband solar light harvesting plays a crucial role for efficient energy conversion. Anapole excitations and associated absorption engineering in dielectric nanoresonators are a focus of nanophotonic research due to the intricate combination of nonradiating modes and strong electromagnetic field confinement in the underlying material. The arising high field strengths are used for enhanced second-harmonic generation and photocatalysis, where devices require large areas with closely spaced nanoresonators for sizable photonic yields. However, most anapole studies have so far been carried out at the single-particle level, neglecting the influence of anapole\textendashanapole interactions. Here, we present a systematic study of coupling mechanisms in rectangular arrays of amorphous GaP nanodisks that support anapole excitations at 600 nm, which is within the lossy spectral regime of the material. Our experimental findings show that maximum visible light extinction by the array and maximum absorption in the GaP are not achieved by the densest packing of resonators. Counterintuitively, increasing the array periodicities such that collective effects spectrally overlap with the anapole excitation of a single particle leads to an absorption enhancement of up to 300% compared to a single disk. An analysis of coupling in one- and two-dimensional arrays with polarization-dependent measurements and numerical simulations allows us to discriminate between coupling interactions parallel and perpendicular to the polarization axis and evaluate their strengths. Utilizing a multipolar decomposition of excitations in single nanodisks embedded in one-dimensional arrays, we can attribute the coupling to enhanced electric and toroidal dipoles under variation of the interparticle spacing. Our results provide a fundamental understanding of tailored light absorption in coupled anapole resonators and reveal important design guidelines for advanced metasurface approaches in a wide range of energy conversion applications.},

keywords = {Foundry Inorganic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{,

title = {Photovoltaic Cells Based on Ternary P3HT:PCBM:Ruthenium(II) Complex Bearing 8-(diphenylphosphino)quinoline Active Layer},

author = {S Akel and M A Sharif and R Al-Esseili and M A Al-Wahish and H A Hodali and P M\"{u}ller-Buschbaum and L Schmidt-Mende and M Al-Hussein},

url = {https://www.sciencedirect.com/science/article/pii/S0927775721005549},

doi = {https://doi.org/10.1016/j.colsurfa.2021.126685},

issn = {0927-7757},

year  = {2021},

date = {2021-04-24},

urldate = {2021-04-24},

journal = {Colloids and Surfaces A: Physicochemical and Engineering Aspects},

pages = {126685},

abstract = {ABSTRACT Optical, morphological and photovoltaic properties are investigated for ternary solar cells containing a traditional poly(3-hexylthiophene-2,5-diyl):[6,6]-phenyl-C61-butyric-acid-methyl ester (P3HT:PCBM) bulkheterojunction (BHJ) active layer modified with different concentrations of a novel ruthenium complex [Ru(N-P)2(O-O)], where N-P abbreviates 8-(diphenylphosphino)quinolone and O-O = oxalate dianion. At a low concentration of the Ru-complex (2.5wt. %) the device efficiency is improved by 50% compared with the reference binary devices at ambient conditions. This substantial efficiency enhancement is attributed to the role of the Ru-complex in improving light absorption over a wavelength range of (295-800nm) in combination with a better matching of the energy levels of the ternary blend system. Moreover, at low concentration, the Ru-complex has a positive impact on the morphology of the active layer in the device. The inclusion of Ru-complex increases the P3HT crystallinity substantially with virtually no effect on the size and orientation of the crystalline lamellae. The enhancement in device efficiency becomes less pronounced with increasing the concentration of the Ru-complex due to the formation of several micron-size domains of [Ru(N-P)2(O-O)] in the ternary active layers. These large domains negatively affect the optical properties and morphology, thus inhibiting efficient charge generation and transport in the corresponding solar cells.},

keywords = {Foundry Organic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{,

title = {Hot electron physics and applications},

author = {L V Besteiro and E Cort\'{e}s and S Ishii and P Narang and R F Oulton},

url = {https://aip.scitation.org/doi/abs/10.1063/5.0050796},

doi = {10.1063/5.0050796},

year  = {2021},

date = {2021-04-19},

journal = {Journal of Applied Physics},

volume = {129},

number = {15},

pages = {150401},

keywords = {Solid-Liquid, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{,

title = {Bright single photon emitters with enhanced quantum efficiency in a two-dimensional semiconductor coupled with dielectric nano-antennas},

author = {L Sortino and P G Zotev and C L Phillips and A J Brash and J Cambiasso and E Marensi and A M Fox and S A Maier and R Sapienza and A I Tartakovskii},

year  = {2021},

date = {2021-04-05},

journal = {arXiv preprint arXiv:2103.16986},

keywords = {Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Ultrafine TiO2 Nanoparticle Supported Nitrogen-Rich Graphitic Porous Carbon as an Efficient Anode Material for Potassium-Ion Batteries},

author = {D P Dubal and A Schneemann and V Ranc and \v{S} Kment and O Tomanec and M Petr and H Kmentova and M Otyepka and R Zbo\v{r}il and R A Fischer and K Jayaramulu},

url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/aesr.202100042},

doi = {https://doi.org/10.1002/aesr.202100042},

issn = {2699-9412},

year  = {2021},

date = {2021-03-17},

journal = {Advanced Energy and Sustainability Research},

volume = {2},

number = {9},

pages = {2100042},

abstract = {Potassium-ion batteries (KIBs) have attracted enormous attention as a next-generation energy storage system due to their low cost, fast ionic conductivity within electrolytes, and high operating voltage. However, developing suitable electrode materials to guarantee high-energy output and structural stability to ensure long cycling performance remains a critical challenge. Herein, anatase TiO2 nanoparticles are encapsulated in nitrogen-rich graphitic carbon (TiO2@NGC) with hierarchical pores and high surface area (250 m2 g−1) using the Ti-based metal\textendashorganic framework NH2-MIL-125 (Ti8O8(OH)4(NH2-bdc)6 with NH2-bdc2− = 2-amino-1,4-benzenedicarboxylate) as a sacrificial template. Serving as the anode material in a K-ion half-cell, TiO2@NGC delivers a high capacity of 228 mA h g−1 with remarkable cycling performance (negligible loss over 2000 cycles with more than 98% Coulombic efficiency). The charge-storing mechanism is underpinned using ex situ characterization techniques such as ex situ X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis. It is revealed that the original TiO2 phase gets transformed to the anorthic Ti7O13 and monoclinic K2Ti4O9 phase after the first charge/discharge cycle, which further initiates the charge storage process via the conversion reactions.},

keywords = {Foundry Inorganic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Assembly and Manipulation of a Prototypical N-Heterocyclic Carbene with a Metalloporphyrin Pedestal on a Solid Surface},

author = {P Knecht and B Zhang and J Reichert and D A Duncan and M Schwarz and F Haag and P T P Ryan and T-L Lee and P S Deimel and P Feulner and F Allegretti and W Auw\"{a}rter and G M\'{e}dard and A P Seitsonen and J V Barth and A C Papageorgiou},

url = {https://doi.org/10.1021/jacs.1c01229},

doi = {10.1021/jacs.1c01229},

issn = {0002-7863},

year  = {2021},

date = {2021-03-11},

journal = {Journal of the American Chemical Society},

volume = {143},

number = {11},

pages = {4433-4439},

abstract = {The controlled arrangement of N-heterocyclic carbenes (NHCs) on solid surfaces is a current challenge of surface functionalization. We introduce a strategy of using Ru porphyrins in order to control both the orientation and lateral arrangement of NHCs on a planar surface. The coupling of the NHC to the Ru porphyrin is a facile process which takes place on the interface: we apply NHCs as functional, robust pillars on well-defined, preassembled Ru porphyrin monolayers on silver and characterize these interfaces with atomic precision via a battery of experimental techniques and theoretical considerations. The NHCs assemble at room temperature modularly and reversibly on the Ru porphyrin arrays. We demonstrate a selective and complete functionalization of the Ru centers. With its binding, the NHC modifies the interaction of the Ru porphyrin with the Ag surface, displacing the Ru atom by 1 r{A} away from the surface. This arrangement of NHCs allows us to address individual ligands by controlled manipulation with the tip of a scanning tunneling microscope, creating patterned structures on the nanometer scale.},

keywords = {Foundry Organic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Phase formation through synthetic control: polymorphism in the sodium-ion solid electrolyte Na4P2S6},

author = {T Scholz and C Schneider and R Eger and V Duppel and I Moudrakovski and A Schulz and J Nuss and B V Lotsch},

url = {http://dx.doi.org/10.1039/D0TA11008F},

doi = {10.1039/D0TA11008F},

issn = {2050-7488},

year  = {2021},

date = {2021-03-10},

journal = {Journal of Materials Chemistry A},

volume = {9},

number = {13},

pages = {8692-8703},

abstract = {The development of all-solid-state sodium batteries for scalable energy storage solutions requires fast sodium conducting solid electrolytes. To fast-track their discovery, candidate materials need to be identified that are synthesized from abundant resources via cheap and green synthesis routes. Their ion conducting mechanism has to be understood and adapted to meet the stringent requirements for long-term operation in all-solid-state batteries. Here, structure and properties of the sodium hexathiohypodiphosphate Na4P2S6 obtained by two different synthesis methods are compared: a solid-state reaction and a precipitation route from aqueous solution. Combined investigations using powder X-ray diffraction (PXRD), precession electron diffraction (PED), differential scanning calorimetry (DSC), solid-state nuclear magnetic resonance spectroscopy (ssNMR), and Raman spectroscopy reveal that the solid-state synthesized material is characterized by a Na+ and vacancy disorder-driven enantiotropic phase transition at 160 °C (α- to β-Na4P2S6), which is accompanied by a symmetry change of the P2S64− anion. Precipitated Na4P2S6 already crystallizes in a β-like polymorph at room temperature, likely assisted by inter- and intralayer defects. Bond-valence and nudged elastic band (NEB) calculations were employed to identify a low energy, 2D conduction network in β-Na4P2S6, suggesting facile 2D long-range Na+ diffusion. Electrochemical impedance spectroscopy reveals a higher ionic conductivity at room temperature in precipitated β-like Na4P2S6 (2 × 10−6 S cm−1) compared to the solid-state α polymorph (7 × 10−7 S cm−1). The activation energy is around 0.4 eV for both materials. The findings highlight that even subtle structural changes can significantly impact the sodium-ion diffusion in solid electrolytes and at the same time reveal an intricate interplay between phase formation and synthetic control.},

keywords = {Foundry Inorganic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Role of cation-mediated recombination in perovskite solar cells},

author = {A Singh and W Kaiser and A Gagliardi},

url = {https://www.sciencedirect.com/science/article/pii/S0927024820305092},

doi = {https://doi.org/10.1016/j.solmat.2020.110912},

issn = {0927-0248},

year  = {2021},

date = {2021-03-01},

journal = {Solar Energy Materials and Solar Cells},

volume = {221},

pages = {110912},

abstract = {The origin of the hysteresis in the current\textendashvoltage (J\textendashV) characteristics in perovskite solar cells (PSCs) is one of the most debated topics of recent years. Hysteretic effects are connected with the slow redistribution of ionic defects during the voltage sweep. Existing literature focuses on the potential screening due to accumulated ions, solely, while neglecting the possibility of charge trapping and subsequent recombination via ions. We investigate the role of cation-mediated recombination of ions using time-dependent drift\textendashdiffusion simulations in MAPbI3 PSCs. Slow-moving cations are considered as traps for the electrons. Trapped electrons can subsequently recombine non-radiatively with holes. We analyze the role of the cation-mediated trapping and its parameters (capture coefficient, cation energy, ion mobility) as well as the scan rate on the device performance. For shallow cation energies, a decrease in open-circuit voltage and slight enhancement in hysteresis is observed. Deep cation energies lead to a substantial deterioration of device performance and large hysteresis enhancement. The presented study emphasizes the importance of considering the interaction of ions with charge carriers beyond the simple electrostatic models to improve our understanding of PSCs.},

keywords = {Foundry Inorganic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{,

title = {Properties of the Space Charge Layers Formed in Li-Ion Conducting Glass Ceramics},

author = {L Katzenmeier and S Helmer and S Braxmeier and E Knobbe and A S Bandarenka},

url = {https://doi.org/10.1021/acsami.0c21304},

doi = {10.1021/acsami.0c21304},

issn = {1944-8244},

year  = {2021},

date = {2021-02-03},

journal = {ACS Applied Materials \& Interfaces},

volume = {13},

number = {4},

pages = {5853-5860},

abstract = {For years, the space charge layer formation in Li-conducting solid electrolytes and its relevance to so-called all solid-state batteries have been controversially discussed from experimental and theoretical perspectives. In this work, we observe the phenomenon of space charge layer formation using impedance spectroscopy at different electrode polarizations. We analyze the properties of these space charge layers using a physical equivalent circuit describing the response of the solid electrolytes and solid/solid electrified interfaces under blocking conditions. The elements corresponding to the interfacial layers are identified and analyzed with different electrode metals and applied biases. The effective thickness of the space charge layer was calculated to be ∼60 nm at a bias potential of 1 V. In addition, it was possible to estimate the relative permittivity of the electrolytes, specific resistance of the space charge layer, and the effective thickness of the electric double layer (∼0.7 nm).},

keywords = {Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{,

title = {Electronic properties of semiconducting Zn(Si, Ge, Sn)N2 alloys},

author = {M Ogura and D Han and M M Pointner and L S Junkers and S S Rudel and W Schnick and H Ebert},

url = {https://link.aps.org/doi/10.1103/PhysRevMaterials.5.024601},

doi = {10.1103/PhysRevMaterials.5.024601},

year  = {2021},

date = {2021-02-02},

urldate = {2021-02-02},

journal = {Physical Review Materials},

volume = {5},

number = {2},

pages = {024601},

keywords = {Foundry Inorganic, Solid-Solid},

pubstate = {published},

tppubtype = {article}

}

@article{,

title = {Examination of possible high-pressure candidates of SnTiO3: The search for novel ferroelectric materials},

author = {F Pielnhofer and L Diehl and A Jim\'{e}nez-Solano and A Bussmann-Holder and J C Sch\"{o}n and B V Lotsch},

url = {https://aip.scitation.org/doi/abs/10.1063/5.0029968},

doi = {10.1063/5.0029968},

year  = {2021},

date = {2021-02-02},

journal = {APL Materials},

volume = {9},

number = {2},

pages = {021103},

keywords = {Solid-Solid},

pubstate = {published},

tppubtype = {article}

}