@article{nokey,

title = {A low-cost and high-energy aqueous potassium-ion battery},

author = {R L Streng and T Steeger and A Senyshyn and S Abel and P Schneider and C Benning and B M Naranjo and D Gryc and M Z Hussain and O Lieleg and M Elsner and A S Bandarenka and K Cicvari\'{c}},

url = {https://www.sciencedirect.com/science/article/pii/S2095495625001871},

doi = {https://doi.org/10.1016/j.jechem.2025.02.039},

issn = {2095-4956},

year  = {2025},

date = {2025-07-01},

journal = {Journal of Energy Chemistry},

volume = {106},

pages = {523-531},

abstract = {To address challenges related to the intermittency of renewable energy sources, aqueous potassium-ion batteries (AKIBs) are a promising and sustainable alternative to conventional systems for large-scale energy storage. To enable their practical application, maximizing energy density and longevity while minimizing production and material costs is a key goal. In this work, we propose an AKIB consisting only of abundant and cost-efficient materials, which delivers a high energy density of more than 70 Wh kg−1. We combine simple strategies to stabilize the Mn-rich Prussian blue analog cathode by Fe-doping, improving the crystallinity, and tuning the electrolyte composition without employing expensive water-in-salt electrolytes. Using a mixed 2.5 M Ca(NO3)2 + 1.5 M KNO3 electrolyte, we assemble a novel AKIB with a Fe-doped manganese hexacyanoferrate cathode and an organic poly(naphthalene-4-formyl-ethylenediamine) anode. Besides a high energy density, the full cell delivers a specific capacity of approximately 60 mA h g−1, a power density of 5000 W kg−1, and 80% capacity retention after 600 cycles.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Fluorescence-Detected Pump\textendashProbe Spectroscopy for Artifact-Free Detection of Stokes Shift Dynamics},

author = {H Hao and P Mal\'{y} and Y Cui and M Binzer and E Thyrhaug and J Hauer},

url = {https://doi.org/10.1021/acs.jpclett.5c00646},

doi = {10.1021/acs.jpclett.5c00646},

year  = {2025},

date = {2025-05-09},

journal = {The Journal of Physical Chemistry Letters},

pages = {4861-4868},

abstract = {Fluorescence-detected pump\textendashprobe (F-PP) spectroscopy is a recently developed method to study excited-state dynamics. F-PP combines the temporal resolution of conventional transient absorption (TA) spectroscopy with the sensitivity of fluorescence detection. In this work, we demonstrate inherently phase-stable F-PP spectroscopy using 20 fs pulses to monitor the ultrafast Stokes shift dynamics of a solvated fluorophore (Y12). We observed a shift in the stimulated emission maximum with a time constant of 84 fs. In contrast to TA, F-PP provides a coherent artifact-free view of this process. Using quantitative signal background subtraction, as discussed in this work, F-PP uncovers the pure stimulated emission spectrum and its ultrafast dynamics. This signal isolation is a clear advantage over TA, where different contributions often overlap heavily. We compare results from F-PP and TA on an equal footing using the same excitation pulses, emphasizing the features and advantages of the F-PP technique.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Defect Imide Double Antiperovskites AE5AsPn(NH)2 (AE=Ca, Sr; Pn=Sb, Bi) as Potential Solar Cell Absorber Materials},

author = {T G Chau and D Han and F Wolf and S S Rudel and Y Yao and H Oberhofer and T Bein and H Ebert and W Schnick},

url = {https://doi.org/10.1002/anie.202500768},

doi = {https://doi.org/10.1002/anie.202500768},

issn = {1433-7851},

year  = {2025},

date = {2025-04-17},

journal = {Angewandte Chemie International Edition},

volume = {64},

number = {17},

pages = {e202500768},

abstract = {Abstract An abundance of oxide, halide and chalcogenide perovskites have been explored, demonstrating outstanding properties, while the emerging nitride perovskites are extremely rare due to their challenging synthesis requirements. By inverting the ion type in the perovskite structure, the corresponding antiperovskite structure is obtained. Among them, ternary antiperovskite nitrides X3AN (X=Ba, Sr, Ca, Mg; A=As, Sb) have recently been identified as exhibiting excellent optoelectronic properties. To explore the unrealized composition space of nitride perovskites, the ammonothermal method was applied, yielding three new layered quaternary imide-based defect-antiperovskites, namely AE5AsPn(NH)2 (AE=Ca, Sr; Pn=Sb, Bi). These new compounds feature distorted square-pyramidal coordination around the imide-group (Ca5NH). Layers with Ca2+ vacancies are found with an alternating As3? and Pn3? (Pn3?=Sb3?, Bi3?) coordination along the A-site, forming a two-dimensional (2D) structure. All three AE5AsPn(NH)2 compounds show suitable direct band gaps within the visible light spectrum. Density functional theory calculations reveal favorable band dispersion, as well as transport and optical properties, especially along the out-of-plane direction, demonstrating their 3D character of electronic transport. The narrow tunable direct band gaps and favorable charge carrier properties make AE5AsPn(NH)2 promising candidates for solar cell absorber materials.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}