@article{nokey,

title = {Improvement of the thermoelectric properties of PEDOT:PSS films via DMSO addition and DMSO/salt post-treatment resolved from a fundamental view},

author = {S Tu and T Tian and A Lena Oechsle and S Yin and X Jiang and W Cao and N Li and M A Scheel and L K Reb and S Hou and A S Bandarenka and M Schwartzkopf and S V Roth and P M\"{u}ller-Buschbaum},

url = {https://www.sciencedirect.com/science/article/pii/S1385894721038742},

doi = {https://doi.org/10.1016/j.cej.2021.132295},

issn = {1385-8947},

year  = {2022},

date = {2022-09-06},

urldate = {2022-09-06},

journal = {Chemical Engineering Journal},

volume = {429},

pages = {132295},

abstract = {The combination of dimethyl sulfoxide (DMSO)-solvent doping and physical\textendashchemical DMSO/salt de-doping in a sequence has been used to improve the thermoelectric (TE) properties of poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) films. A high power factor of ca.105.2 µW m−1 K−2 has been achieved for the PEDOT:PSS film after post-treatment with 10 % sodium sulfite (Na2SO3) in the DMSO/salt mixture (v/v), outperforming sodium bicarbonate (NaHCO3). The initial DMSO-doping treatment induces a distinct phase separation by facilitating the aggregation of the PEDOT molecules. At the same time, the subsequent DMSO/salt de-doping post-treatment strengthens the selective removal of the surplus non-conductive PSS chains. Substantial alterations in the oxidation level, chain conformations, PEDOT crystallites and their preferential orientation are observed upon treatment on the molecular level. At the mesoscale level, the purification and densification of PEDOT-rich domains enable the realization of inter-grain coupling by the formation of the electronically well-percolated network. Thereby, both electrical conductivity and Seebeck coefficient are optimized.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {High-performance and Large-area Inverted Perovskite Solar Cells based on NiOx Films Enabled with A Novel Microstructure-Control Technology},

author = {G Shen and X Li and Y Zou and H Dong and D Zhu and Y Jiang and X R Ng and F Lin and P M\"{u}ller-Buschbaum and C Mu},

url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/eem2.12504},

doi = {https://doi.org/10.1002/eem2.12504},

year  = {2022},

date = {2022-08-26},

journal = {ENERGY \& ENVIRONMENTAL MATERIALS},

volume = {n/a},

number = {n/a},

pages = {e12504},

abstract = {Abstract The improvement in the efficiency of inverted perovskite solar cells (PSCs) is significantly limited by undesirable contact at the NiOX/perovskite interface. In this study, a novel microstructure-control technology is proposed for the fabrication of porous NiOX films using Pluronic P123 as the structure-directing agent and acetylacetone (AcAc) as the coordination agent. The synthesized porous NiOX films enhanced the hole extraction efficiency and reduced recombination defects at the NiOX/perovskite interface. Consequently, without any modification, the power conversion efficiency (PCE) of the PSC with MAPbI3 as the absorber layer improved from 16.50 to 19.08 %. Moreover, the PCE of the device composed of perovskite Cs0.05(MA0.15FA0.85)0.95Pb(I0.85Br0.15)3 improved from 17.49 to 21.42 %. Furthermore, the application of the fabricated porous NiOX on fluorine-doped tin oxide (FTO) substrates enabled the fabrication of large-area PSCs (1.2 cm2) with a PCE of 19.63 %. This study provides a novel strategy for improving the contact at the NiOX/perovskite interface for the fabrication of high-performance large-area perovskite solar cells.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Oriented Thiophene-Extended Benzotrithiophene Covalent Organic Framework Thin Films: Directional Electrical Conductivity},

author = {L Frey and J F P\"{o}hls and M Hennemann and A M\"{a}hringer and S Reuter and T Clark and R T Weitz and D D Medina},

url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/adfm.202205949},

doi = {https://doi.org/10.1002/adfm.202205949},

issn = {1616-301X},

year  = {2022},

date = {2022-08-24},

journal = {Advanced Functional Materials},

volume = {n/a},

number = {n/a},

pages = {2205949},

abstract = {Abstract The synthesis of covalent organic frameworks (COFs) based on a novel thiophene-extended benzotrithiophene (BTT) building block is described, which in combination with triazine-based amines (1,3,5-triazine-2,4,6-triyl)trianiline (TTA) or (1,3,5-triazine-2,4,6-triyl)tris(([1,1´-biphenyl]-4-amine)) (TTTBA)) affords crystalline, and porous imine-linked COFs, BTT TTA and BTT TTTBA, with surface areas as high as 932 and 1200 m2 g−1, respectively. Oriented thin films are grown successfully on different substrates, as indicated by grazing incidence diffraction (GID). Room-temperature in-plane electrical conductivity of up to 10−4 S m−1 is measured for both COFs. Temperature-dependent electrical conductivity measurements indicate activation energies of ≈123.3 meV for BTT TTA and ≈137.5 meV for BTT TTTBA and trap-dominated charge transport via a hopping mechanism for both COFs. Moreover, conductive atomic force microscopy reveals directional and defect-dominated charge transport in the oriented BTT COF films with a strong preference for the in-plane direction within the molecular 2D-planes. Quantum mechanical calculations predict BTT TTTBA to conduct holes and electrons effectively in both in-plane and out-of-plane directions. In-plane, charge carrier transport is of hopping character where the triazine cores represent the barrier. Out-of-plane, a continuous charge-carrier pathway is calculated that is hampered by an imposed structural defect simulated by a rotated molecular COF layer.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}