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Near‐infrared light‐responsive Cu‐doped Cs2AgBiBr6
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SYSNO ASEP 0536344 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Near‐infrared light‐responsive Cu‐doped Cs2AgBiBr6 Author(s) Ji, F. (SE)
Huang, Y. (SE)
Wang, F. (SE)
Kobera, Libor (UMCH-V) RID, ORCID
Xie, F. (CN)
Klarbring, J. (SE)
Abbrent, Sabina (UMCH-V) RID, ORCID
Brus, Jiří (UMCH-V) RID, ORCID
Yin, C. (SE)
Simak, S. I. (SE)
Abrikosov, I. A. (RU)
Buyanova, I. A. (SE)
Chen, W. M. (SE)
Gao, F. (SE)Article number 2005521 Source Title Advanced Functional Materials - ISSN 1616-301X
Roč. 30, č. 51 (2020), s. 1-7Number of pages 7 s. Language eng - English Country DE - Germany Keywords Cu doping ; lead-free double perovskites ; near-infrared absorption Subject RIV CB - Analytical Chemistry, Separation OECD category Analytical chemistry R&D Projects GA19-05259S GA ČR - Czech Science Foundation (CSF) Method of publishing Open access Institutional support UMCH-V - RVO:61389013 UT WOS 000570170300001 EID SCOPUS 85091004042 DOI 10.1002/adfm.202005521 Annotation Lead‐free halide double perovskites (A2BIBIIIX6) with attractive optical and electronic features are considered to be a promising candidate to overcome the toxicity and stability issues of lead halide perovskites (APbX3). However, their poor absorption profiles limit device performance. Here the absorption band edge of Cs2AgBiBr6 double perovskite to the near‐infrared range is significantly broadened by developing doped double perovskites, Cs2(Ag:Cu)BiBr6. The partial replacement of Ag ions by Cu ions in the crystal lattice is confirmed by the X‐ray photoelectron spectroscopy (XPS) and solid‐state nuclear magnetic resonance (ssNMR) measurements. Cu doping barely affects the bandgap of Cs2AgBiBr6, instead it introduces subbandgap states with strong absorption to the near‐infrared range. More interestingly, the near‐infrared absorption can generate band carriers upon excitation, as indicated by the photoconductivity measurement. This work sheds new light on the absorption modulation of halide double perovskites for future efficient optoelectronic devices. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2021 Electronic address https://onlinelibrary.wiley.com/doi/10.1002/adfm.202005521
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