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- W3189321318 abstract "Lead-free double perovskites, A2 M+ M'3+ X6 , are considered as promising alternatives to lead-halide perovskites, in optoelectronics applications. Although iodide (I) and bromide (Br) mixing is a versatile tool for bandgap tuning in lead perovskites, similar mixed I/Br double perovskite films have not been reported in double perovskites, which may be due to the large activation energy for ion migration. In this work, mixed Br/I double perovskites were realized utilizing an anion exchange method starting from Cs2 AgBiBr6 solid thin-films with large grain-size. The optical and structural properties were studied experimentally and theoretically. Importantly, the halide exchange mechanism was investigated. Hydroiodic acid was the key factor to facilitate the halide exchange reaction, through a dissolution-recrystallization process. In addition, the common organic iodide salts could successfully perform halide-exchange while retaining high mixed-halide phase stability and strong light absorption capability." @default.
- W3189321318 created "2021-08-16" @default.
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- W3189321318 date "2021-09-02" @default.
- W3189321318 modified "2023-10-16" @default.
- W3189321318 title "Mixed‐Halide Double Perovskite Cs <sub>2</sub> AgBiX <sub>6</sub> (X=Br, I) with Tunable Optical Properties via Anion Exchange" @default.
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- W3189321318 doi "https://doi.org/10.1002/cssc.202101146" @default.
- W3189321318 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8596517" @default.
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- W3189321318 hasPublicationYear "2021" @default.
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