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- W3203553516 abstract "Abstract Chalcohalide semiconductors are an emergent class of materials for optoelectronics. Here, the first work on BiSI chalcohalide thin film photodetectors (PDs) is presented. An entirely new method for the fabrication of bismuth chalcohalide thin films (BiOI and BiSI) is developed. This method circumvents the use of any ligands or counter ions during fabrication and provides highly pure thin films free of carbon residues and other contaminants. When integrated into lithographically patterned lateral PDs these BiSI thin films show outstanding performances and high stability. The direct ≈1.55 eV bandgap of BiSI perfectly accommodates optical sensing over the full visible spectrum. The responsivity ( R ) of the BiSI PDs reaches 62.1 A W −1 , which is the best value reported to date across chalcohalide materials of any type. The BiSI PDs display remarkable sensitivity to low light levels, supporting a broad operational detectivity ≈10 12 Jones over four decades in light intensity, with a peak specific detectivity (D*) of 2.01 × 10 13 Jones. The dynamics of photocurrent generation are demonstrated to be dominated by photoconductive gain. These results cement BiSI as an exciting candidate for high performance photodetector applications and encourage ongoing work in BiSX (X = Cl, Br, I) materials for optoelectronics." @default.
- W3203553516 created "2021-10-11" @default.
- W3203553516 creator A5007128427 @default.
- W3203553516 creator A5019027963 @default.
- W3203553516 creator A5029349019 @default.
- W3203553516 creator A5039946062 @default.
- W3203553516 creator A5046145312 @default.
- W3203553516 creator A5071302162 @default.
- W3203553516 creator A5072814611 @default.
- W3203553516 date "2021-09-27" @default.
- W3203553516 modified "2023-10-17" @default.
- W3203553516 title "High Gain Solution‐Processed Carbon‐Free BiSI Chalcohalide Thin Film Photodetectors" @default.
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