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- W4307998957 abstract "Anion exchange of the halides, Br and I, is demonstrated through the direct mixing of two pure perovskite quantum dot solutions, CsPbBr3 and CsPbI3, and is shown to be both facile and result in a completely alloyed single phase mixed halide perovskite. Anion exchange is also observed in an interlayer printing method utilizing the pure, unalloyed perovskite solutions and a commercial inkjet printer. The halide exchange was confirmed by optical absorption spectroscopy, photoluminescent spectroscopy, X-ray diffraction, and X-ray photoemission spectroscopy characterization, and indicates that alloying is thermodynamically favorable, while the formation of a clustered alloy is not favored. Additionally, a surface-to-bulk photoemission core level transition is observed for the Cs 4d photoemission feature which indicates the electronic structure of the surface is different from the bulk. Time resolved photoluminescence spectroscopy indicates the presence of multiple excitonic decay features which is argued to originate from states residing at surface and bulk environments." @default.
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- W4307998957 date "2022-10-31" @default.
- W4307998957 modified "2023-09-30" @default.
- W4307998957 title "Surface versus Bulk State Transitions in Inkjet-Printed All-Inorganic Perovskite Quantum Dot Films" @default.
- W4307998957 doi "https://doi.org/10.20944/preprints202210.0479.v1" @default.
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