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- W2295599135 abstract "Abstract We have investigated the chemical state of In(Zn)P/ZnS core/shell nanocrystals (NCs) for color conversion applications using hard X-ray absorption spectroscopy (XAS) and photoluminescence excitation (PLE). Analyses of the edge energies as well as the X-ray absorption fine structure (XAFS) reveal that the Zn 2+ ions from ZnS remain in the shell while the S 2− ions penetrate into the core at an early stage of the ZnS deposition. It is further demonstrated that for short growth times, the ZnS shell coverage on the core was incomplete, whereas the coverage improved gradually as the shell deposition time increased. Together with evidence from PLE spectra, where there is a strong indication of the presence of P vacancies, this suggests that the core-shell interface in the In(Zn)P/ZnS NCs are subject to substantial atomic exchanges and detailed models for the shell structure beyond simple layer coverage are needed. This substantial atomic exchange is very likely to be the reason for the improved photoluminescence behavior of the core-shell particles compare to In(Zn)P-only NCs as S can passivate the NCs surfaces." @default.
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- W2295599135 date "2016-03-14" @default.
- W2295599135 modified "2023-10-17" @default.
- W2295599135 title "The role of ion exchange in the passivation of In(Zn)P nanocrystals with ZnS" @default.
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- W2295599135 doi "https://doi.org/10.1038/srep22818" @default.
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