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|Title:||Composition-tunable ZnxCd1-xSe nanocrystals with high luminescence and stability||Authors:||Zhong, Xinhua
White, Timothy John
|Keywords:||DRNTU::Engineering::Materials::Nanostructured materials||Issue Date:||2003||Source:||Zhong, X., Han, M.-Y., Dong, Z. L., White, T. J., & Knoll, W. (2003). Composition-tunable ZnxCd1-xSe nanocrystals with high luminescence and stability. Journal of the American chemical society, 125(28), 8589-8594.||Series/Report no.:||Journal of the American chemical society||Abstract:||High-quality ZnxCd1-xSe nanocrystals have been successfully prepared at high temperature by incorporating stoichiometric amounts of Zn and Se into pre-prepared CdSe nanocrystals. With increasing Zn content, a composition-tunable emission across most of the visible spectrum has been demonstrated by a systematic blue-shift in emission wavelength. The photoluminescence (PL) properties for the obtained ZnxCd1-xSe nanocrystals (PL efficiency of 70−85%, fwhm = 22−30 nm) are comparable to those for the best reported CdSe-based QDs. In particular, they also have good PL properties in the blue spectral range. Moreover, the alloy nanocrystals can retain their high luminescence (PL efficiency of over 40%) when dispersed in aqueous solutions and maintain a symmetric peak shape and spectral position under rigorous experimental conditions. A rapid alloying process was observed at a temperature higher than “alloying point”. The mechanism of the high luminescence efficiency and stability of ZnxCd1-xSe nanocrystals is explored.||URI:||https://hdl.handle.net/10356/94281
|DOI:||10.1021/ja035096m||Rights:||© 2003 American Chemical Society.||Fulltext Permission:||none||Fulltext Availability:||No Fulltext|
|Appears in Collections:||MSE Journal Articles|
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