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Composition-tunable ZnxCd1-xSe nanocrystals with high luminescence and stability

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Composition-tunable ZnxCd1-xSe nanocrystals with high luminescence and stability

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dc.contributor.author Zhong, Xinhua
dc.contributor.author Han, Ming-Yong
dc.contributor.author Dong, Zhili
dc.contributor.author White, Timothy John
dc.contributor.author Knoll, Wolfgang
dc.date.accessioned 2012-01-06T02:56:08Z
dc.date.available 2012-01-06T02:56:08Z
dc.date.copyright 2003
dc.date.issued 2012-01-06
dc.identifier.citation 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.
dc.identifier.uri http://hdl.handle.net/10220/7438
dc.description.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.
dc.language.iso en
dc.relation.ispartofseries Journal of the American chemical society
dc.rights © 2003 American Chemical Society.
dc.subject DRNTU::Engineering::Materials::Nanostructured materials.
dc.title Composition-tunable ZnxCd1-xSe nanocrystals with high luminescence and stability
dc.type Journal Article
dc.contributor.school School of Materials Science and Engineering
dc.identifier.doi http://dx.doi.org/10.1021/ja035096m

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