descriptionPublicationkeyboard_double_arrow_right Article 10 Nov 2007 English Publisher:American Chemical Society (ACS)Journal:Journal of the American Chemical Society, volume 129, pages 14,880-14,886 (issn: 0002-7863, eissn: 1520-5126,

Authors: Chin, P.T.K.; de Mello Donega, C.; van Bavel, S.S.; Meskers, S.C.J.; Sommerdijk, N.A.J.M.; Jansen, R.A.J.;

doi: 10.1021/ja0738071

pmid: 17994737

Highly Luminescent CdTe/CdSe Colloidal Heteronanocrystals with Temperature-Dependent Emission Color

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Abstract

In this work we present the preparation of highly luminescent anisotropic CdTe/CdSe colloidal heteronanocrystals. The reaction conditions used (low temperature, slow precursor addition, and surfactant composition) resulted in a tunable shape from prolate to branched CdTe/CdSe nanocrystals. Upon CdSe shell growth the heteronanocrystals show a gradual evolution from type-I to type-II optical behavior. These heteronanocrystals show a remarkably high photoluminescence quantum yield (up to 82%) and negligible thermally induced quenching up to temperatures as high as 373 K.

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