Highly luminescent CdTe/CdSe colloidal heteronanocrystals with temperature-dependent emission color

Article

Chin, P.T.K., Mello Donegá, de, C., Chevtchenko, S.S, Meskers, S.C.J., Sommerdijk, N.A.J.M. & Janssen, R.A.J. (2007). Highly luminescent CdTe/CdSe colloidal heteronanocrystals with temperature-dependent emission color. Journal of the American Chemical Society, 129(48), 14880-14886. In Scopus Cited 132 times.

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Abstract

 

In this work we present the preparation of highly luminescent anisotrophic 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 remarkable high photoluminescence quantum yield (up to 82%) and negligible thermally induced quenching up to temperatures as high as 373 K.