Highly luminescent CdTe/CdSe colloidal heteronanocrystals with temperature-dependent emission color |
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| Authors: | Chin Patrick T K Donega Celso de Mello van Bavel Svetlana S Meskers Stefan C J Sommerdijk Nico A J M Janssen René A J |
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| Institution: | Molecular Materials and Nanosystems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands. |
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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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