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

P.T.K. Chin, C. Mello Donegá, de, S.S Chevtchenko, S.C.J. Meskers, N.A.J.M. Sommerdijk, R.A.J. Janssen

Research output: Contribution to journalArticleAcademicpeer-review

153 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)14880-14886
JournalJournal of the American Chemical Society
Volume129
Issue number48
DOIs
Publication statusPublished - 2007

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