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