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