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Highly luminescent water-soluble CdTe quantum dots

By SF Wuister, A.N. Swart, F van Driel, SG Hickey, CD Donega and Ingmar Swart

Abstract

Colloidal CdTe quantum dots prepared in TOP/DDA (trioctylphosphine/dodecylamine) are transferred into water by the use of aminoethanethiol.HCl (AET) or mercaptopropionic acid (MPA). This results in an increase in the photoluminescence quantum efficiency and a longer exciton lifetime. For the first time, water-soluble semiconductor nanocrystals presenting simultaneously high band-edge photoluminescence quantum efficiencies (as high as 60% at room temperature), monoexponential exciton decays, and no observable defect-related emission are obtained

Topics: CDSE NANOCRYSTALS, SEMICONDUCTOR NANOCRYSTALS, STABILIZED CDSE, CLUSTERS, ROUTES, YIELD
Year: 2003
OAI identifier: oai:dspace.library.uu.nl:1874/25791
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