Preparation of Highly Luminescent CdTe/CdS Core/Shell Quantum Dots
A good balance: Oil‐soluble CdTe/CdS core/shell quantum dots (QDs) that emit in the visible and near‐infrared spectral regions with quantum yields up to 92 % (see figure) are prepared by balancing the coordinating capacity and the activation effect of selected surfactants. An effective shell‐coating...
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Published in | Chemphyschem Vol. 10; no. 4; pp. 680 - 685 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Weinheim
WILEY-VCH Verlag
09.03.2009
WILEY‐VCH Verlag Wiley |
Subjects | |
Online Access | Get full text |
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Summary: | A good balance: Oil‐soluble CdTe/CdS core/shell quantum dots (QDs) that emit in the visible and near‐infrared spectral regions with quantum yields up to 92 % (see figure) are prepared by balancing the coordinating capacity and the activation effect of selected surfactants.
An effective shell‐coating route is developed for covering oil‐soluble CdTe quantum dots (QDs), which usually tend to aggregate during the heating‐up process involved in shell formation. The new route is based on balancing the coordinating capacity and the activation effect of selected surfactants. The thus obtained highly luminescent CdTe/CdS core/shell QDs exhibit photoluminescence quantum yields as high as 92 %—among the best results obtained so far for luminescent semiconductor nanocrystals. By changing the size of the CdTe core, or the thickness of the CdS shell, the emission colors of the obtained core/shell nanocrystals can be tuned between the visible and near‐infrared regions of the spectrum following an identical procedure.
A good balance: Oil‐soluble CdTe/CdS core/shell quantum dots (QDs) that emit in the visible and near‐infrared spectral regions with quantum yields up to 92 % (see figure) are prepared by balancing the coordinating capacity and the activation effect of selected surfactants. |
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Bibliography: | National Natural Science Foundation istex:0732F28BDF1907A90AACA39A6008477C9316A38B ArticleID:CPHC200800672 Program for New Century Excellent Talents in University ark:/67375/WNG-3FN48G3H-6 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1439-4235 1439-7641 |
DOI: | 10.1002/cphc.200800672 |