High efficiency photoluminescence from silica-coated CdSe quantum dots

High efficiency photoluminescence from silica-coated CdSe quantum dots

The effects on the luminescent properties of coating CdSe quantum dots with silica are presented. Coating increased the quantum yields from ∼ 10 % - 20 % to ∼ 80 % at a maximum. The changes in quantum yields and photoluminescence peak at wavelength were discussed in terms of the effects of surface c...

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Bibliographic Details
Published in:Applied physics letters Vol. 94; no. 7; pp. 073112 - 073112-3
Main Authors: Qian, Lei, Bera, Debasis, Tseng, Teng-Kuan, Holloway, Paul H.
Format: Journal Article
Language:English
Published: American Institute of Physics 16-02-2009
Online Access:Get full text
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Summary:The effects on the luminescent properties of coating CdSe quantum dots with silica are presented. Coating increased the quantum yields from ∼ 10 % - 20 % to ∼ 80 % at a maximum. The changes in quantum yields and photoluminescence peak at wavelength were discussed in terms of the effects of surface charge. By neutralizing surface charge, the emission from CdSe quantum dots was initially blueshifted followed by redshifting, and the quantum yield increased dramatically.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3085968