Toward efficient blue-emitting thiol-capped Zn1-xCdxSe nanocrystals

被引：34

作者：

Lesnyak, Vladimir ^{[1
]}

Plotnikov, Alexei ^{[2
]}

Gaponik, Nikolai ^{[1
]}

Eychmueller, Alexander ^{[1
]}

机构：

[1] Tech Univ Dresden, D-01062 Dresden, Germany

[2] Hahn Meitner Inst Berlin GmbH, D-14109 Berlin, Germany

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2008年 / 18卷 / 42期

关键词：

D O I：

10.1039/b811859k

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In order to explore synthetic approaches to strongly emitting nanoparticles covering the UV-blue spectral region, the photochemical treatment of ZnSe and Zn(1-x)Cd(x)Se nanocrystals (NCs) capped by thioglycolic acid (TGA) in the presence of Zn(2+) and Cd(2+) ions was investigated. A reproducible method of tuning the luminescence of these NCs from the UV to the blue spectral region was developed. Using this method, stable aqueous NCs emitting in the visible region with photoluminescence (PL) maxima ranging from 390 to 460 nm and with photoluminescence quantum efficiencies (PL QEs) of 20-30% were obtained. The effects of the experimental conditions and of the initial composition of the NCs on their optical properties are discussed.

引用

收藏

页码：5142 / 5146

页数：5

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