Significant improvement in dopant emission and lifetime in water soluble Cu:ZnSe/ZnS nanocrystals

被引：2

作者：

Saikia, K. ^{[1
]}

Deb, P. ^{[1
]}

Mondal, B. ^{[2
]}

Kalita, E. ^{[3
]}

机构：

[1] Tezpur Univ, Dept Phys, Cent Univ, Tezpur 784028, India

[2] Indian Assoc Cultivat Sci, Dept Cent Sci Serv, Kolkata 700032, India

[3] Tezpur Univ, Dept Mol Biol & Biotechnol, Cent Univ, Tezpur 784028, India

来源：

MATERIALS RESEARCH EXPRESS | 2014年 / 1卷 / 01期

关键词：

nanocrystals; colloids; photoluminescence; dopant emission; lifetime;

D O I：

10.1088/2053-1591/1/1/015014

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report here the enhanced dopant emission in Cu:ZnSe/ZnS core-shell nanocrystals (NCs) through an aqueous route in ambient conditions. A three-fold quantum enhancement in luminescence has been achieved by developing a ZnS inert shell as compared to the pristine doped NCs. The internal doping of Cu after shell growth, signifying localization of Cu2+ t(2) energy states in the deep band gap, has shown a significant improvement in dopant excited state lifetime. The long lifetime related to Cu dopant emission is the longest lifetime ever reported for copper doped zinc based NCs developed through an aqueous route. The good colloidal as well as the luminescence stability of these highly efficient doped NCs mean they have great potential for use in biomedical imaging applications.

引用

页数：11

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