Optical properties of ZnS-CdS alloy quantum dots prepared by a colloidal method

被引：22

作者：

Tomihira, K ^{[1
]}

Kim, D ^{[1
]}

Nakayama, M ^{[1
]}

机构：

[1] Osaka City Univ, Grad Sch Engn, Dept Appl Phys, Sumiyoshi Ku, Osaka 5588585, Japan

来源：

JOURNAL OF LUMINESCENCE | 2005年 / 112卷 / 1-4期

关键词：

quantum dot; colloidal method; luminescence; photoetching;

D O I：

10.1016/j.jlumin.2004.09.011

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We have investigated optical properties of ZnS-CdS alloy (Zn1-xCdxS) quantum dots (QDs) prepared by a colloidal method. We succeeded in the preparation of Zn1-xCdxS QDs for all alloy compositions of x between 0 and 1. Furthermore, the reduction of the size-distribution width was achieved by using a size-selective photoetching treatment. The intensity of the band-edge luminescence was remarkably increased by modifying the surface with a Cd(OH)(2) layer. The surface modification also causes drastic changes of decay profiles of the band-edge luminescence, reflecting considerable suppression of nonradiative decay processes. These results clearly demonstrate the success in the preparation of the size- and surface-controlled Zn1-xCdxS QDs. (c) 2004 Elsevier B.V. All rights reserved.

引用

页码：131 / 135

页数：5

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