Optical properties of undoped and Mn2+-doped CdS nanocrystals in polymer

被引：35

作者：

Tanaka, M ^{[1
]}

Qi, JF ^{[1
]}

Masumoto, Y ^{[1
]}

机构：

[1] Japan Sci & Technol Corp, ERATO, Single Quantum Dot Project, Tsukuba Res Consortium, Tsukuba, Ibaraki 3002635, Japan

来源：

JOURNAL OF CRYSTAL GROWTH | 2000年 / 214卷

关键词：

CdS nanocrystals; Mn2+; luminescence decay; temperature quenching;

D O I：

10.1016/S0022-0248(00)00119-6

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

We prepare a polyvinyl alcohol film containing undoped and Mn2+-doped CdS nanocrystals by a chemical method, and investigate the photoluminescence properties. The luminescence of Mn2+ of this sample shows long decay times of about 1.1 and 0.2 ms. unlike the previous report on ZnS:Mn2+ nanocrystals. Under the interband excitation, the temperature quenching of the Mn2+ luminescence is found to be remarkably weak in comparison with the bulk crystals of CdS:Mn2+. Probable causes of this difference are discussed in terms of the electron-hole pair (or exciton)-phonon interaction and the thermally induced dissociation of the electron-hole pair. Further, we measure site-selective luminescence spectra and discuss the origin of the green luminescence of the undoped CdS nanocrystals. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：410 / 414

页数：5

共 12 条

[1] Doped nanocrystalline materials - Physics and applications [J].