Brighter glow in ZnS nanocrystals with polarized light

被引：4

作者：

Chawla, Santa ^{[1
]}

Karar, N. ^{[1
]}

Chander, Harish ^{[1
]}

机构：

[1] Natl Phys Lab, New Delhi 110012, India

来源：

SUPERLATTICES AND MICROSTRUCTURES | 2008年 / 43卷 / 02期

关键词：

optical properties of nanocrystals; photoluminescence; polarized light; luminescence enhancement;

D O I：

10.1016/j.spmi.2007.07.034

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

No known reports exist on luminescence enhancement under polarized light excitation. In this Study, ZnS nanocrystals have been observed to produce brighter luminescence when excited by polarized light. ZnS:Mn bulk and nanocrystals have shown fivefold to tenfold increase in photoluminescence (PL) intensity when excited with linearly polarized light at 305 nm and 340 nm. Luminescence enhancement to a lesser degree was observed with linearly polarized light excitation for ZnS:Cu, Al and ZnS:Ag, Al nanocrystals. The observations suggest emission intensity dependence on the degree of anisotropy. which Could be correlated mainly with the symmetry of the luminescence center and also to a lesser extent with nanoparticle shape asymmetry. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：132 / 140

页数：9

共 11 条

[1] OPTICAL-PROPERTIES OF MANGANESE-DOPED NANOCRYSTALS OF ZNS [J].