Effect of precursor molar ratio of [S2-]/[Zn2+] on particle size and photoluminescence of ZnS: Mn2+ nanocrystals

被引：10
作者：
Dong Dong-Qing
Li Lan [1 ]
Zhang Xiao-Song
Han Xu
An Hai-Ping
机构：
[1] Tianjin Univ Technol, Inst Mat Phys, Tianjin 300384, Peoples R China
[2] Tianjin Univ Technol, Tianjin Key Lab Optoelect Mat & Devices, Tianjin 300384, Peoples R China
[3] Nankai Univ, Inst Modern Opt, Tianjin 300071, Peoples R China
来源：
CHINESE PHYSICS LETTERS | 2007年 / 24卷 / 09期
关键词：
D O I：
10.1088/0256-307X/24/9/055
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We investigate the influence of precursor molar ratio of [S2-]/[Zn2+] on particle size and photoluminescence (PL) of ZnS:Mn2+ nanocrystals. By changing the [S2-]/[Zn2+] ratio from 0.6 (Zn-rich) to 2.0 (S-rich), the particle size increases from nearly 2.7 nm to about 4.0 nm. The increase in the ratio of [S2-]/[Zn2+] causes a decrease of PL emission intensity of ZnS host while a distinct increase of Mn2+ emission. The maximum intensity for the luminescence of Mn2+ emission is observed at the ratio of [S2-]/[Zn2+] approximate to 1.5. The possible mechanism for the results is discussed by filling of S2- vacancies and the increase of Mn2+ ions incorporated into ZnS lattices.
引用
收藏
页码：2661 / 2663
页数：3
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