Silica-coated and annealed CdS nanowires with enhanced photoluminescence

被引：10
作者：
Liang, Shan [1 ]
Li, Min [2 ]
Wang, Jia-Hong [1 ]
Liu, Xiao-Li [1 ]
Hao, Zhong-Hua [1 ]
Zhou, Li [1 ]
Yu, Xue-Feng [1 ]
Wang, Qu-Quan [1 ]
机构：
[1] Wuhan Univ, Sch Phys & Technol, Minist Educ, Key Lab Artificial Micro & Nanostruct, Wuhan 430072, Peoples R China
[2] Jiangsu Normal Univ, Sch Phys & Elect Engn, Xuzhou 221116, Peoples R China
来源：
OPTICS EXPRESS | 2013年 / 21卷 / 03期
基金：
高等学校博士学科点专项科研基金;
关键词：
NANOPARTICLES; LIFETIMES;
D O I：
10.1364/OE.21.003253
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The CdS/SiO2 core/shell nanowires (NWs) with controlled shell thickness were successfully synthesized and subsequently heat-treated at 500 degrees C. The influences of silica shell coating and annealing processes on their optical properties have been investigated. Compared with original CdS NWs, the annealed CdS/SiO2 NWs exhibited an enhanced band-edge emission with slowed photoluminescence lifetime, while the intensity of defect emission decreased. The results were ascribed to the surface passivation and recrystallization by shell coating and annealing. We believe our finding would help improving the optical properties of semiconductor NWs, and facilitate its applications in various realms, such as nanoscale emitter, sensor, and photoelectric device. (C) 2013 Optical Society of America
引用
收藏
页码：3253 / 3258
页数：6
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