Emission characteristics of diameter controlled SnO2 nanowires

被引:13
作者
Lee, S. Y. [1 ,2 ]
Shin, Y. H. [1 ,2 ]
Kim, Yongmin [1 ,2 ]
Kim, Sangdan [3 ]
Ju, Sanghyun [3 ]
机构
[1] Dankook Univ, Dept Appl Phys, Yongin 448701, South Korea
[2] Dankook Univ, Inst Nanosensors & Biotechnol, Yongin 448701, South Korea
[3] Kyonggi Univ, Dept Phys, Suwon 443760, South Korea
基金
新加坡国家研究基金会;
关键词
SnO2; Nanowires; Diameter; Surface/volume ratio; Luminescence; ZNO; PHOTOLUMINESCENCE; TRANSPORT;
D O I
10.1016/j.jlumin.2011.05.054
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
SnO2 nanowires with controlled diameters were grown by chemical vapor deposition process for which four different diameters ranging from 50 to 140 nm were grown by the controlling thickness of gold-thin-films as catalysts. The influence of the diameter-to-thickness ratio as well as the mechanism of its formation was studied. The relationship between photoluminescence intensities and aspect ratio with considering surface effects of SnO2 nanowires was also investigated. The room temperature luminescence intensity was diminished with decreasing the diameter of nanowires due to the increasing surface/volume ratio. The transition energy and emission intensity show abnormal behavior as temperature decreased from room temperature to 5 K. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码:2565 / 2568
页数:4
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