Enhanced violet emission from ZnS nanowires annealed in an oxygen atmosphere

被引：31
|
作者：
Park, Sunghoon [1 ]
Jin, Changhyun [1 ]
Kim, Hyunsu [1 ]
Hong, Chanseok [1 ]
Lee, Chongmu [1 ]
机构：
[1] Inha Univ, Dept Mat Sci & Engn, Inchon 402751, South Korea
来源：
JOURNAL OF LUMINESCENCE | 2012年 / 132卷 / 01期
基金：
新加坡国家研究基金会;
关键词：
ZnS nanowires; Annealing; Energy dispersive X-ray spectroscopy; X-ray photoelectron emission spectroscopy; Photoluminescence spectroscopy; THERMAL EVAPORATION; FIELD-EMISSION; LUMINESCENCE; GROWTH; PHOTOLUMINESCENCE; FABRICATION; NANOBELTS; PHOSPHORS; STATES; GOLD;
D O I：
10.1016/j.jlumin.2011.08.029
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The influence of thermal annealing in an oxygen atmosphere on the photoluminescence properties of ZnS nanowires has been investigated. ZnS nanowires with the diameters of a few tens of nanometers and the lengths of a few hundreds of micrometers were synthesized by thermal evaporation of ZnS powders on Au-coated Si substrates. The ZnS nanowires had an emission band centered at approximately 430 nm in the violet region. The intensity of the violet emission was enhanced significantly by annealing the ZnS nanowires at 500 degrees C in an oxygen atmosphere for 45 min. The possible sources for the violet emission enhancement by annealing in an O-2 atmosphere are as follows: (1) the Zn2+ vacancies formed in the nanowires. (2) the oxygen impurity atoms, which have diffused from the O-2 annealing atmosphere into the nanowires. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：231 / 235
页数：5
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