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不同气氛下ZnO薄膜的准分子激光辐照效应

Effect of Excimer Laser Irradiation for ZnO Thin Films under Different Atmospheres

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摘要

研究了不同气氛下(空气、氧气和氮气)248 nm准分子激光辐照对ZnO薄膜光致发光谱和电学性质的影响;采用高斯线形对不同气氛下激光辐照ZnO薄膜的光致发光谱进行了拟合,并对位于3.31、3.28、3.247、3.1 eV附近的发光峰进行了归属指认和机理分析。激光辐照ZnO薄膜导致紫外光致发光峰强度明显下降并伴有少量红移,并且使得位于3.274 eV的一级声子伴线(D0X-1LO)发射峰和位于3.203 eV的二级声子伴线(D0X-2LO)发射峰合并形成一个峰。富氧条件下激光辐照ZnO薄膜会造成受主浓度增加,施主浓度减少;而缺氧条件下激光辐照ZnO薄膜会造成受主浓度减少,施主浓度增加。激光辐照后ZnO薄膜的载流子浓度上升了2个数量级,载流子迁移率上升了1个数量级,电阻率下降了3个数量级。

Abstract

The effect of 248 nm excimer laser irradiation on the photoluminescence and electrical properties of ZnO thin films under different atmospheres (air, oxygen and nitrogen) is investigated. Based on Gaussian curve, the photoluminescence spectra of ZnO thin films irradiated by laser under different atmospheres are fitted, and the photoluminescence peaks around 3.31, 3.28, 3.247, 3.1 eV are assigned and analyzed in mechanism. After laser irradiation, ultraviolet (UV) emission is obviously lower and shows a little red-shift, while D0X-1LO and D0X-2LO transitions merges into one peak. After laser irradiation under oxygen rich atmosphere, the acceptor density of ZnO thin films increases, and the donor density decreases. After laser irradiation under oxygen deficiency atmosphere, the acceptor density of ZnO thin films decreases, and the donor density increases. After laser irradiation, the resistivity of ZnO thin films is decreased by three orders of magnitude, carrier concentration is increased by two orders of magnitude, and carrier mobility is increased by one orders of magnitude.

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中图分类号:TN249

DOI:10.3788/cjl201441.0207001

所属栏目:材料与薄膜

责任编辑:韩峰  信息反馈

基金项目:国家自然科学基金(51005005)、北京市教育委员会科技计划重点项目(KZ201210005004)

收稿日期:2013-07-10

修改稿日期:2013-09-13

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曾勇:北京工业大学激光工程研究院, 北京 100124
赵艳:北京工业大学激光工程研究院, 北京 100124
蒋毅坚:北京工业大学激光工程研究院, 北京 100124

联系人作者:曾勇(watnd@emails.bjut.edu.cn)

备注:曾勇(1987—),男,博士研究生,主要从事激光辐照改变功能材料物理性质方面的研究。

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引用该论文

Zeng Yong,Zhao Yan,Jiang Yijian. Effect of Excimer Laser Irradiation for ZnO Thin Films under Different Atmospheres[J]. Chinese Journal of Lasers, 2014, 41(2): 0207001

曾勇,赵艳,蒋毅坚. 不同气氛下ZnO薄膜的准分子激光辐照效应[J]. 中国激光, 2014, 41(2): 0207001

被引情况

【1】靳羽华,赵艳,蒋毅坚. 准分子激光微透镜整形均束装置. 中国激光, 2015, 42(6): 602003--1

【2】邵景珍,王 玺,胡红涛,方晓东. 氧化锌薄膜的准分子激光退火热效应模拟分析. 激光与光电子学进展, 2017, 54(6): 61401--1

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