Blue-light luminescence enhancement and increased band gap from calcium-doped zinc oxide nanoparticle films

被引：40
作者：
Srivastava, Anchal [1 ]
Kumar, Nishant [1 ]
Misra, Kamakhya Prakash [1 ]
Khare, Sanjay [1 ]
机构：
[1] Univ Lucknow, Dept Phys, Lucknow 226007, Uttar Pradesh, India
来源：
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING | 2014年 / 26卷
关键词：
Thin films; ZnO; Ca-dopant; Sol-gel; Band gap tuning and blue-luminescence; ZNO THIN-FILMS; EMITTING-DIODES; UV EMISSION; PHOTOLUMINESCENCE; FABRICATION; THICKNESS; GROWTH;
D O I：
10.1016/j.mssp.2014.05.001
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Four-fold enhancement in emission in the blue region is observed for the first time from sol-gel deposited calcium doped zinc oxide (Zn1-xCaxO) nanophosphor films having a hexagonal wurtzite structure. A 4.28% increase in the band gap has been obtained by introducing very small concentration (1.47 at%) of Ca dopant. A blue-shift of 55 meV in PL emission in UV region occurs with increase in dopant concentration. Optical transmission, FTIR spectra and surface structure of the films have been studied. Dopant concentration in the films is determined by EDX. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：259 / 266
页数：8
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