Photoluminescence from screen printed ZnO based nanocrystalline films

被引：22
作者：
Srivastava, A. [1 ]
Shukla, R. K. [1 ]
Misra, K. P. [1 ]
机构：
[1] Univ Lucknow, Dept Phys, Lucknow 226007, Uttar Pradesh, India
来源：
CRYSTAL RESEARCH AND TECHNOLOGY | 2011年 / 46卷 / 09期
关键词：
green luminescence; ZnO; Ca doping; screen printing; THIN-FILMS; GREEN PHOTOLUMINESCENCE; EMISSION; LUMINESCENCE; ENHANCEMENT;
D O I：
10.1002/crat.201100155
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
Photoluminescence from ZnO based films deposited by screen printing is studied. PL spectra of undoped films show strong broad green emission around 500 nm and a weak (nearly one fourth of visible) UV emission around 398 nm. Further enhancement of 30% in the green emission is observed as 5 at.% Ca is doped in ZnO which for higher dopant concentration falls monotonously. The films are polycrystalline and the particle size lies between 33 to 47 nm as determined by Debye-Scherrer method. Film with 5 at.% doping is under tensile strain and the others are under compressive strain. SEM shows microclusters, consisting of nanoparticles, scattered throughout the substrate which club together with increase in dopant amount. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
引用
收藏
页码：949 / 955
页数：7
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