Effect of preheating temperature on structural and optical properties of ZnO thin films by sol-gel process

被引：342
|
作者：
Kim, YS [1 ]
Tai, WP
Shu, SJ
机构：
[1] Sungkyunkwan Univ, Adv Mat Proc Informat Technol, Suwon 440746, South Korea
[2] Inha Univ, Inst Adv Mat, Inchon 402751, South Korea
来源：
THIN SOLID FILMS | 2005年 / 491卷 / 1-2期
关键词：
zinc oxide; sol-gel process; optical properties; photoluminescence;
D O I：
10.1016/j.tsf.2005.06.013
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
ZnO thin films are prepared on glass substrate by sol-gel spin-coating method and the effect of preheating temperature on c-axis preferred orientation and optical properties of the films are investigated. The ZnO thin film that was preheated at 275 degrees C and post-heated at 650 degrees C using a sol with Zn concentration of 0.7 mol/l is highly oriented along the (002) plane. The transmittances of ZnO thin films preheated at 200-300 degrees C and post-heated at 650 degrees C are over 85% in visible range and exhibit absorption edges at about 368 nm. The optical band gap energy is evaluated to be 3.24 similar to 3.26 eV. The photoluminescence shows the ultraviolet emission at near band edge and broad green-yellow radiation at 490 similar to 620 nm. The effect of preheating temperature on structural and optical properties of ZnO thin films is discussed. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：153 / 160
页数：8
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