Effect of aging time on the optical, structural and photoluminescence properties of nanocrystalline ZnO films prepared by a sol-gel method

被引：21

作者：

Ibrahim, N. B. ^{[1
]}

AL-Shomar, S. M. ^{[1
]}

Ahmad, Sahrim Hj. ^{[1
]}

机构：

[1] Univ Kebangsaan Malaysia, Fac Sci & Technol, Sch Appl Phys, Bangi Selangor 43600, Malaysia

来源：

APPLIED SURFACE SCIENCE | 2013年 / 283卷

关键词：

Zinc oxide; Photoluminescence; Sol-gel; ZINC-OXIDE FILMS; LUMINESCENCE; DEPOSITION;

D O I：

10.1016/j.apsusc.2013.06.155

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The nanocrystalline zinc oxide (ZnO) films were deposited by a sol-gel method and the effect of sol aging time 0, 1, 7 and 11 days on the structural, optical and photoluminescence properties were investigated. X-ray diffraction analysis showed that the deposited films were polycrystalline with hexagonal wurtzite structure and high orientation along c-axis direction. The grain size was in the range of 42-60 nm increased with sol aging time also the thickness increased from 70 to 147 nm with the aging time increment. The roughness of ZnO film investigated by atomic force microscope showed that roughness of the films increased then decreased with the increment of the aging time. The deposited films are highly transparent with an average transmission exceeding 82-95% in the visible range (400-800 nm), which slightly improved with aging time. The measured optical band gap values of the ZnO films were between 3.1 eV and 3.6 eV. The photoluminescence intensity increased with the aging time and the ZnO films have ultraviolet, violet and green emission. (c) 2013 Elsevier B.V. All rights reserved.

引用

页码：599 / 602

页数：4

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