Influence of dopant content on morphology and optical constants of ZnO:Na films by sol-gel method  

作　　者：吕建国 曹春斌 宋学萍 孙兆奇 

机构地区：[1]School of Physics and Material Science,Anhui University [2]Department of Physics and Electronic Engineering,Hefei Normal University [3]School of Sciences,Anhui Agricultural University

出　　处：《Journal of Central South University》2011年第1期42-47,共6页中南大学学报（英文版）

基　　金：Project(50872001) supported by the National Natural Science Foundation of China;Project(20060357003) supported by Research Fund for the Doctoral Program of Higher Education of China;Project(KJ2010A284) supported by the Natural Science Foundation of Anhui Higher Education Institution of China

摘　　要：Undoped and Na-doped ZnO films were deposited by sol-gel method.The effects of sodium incorporation on structure,surface morphology and optical constants of the films were investigated.X-ray diffraction patterns show the hexagonal wurtzite polycrystalline structure and that the sodium incorporation leads to the change in the structural characteristics of ZnO films.The SEM observations show that the surface morphology of the films is affected by the sodium incorporation.The transmission spectra show that the average transmittance of the films is above 85% in the visible range.The absorption edge initially blue-shifts and then red-shifts with the increase of Na doping content.The optical constants of these films were calculated using transmission spectra.Refractive indices of the films in the visible range decrease at first and then increase with increasing Na doping content.Undoped and Na-doped ZnO films were deposited by sol-gel method. The effects of sodium incorporation on structure, surface morphology and optical constants of the films were investigated. X-ray diffraction patterns show the hexagonal wurtzite polycrystalline structure and that the sodium incorporation leads to the change in the structural characteristics of ZnO films. The SEM observations show that the surface morphology of the films is affected by the sodium incorporation. The transmission spectra show that the average transmittance of the films is above 85% in the visible range. The absorption edge initially blue-shifts and then red-shifts with the increase of Na doping content. The optical constants of these films were calculated using transmission spectra. Refractive indices of the films in the visible range decrease at first and then increase with increasing Na doping content.

关 键 词：Na-doped ZnO sol-gel method transmission spectra optical constants 

分 类 号：O484[理学—固体物理]