Influences of CO2 laser irradiation on the structure and photoluminescence of zinc oxide thin films

被引:8
|
作者
Hong, RJ [1 ]
Wei, CY
He, HB
Fan, ZX
Shao, JD
机构
[1] Shanghai Inst Opt & Fine Mech, Res & Dev Ctr Opt Thin Film Coatings, Shanghai 201800, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing 100864, Peoples R China
关键词
zinc oxide; laser irradiation; structural properties; luminescence;
D O I
10.1016/j.tsf.2005.03.012
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
CO2 laser irradiation experiments on ZnO thin films are reported. The structural, optical, luminescent and vibrational properties of the samples were investigated by X-ray diffraction (XRD), transmittance, photoluminescence (PL) and Raman measurements. XRD results show that the crystalline of the irradiated films was improved. The (002) peaks of irradiated ZnO films shift to. higher 20 angles due to the stress relaxation in the case of laser beam irradiation. From optical transmittance spectra, all films exhibit high transmittance in the visible range, the optical band edge of irradiated films showed a redshift compared with that of as-grown films. Compared with the as-grown films, the photoluminescence emission (in particular the relative intensities of visible emissions) intensities of irradiated samples enhanced. In the Raman scattering spectral both the A I. and E modes exhibited slight Raman blueshift. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:262 / 266
页数:5
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