Structural and optical properties of Ga-doped CdO nanocrystalline thin films

被引：47
作者：
Thambidurai, M. [1 ]
Muthukumarasamy, N. [2 ]
Ranjitha, A. [2 ]
Velauthapillai, Dhayalan [3 ]
机构：
[1] Seoul Natl Univ, Global Frontier Ctr Multiscale Energy Syst, Dept Elect & Comp Engn, Seoul 151744, South Korea
[2] Coimbatore Inst Technol, Dept Phys, Coimbatore, Tamil Nadu, India
[3] Bergen Univ Coll, Fac Engn & Business Adm, Bergen, Norway
来源：
SUPERLATTICES AND MICROSTRUCTURES | 2015年 / 86卷
关键词：
Semiconductor; Thin films; Ga-doped CdO; Sol-gel method; Optical properties; CADMIUM-OXIDE;
D O I：
10.1016/j.spmi.2015.08.020
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
In the present work, a systematic study has been carried out to understand the effect of gallium doping on the various properties of the CdO nanocrystalline thin films. Ga-doped CdO nanocrystalline thin films with different gallium concentrations (0.01 M, 0.03 M, 0.05 M, 0.07 M and 0.09 M) have been synthesized by sol gel method. The X-ray diffraction (XRD) patterns show that the CdO and Ga-doped CdO films exhibit cubic structure. The chemical composition of the Ga-doped CdO films was studied using X-ray photoelectron spectroscopy (XPS). XPS results clearly showed the existence of Ga as a doping element in the CdO crystal lattice. Optical absorption spectra of Ga-doped CdO films shows that absorption edge is slightly shifted toward longer wavelength side (red shift) when compared to that of CdO. The optical band gap of CdO film was found to decrease with increasing Ga-doping concentration. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：559 / 563
页数：5
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