Synthesis and characterization of flower-like CuIn_{1鈭?span style='font-style: italic'>x}Ga_xS₂ (x = 0.3) microspheres

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• 作者：Jiasong Zhong^a ; Weidong Xiang^a ; ^b ; ^{xiangweidong001@126.com} ; Yinsheng Zhao^a ; Qian Cai^b ; Yun Wang^b ; Jing Wang^a ; Hailong Yang^a ; Xiaojuan Liang^b
• 关键词：A. Semiconductors ; B. Chemical synthesis ; C. Raman spectroscopy ; D. Optical properties
• 刊名：Materials Research Bulletin
• 出版年：2012
• 期刊代码：60_00255408
• 类别：ms
• 出版时间：March, 2012
• 卷：47
• 期：3
• 页码：861-866
• 文件大小：1254 K

摘要

We report the formation and characterization of the flower-like CuIn_1鈭?em>xGa_xS₂ (x = 0.3) microspheres using CuCl₂路2H₂O, GaCl₃, InCl₃ and l-cystine in the mixed solvent of ethylene glycol and distilled water (1:2, v/v) at 200 掳C for 24 h. XRD results indicated that the CuIn_0.7Ga_0.3S₂ nanostructures have a (1 1 2) preferred orientation. The EDS and XPS analyses of the sample revealed that Cu, In, Ga and S were present in an atomic ratio of approximately 1:0.7:0.3:2. FESEM and TEM images showed that the product was microspheres, consisting of nanoplates with the thickness of about 20 nm. The optical properties were investigated by ultraviolet-visible (UV-vis) absorption spectroscopy and Raman spectroscopy. UV-vis absorption spectrum indicated that the band gap of as-synthesized flower-like CuIn_0.7Ga_0.3S₂ microspheres was about 2.427 eV. Raman spectrum of the obtained CuIn_0.7Ga_0.3S₂ exhibited a high-intensity peak at 302 cm^鈭? could be assigned as A1-mode.