| CuO-SiO2和Cu2O-SiO2薄膜的制备及其光学性能 |
| Preparation and Optical Properties of CuO-SiO2 and Cu2O-SiO2 Films |
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| 摘要: 以CuSO4·5H2O和正硅酸乙酯为前驱体，配制了稳定透明的Cu2+-SiO2复合溶胶电解液。采用电化学-溶胶凝胶方法，在恒电位-0.9 V下得到Cu-SiO2复合膜，该复合薄膜分别在250和450℃的热处理后得到Cu2O-SiO2和CuO-SiO2复合薄膜。采用XRD、SEM/EDX和台阶仪表征了复合薄膜的组成、形貌和厚度；采用紫外-可见光谱和Z扫描技术研究了复合薄膜的线性和三阶非线性光学性能。结果表明Cu2O-SiO2和CuO-SiO2复合薄膜中的Cu含量、Cu的形态（如Cu2O、CuO）及Cu2O或CuO颗粒大小影响薄膜的光学带隙和三阶非线性光学性能，2种薄膜的光学带隙分别是2.67和2.54 eV，三阶非线性极化率χ（3）分别为2.31×10-6和1.36×10-6 esu。 |
| 关键词: 电化学-溶胶凝胶 热处理 氧化铜-二氧化硅 氧化亚铜-二氧化硅 复合薄膜 光学带隙 三阶非线性光学 |
| 基金项目: 国家重点基础研究发展规划项目（No.2014CB239204）和煤矿灾害动力学与控制国家重点实验室自主项目（No.2011DA105287-ZD201202）资助。 |
| Abstract: The Cu-SiO2 composite films were first prepared by electrochemical sol-gel method at -0.9 V from Cu2+-SiO2 tranparent composite sol which was prepared by using CuSO4·5H2O and tetraethoxysilane as precursors. Then, Cu-SiO2 composite films were transformed into Cu2O-SiO2 and CuO-SiO2 composite films by thermal treatment at 250 and 450℃, respectively. The compostion, morphology and thickness of the two composited films were characterized by X-ray diffraction (XRD) and scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDX) and step profiler, respectively. In addition, the linear and nonlinear optical properties were measured by using UV-Vis spectrum and Z-scan methods. It was found that the optical properties of these composite films were influenced by the Cu content, the forms of Cu element (i.e. CuO or Cu2O) and particle size of CuO or Cu2O in the films. The optical band gaps of Cu2O-SiO2 and CuO-SiO2 composite films were respectively 2.67 and 2.54 eV, and the third-order nonlinear susceptibilities (χ(3)) were 2.31×10-6 and 1.36×10-6 esu, respectively. |
| Keywords: electrochemical-sol-gel thermal treatment copper oxide-silicon dioxide cuprous oxide-silicon dioxide composite film optical band gap third-order nonlinear optical property |
| 投稿时间：2016-08-04 修订日期：2017-01-03 |
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| 辜敏,陈应龙,吴亚珍.CuO-SiO2和Cu2O-SiO2薄膜的制备及其光学性能[J].无机化学学报,2017,33(4):576-582. |
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