Citation: GU Min, CHEN Ying-Long, WU Ya-Zhen. Preparation and Optical Properties of CuO-SiO₂ and Cu₂O-SiO₂ Films[J]. Chinese Journal of Inorganic Chemistry, ;2017, 33(4): 576-582. doi: 10.11862/CJIC.2017.077 shu

Preparation and Optical Properties of CuO-SiO₂ and Cu₂O-SiO₂ Films

State Key Laboratory of Coal Mine Disaster Dynamics and Control, College of Resources and Environmental Science, Chongqing University, Chongqing 400044, China

Corresponding author: GU Min, mgu@cqu.edu.cn
Received Date: 4 August 2016
Revised Date: 3 January 2017

Figures(7)

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.
- electrochemical-sol-gel,
- thermal treatment,
- copper oxide-silicon dioxide,
- cuprous oxide-silicon dioxide,
- composite film,
- optical band gap,
- third-order nonlinear optical property
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Preparation and Optical Properties of CuO-SiO₂ and Cu₂O-SiO₂ Films