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Effect of solution concentration on surface morphology, chemical composition and photoresponse of CuO/Cu2O composite thin films grown by hydrothermal synthesis

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Abstract

Crystal structure, surface morphology, surface chemical composition and photocurrent response curves of the thin films were investigated by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy and electrochemical workstation. The results show that the composite thin films are composed of CuO and Cu2O phase. The relative content of copper (I) oxide on the composite thin films increases with the increase of solution concentration. Leaf-like CuO particles have been observed on the thin film grown in the 0.5 mol/L solution. Some regular octahedral and truncated octahedral Cu2O particles have been observed on the surface of thin films grown in the 0.6 and 0.8 mol/L solution, respectively. The best photocurrent response and the fastest growth and decay have been observed in the thin film grown in 0.6 mol/L solution.

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Acknowledgments

This work was supported by State Key Program for Basic Research of China (2013CB632705), National Natural Science Foundation of China (Nos. 11334008, 61290301, 51072001, 51272001, 51002156, 51102072), China Postdoctoral Science Foundation (No. 2012M520944), Natural Science Foundation of Anhui Higher Education Institution of China (No. KJ2012Z336), Shanghai Postdoctoral Science Foundation (No. 12R21416800), Funds for “136” Talent of Hefei Normal University (No. 2014136KJB03).

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Authors and Affiliations

  1. School of Electronic and Information Engineering, Hefei Normal University, Hefei, 230601, China

    Min Zhao, Fengjiao Shang, Ying Song, Feng Wang, Zhitao Zhou, Jianguo Lv, Zhenfa Zi & Yiyong Wei

  2. National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai, 200083, China

    Jianguo Lv & Xiaoshuang Chen

  3. School of Physics and Material Science, Anhui University, Hefei, 230039, China

    Jianguo Lv, Gang He, Miao Zhang, Xueping Song & Zhaoqi Sun

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  1. Min Zhao
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  2. Fengjiao Shang
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  4. Feng Wang
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Correspondence to Jianguo Lv, Xiaoshuang Chen or Zhaoqi Sun.

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Zhao, M., Shang, F., Song, Y. et al. Effect of solution concentration on surface morphology, chemical composition and photoresponse of CuO/Cu2O composite thin films grown by hydrothermal synthesis. J Mater Sci: Mater Electron 25, 4877–4882 (2014). https://doi.org/10.1007/s10854-014-2247-x

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  • DOI: https://doi.org/10.1007/s10854-014-2247-x

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