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Effect of oxygen partial pressure and transparent substrates on the structural and optical properties of ZnO thin films and their performance in energy harvesters

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Abstract

Zinc oxide (ZnO) thin films were deposited onto different substrates — tin-doped indium oxide (ITO)/glass, ITO/polyethylene naphthalate (PEN), ITO/polyethylene terephthalate (PET) — by the radio-frequency (RF) magnetron sputtering method. The effect of various O2/(Ar+O2) gas flow ratios (0, 0.1, 0.2, 0.3, 0.4, 0.5, and 0.6) was studied in detail. ZnO layers deposited onto ITO/PEN and ITO/PET substrates exhibited a stronger c-axis preferred orientation along the (0002) direction compared to ZnO deposited onto ITO/glass. The transmittance spectra of ZnO films showed that the maximum transmittances of ZnO films deposited onto ITO/glass, ITO/PEN, and ITO/PET substrates were 89.2%, 65.0%, and 77.8%, respectively. Scanning electron microscopy (SEM) images of the film surfaces indicated that the grain was uniform. The cross-sectional SEM images showed that the ZnO films were columnar structures whose c-axis was perpendicular to the film surface. The test results for a fabricated ZnO thin film based energy harvester showed that its output voltage increased with increasing acceleration of external vibration.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (61671017), Anhui Provincial Natural Science Foundation (1508085ME72), and the Provincial Natural Science Foundation of Anhui Higher Education Institution (KJ2016A787).

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Authors and Affiliations

  1. School of Physics & Materials Science, Anhui University, Hefei, 230601, China

    Yan-ping Xia, Pei-hong Wang, Shi-wei Shi, Gang He, Miao Zhang & Zhao-qi Sun

  2. School of Electronic & Information Engineering, Hefei Normal University, Hefei, 230601, China

    Jian-guo Lü

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  1. Yan-ping Xia
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  2. Pei-hong Wang
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  3. Shi-wei Shi
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  4. Gang He
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  7. Zhao-qi Sun
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Correspondence to Pei-hong Wang.

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Xia, Yp., Wang, Ph., Shi, Sw. et al. Effect of oxygen partial pressure and transparent substrates on the structural and optical properties of ZnO thin films and their performance in energy harvesters. Int J Miner Metall Mater 24, 675–680 (2017). https://doi.org/10.1007/s12613-017-1450-1

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  • DOI: https://doi.org/10.1007/s12613-017-1450-1

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