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A high photocurrent gain in UV photodetector based on Cu doped ZnO nanorods on PEN substrate

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Abstract

Vertical well-aligned Cu-doped ZnO nanorods were successfully synthesized by chemical bath deposition (CBD) method on low cost and flexible polyethylene naphthalate (PEN) substrate. The structural and optical investigations exhibited the high quality of the Cu-doped ZnO nanorods on a flexible PEN substrate. The metal-semiconductor-metal (MSM) configuration was used to fabricate UV photodetector based on the Cu-doped ZnO nanorods grown on PEN substrate. Under a 5 V applied bias, the values of dark current and photocurrent of the Cu-doped ZnO nanorods photodetector were 14.9 µA and 3.27 mA, respectively. Meanwhile, calculated photocurrent gain of the UV photodetector was 219 at 5 V bias voltage. Upon exposure to 365 nm UV light, the UV device exhibited fast response time and recovery time of 0.317 and 0.212 s, respectively, at a bias voltage of 5 V.

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Acknowledgements

The author gratefully acknowledges the financial support of Babol University of Technology.

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  1. Department of Physics, College of Science, Babol Noshirvani University of Technology, Babol, Iran

    Reza Shabannia

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Shabannia, R. A high photocurrent gain in UV photodetector based on Cu doped ZnO nanorods on PEN substrate. J Mater Sci: Mater Electron 29, 11646–11652 (2018). https://doi.org/10.1007/s10854-018-9262-2

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