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GLAD synthesized ZnO nanoparticles decorated CuO thin film for high performance UV detection

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Abstract

ZnO nanoparticles (NPs) (0-D) were decorated on the surface of Cu2O thin film (TF) (2-D) by using a catalytic free and well-controlled technique called glancing angle deposition (GLAD). A complete phase transformation from Cu2O to CuO and enhancement in ZnO crystallinity was observed after annealing ZnO NPs/Cu2O TF in air at 400 °C. The photodetector (PD) based on ZnO NPs/CuO TF showed good photoelectric parameters in ultraviolet (UV) and also in visible regions. The fabricated PD showed a low dark current of ~ 9.30 nA at − 1 V applied bias and a high photoresponse of ~ 20 due to enhanced built-in potential between the 0-D ZnO NPs on the surface of 2-D CuO TF. Moreover, the PD showed a high responsivity (Rλ) of ~ 3.11 A/W, detectivity (D*) of ~ 4.97 × 1012 Jones and NEP as low as ~ 6.75 × 10–13 W under UV-C light. Furthermore, the device showed a stable and fast device response with rise and fall times of 1.85 ms and 2.59 ms respectivily. Thus, the fabricated ZnO NPs/CuO TF device can be a suitable applicant for the next-generation optoelectronic devices.

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Acknowledgements

We would like to thank the SERB (DST) project (EMR/2017/001863), Govt. Of India for providing fabrication facilities and funding for this project. NCPRE, IIT Bombay and CSIR-NEIST Jorhat for FE-SEM and XPS analysis, India. The authors wish to thank Dr. David Singh, Department of Chemistry, NIT Manipur for PL and XRD analysis, NIT Nagaland for I-V characteristics and other facilities.

Funding

This work was funded by SERB Department Science and Technology, EMR/2017/001863.

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  1. Department of Electronics and Communication Engineering, National Institute of Technology Nagaland, Dimapur, Nagaland, 797103, India

    Sudem Daimary, Palepu Ashok & Jay Chandra Dhar

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Daimary, S., Ashok, P. & Dhar, J.C. GLAD synthesized ZnO nanoparticles decorated CuO thin film for high performance UV detection. J Mater Sci: Mater Electron 35, 413 (2024). https://doi.org/10.1007/s10854-024-12194-3

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