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Enhanced UV photodetection characteristics of annealed Gd2O3 nanorods

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Abstract

In this study, gadolinium oxide nanorods (Gd2O3 NRs) were deposited using the glancing angle deposition (GLAD) technique on n-type Si (100) substrate. The annealing effect on the electrical and structural properties of the as-deposited samples was evaluated at 500 °C. The improved crystal structure was seen in the annealed sample. The average crystallite size of the annealed samples (21.85 nm) was found to be higher than that of the as-deposited samples (18.08 nm). Enhancement in the responsivity with a turn-on voltage of + 0.47 V was estimated for the annealed devices. Moreover, the improved internal gain of 53.13, detectivity of 9.47 × 1013 Jones, and noise equivalent power of 5.92 × 10–14 W were obtained after annealing. A rise time of 34 ms and a fall time of 53 ms were also obtained for the annealed device. The overall improvement in the device performance of Gd2O3 NRs after annealing could be a viable candidate for photodetector applications.

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Acknowledgements

The authors would like to thank SAIF NEHU for TEM characterization, Centre of Excellence in Advanced Materials, NIT Durgapur for FESEM, NIT Nagaland for XRD measurement and financial support.

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Authors and Affiliations

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

    Ph. Nonglen Meitei & Naorem Khelchand Singh

  2. Department of Physics, College of Science, King Faisal University, Al-Hassa, 31982, Saudi Arabia

    Mir Waqas Alam

  3. Department of Electronics and Communication Engineering, National Institute of Technology, Manipur, Imphal, 795001, India

    Chitralekha Ngangbam

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  1. Ph. Nonglen Meitei
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  2. Mir Waqas Alam
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  3. Chitralekha Ngangbam
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  4. Naorem Khelchand Singh
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Correspondence to Naorem Khelchand Singh.

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Meitei, P.N., Alam, M.W., Ngangbam, C. et al. Enhanced UV photodetection characteristics of annealed Gd2O3 nanorods. Appl Nanosci 11, 1437–1445 (2021). https://doi.org/10.1007/s13204-021-01787-7

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  • DOI: https://doi.org/10.1007/s13204-021-01787-7

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