Hydrogen-related 3.8 eV UV luminescence in α-Ga2O3

Nicol, D. and Oshima, Y. and Roberts, J. W. and Penman, L. and Cameron, D. and Chalker, P. R. and Martin, R. W. and Massabuau, F. C.-P. (2023) Hydrogen-related 3.8 eV UV luminescence in α-Ga2O3. Applied Physics Letters, 122 (6). 062102. ISSN 0003-6951 (https://doi.org/10.1063/5.0135103)

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Abstract

Temperature-dependent photoluminescence was used to investigate the impact of H on the optical properties of α-Ga2O3 films grown by halide vapor phase epitaxy. An additional UV luminescence line centered at 3.8 eV is observed at low temperatures, which strongly correlates with the concentration of H in the films. This luminescence line is assigned to donor–acceptor pair recombination involving an H-related shallow donor and H-decorated Ga vacancy (VGa-nH) as the acceptor, where n = 1, 2, 3. Previous reports have already suggested the impact of H on the electrical properties of Ga2O3, and the present study shows its clear impact on the optical properties of α-Ga2O3.

  • Item type:Article
    ID code:84288
    Dates:
    Date
    Event
    7 February 2023
    Published
    14 January 2023
    Accepted
    16 November 2022
    Submitted
    Subjects:Science > Physics > Optics. Light
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:17 Feb 2023 16:23
    Last modified:09 Apr 2024 03:53
    URI:https://strathprints.strath.ac.uk/id/eprint/84288
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