Journal
CERAMICS INTERNATIONAL
Volume 48, Issue 4, Pages 5698-5703Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2021.11.115
Keywords
beta-Ga2O3; Thermal oxidization; Nanowires; Heterojunction
Categories
Funding
- National Natural Science Founda-tion of China [61774072, 61574069, 61674068]
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The study prepared beta-Ga2O3 nanostructures in 1D nanowires and bulk films by thermal oxidation of GaAs substrate. The growth mechanisms were discussed and the NW films showed higher emission performance, with a successful fabrication of a p-GaAs/beta-Ga2O3 NWs heterojunction.
The beta-Ga2O3 nanostructures of one-dimensional (1D) nanowires (NWs) and bulk films were prepared by thermal oxidation (TO) of GaAs substrate. The growth mechanisms of beta-Ga2O3 are discussed in detail. The formation of these NW structures is closely linked to the process of oxygen-free annealing. The two kinds of nanostructured films have distinct structure differences while the same crystal plane orientation. Compared with bulk films, the NW films show higher donor-acceptor pair-induced blue emission. A p-GaAs/beta-Ga2O3 NWs heterojunction was fabricated with a turn-on voltage of 1.3 V matching well with simulation results. The proposed method can flexibly and catalyst-free prepare high-quality, high surface-to-volume ratio and uniform beta-Ga2O3 NW films, which is promising for optoelectmnics and gas sensing.
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