Perspectives on MOVPE-grown (100) β-Ga2O3 thin films and its Al-alloy for power electronics application.

Beta gallium oxide (β-Ga₂O₃) is a promising ultra-wide bandgap semiconductor with attractive physical properties for next-generation high-power devices, radio frequency electronics, and solar-blind ultraviolet radiation detectors. Here, we present an overview and perspective on the development of MOVPE-grown (100) β-Ga₂O₃ thin films and its role in supplementing high-power electronics. We review the development path of the growth process on (100) β-Ga₂O₃ thin films with a discussion regarding the solved and remaining challenges. The structural defect formation mechanism, substrate treatment strategies, and different growth windows are analyzed to optimize the grown film to fulfill the requirements for device fabrication. Toward industrial applications, MOVPE-grown β-Ga₂O₃ thin films are evaluated in two aspects: thick layers with smooth surface roughness and the electrical properties in terms of high carrier mobility and low doping concentration. Based on the reviewed results, we propose strategies in substrate preparation treatments and supportive tools such as the machine learning approaches for future growth process optimization and envision the rising interest of the β-Ga₂O₃-related alloy, β-(Al_xGa_1−x)₂O₃. [ABSTRACT FROM AUTHOR]