Wide Bandgap Perovskite Oxides with High Room‐Temperature Electron Mobility

다국어 초록 (Multilingual Abstract)

Perovskite oxides are ABO3‐type compounds with a crystal structure capable of accommodating a large number of elements at A‐ and B‐sites. Owing to their flexible structure and complex chemistry, they exhibit a wide range of functionalities as well as novel ground states at the interface. However, in comparison with conventional semiconductors such as silicon, they possess orders of magnitude lower room‐temperature electron mobilities limiting their room‐temperature electronic applications. For example, in a prototypical doped SrTiO3, the room‐temperature electron mobility remains below 10 cm2 V−1 s−1 regardless of the defect minimization. Discovery of high room‐temperature mobility in alkaline‐earth stannates such as BaSnO3 and SrSnO3 constitutes a significant advancement toward all‐perovskite electronic and spintronic devices. Alkaline‐earth stannates also possess wide‐to‐ultra wide bandgaps that make them potentially suitable candidate for transparent conductors, power electronic devices, and high electron mobility transistors. This article provides an overview of the recent progress made to these materials' electrical properties with particular emphasis on the advancements in the molecular beam epitaxy approaches for their synthesis, and defect control.
This article provides an overview of the recent progress made to the alkaline‐earth stannates as a high room‐temperature mobility perovskite oxide semiconductor with particular emphasis on the advancements in the molecular beam epitaxy approaches for the study of their synthesis‐structure‐defect‐property relationships.