| Abstract Scope |
With the expansion of electric power use, there are growing expectations for thermoelectric and photoelectric conversion technologies that utilize natural energy. However, currently, state-of-the-art high-efficiency materials are mainly composed of heavy and toxic elements, and it is necessary to develop new materials consisting only of environmentally benign elements for further expanding their applications. In this talk, we will introduce our recent research results for the development of new thermoelectric and photoelectric conversion materials by a combination of first-principles calculations and experiments. For thermoelectric materials, we will introduce new design routes for strong phonon scattering and ZT enhancement of transition metal oxide, SrTiO3 by hydride anion (H–) substitution [Adv. Funct. Mater. 33, 2313144 (2023).] and also recent discovery of high ZT ~2.1 in inverse perovskite Ba3SiO without using toxic elements [Adv. Sci. 11, 2307058 (2024).]. Also, we will introduce the design of new photoelectric conversion materials. |