Thermoelectric behavior of (Ba0.2Sr0.2Ca0.2La0.2Na0.2)CoO3 high entropy cobaltate-based perovskite

Oxides are considered as promising thermoelectric materials due to their excellent thermal and chemical stability at elevated temperatures. However, their thermoelectric performances are hindered by high thermal conductivity due to the relatively simple structure compared to the layered or cage-like structure of intermetallics and chalcogenides. In this study, we have successfully crafted a novel cobaltate-based high-entropy oxide perovskite, (Ba