2025/05/13 by A.B. Ivanova, Olga Kutsemako, Ivanova, Alexandra +19
Engineering · Materials Science · #Perovskite Materials and Applications #Advanced Thermoelectric Materials and Devices #Chalcogenide Semiconductor Thin Films
paper · pdf · doi:10.48550/arxiv.2505.09013
This work presents a comprehensive investigation of the thermoelectric properties of bulk hybrid perovskites with the general formula MAxCs1-xSnI3 (0 < x < 1). A series of bulk samples were synthesized and systematically characterized to explore the relationship between composition, microstructure, and thermoelectric performance. Compositions with intermediate MA+ content (x = 0.2 and x = 0.5) show an optimal balance between electrical conductivity and Seebeck coefficient, yielding high power factor values (0.6 - 0.7 muW/cmK2 at 423 K) and favorable thermoelectric performance with zT values up to 0.06. In contrast, compositions with MA+ contents (x = 0, x = 0.6, and x = 0.8) exhibit lower thermoelectric performance due to reduced Seebeck coefficients or suppressed conductivity. MASnI3 shows promising low-temperature thermoelectric performance with a maximum zT of 0.10 at 423 K, attributed to its rapidly increasing Seebeck coefficient. These findings highlight the importance of microstructural control and composition optimization in the development of hybrid perovskites for thermoelectric applications.