@article{ZHENG2021, 
author = {Yunpeng ZHENG and Mingchu ZOU and Wenyu ZHANG and Di YI and Jinle LAN and Ce-Wen NAN and Yuan-Hua LIN},
title = {Electrical and thermal transport behaviours of high-entropy perovskite thermoelectric oxides},
year = {2021},
journal = {Journal of Advanced Ceramics},
volume = {10},
number = {2},
pages = {377-384},
keywords = {high entropy, thermoelectric oxides, thermal conductivity, electrical conductivity, oxygen vacancy},
url = {https://www.sciopen.com/article/10.1007/s40145-021-0462-5},
doi = {10.1007/s40145-021-0462-5},
abstract = {Oxide-based ceramics could be promising thermoelectric materials because of their thermal and chemical stability at high temperature. However, their mediocre electrical conductivity or high thermal conductivity is still a challenge for the use in commercial devices. Here, we report significantly suppressed thermal conductivity in SrTiO3-based thermoelectric ceramics via high-entropy strategy for the first time, and optimized electrical conductivity by defect engineering. In high-entropy (Ca0.2Sr0.2Ba0.2Pb0.2La0.2)TiO3 bulks, the minimum thermal conductivity can be 1.17 W/(m·K) at 923 K, which should be ascribed to the large lattice distortion and the huge mass fluctuation effect. The power factor can reach about 295 μW/(m·K2) by inducing oxygen vacancies. Finally, the ZT value of 0.2 can be realized at 873 K in this bulk sample. This approach proposed a new concept of high entropy into thermoelectric oxides, which could be generalized for designing high-performance thermoelectric oxides with low thermal conductivity.}
}