Journal article

Publication year: 2018

Pages: 13043-13048

Journal: Journal of Materials Chemistry C Materials for optical and electronic devices

Volume number: 6

Issue number: 47

ISSN: 2050-7526

eISSN: 2050-7534

DOI Link: https://doi.org/10.1039/c8tc05038d

Publisher: Royal Society of Chemistry

Abstract: 
Inspired by the high figure-of-merit, zT, of -Cu2Se at elevated temperatures, the thermoelectric properties of the hot-pressed sulphide-tellurides Ba3Cu16-x(S,Te)(11) were studied. These materials crystallize in a rhombohedral structure, space group R3m. Hot-pressed Ba3Cu15.3S7.5Te3.5 has the highest power factor, 4.6 W cm(-1) K-2, which is almost 50% higher than that of the best cold-pressed sample, Ba3Cu16S9Te2 with 2.4 W cm(-1) K-2 at 700 K. These quaternary sulphide-tellurides are bestowed with an extraordinarily low total thermal conductivity, which is below 0.6 W m(-1) K-1 throughout the entire studied temperature range. In addition, their higher stability at elevated temperatures compared to Cu2S and -Cu2Se with high zT values renders them more feasible for thermoelectric devices. Among the three studied materials, the one with the highest Te content, Ba3Cu15.3S7.5Te3.5, exhibits the lowest thermal conductivity and the highest electrical conductivity, which results in zT = 0.88 at 745 K.

Harvard Citation style: Jafarzadeh, P., Oudah, M., Assoud, A., Farahi, N., Mueller, E. and Kleinke, H. (2018) High thermoelectric performance of Ba₃Cu_16-x(S,Te)₁₁, Journal of Materials Chemistry C Materials for optical and electronic devices, 6(47), pp. 13043-13048. https://doi.org/10.1039/c8tc05038d

APA Citation style: Jafarzadeh, P., Oudah, M., Assoud, A., Farahi, N., Mueller, E., & Kleinke, H. (2018). High thermoelectric performance of Ba₃Cu_16-x(S,Te)₁₁. Journal of Materials Chemistry C Materials for optical and electronic devices. 6(47), 13043-13048. https://doi.org/10.1039/c8tc05038d