1. Enhanced thermoelectric performance in ductile Ag2S-based materials via doping iodine.
- Author
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Liu, Jin, Xing, Tong, Gao, Zhiqiang, Liang, Jiasheng, Peng, Liming, Xiao, Jie, Qiu, Pengfei, Shi, Xun, and Chen, Lidong
- Subjects
CARRIER density ,THERMOELECTRIC materials ,THERMAL conductivity ,IODINE ,WEARABLE technology ,SILVER sulfide ,SEMICONDUCTORS - Abstract
Recently, a deformable and ductile inorganic semiconductor Ag
2 S has attracted intense attention due to its potential application in self-powered wearable and hetero-shaped electronics. However, the thermoelectric figure of merit (zT) of Ag2 S is greatly limited by its extremely low carrier concentration. In this study, via doping I into Ag2 S-based materials, we tune the carrier concentration into the optimal range as well as suppressing the lattice thermal conductivity. A maximum zT value of 0.26 is achieved for Ag2 S0.7 Se0.295 I0.005 at 300 K, about three times higher than the matrix compound. More importantly, doping I has little effect on the ductility and deformability of Ag2 S-based materials. Our study shows that I-doped Ag2 S-based materials are good candidates for developing flexible thermoelectric technologies. [ABSTRACT FROM AUTHOR]- Published
- 2021
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