Journal
APPLIED PHYSICS LETTERS
Volume 119, Issue 12, Pages -Publisher
AIP Publishing
DOI: 10.1063/5.0065063
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Funding
- International Cooperation Project of the Chinese Academy of Sciences [2017YFE0107800]
- Basic Research Project of the Shanghai Science and Technology Committee [20JC1415100]
- National Natural Science Foundation of China [51625205, 51961135106]
- CAS-DOE Program of the Chinese Academy of Sciences [121631KYSB20180060]
- China Postdoctoral Science Foundation [2020TQ0330]
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Doping I into Ag2S-based materials successfully tunes the carrier concentration and suppresses the lattice thermal conductivity, leading to a significant increase in the thermoelectric figure of merit (zT) value. Doping I has little effect on the ductility and deformability of Ag2S-based materials.
Recently, a deformable and ductile inorganic semiconductor Ag2S has attracted intense attention due to its potential application in selfpowered wearable and hetero-shaped electronics. However, the thermoelectric figure of merit (zT) of Ag2S is greatly limited by its extremely low carrier concentration. In this study, via doping I into Ag2S-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 Ag2S0.7Se0.295I0.005 at 300 K, about three times higher than the matrix compound. More importantly, doping I has little effect on the ductility and deformability of Ag2S-based materials. Our study shows that I-doped Ag2S-based materials are good candidates for developing flexible thermoelectric technologies. Published under an exclusive license by AIP Publishing.
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