Thermoelectric properties of phosphorus-doped indium tellurosilicate: InSiTe<inf>3</inf>

• Main Authors: Tawat Suriwong, Ken Kurosaki, Somchai Thongtem
• Format: Journal
• Published: 2018
• Online Access: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85033573264&origin=inward; http://cmuir.cmu.ac.th/jspui/handle/6653943832/43831
• Institution: Chiang Mai University

© 2017 Elsevier B.V. Polycrystalline samples of undoped and doped indium tellurosilicate: InSiTe 3 were synthesized and their thermoelectric (TE) properties were investigated in the temperature range from 323 to 723 K. Phosphorus (P) was selected as an electron dopant, i.e., the starting compositions were set as InSi 1-x P x Te 3 (x = 0, 0.02, 0.04, 0.06, and 0.1), The P doping increases the carrier concentration, which leads to decrease in both the electrical resistivity (ρ) and the Seebeck coefficient (S), while has little effect on the thermal conductivity (κ). As the results, the figure of merit ZT = S 2 ρ −1 κ −1 T increases with increasing the P content. The maximum ZT value is 0.14 at 723 K, obtained for InSi 0.9 P 0.1 Te 3 . The present results suggest that InSiTe 3 can be a good TE material.