title: Thermoelectric SnS and SnS-SnSe solid solutions prepared by mechanical alloying and spark plasma sintering: Anisotropic thermoelectric properties.
abstract: P-type SnS compound and SnS1-xSexsolid solutions were prepared by mechanical alloying followed by spark plasma sintering (SPS) and their thermoelectric properties were then studied in different compositions (x = 0.0, 0.2, 0.5, 0.8) along the directions parallel (//) and perpendicular (⊥) to the SPS-pressurizing direction in the temperature range 323-823 Κ. SnS compound and SnS1-xSexsolid solutions exhibited anisotropic thermoelectric performance and showed higher power factor and thermal conductivity along the direction ⊥ than the // one. The thermal conductivity decreased with increasing contents of Se and fell to 0.36 W m-1K-1at 823 K for the composition SnS0.5Se0.5. With increasing selenium content (x) the formation of solid solutions substantially improved the electrical conductivity due to the increased carrier concentration. Hence, the optimized power factor and reduced thermal conductivity resulted in a maximum ZT value of 0.64 at 823 K for SnS0.2Se0.8along the parallel direction.
authors.affiliation: State Key Laboratory of New Ceramics and Fine Processing, School of Material Science and Engineering, Tsinghua University, Beijing 100084, China.
authors.lastname: Asfandiyar
authors.affiliation: State Key Laboratory of New Ceramics and Fine Processing, School of Material Science and Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Tian-Ran
authors.initials: TR
authors.lastname: Wei
authors.affiliation: State Key Laboratory of New Ceramics and Fine Processing, School of Material Science and Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Zhiliang
authors.initials: Z
authors.lastname: Li
authors.affiliation: State Key Laboratory of New Ceramics and Fine Processing, School of Material Science and Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Fu-Hua
authors.initials: FH
authors.lastname: Sun
authors.affiliation: State Key Laboratory of New Ceramics and Fine Processing, School of Material Science and Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Pan
authors.affiliation: State Key Laboratory of New Ceramics and Fine Processing, School of Material Science and Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Chao-Feng
authors.initials: CF
authors.lastname: Wu
authors.affiliation: Xinjiang Inspection Institute of Special Equipment, Urumqi, 830011, China.
authors.forename: Muhammad Umer
authors.initials: MU
authors.lastname: Farooq
authors.affiliation: State Key Laboratory of New Ceramics and Fine Processing, School of Material Science and Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Huaichao
authors.initials: H
authors.lastname: Tang
authors.affiliation: Advanced Materials Institute, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China.|School of Physics and Energy, and Shenzhen Key Laboratory of Sensor Technology, Shenzhen University, Shenzhen, 518060, China.
authors.forename: Fu
authors.initials: F
authors.lastname: Li
authors.affiliation: Advanced Materials Institute, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China.
authors.forename: Bo
authors.initials: B
authors.lastname: Li
authors.affiliation: State Key Laboratory of New Ceramics and Fine Processing, School of Material Science and Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Jing-Feng
authors.initials: JF
authors.lastname: Li