Remarkable electron and phonon band structures lead to a high thermoelectric performance ZT > 1 in earth-abundant and eco-friendly SnS crystals

He, Wenke1; Wang, Dongyang1; Dong, Jin-Feng2; Qiu, Yang3; Fu, Liangwei4; Feng, Yue4; Hao, Yujie4,5,6; Wang, Guangtao7; Wang, Jinfeng7; Liu, Chang4,5,6; Li, Jing-Feng2; He, Jiaqing3,4; Zhao, Li-Dong1

2018-06-07

10.1039/c8ta03150a

Journal of Materials Chemistry A   影响因子和分区

2050-7488

2050-7496

Tin selenide (SnSe), a simple binary compound with low-cost, earth-abundant and eco-friendly elements, has aroused extensive interest in the thermoelectric community on account of its promising power generation. Herein, we report a much more advantageous SnS crystal with promising thermoelectric performance, as an alternative to SnSe. We found that the maximum ZT > 1.0 at 873 K and high device ZT (ZT(dev)) > 0.57 from 300 to 873 K can be achieved in hole-doped SnS crystals, projecting a conversion efficiency of approximate to 10.4%. We attribute the excellent performance of SnS to its remarkable electron and phonon band structures. SnS possesses multiple valence bands, which can be activated by hole doping through pushing the Fermi level deep into the valence band structure, and activating several Fermi pockets to produce enhanced Seebeck coefficients and high power factors approximate to 30 W cm(-1) K-2 at 300 K. Meanwhile, the anharmonic and anisotropic bonding of SnS leads to a low thermal conductivity, which ranges from 0.65 to 0.85 W m(-1) K-1 at 873 K. Our results indicate that SnS is a promising thermoelectric material for energy conversion applications in low and moderate temperature ranges.

SCI ; EI

英语

其他

Science, Technology and Innovation Commission of the Shenzhen Municipality[ZDSYS20170303165926217] ; Science, Technology and Innovation Commission of the Shenzhen Municipality[JCYJ20150630145302240]

Chemistry ; Energy & Fuels ; Materials Science

Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000434241800030

ROYAL SOC CHEMISTRY

20182305290130

Conversion efficiency ; Energy conversion ; Environmental protection ; IV-VI semiconductors ; Layered semiconductors ; Phonons ; Thermal conductivity ; Thermoelectric energy conversion ; Thermoelectricity ; Tin compounds ; Valence bands

Environmental Impact and Protection:454.2 ; Energy Conversion Issues:525.5 ; Thermoelectric Energy:615.4 ; Thermodynamics:641.1 ; Electricity: Basic Concepts and Phenomena:701.1

Web of Science

1.Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
2.Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
3.Southern Univ Sci & Technol, Pico Ctr, Mat Characterizat & Preparat Ctr, Shenzhen 518055, Peoples R China
4.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
5.Southern Univ Sci & Technol, Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
6.Shenzhen Key Lab Quantum Sci & Engn, Shenzhen 518055, Peoples R China
7.Henan Normal Univ, Coll Phys & Mat Sci, Xinxiang 453007, Peoples R China

He, Wenke,Wang, Dongyang,Dong, Jin-Feng,et al. Remarkable electron and phonon band structures lead to a high thermoelectric performance ZT > 1 in earth-abundant and eco-friendly SnS crystals[J]. Journal of Materials Chemistry A,2018,6(21):10048-10056.

He, Wenke.,Wang, Dongyang.,Dong, Jin-Feng.,Qiu, Yang.,Fu, Liangwei.,...&Zhao, Li-Dong.(2018).Remarkable electron and phonon band structures lead to a high thermoelectric performance ZT > 1 in earth-abundant and eco-friendly SnS crystals.Journal of Materials Chemistry A,6(21),10048-10056.

He, Wenke,et al."Remarkable electron and phonon band structures lead to a high thermoelectric performance ZT > 1 in earth-abundant and eco-friendly SnS crystals".Journal of Materials Chemistry A 6.21(2018):10048-10056.