3D charge and 2D phonon transports leading to high out-of-plane ZT in n-type SnSe crystals
Chang, C; Wu, MH; He, DS; Pei, YL; Wu, CF; Wu, XF; Yu, HL; Zhu, FY; Wang, KD; Chen, Y; Huang, L; Li, JF; He, JQ; Zhao, LD
2018
发表期刊SCIENCE
ISSN0036-8075
卷号360期号:6390页码:778-782
文章类型期刊论文
摘要Thermoelectric technology enables the harvest of waste heat and its direct conversion into electricity. The conversion efficiency is determined by the materials figure of merit ZT. Here we show a maximum ZT of similar to 2.8 +/- 0.5 at 773 kelvin in n-type tin selenide (SnSe) crystals out of plane. The thermal conductivity in layered SnSe crystals is the lowest in the out-of-plane direction [two-dimensional (2D) phonon transport]. We doped SnSe with bromine to make n-type SnSe crystals with the overlapping interlayer charge density (3D charge transport). A continuous phase transition increases the symmetry and diverges two converged conduction bands. These two factors improve carrier mobility, while preserving a large Seebeck coefficient. Our findings can be applied in 2D layered materials and provide a new strategy to enhance out-of-plane electrical transport properties without degrading thermal properties.
关键词High-thermoelectric Performance Thermal-conductivity Single-crystals Bulk Thermoelectrics Efficiency Enhancement Temperature Scattering Distortion Mechanism
DOI10.1126/science.aaq1479
收录类别SCI
语种英语
WOS记录号WOS:000432473500046
引用统计
被引频次:10[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/28900
专题中科院上海应用物理研究所2011-2018年
作者单位1.Chang, C
2.Wu, MH
3.He, DS
4.Pei, YL
5.Wu, CF
6.Wu, XF
7.Yu, HL
8.Zhu, FY
9.Wang, KD
10.Chen, Y
11.Huang, L
12.Li, JF
13.He, JQ
14.Zhao, LD
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GB/T 7714
Chang, C,Wu, MH,He, DS,et al. 3D charge and 2D phonon transports leading to high out-of-plane ZT in n-type SnSe crystals[J]. SCIENCE,2018,360(6390):778-782.
APA Chang, C.,Wu, MH.,He, DS.,Pei, YL.,Wu, CF.,...&Zhao, LD.(2018).3D charge and 2D phonon transports leading to high out-of-plane ZT in n-type SnSe crystals.SCIENCE,360(6390),778-782.
MLA Chang, C,et al."3D charge and 2D phonon transports leading to high out-of-plane ZT in n-type SnSe crystals".SCIENCE 360.6390(2018):778-782.
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