Boosting the thermoelectric performance of PbSe through dynamic doping and hierarchical phonon scattering

You, Li1; Liu, Yefeng1; Li, Xin2; Nan, Pengfei3,4; Ge, Binghui3; Jiang, Ying2; Luo, Pengfei1; Pan, Shanshan1; Pei, Yanzhong5; Zhang, Wenqing6,7; Snyder, G. Jeffrey8; Yang, Jiong2; Zhang, Jiye1; Luo, Jun1,2

2018-07

10.1039/c8ee00418h

Energy & Environmental Science   影响因子和分区

1754-5692

1754-5706

Here we find the peculiar behavior of Cu ions in the PbSe-Cu system increases its thermoelectric performance. For the electrical transport, a dynamic doping effect is achieved because more Cu ions enter into the PbSe lattice and provide extra charge carriers as the temperature increases, which guarantees an optimized carrier concentration over a wide temperature range. For the thermal transport, the presence of Cu2Se nanoprecipitates and dislocations at a low temperature range as well as the vibration of Cu atoms around the interstitial sites of PbSe at high temperatures result in hierarchical phonon scattering and a significantly reduced lattice thermal conductivity over the whole temperature range. As a result, a peak thermoelectric material figure of merit zT of up to 1.45 and a thermoelectric device figure of merit ZT close to unity are obtained for the sample with 0.375 at% Cu. Furthermore, enhanced thermoelectric properties are also realized for the Cu-intercalated PbS, implying that the temperature-driven dynamic behavior of Cu ions in a rigid lattice can serve as a general strategy to optimize the thermoelectric performance of IV-VI compounds.

SCI ; EI

英语

其他

U.S. Department of Energy[DE-SC0001299]

Chemistry ; Energy & Fuels ; Engineering ; Environmental Sciences & Ecology

Chemistry, Multidisciplinary ; Energy & Fuels ; Engineering, Chemical ; Environmental Sciences

WOS:000438392400020

ROYAL SOC CHEMISTRY

20183005582245

Carrier concentration ; Copper ; Heavy ions ; IV-VI semiconductors ; Lead compounds ; Phonon scattering ; Phonons ; Precipitation (chemical) ; Selenium compounds ; Temperature ; Thermal conductivity ; Thermoelectric equipment

Copper:544.1 ; Thermoelectric Energy:615.4 ; Thermodynamics:641.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Chemical Operations:802.3

Web of Science

1.Shanghai Univ, Sch Mat Sci & Engn, 99 Shangda Rd, Shanghai 200444, Peoples R China
2.Shanghai Univ, Mat Genome Inst, 99 Shangda Rd, Shanghai 200444, Peoples R China
3.Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China
4.Beijing Inst Technol, Sch Phys, Beijing Key Lab Nanophoton & Ultrafine Optoelect, Beijing 100081, Peoples R China
5.Tongji Univ, Sch Mat Sci & Engn, 4800 Caoan Rd, Shanghai 201804, Peoples R China
6.Southern Univ Sci & Technol, Shenzhen Key Lab Thermoelectr Mat, Shenzhen 518055, Peoples R China
7.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
8.Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA

You, Li,Liu, Yefeng,Li, Xin,et al. Boosting the thermoelectric performance of PbSe through dynamic doping and hierarchical phonon scattering[J]. Energy & Environmental Science,2018,11(7):1848-1858.

You, Li.,Liu, Yefeng.,Li, Xin.,Nan, Pengfei.,Ge, Binghui.,...&Luo, Jun.(2018).Boosting the thermoelectric performance of PbSe through dynamic doping and hierarchical phonon scattering.Energy & Environmental Science,11(7),1848-1858.

You, Li,et al."Boosting the thermoelectric performance of PbSe through dynamic doping and hierarchical phonon scattering".Energy & Environmental Science 11.7(2018):1848-1858.