Investigations on distinct thermoelectric transport behaviors of Cu in n-type PbS

Zhao, Minghui1; Chang, Cheng1; Xiao, Yu1; Gu, Rui2; He, Jiaqing2; Zhao, Li-Dong1

2019-04-15

10.1016/j.jallcom.2018.12.059

JOURNAL OF ALLOYS AND COMPOUNDS   影响因子和分区

0925-8388

1873-4669

In this work, we reported the thermoelectric performance of Sb doped n-type PbS can be improved through introducing different types of Cu inclusions (counter-doping, extra-adding and both of them). Firstly, Cu was selected to substitute Pb sites as counter-doping to tune the carrier density, resulting in maintaining power factor but a decreasing total thermal conductivity, thus in a maximum ZT (ZT(max)) similar to 0.96 at 923 K in Pb0.975Sb0.02Cu0.005S. Then, we introduced extra Cu in n-type PbS to form interstitials to further reduce the lattice thermal conductivity to similar to 0.77 Wm(-1)K(-1), and the ZT(max) was further enhanced to similar to 1.06 at 923 K in Pb0.98Sb0.02S-0.02Cu. Finally, we combined both types of Cu (counterdoping and extra-adding) into n-type PbS, the power factor experiences slight reduction meanwhile the minimum lattice thermal conductivity can be reduced as low as similar to 0.57 Wm(-1)K(-1) at 923 K. Combining excellent power factor and dramatically reduced lattice thermal conductivity, we obtained a ZT(max) similar to 1.23 at 923 K and the ZT(ave) similar to 0.62 at 300-923 K in Pb0.9 5Sb0.02Cu0.03S-0.03Cu. This work provides a new idea to improve the thermoelectric performance in n-type PbS, indicating that PbS is one robust alternative of PbTe. (C) 2018 Elsevier B.V. All rights reserved.

Thermoelectric n-type PbS Cu inclusion Power factor Lattice thermal conductivity

SCI ; EI

英语

其他

111 Project[B17002]

Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering

Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering

WOS:000457845900096

ELSEVIER SCIENCE SA

20185106259498

Copper ; Crystal lattices ; Electric power factor ; IV-VI semiconductors ; Lead compounds ; Tellurium compounds ; Thermal conductivity ; Thermoelectricity

Copper:544.1 ; Thermodynamics:641.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Crystal Lattice:933.1.1

MATERIALS SCIENCE

Web of Science

1.Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
2.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China

Zhao, Minghui,Chang, Cheng,Xiao, Yu,et al. Investigations on distinct thermoelectric transport behaviors of Cu in n-type PbS[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2019,781:820-830.

Zhao, Minghui,Chang, Cheng,Xiao, Yu,Gu, Rui,He, Jiaqing,&Zhao, Li-Dong.(2019).Investigations on distinct thermoelectric transport behaviors of Cu in n-type PbS.JOURNAL OF ALLOYS AND COMPOUNDS,781,820-830.

Zhao, Minghui,et al."Investigations on distinct thermoelectric transport behaviors of Cu in n-type PbS".JOURNAL OF ALLOYS AND COMPOUNDS 781(2019):820-830.