Electrical and thermal transport properties of layered Bi2YO4Cu2Se2

Xiao, Yu1; Pei, Yanling1; Chang, Cheng1; Zhang, Xiao1; Tan, Xing2; Ye, Xinxin3; Gong, Shengkai1; Lin, Yuanhua2; He, Jiaqing3; Zhao, Li-Dong1

2016-07

10.1016/j.jssc.2016.03.032

JOURNAL OF SOLID STATE CHEMISTRY   影响因子和分区

0022-4596

1095-726X

Bi2YO4Cu2Se2 possesses a low thermal conductivity and high electrical conductivity at room temperature, which was considered as a potential thermoelectric material. In this work, we have investigated the electrical and thermal transport properties of Bi2YO4Cu2Se2 system in the temperature range from 300 K to 873 K. We found that the total thermal conductivity decreases from similar to 1.8 W m(-1) K-1 to similar to 0.9 W m(-1) K-1, and the electrical conductivity decreases from similar to 850 S/cm to similar to 163 S/cm in the measured temperature range. To investigate how potential of Bi2YO4Cu2Se2 system, we prepared the heavily Iodine doped samples to counter-dope intrinsically high carrier concentration and improve the electrical transport prpperties. Interestingly, the Seebeck coefficient could be enhanced to similar to+80 mu V/K at 873 K, meanwhile, we found that a low thermal conductivity of similar to 0.7 W m(-1) K-1 could be achieved. The intrinsically low thermal conductivity in this system is related to the low elastic properties, such as Young's modulus of 70-72 GPa, and Grfineisen parameters of 1.55-1.71. The low thermal conductivity makes Bi2YO4Cu2Se2 system to be a potential thermoelectric material, the ZT value similar to 0.06 at 873 K was obtained, a higher performance is expected by optimizing electrical transport properties through selecting suitable dopants, modifying band structures or by further reducing thermal conductivity through nanostructuring etc. (C) 2016 Published by Elsevier Inc.

Bi2YO4Cu2Se2 Thermoelectric Thermal conductivity Electrical conductivity Seebeck coefficient

SCI ; EI

英语

其他

Science, Technology and Innovation Commission of Shenzhen Municipality[ZDSYS20141118160434515] ; Science, Technology and Innovation Commission of Shenzhen Municipality[JCYJ20140612140151884]

Chemistry

Chemistry, Inorganic & Nuclear ; Chemistry, Physical

WOS:000377422000026

ACADEMIC PRESS INC ELSEVIER SCIENCE

20161802336848

Carrier concentration ; Doping (additives) ; Elastic moduli ; Electric conductivity ; Seebeck coefficient ; Thermoelectric equipment

Thermoelectric Energy:615.4 ; Thermodynamics:641.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Materials Science:951

CHEMISTRY

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.South Univ Sci & Technol China, Dept Phys, Shenzhen 518055, Peoples R China

Xiao, Yu,Pei, Yanling,Chang, Cheng,et al. Electrical and thermal transport properties of layered Bi2YO4Cu2Se2[J]. JOURNAL OF SOLID STATE CHEMISTRY,2016,239:178-183.

Xiao, Yu.,Pei, Yanling.,Chang, Cheng.,Zhang, Xiao.,Tan, Xing.,...&Zhao, Li-Dong.(2016).Electrical and thermal transport properties of layered Bi2YO4Cu2Se2.JOURNAL OF SOLID STATE CHEMISTRY,239,178-183.

Xiao, Yu,et al."Electrical and thermal transport properties of layered Bi2YO4Cu2Se2".JOURNAL OF SOLID STATE CHEMISTRY 239(2016):178-183.