Enhanced thermoelectric properties in p‐type Bi_{0.4}Sb_{1.6}Te₃ alloy by combining incorporation and doping using multi‐scale CuAlO₂ particles

Zijun Song; Qihao Zhang; Yuan Liu; Zhenxing Zhou; Xiaofang Lu; Lianjun Wang; Wan Jiang; Lidong Chen

doi:10.1002/pssa.201600451

journal article·2017-01

Enhanced thermoelectric properties in p‐type Bi_0.4Sb_1.6Te₃ alloy by combining incorporation and doping using multi‐scale CuAlO₂ particles

Zijun Song, Qihao Zhang, Yuan Liu, Zhenxing Zhou, Xiaofang Lu, Lianjun Wang, Wan Jiang, Lidong Chen

physica status solidi (a)· Volume 214· Issue 1

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Source abstract

Abstract

Multi‐scale CuAlO₂ particles are introduced into the Bi_0.4Sb_1.6Te₃ matrix to synergistically optimize the electrical conductivity, Seebeck coefficient, and the lattice thermal conductivity. Cu element originating from fine CuAlO₂ grains diffuses into the Bi_0.4Sb_1.6Te₃ matrix and tunes the carrier concentration while the coarse CuAlO₂ particles survive as the second phase within the matrix. The power factor is improved at the whole temperatures range due to the low‐energy electron filtering effect on Seebeck coefficient and enhanced electrical transport property by mild Cu doping. Meanwhile, the remaining CuAlO₂ inclusions give rise to more boundaries and newly built interfaces scattering of heat‐carrying phonons, resulting in the reduced lattice thermal conductivity. Consequently, the maximum ZT is found to be enhanced by 150% arising from the multi‐scale microstructure regulation when the CuAlO₂ content reaches 0.6 vol.%. Not only that, but the ZT curves get flat in the whole temperature range after introducing the multi‐scale CuAlO₂ particles, which leads to a remarkable increase in the average ZT.

Source: crossref · Quality: baseline

Research context

Metals & alloys

OpenAlex topics: Advanced Thermoelectric Materials and Devices · Thermal properties of materials · Thermal Radiation and Cooling Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering Donghua University 2999 North Renmin Road Shanghai 201620 P.R. China

Institute of Functional Materials Donghua University Shanghai 201620 P.R. China

State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 P.R. China

University of Chinese Academy of Sciences Beijing 100049 P.R. China

School of Material Science and Engineering Jingdezhen Ceramic Institute Jingdezhen 333000 P.R. China

Funding

Natural Science Foundation of China · Shanghai Committee of Science and Technology · Opening Project of State Key Laboratory of High Performance Ceramics and Superfine Microstructure · Fundamental Research Funds for the Central Universities · DHU Distinguished Young Professor Program · DHU post-graduate innovation program

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