journal article·2016-06-22

Enhanced Thermoelectricity in High-Temperature β-Phase Copper(I) Selenides Embedded with Cu2Te Nanoclusters

Sajid Butt, Wei Xu, Muhammad U. Farooq, Guang K. Ren, Qinghua Zhang, Yingcai Zhu, Sajid U. Khan, Lijuan Liu, Meijuan Yu, Fida Mohmed, Yuanhua Lin, Ce-Wen Nan

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Abstract

We report remarkably enhanced thermoelectric performance of Te doped Cu2Se in midtemperature range. Through ball-milling process followed by spark plasma sintering (SPS), nanoscale Cu2Te clusters were embeded in the matrix of Cu2Se, inducing a drastic enhancement of thermoelectric performance by reducing the thermal conductivity without degrading the power factor. A large ZT value of 1.9 was achieved at 873 K for Cu2Se1.9Te0.1, which is about 2 times larger than that of the pure Cu2Se. The nanoscale heat management by Cu2Te nanoclusters in superionic conductors opens up an avenue for thermoelectric materials research.
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Research context

OpenAlex topics: Advanced Thermoelectric Materials and Devices · Advanced Thermodynamics and Statistical Mechanics · Chalcogenide Semiconductor Thin Films

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

Affiliations

State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, People’s Republic of China

Department of Materials Science and Engineering, Institute of Space Technology, Islamabad 44000, Pakistan

Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P.R. China

RICMASS, Rome International Center for Materials Science Superstripes, Via dei Sabelli 119A, 00185 Rome, Italy

School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, People’s Republic of China

Department of Physics, Zhengzhou University, No. 100 Science Avenue, Zhengzhou, Henan 450001, P.R. China

Funding

Ministry of Science and Technology of the People's Republic of China · National Natural Science Foundation of China

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