title: Enhanced Thermoelectricity in High-Temperature β-Phase Copper(I) Selenides Embedded with Cu2Te Nanoclusters.
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.
authors.affiliation: 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.
authors.forename: Sajid
authors.initials: S
authors.lastname: Butt
authors.affiliation: 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.
authors.forename: Wei
authors.initials: W
authors.lastname: Xu
authors.affiliation: School of Materials Science and Engineering, University of Science and Technology Beijing , Beijing 100083, People's Republic of China.
authors.forename: Muhammad U
authors.initials: MU
authors.lastname: Farooq
authors.affiliation: State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University , Beijing 100084, People's Republic of China.
authors.forename: Guang K
authors.initials: GK
authors.lastname: Ren
authors.affiliation: State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University , Beijing 100084, People's Republic of China.
authors.forename: Qinghua
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049, P.R. China.
authors.forename: Yingcai
authors.initials: Y
authors.lastname: Zhu
authors.affiliation: Department of Materials Science and Engineering, Institute of Space Technology , Islamabad 44000, Pakistan.
authors.forename: Sajid U
authors.initials: SU
authors.lastname: Khan
authors.affiliation: Department of Physics, Zhengzhou University , No. 100 Science Avenue, Zhengzhou, Henan 450001, P.R. China.
authors.forename: Lijuan
authors.initials: L
authors.lastname: Liu
authors.affiliation: Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049, P.R. China.
authors.forename: Meijuan
authors.initials: M
authors.lastname: Yu
authors.affiliation: State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University , Beijing 100084, People's Republic of China.
authors.forename: Fida
authors.initials: F
authors.lastname: Mohmed
authors.affiliation: State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University , Beijing 100084, People's Republic of China.
authors.forename: Yuanhua
authors.initials: Y
authors.lastname: Lin
authors.affiliation: State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University , Beijing 100084, People's Republic of China.
authors.forename: Ce-Wen
authors.initials: CW
authors.lastname: Nan
keywords: Cu2Se; Cu2Te nanoclusters; ZT; nanoscale heat management; superionic conductors