title: Simultaneous Enhancement of Electrical Conductivity and Thermopower of Bi₂Te₃ by Multifunctionality of Native Defects.
abstract: Simultaneous increases in electrical conductivity (up to 200%) and thermopower (up to 70%) are demonstrated by introducing native defects in Bi2 Te3 films, leading to a high power factor of 3.4 × 10(-3) W m(-1) K(-2). The maximum enhancement of the power factor occurs when the native defects act beneficially both as electron donors and energy filters to mobile electrons. They also act as effective phonon scatterers.
authors.affiliation: Department of Materials Science and Engineering, University of California, Berkeley, CA, 94720, USA.|Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.
authors.forename: Joonki
authors.initials: J
authors.lastname: Suh
authors.affiliation: Department of Materials Science and Engineering, University of California, Berkeley, CA, 94720, USA.|Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.
authors.forename: Kin Man
authors.initials: KM
authors.lastname: Yu
authors.affiliation: Department of Materials Science and Engineering, University of California, Berkeley, CA, 94720, USA.|Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.
authors.forename: Deyi
authors.initials: D
authors.lastname: Fu
authors.affiliation: Department of Physics, University of Notre Dame, Notre Dame, IN, 46556, USA.
authors.forename: Xinyu
authors.initials: X
authors.lastname: Liu
authors.affiliation: Department of Mechanical Engineering, University of California, Berkeley, CA, 94720, USA.
authors.forename: Fan
authors.initials: F
authors.lastname: Yang
authors.affiliation: Department of Physics, Arizona State University, Tempe, AZ, 85287, USA.
authors.forename: Jin
authors.initials: J
authors.lastname: Fan
authors.affiliation: Department of Physics, Arizona State University, Tempe, AZ, 85287, USA.
authors.forename: David J
authors.initials: DJ
authors.lastname: Smith
authors.affiliation: School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, AZ, 85287, USA.
authors.forename: Yong-Hang
authors.initials: YH
authors.lastname: Zhang
authors.affiliation: Department of Physics, University of Notre Dame, Notre Dame, IN, 46556, USA.
authors.forename: Jacek K
authors.initials: JK
authors.lastname: Furdyna
authors.affiliation: Department of Mechanical Engineering, University of California, Berkeley, CA, 94720, USA.
authors.forename: Chris
authors.initials: C
authors.lastname: Dames
authors.affiliation: Department of Materials Science and Engineering, University of California, Berkeley, CA, 94720, USA.|Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.
authors.forename: Wladyslaw
authors.initials: W
authors.lastname: Walukiewicz
authors.affiliation: Department of Materials Science and Engineering, University of California, Berkeley, CA, 94720, USA.|Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.
authors.forename: Junqiao
authors.initials: J
authors.lastname: Wu
keywords: Bi2Te3; defect engineering; native point defects; particle irradiation; thermoelectric properties