title: Achieving high power factor and output power density in p-type half-Heuslers Nb1-xTixFeSb.
abstract: Improvements in thermoelectric material performance over the past two decades have largely been based on decreasing the phonon thermal conductivity. Enhancing the power factor has been less successful in comparison. In this work, a peak power factor of ∼106 μW⋅cm-1⋅K-2is achieved by increasing the hot pressing temperature up to 1,373 K in the p-type half-Heusler Nb0.95Ti0.05FeSb. The high power factor subsequently yields a record output power density of ∼22 W⋅cm-2based on a single-leg device operating at between 293 K and 868 K. Such a high-output power density can be beneficial for large-scale power generation applications.
authors.affiliation: Department of Physics, University of Houston, Houston, TX 77204.|Texas Center for Superconductivity at the University of Houston, University of Houston, Houston, TX 77204.
authors.forename: Ran
authors.initials: R
authors.lastname: He
authors.affiliation: Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139.
authors.forename: Daniel
authors.initials: D
authors.lastname: Kraemer
authors.affiliation: Department of Physics, University of Houston, Houston, TX 77204.|Texas Center for Superconductivity at the University of Houston, University of Houston, Houston, TX 77204.
authors.forename: Jun
authors.initials: J
authors.lastname: Mao
authors.affiliation: Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139.
authors.forename: Lingping
authors.initials: L
authors.lastname: Zeng
authors.affiliation: Department of Physics, University of Houston, Houston, TX 77204.|Texas Center for Superconductivity at the University of Houston, University of Houston, Houston, TX 77204.
authors.forename: Qing
authors.initials: Q
authors.lastname: Jie
authors.affiliation: Department of Physics and Engineering Physics, Morgan State University, Baltimore, MD 21251.
authors.forename: Yucheng
authors.initials: Y
authors.lastname: Lan
authors.affiliation: Department of Physics, Boston College, Chestnut Hill, MA 02467.
authors.forename: Chunhua
authors.initials: C
authors.lastname: Li
authors.affiliation: Department of Physics, University of Houston, Houston, TX 77204.|Texas Center for Superconductivity at the University of Houston, University of Houston, Houston, TX 77204.
authors.forename: Jing
authors.initials: J
authors.lastname: Shuai
authors.affiliation: Department of Physics, University of Houston, Houston, TX 77204.|Texas Center for Superconductivity at the University of Houston, University of Houston, Houston, TX 77204.
authors.forename: Hee Seok
authors.initials: HS
authors.lastname: Kim
authors.affiliation: Department of Physics, University of Houston, Houston, TX 77204.|Texas Center for Superconductivity at the University of Houston, University of Houston, Houston, TX 77204.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Department of Physics, Boston College, Chestnut Hill, MA 02467.
authors.forename: David
authors.initials: D
authors.lastname: Broido
authors.affiliation: Department of Physics, University of Houston, Houston, TX 77204; cwchu@uh.edu gchen2@mit.edu zren@uh.edu.|Texas Center for Superconductivity at the University of Houston, University of Houston, Houston, TX 77204.|Lawrence Berkeley National Laboratory, Berkeley, CA 94720.
authors.forename: Ching-Wu
authors.initials: CW
authors.lastname: Chu
authors.affiliation: Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139; cwchu@uh.edu gchen2@mit.edu zren@uh.edu.
authors.forename: Gang
authors.initials: G
authors.lastname: Chen
authors.affiliation: Department of Physics, University of Houston, Houston, TX 77204; cwchu@uh.edu gchen2@mit.edu zren@uh.edu.|Texas Center for Superconductivity at the University of Houston, University of Houston, Houston, TX 77204.
authors.forename: Zhifeng
authors.initials: Z
authors.lastname: Ren
keywords: carrier mobility; half-Heusler; output power density; power factor; thermoelectric