Thermopower and Electrical Conductivity of PbSe Nanocrystal Thin Films

ORAL

Abstract

Thin films assembled of solution-processed PbSe nanocrystals have a thermopower 2 -- 3 times greater than bulk PbSe. In addition, the thermopower and electrical conductivity both exhibit a size-dependence on nanocrystal size. As the nanocrystal diameter changes from 4 to 9 nm, the thermopower and electrical conductivity change from 850 to 650 $\mu $V/K and 10$^{-4}$ to 10$^{-2}$ S/cm, respectively. If electrical conductivity can be improved, these materials represent a new class of inexpensive and scalable thermoelectric materials.

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Authors

  • Robert Wang

    • University of California, Berkeley

  • Joseph Feser

    • University of California, Berkeley

  • Jong-Soo Lee

    • University of Chicago

  • Dmitri Talapin

    • University of Chicago

  • R.A. Segalman

    • UC Berkeley
    • UC Berkeley and Lawrence Berkeley National Laboratories
    • University of California Berkeley and Lawrence Berkeley National Lab
    • University of California, Berkeley
    • Chem. Eng. UC Berkeley
    • University of California Berkeley

  • Arun Majumdar

    • UC Berkeley
    • Mech. Eng, UC Berkeley
    • University of California, Berkeley