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