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Electric field effect on thermoelectric properties of bismuth telluride square nanowires

I. BEJENARI1,2,* , V. KANTSER1, A.A. BALANDIN2

Affiliation

  1. Institute of Electronic Engineering and Industrial Technologies, Academy of Sciences of Moldova, Academiei St. 3/3, MD-2028 Chisinau, Moldova
  2. Department of Electrical Engineering and Materials Science and Engineering Program, University of California – Riverside, Riverside, California 92521 U.S.A

Abstract

We theoretically studied the influence of the applied electric filed on thermoelectric properties of intrinsic bismuth telluride nanowires, which are grown along [110] direction. The electronic structure and wave functions were calculated by solving the self-consistent system of the Schrődinger and Poisson equations by means of both the linearization of Poisson’s equation and the spectral element method. The thermoelectric parameters were calculated using a constant relaxation-time approximation. The external electric field can increase the Seebeck coefficient of a 7- and 15-nm-thick square nanowire by nearly a factor of two, and enhance the figure of merit by an order of magnitude..

Keywords

Electric Field Effect, Thermoelectric properties, Bismuth telluride nanowire.

Submitted at: April 7, 2010
Accepted at: April 26, 2010

Citation

I. BEJENARI, V. KANTSER, A.A. BALANDIN, Electric field effect on thermoelectric properties of bismuth telluride square nanowires, Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 4, pp. 900-903 (2010)