Accession Number:

ADA458438

Title:

A Further Comparison of Solid-State Thermionic and Thermoelectric Refrigeration

Descriptive Note:

Conference paper

Corporate Author:

NEW SOUTH WALES UNIV SYDNEY (AUSTRALIA) SCHOOL OF PHYSICS

Report Date:

2005-01-01

Pagination or Media Count:

5.0

Abstract:

We show that the expressions for current and heat current calculated via the non-linearized ballistic and diffusive transport formalisms reduce to the same form for solid-state devices one electron mean free path in length. The materials parameters for thermionic and thermoelectric devices are also shown to be equal, rather than differing by a multiplicative constant. We derive a simple transport equation that includes both ballistic and diffusive contributions to the current, and, as an example, use this to calculate the maximum temperature difference obtainable for a piece of Bi2Te3 as a function of its length, from less than an electron mean-free path to much greater than a mean-free path. Finally we briefly discuss similarities and differences between thermionic and thermoelectric devices in the regime where device length is of the order of a mean-free path length.

Subject Categories:

  • Electrical and Electronic Equipment
  • Electricity and Magnetism
  • Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE