Transport coefficients and thermoelectric figure of merit of [ital n]-Hg[sub 1[minus][ital x]]Cd[sub [ital x]]Te
- Solid State Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831-6030 (United States) Department of Physics and Astronomy, The University of Tennessee, Knoxville, Tennessee 37996-1200 (United States)
- Fraunhofer-Institut fuer Angewandte Festkoerperphysik, Tullastrasse 72, D-79108 Freiburg (Germany)
The conductivity, Hall coefficient, and thermopower of Hg[sub 1[minus][ital x]]Cd[sub [ital x]]Te (MCT) are calculated for 0[lt][ital x][lt]0.3 at temperatures below 400 K and donor doping lower than 10[sup 19] cm[sup [minus]3]. The results are obtained by solving the Boltzmann equation with the iteration method, including scattering of the carriers by ionized impurities, optical and acoustic phonons, and alloy potential. The agreement between the calculation and a large amount of compiled experimental data is excellent for bulk samples and thick films grown by molecular-beam epitaxy. Using tabulated data for the thermal conductivity the thermoelectric figure of merit [ital Z] is calculated, and in the most favorable conditions of doping and composition [ital ZT] is less than 0.33 at [ital T]=300 K. The potential for increasing the [ital ZT] of MCT is discussed.
- OSTI ID:
- 7070564
- Journal Information:
- Journal of Applied Physics; (United States), Vol. 76:4; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CADMIUM TELLURIDES
THERMOELECTRIC PROPERTIES
MERCURY TELLURIDES
BOLTZMANN EQUATION
CARRIER MOBILITY
DOPED MATERIALS
ELECTRIC CONDUCTIVITY
IMPURITIES
PHONONS
SCATTERING
TEMPERATURE RANGE 0273-0400 K
THERMAL CONDUCTIVITY
CADMIUM COMPOUNDS
CHALCOGENIDES
DIFFERENTIAL EQUATIONS
ELECTRICAL PROPERTIES
EQUATIONS
MATERIALS
MERCURY COMPOUNDS
MOBILITY
PARTIAL DIFFERENTIAL EQUATIONS
PHYSICAL PROPERTIES
QUASI PARTICLES
TELLURIDES
TELLURIUM COMPOUNDS
TEMPERATURE RANGE
THERMODYNAMIC PROPERTIES
360606* - Other Materials- Physical Properties- (1992-)
665520 - Other Methods of Direct Energy Conversion- (1992-)