RESONANT DOPED BISMUTH TELLURIDE FOR RELIABLE, EFFICIENT CRYOCOOLING

Award Information
Agency:
Department of Defense
Branch
Army
Amount:
$48,860.00
Award Year:
1992
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Award Id:
18519
Agency Tracking Number:
18519
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
10451 Vista Park Road, Dallas, TX, 75238
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
E. H. Volckmann
(214) 340-4900
Business Contact:
() -
Research Institution:
n/a
Abstract
THE UTILITY OF RELIABLE, SOLID-STATE, THERMOELECTRIC COOLING TECHNOLOGY CAN BE EXTENDED TO CRYOGENIC TEMPERATURES (77 DEGREES K) THROUGH THE USE OF NEW THERMOELECTRIC MATERIALS. A UNIQUE AND INNOVATIVE APPROACH TO IMPROVED THERMOELECTRIC MATERIALS CAPABLE OF TRIPLING THE THERMOELECTRIC FIGURE OF MERIT OF BISMUTH-TELLURIDE- BASED THERMOELECTRIC MATERIALS IS PROPOSED. IN ADDITION TO THE CON- VENTIONAL DOPANTS USED TO CREATE CHARGE CARRIERS IN BISMUTH TELLU- RIDE, ADDITIONAL DOPANTS WILL BE INTRODUCED WHICH, THROUGH RESONANT SCATTERING OF THE CHARGE CARRIERS, PRODUCE A DRAMATIC IMPROVEMENT IN THE SEEBECK COEFFICIENT AND THEREFORE IN THE ABILITY OF THE MATERIALS TO CONVERT INPUT ENERGY INTO COOLING POWER. THE PHYSICAL PROPERTIES OF THE MATERIALS WILL BE LITTLE ALTERED AND THEREFORE PRACTICAL CRYO- COOLING DEVICES MAY BE DEVELOPED RELATIVELY EASILY FROM THESE ADVANCED BISMUTH TELLURIDE MATERIALS. EXTENSION OF THERMOELECTRIC COOLING TO CRYOGENIC TEMPERATURES IS EXPECTED TO BE USEFUL TO A WIDE VARIETY OF APPLICATIONS INCLUDING INFRARED SENSORS.

* information listed above is at the time of submission.

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