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Thermoelectric Cooling of Photodetector Arrays with HgCdTe-based Superlattices

Award Information

Agency:
Department of Defense
Branch:
Army
Award ID:
74164
Program Year/Program:
2005 / STTR
Agency Tracking Number:
A054-013-0046
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
EPIR Technologies Inc
590 Territorial Drive, Suite B Bolingbrook, IL -
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 2005
Title: Thermoelectric Cooling of Photodetector Arrays with HgCdTe-based Superlattices
Agency / Branch: DOD / ARMY
Contract: W911NF-05-C-0090
Award Amount: $99,952.00
 

Abstract:

The most challenging degrading effect on current state-of-the-art focal plane arrays is caused by the random spatial and temporal photoresponse nonuniformity of the pixels. We propose a major improvement by controlling the temperature of individual pixels with individual thermoelectric coolers. We will use HgxCd1-xTe/HgyCd1-yTe superlattices (SLs) as the thermoelectric material. Two major benefits lead us to this choice. First, HgCdTe, the principal material used in infrared photon imaging applications, can be directly grown on HgxCd1-xTe/HgyCd1-yTe SLs, making the integration of infrared sensors and thermoelectric elements possible. Second, a recent model showed that a Hg0.75Cd0.25Te/Hg0.7Cd0.3Te SL can achieve a thermoelectric figure of merit ZT of 1.99, two times greater than that of current thermoelectric devices based on Bi2Te3. In Phase I, we will develop an accurate model of the thermoelectric properties of HgxCd1-xTe/HgyCd1-yTe SL structures and we will optimize the material parameters to maximize ZT. Next, we will address the growth of HgxCd1-xTe/HgyCd1-yTe SLs by partnering with the University of Illinois at Chicago, which has extensive experience with the growth of HgTe/CdTe SLs and HgCdTe. Finally, we will develop device structures and metallization methods for performing ZT measurements, measure ZTs of the devices and compare them to theory.

Principal Investigator:

Silviu Velicu
Senior Engineer
6307710206
svelicu@epir.com

Business Contact:

Sivalingam Sivananthan
President
6307710201
siva@epir.com
Small Business Information at Submission:

Epir Technologies, Inc.
590 Territorial Drive, Suite B Bolingbrook, IL 60440

EIN/Tax ID: 364196918
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Research Institution Information:
UNIV. OF ILLINOIS AT CHICAGO
Department of Physics, 845 W. Taylor St.
Chicago, IL 60607
Contact: Yong Chang
Contact Phone: (312) 413-0041
RI Type: Nonprofit college or university