HIGH TEMPERATURE SURVIVABLE CONTACTS FOR GALLIUM ARSENIDE SPACE SOLAR CELLS

Award Information
Agency: Department of Defense
Branch: Missile Defense Agency
Contract: N/A
Agency Tracking Number: 8349
Amount: $299,000.00
Phase: Phase II
Program: SBIR
Awards Year: 1990
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Astrosystems Inc.
30 Lovett Ave, Newark, DE, 19711
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 James B Mcneely
 (302) 366-0400
Business Contact
Phone: () -
Research Institution
N/A
Abstract
EXISTING METALLIC-TYPE CONTACTS ON GALLIUM ARSENIDE (GAAS) HAVE NOT BEEN STABLE AT HIGH TEMPERATURES BECAUSE OF INTERDIFFUSION AND/OR ALLOYING OF THE GAAS TOP LAYER. HIGH TEMPERATURE CONTACTS TO GAAS SPACE PHOTOLTAIC CELLS ARE BEING DEVELOPED BASED ON THE FORMATION OF A HIGHLY-STABLE INTERMEDIATE DEGENERATE SEMICONDUCTOR LAYER BETWEEN THE GAAS AND A HIGH TEMPERATURE METAL ALLOY. THE INTERMEDIATE SEMICONDUCTOR APPROACH LEADS TO THE BEST HIGH TEMPERATURE PERFORMANCE BECAUSE IT USES A METAL WHICH IS A SEMICONDUCTOR RATHER THAN ALLOYING WITH THE GAAS. UNDER THIS APPROACH, BOTH THE INTERMEDIATE SEMICONDUCTOR LAYER AND THE CONTACT METAL ARE EXPECTED TO REMAIN STABLE AT TEMPERATURES IN EXCESS OF 600 DEGREES C. THIS CONTACT WILL MAKE POSSIBLE NEW, HIGHER CONCENTRATION SOLAR CONCENTRATOR DESIGNS BOTH FOR SPACE AND TERRESTRIAL USE INCLUDING OTHER SEMICONDUCTOR DEVICES AND ADVANCED OPTOELECTRONIC DEVICES.

* information listed above is at the time of submission.

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