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High Operating Temperature, Radiation-Hard MIM Thermophotovoltaic Converters

Award Information

Agency:
National Aeronautics and Space Administration
Branch:
N/A
Award ID:
77680
Program Year/Program:
2006 / SBIR
Agency Tracking Number:
054979
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
SPIRE CORPORATION
1 PATRIOTS PARK BEDFORD, MA 01730-2396
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 2006
Title: High Operating Temperature, Radiation-Hard MIM Thermophotovoltaic Converters
Agency: NASA
Contract: NNC06CA63C
Award Amount: $69,386.00
 

Abstract:

Spire Corporation proposes to investigate InGaAs thermophotovoltaic (TPV) cells optimized for high temperature operation (150C) and radiation hardness against the 1.64MeV neutron flux likely from plutonium dioxide general purpose heat sources. We propose to develop a temperature-dependent TPV cell model and select an optimum bandgap for 150C operation with a 1100C heat spectrum, using a cell design with a thin (1 micron vs standard 3 micron) base that improves tolerance to diffusion length degradation from radiation. In order to increase photon absorption in this thin cell, we propose to epitaxially grow a monolithic 15 period InGaAs/InAlAs Bragg mirror to reflect about 90% of the incident usable (2 micron wavelength) photons back through the cell. The proposed advantage of the Bragg over a standard back metal mirror reflector is that the dielectric mirror has some ability to use strain exerted at the interfaces of the different mirror materials as a threading-to-misfit dislocation filter to further enhance the cell efficiency. We also propose to examine polyimide along with standard SiN for MIMs (monolithically integrated multijunction module) edge passivation.

Principal Investigator:

Steven J. Wojtczuk
Principal Investigator
7812756000
swojtczuk@bandwidthsemi.com

Business Contact:

Mark C. Little
CEO, Spire Biomedical
7812756000
mlittle@spirecorp.com
Small Business Information at Submission:

Spire Corporation
One Patriots Park Bedford, MA 01730

EIN/Tax ID: 042457335
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No