High Operating Temperature, Radiation-Hard MIM Thermophotovoltaic Converters, Phase I

Metadata Updated: May 2, 2019

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.

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Public: This dataset is intended for public access and use. License: U.S. Government Work

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Metadata Created Date August 1, 2018
Metadata Updated Date May 2, 2019

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date May 2, 2019
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_5680
Maintainer Email
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://data.nasa.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Datagov Dedupe Retained 20190501230127
Harvest Object Id 8e69f233-9ebb-44b8-bfbf-8e6e4aea8611
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2006-07-01
Homepage URL https://techport.nasa.gov/view/5680
License http://www.usa.gov/publicdomain/label/1.0/
Data Last Modified 2018-07-20
Program Code 026:027
Source Datajson Identifier True
Source Hash ea9aab99568e75d153132d2c87cdda2f9a6ad3a6
Source Schema Version 1.1

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