Solar cells for NASA RAINBOW concentrator

The RAINBOW concentrator system is based on a concept of splitting the solar spectrum and focussing each portion on a solar cell having a bandgap matching the input spectral portion. Efficiencies over 40% are predicted for systems using a four-bandgap cell assembly under 20/spl times/ concentration....

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Main Authors: Smith, M.A., Sinharoy, S., Weizer, V.G., Khan, O., Pal, A., Clark, E.B., Wilt, D.M., Scheiman, D.A., Mardesich, N.
Format: Conference Proceeding
Language:English
Subjects:
Gallium arsenide
Indium gallium arsenide
Indium phosphide
Materials testing
NASA
Optical arrays
Optical filters
Photonic band gap
Photovoltaic cells
Solar power generation
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creator Smith, M.A.
Sinharoy, S.
Weizer, V.G.
Khan, O.
Pal, A.
Clark, E.B.
Wilt, D.M.
Scheiman, D.A.
Mardesich, N.
description The RAINBOW concentrator system is based on a concept of splitting the solar spectrum and focussing each portion on a solar cell having a bandgap matching the input spectral portion. Efficiencies over 40% are predicted for systems using a four-bandgap cell assembly under 20/spl times/ concentration. Reported here are the results of materials growth, processing, and testing of four different solar cells designed to populate the RAINBOW testbed, under development at JPL. The cells are 0.74-eV InGaAs on lattice-matched InP, 1.1-eV InGaAs on lattice-mismatched GaAs, 1.43-eV GaAs on GaAs, and 1.85-eV InGaP on lattice-matched GaAs. Quantum efficiencies between 0.8 and 1.0 have been realized for the spectral region from 0.5 to /spl sim/1.5 /spl mu/m.
doi_str_mv 10.1109/PVSC.2000.916088
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source IEEE Electronic Library (IEL) Conference Proceedings
subjects Gallium arsenide
Indium gallium arsenide
Indium phosphide
Materials testing
NASA
Optical arrays
Optical filters
Photonic band gap
Photovoltaic cells
Solar power generation
title Solar cells for NASA RAINBOW concentrator
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