DocumentCode
3031883
Title
Radiation response of dual-junction GayIn1-yP/Ga1-xInxAs solar cells
Author
Dimroth, F. ; Bett, A.W. ; Walters, R.J. ; Summers, G.P. ; Messenger, S.R. ; Takamoto, T. ; Ikeda, E. ; Imaizumi, M. ; Anzawa, O. ; Matsuda, S.
Author_Institution
Fraunhofer-Inst. fur Solare Energiesysteme, Freiburg, Germany
fYear
2000
fDate
2000
Firstpage
1110
Lastpage
1113
Abstract
The radiation response of dual-junction GayIn1-y P/Ga1-xInxAs solar cells grown with 0.35<y<0.51 and 0.01<x<0.17 is presented. These lattice-mismatched structures were grown by metal-organic-vapor-phase-epitaxy on GaAs or Ge substrates. Measurement of the photovoltaic output of the cells made under simulated one-sun, AM0 spectral conditions shows that the new dual-junction GaxIn1-xP/GayIn1-yAs cells perform as well or better than commercially available multijunction cells. Measurement of the quantum efficiency gives insight into which subcell determines the total cell degradation under proton irradiation. As has been found previously for the GayIn1-yP/GaAs tandem cell, degradation of the new GayIn1-yP/Ga1-xInxAs material combination is controlled by the bottom solar cell. Analysis of the irradiation data is used to determine the basic mechanisms governing the radiation response of these devices, including the effect of stoichiometry, lattice-mismatch and cell structure
Keywords
III-V semiconductors; chemical beam epitaxial growth; gallium compounds; indium compounds; p-n heterojunctions; proton effects; semiconductor epitaxial layers; solar cells; stoichiometry; GaAs; GaAs substrates; GaInP-GaInAs; Ge; Ge substrates; bottom solar cell; cell structure; dual-junction GayIn1-yP/Ga1-xIn xAs solar cells; lattice-mismatched structures; metal-organic-vapor-phase-epitaxy; photovoltaic output measurement; proton irradiation; quantum efficiency measurement; radiation response; simulated one-sun AM0 spectral conditions; stoichiometry; subcell; total cell degradation; Degradation; Epitaxial growth; Gallium arsenide; Lattices; Photonic band gap; Photovoltaic cells; Photovoltaic systems; Solar energy; Solar power generation; Substrates;
fLanguage
English
Publisher
ieee
Conference_Titel
Photovoltaic Specialists Conference, 2000. Conference Record of the Twenty-Eighth IEEE
Conference_Location
Anchorage, AK
ISSN
0160-8371
Print_ISBN
0-7803-5772-8
Type
conf
DOI
10.1109/PVSC.2000.916081
Filename
916081
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