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Computer modelling of aluminum-gallium arsenide/gallium arsenide multilayer photovoltaicsThe modeled cascade cells offer an alternative to conventional series cascade designs that require a monolithic intercell ohmic contact. Selective electrodes provide a simple means of fabricating three-terminal devices, which can be configured in complementary pairs to circumvent the attendant losses and fabrication complexities of intercell ohmic contacts. Moreover, selective electrodes allow incorporation of additional layers in the upper subcell which can improve spectral response and increase radiation tolerance. Realistic simulations of such cells operating under one-sun AMO conditions show that the seven-layer structure is optimum from the standpoint of beginning-of-life efficiency and radiation tolerance. Projected efficiencies exceed 26 percent. Under higher concentration factors, it should be possible to achieve efficiencies beyond 30 percent. However, to simulate operation at high concentration will require a model for resistive losses. Overall, these devices appear to be a promising contender for future space applications.
Document ID
19870020524
Acquisition Source
Legacy CDMS
Document Type
Thesis/Dissertation
Authors
Wagner, Michael Broderick
(Illinois Univ. Urbana-Champaign, IL, United States)
Date Acquired
September 5, 2013
Publication Date
January 1, 1987
Subject Category
Energy Production And Conversion
Report/Patent Number
NASA-CR-181418
NAS 1.26:181418
Accession Number
87N29957
Funding Number(s)
CONTRACT_GRANT: NAG3-507
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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