Mechanically stacked tandem cells consisting of GaAs thin-film upper cells and CuInSe2 thin-film lower cells have been developed to meet the increasing power needs projected for future spacecraft. The authors report the fabrication of the first highly efficient lightweight GaAs/CuInSe2 tandem cell on a 2-mil thick substrate, update recent performance improvements in thin-film GaAs/CuInSe2 tandem cells, and discuss their application to space power systems. The efficiency of 4-cm2 cells has improved to 21.6% AM0, the highest ever reported for a thin-film photovoltaic cell. Lightweight 4-cm2 tandem cells have been successfully fabricated with efficiencies as high as 20.8%. These cells weighed about 180 mg without optimized substrate trimming. Radiation and operating temperature effects on GaAs/CuInSe2 tandem cells are also discussed, and an interconnect scheme to form a voltage-matched string is described.
Lightweight (AlGaAs)GaAs/CuInSe2 tandem junction solar cells for space applications
Leichte (AlGaAs)GaAs/CuInSe2 Tandem-Solarzellen für Raumfahrtanwendungen
IEEE Aerospace and Electronics Systems Magazine ; 4 , 11 ; 23-32
1989
10 Seiten, 14 Quellen
Article (Journal)
English
Thin film tandem GaAs/CuInSe2 solar cells for space power applications
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