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As an effort to improve the conversion efficiency of InGaP/InGaAs/Ge triple junction solar cells, we investigated the effect of AlGaAs barrier layer on the cell performance under concentrated light condition. Three different solar cells having upper tunnel junctions (TJs) as n ++ -GaAs/p ++ -AlGaAs layers, n ++ -GaAs/p ++ -GaAs layers and n ++ -GaAs/p ++...
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