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- W2045000508 abstract "The effect of excitonic absorption on solar cell efficiency has been investigated using solar cells with AlGaAs/GaAs superlattice structures. Numerical calculations reveal that excitonic absorption considerably enhances the overall absorption of bulk GaAs. Excitonic absorption shows strong and sharp peaks at the absorption edge and in the energy region above the band gap. Absorption enhancement is also achieved in the AlGaAs/GaAs superlattice. The measured quantum efficiency spectra of the superlattice solar cells are quite similar to the calculated absorption spectra considering the excitonic effect. The superlattice solar cells are confirmed to have high absorption coefficient compared with the GaAs and AlGaAs bulk solar cells. These results suggest that the enhanced absorption by excitons can increase the quantum efficiency of solar cells. This effect is more prominent for the solar cells with small absorption layer thicknesses." @default.
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- W2045000508 date "2013-11-01" @default.
- W2045000508 modified "2023-09-27" @default.
- W2045000508 title "High-Absorption-Efficiency Superlattice Solar Cells by Excitons" @default.
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- W2045000508 doi "https://doi.org/10.7567/jjap.52.112302" @default.
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