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- W2000880907 abstract "GaAs p-i-n solar cells embedded with varying number of QD layers (0-60) were grown by OMVPE. 1x1 cm<sup>2</sup> cells were fabricated and standard solar cell testing was performed. Illuminated AM0 current-voltage characteristics were measured of both a baseline and 10-layer quantum dot (QD) embedded GaAs <i>p-i-n</i>. The QD solar cell (QDSC) gave an short circuit current of 23.1 mA/cm<sup>2</sup> increase in of 0.7mA/cm<sup>2</sup> above the baseline with no QDs. The QD embedded cell also showed limited loss in open circuit voltage characteristics of 0.99 V compared to 1.04 V of the baseline. Conversion efficiencies were 13.4 and 13.8 for the QDSC and baseline solar cell, respectively. Spectral responsivity measurements revealed equivalent GaAs response in the visible for the baseline, 10x and 20x layer QD samples, while systematically degraded emitter lifetime was found to be responsible for loss in visible responsivities for the 60x QDSC. Sub-GaAs bandgap response gave a systematic increase of 0.25 mA/QD layer. Spectral responsivity modeling was used and found that bulk GaAs emitter and i-region lifetimes degraded from 10<sup>2</sup> ns to 10<sup>2</sup> ps, with increasing number of QD layers." @default.
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- W2000880907 date "2011-02-10" @default.
- W2000880907 modified "2023-09-25" @default.
- W2000880907 title "Investigation of spectral responsivity of InAs QD-embedded GaAs solar cells" @default.
- W2000880907 doi "https://doi.org/10.1117/12.880499" @default.
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