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- W2019088575 abstract "Semiconductor nanowires (NWs) are good candidate for light-absorbing material in next generation photovoltaic and III–V NW-based multi-heterojunction solar cells using lattice-mismatched material system are expected as high energy-conversion efficiencies under concentrated light. Here we demonstrate core–shell GaAs NW arrays by using catalyst-free selective-area metal organic vapor phase epitaxy (SA-MOVPE) as a basis for multijunction solar cells. The reflectance of the NW array without any anti-reflection coating showed much lower reflection than that of a planar wafer. Next we then fabricated core–shell GaAs NW array solar cells with radial p–n junction. Despite the low reflectance, the energy-conversion efficiency was 0.71% since a high surface recombination rate of photo-generated carriers and poor ohmic contact between the GaAs and transparent indium–tin-oxide (ITO) electrode. To avoid these degradations, we introduced an InGaP layer and a Ti/ITO electrode. As a result, we obtained a short-circuit current of 12.7 mA cm -2 , an open-circuit voltage of 0.5 V, and a fill factor of 0.65 for an overall efficiency of 4.01%." @default.
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- W2019088575 date "2013-04-22" @default.
- W2019088575 modified "2023-10-18" @default.
- W2019088575 title "GaAs/InGaP Core–Multishell Nanowire-Array-Based Solar Cells" @default.
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- W2019088575 doi "https://doi.org/10.7567/jjap.52.055002" @default.
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