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A new type of hybrid solar cells based on a heterojunction between PEDOT:PSS and vertically-aligned n-type GaAs nanowire arrays is investigated. Such solar cells exhibit a power conversion efficiency of 3.46 %.
Large-area GaAs nanowires are fabricated by using SiO2 nanoparticles as a mask. SiO2 nanoparticle monolayer is spin-coated on the GaAs substrate and GaAs nanowires are etched by induced-coupled plasma reactive ion etcher.
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