Fig. 2
From: Optimization of GaAs Nanowire Pin Junction Array Solar Cells by Using AlGaAs/GaAs Heterojunctions
a The absorption spectra of the GaAs nanowire and its AlGaAs/GaAs counterparts with axial and radial heterostructures. The vertical cross section of optical generation profiles in the b AlGaAs/GaAs axial heterostructure nanowire, c AlGaAs/GaAs radial heterostructure nanowire, and d GaAs nanowire. e The absorption spectra of the intrinsic regions in GaAs nanowire axial pin junction solar cells and its AlGaAs/GaAs counterparts. f The absorption spectra of the intrinsic regions in GaAs nanowire radial pin junction solar cells and their AlGaAs/GaAs counterparts