抄録
Optical wireless transmission has attracted interest for applications, such as space solar power system and
power transmission to a moving object. The 1.06-μm wavelength range affords higher transmissivity and
a higher laser power than other wavelengths for long-distance atmospheric energy transmission. This
wavelength range also supports optical fiber power transmission. In this study, we fabricated an InGaAsP
photovoltaic device structure by using metal-organic vapor-phase epitaxy and investigated the electrode
shape dependence of the device characteristics under laser irradiation. We measured the electrode width
dependence of the current–voltage characteristics under 1.06-μm laser irradiation and compared a meshshaped
electrode with a mesh-shaped electrode having an outer ring electrode. We found that having a
large mesh electrode width and the use of an outer ring electrode effectively increased the fill factor. The
maximum power conversion efficiency of a fabricated device without an anti-reflection coating was 20.3%.
