Micro-dimensional GaSb photovoltaic converters of high-power density laser radiation

Investigations of the manufacturing technology of laser radiation ($\lambda$ = 1550 nm) photovoltaic converters, obtained by the two-stage Zn diffusion into $n$-GaSb substrate, with photosensitive region 30 $\mu$m and 80 $\mu$m in diameter have been carried out. Methods to reduce optical and ohmic losses of high-power density laser radiation (up to 1.6 kW/cm$^2$) conversion have been investigated. Laser radiation conversion efficiency more than 38% at photocurrent density 200–550 A/cm$^2$ was achieved.