A 46.7% efficient GaInP photonic power converter under high-power 638 nm laser uniform irradiation of 1.5 W cm-2

Photonic power converters for optical wireless power transmission have challenged improving photoelectric conversion efficiency under high-power laser irradiation. We developed the efficiency under high-power irradiation by making the laser intensity distribution uniform and narrowing the distance L (mu m) between the comb-shaped electrodes on the converter cell surface. As a result, the GaInP converter cell with L = 234 mu m showed the highest conversion efficiency of 46.7% under uniform 638 nm laser irradiation of 1.5 W cm(-2). The exceeding 45.5% efficiencies under 1.0-6.2 W cm(-2) uniform 635 nm laser irradiation were also obtained in the GaInP converter cell with L = 106 mu m.

Automated summary

Researchers have improved the efficiency of photonic power converters under high-power laser irradiation by achieving a uniform laser intensity distribution and reducing the distance between electrodes on the converter cell surface. The GaInP converter cell showed the highest conversion efficiency under uniform laser irradiation of specific wavelength and power.