Gallium arsenide solar cells can achieve a photoelectric conversion efficiency of 30% to 33% under the AM0 standard solar spectrum and at 25℃. They are characterized by high photoelectric conversion efficiency, strong adaptability to space environments, and high reliability. As core energy devices for spacecraft, they are widely used in various satellites such as communication, remote sensing, navigation, and telemetry and control satellites, as well as in space probes, landers, space stations, and other aerospace platforms, providing stable and efficient energy supply for on-orbit missions.