Fig. 1. Optical path diagram of the experimental system

Fig. 2. Structure of the GaAs solar cell. (a) Schematic diagram of the structure; (b) physical map

Fig. 3. I-V curve of the GaAs solar cell

Fig. 4. Photoelectric properties of GaAs solar cells. (a) Short circuit current; (b) open circuit voltage; (c) maximum output power; (d) photoelectric conversion efficiency

Fig. 5. Performance and material characterization of GaAs solar cells before and after laser irradiation. (a) I-V curve of GaAs solar cell; (b) XRD of GaAs solar cell

Fig. 6. SEM image of the laser-irradiated area of a GaAs solar cell. (a)‒(d) Area 1‒ area 4

Fig. 7. Luminescent properties of GaAs solar cells. (a) PL image of GaAs solar cell; (b) EL image of irradiated area; (c) PL image of unirradiated area; (d) PL image of irradiated area