连续激光对三结GaAs电池的损伤效应

Irradiation Effect of Continuous-Wave Laser on Triple-Junction GaAs Solar Cells

在空气中和真空中,利用波长为1070nm的连续(CW)激光辐照三结砷化镓(GaAs)太阳电池,通过测试激光辐照前后电池的电流-电压曲线,并利用激光诱导电流(LBIC)成像系统和X射线光电子能谱仪(XPS),研究了三结GaAs太阳电池的损伤情况。结果表明,当激光功率密度为8.4 W/cm2、辐照时间为10s时,在空气中,底电池Ge熔融短路;在真空中,顶电池Ga0.5In0.5P和底电池Ge均发生短路,说明三结GaAs太阳电池的底电池最容易受到破坏,且电池在真空中比在空气中更容易受到损伤。该研究结果可为三结GaAs太阳电池的激光无线能量传输和损伤机理的研究提供一定的参考。

In the air and the vacuum, triple-junction gallium arsenide （GaAs） solar cells are irradiated by the 1070 nm continuous-wave （CW） laser and the current-voltage curves of cells before and after laser irradiation are tested. By using the laser beam induced current （LBIC） measuring system and the X-ray photoelectron spectrometer （XPS）, the damage situations of triple-junction GaAs solar cells are analyzed. The results show that, when the laser power density is 8.4 W/cm2 and the irradiation time is 10 s, the bottom-cell Ge is fused and short-circuited in the air, and the top-cell Ga0.5 In0 5 P and the bottom-cell Ge are both short-circuited in the vacuum, which means the bottom-cell of triple-junction GaAs solar cells is the most easily damaged part and the cell is easier to be destroyed in the vacuum than in the air. These study results can provide references for the research on laser wireless energy transmission and the laser damage mechanisms of triple-junction GaAs solar cells.