三结砷化镓太阳电池真空连续激光损伤效应

采用1 315 nm波长连续激光,在真空环境下辐照三结砷化镓太阳电池,通过对比辐照前后电池IV、QE等表征数据,研究三结砷化镓太阳电池的损伤效应,并对其损伤机理进行分析。结果表明:当激光功率密度为8 W/cm~2、辐照时间为60 s时,三结砷化镓太阳电池辐照后电性能下降显著,转化效率衰降超过70%。损伤机理是在热损伤与应力损伤的综合作用下,引起电池串联电阻(R_s)、并联电阻(R_(sh))的恶化,且Rsh是衡量电池损坏的关键指标。该结果可以为三结砷化镓太阳电池在激光损伤机理与无线能量传输方面的研究提供一定的参考。

Damage Effects of Tri-Junction GaAs Solar Cells Irradiated by Continuous-Wave Laser in Vacuum

The tri-junction gallium arsenide (GaAs) solar cells are irradiated by a continuous-wave laser with a wavelength of 1 315 nm in the vacuum. With comparisons of the characterization data such as the quantum efficiency (QE) and current-voltage (IV)parameters before and after irradiation, the damage effects of tri-junction GaAs solar cells are studied,and the mechanism is analyzed. The results show that when the laser power density is 8 W/cm2 and the irradiation time is 60 s, the electrical properties of tri-junction GaAs solar cells after irradiation significantly decrease, and the conversion efficiency degradation is over 70%. This damage is a combined thermal and stress damage, causing the series(Rs) and parallel (Rsh)resistances of the cells to deteriorate. Rsh is a key indicator for the solar cell damage. These results can provide some references for the research on the laser damage mechanism and laser wireless energy transmission of tri-junction GaAs solar cells.