根据傅里叶热传导理论和热应力场理论,利用COMSOL仿真软件和Matlab软件构建了复合激光辐照下三结GaAs太阳能电池的复合损伤模型,计算了单毫秒激光和复合脉冲激光辐照下太阳能电池的温度和应力场分布。结果表明,相比单毫秒激光,复合激光辐照会产生更大范围的熔化损伤并且伴随出现明显的应力损伤,损伤面积和深度会随着纳秒脉冲激光能量密度和作用时间延时的增加而增加。能量密度增加到0.5 J/cm 2时,熔化损伤半径增大到2 mm,深度增大到1.5 μm;时间延时增加到0.5 ms时,熔化损伤半径增大到1.4 mm,深度增大到1 μm。

According to the Fourier heat conduction theory and thermal stress field theory, the COMSOL simulation software and Matlab software are used to construct the combined damage model of three-junction GaAs solar cell under combined laser irradiation, and the temperature and stress field distribution of solar cell under single millisecond laser irradiation and combined pulse laser irradiation are calculated. The results show that, compared with single-millisecond laser, the combined laser irradiation can produce a wider melting damage area and obvious stress damage, and the damage area and depth will increase with the increase of energy density and action time delay of nanosecond pulse laser. When the energy density increases to 0.5 J/cm ², the radius and the depth of the melting damage spot are risen to 2 mm and 1.5 μm, respectively. When the time delay increases to 0.5 ms, the radius and the depth are increased to 1.4 mm and 1 μm, respectively.