利用正交实验法探究掺硼p型单晶硅PERC电池的电致复原最优条件

Optimization of electrical injection regeneration conditions of boron-doped p-type monocrystalline silicon PERC solar cells by orthogonal experiment method

为了减小掺硼p型单晶硅PERC电池的光衰,利用正交实验方法对其电注入复原处理条件进行了最优化研究。采用VS-6821M型太阳电池I-V特性测试仪测量PERC电池在复原处理前后及随后12 h光衰过程中效率的变化,以光衰12 h后的效率与复原处理前的效率的比值作为衡量复原处理工艺优劣的指标。三水平正交实验结果表明,不论是否考虑交互作用,在所研究的参数范围(10~30 min,140~200℃,6~18 A),电注入复原处理最优条件均为30 min,170℃,18 A。在此基础上,利用五水平正交实验进一步将电注入复原处理的最优条件优化为30 min,175℃,18 A。经最优化条件复原处理的电池相对于复原处理前的初始效率有1%~2%的增益,且电池效率在1 Sun光强、45℃、12 h光衰过程中基本保持稳定,12 h光衰后的效率比初始效率也有约1%的增益。

Orthogonal experimental method was used to optimize the electrical injection regeneration conditions of boron-doped p-type monocrystalline silicon PERC solar cells to decrease their LID(light induced degradation)effects.The variation of efficiencies of the PERC solar cells before and after regeneration and during the subsequent 12 h LID was measured by a VS-6821M solar cell I-V tester,and the ratio of the efficiency after 12 h LID to the initial efficiency before regeneration was used as the standard for discerning good regeneration condition from bad one.Three-level orthogonal experimental results show that whether the interaction is considered or not,the optimal regeneration conditions are both 30 min,170℃,18 A under the studied parameter range(10-30 min,140-200℃,6-18 A).On this basis,the optimal regeneration condition was further optimized to 30 min,175℃,18 A by using five-level orthogonal experiments.The efficiency of a PERC solar cell regenerated using the optimal processing condition increases by 1%-2%relative to the initial value before regeneration,and remains stable in the following 12 h light soaking at 1 Sun light intensity and 45℃,and the efficiency after 12 h LID process is still about 1%higher than the initial efficiency.