PERC背钝化结构提升多晶硅太阳电池的光电转换性能研究

Enhanced Power Conversion Performance of Multi-crystalline Silicon Solar Cells with PERC Structure

摘要:

在工业产线上制备了PERC结构的多晶硅太阳电池,并研究了在电池背表面引入PERC背钝化结构对其光电转换性能的影响。结果表明:PERC背钝化结构能够提升电池的短路电流和开路电压,光电转换效率超过了20%。结合光学仿真及分析电池的关键光电参数知,其光电转换性能改善的原因可归结为PERC背钝化结构降低了长波太阳光子在背铝电极的寄生吸収损失和光生载流子的背表面复合损失。PERC背钝化结构能够提升多晶硅太阳电池的光电转换效率,并且其制备工艺与传统产线兼容,是一种优选的产业电池结构。

Abstract:

Multi-crystalline silicon (mc-Si) solar cells with passivated emitter and rear cell (PERC) structure were successfully fabricated on an industrial production line, and the effects of PERC structure on the power conversion performance of the solar cells were studied. The results indicate that, the PERC mc-Si solar cells exhibit an enhanced short-circuit current and open-circuit voltage, resulting in high power conversion efficiency of up to 20.14%. The enhanced optoelectronic conversion can be attributed to the reduced parasitic absorption loss of long wavelength photons and reduced recombination of charge carriers on the rear surface of PERC mc-Si solar cells. The PERC structure can improve the conversion efficiency of mc-Si solar cells, and can be compatible with traditional process, thus it can be regarded as an optimal cell structure.