PERC单晶硅太阳电池EL图像边缘发黑原因的研究

RESEARCH ON CAUSES OF EDGE BLACKENING OF EL IMAGE OF PERC MONO-Si SOLAR CELL

本文以PERC单晶硅太阳电池电致发光(EL)图像边缘发黑现象为研究对象,推测造成其EL图像边缘发黑的原因,并通过相关测试进行了原因验证。验证结果表明:制绒机烘干槽被NaOH污染是导致PERC单晶硅太阳电池EL图像出现边缘发黑的原因,通过调节机械手的参数、减少烘干槽中碱性液体的带入、优化制绒机内部的排风、减少制绒槽中NaOH蒸汽到烘干槽过程中的挥发、对烘干槽进行定期维护与清理等措施,可以杜绝此类EL图像边缘发黑的PERC单晶硅太阳电池的产生,从而可提高该太阳电池生产线的良品率。

In this paper,the phenomenon of edge blackening of EL image of PERC mono-Si solar cells is the research object,speculates the reason for the edge blackening of the EL image,and verifies the reason through related tests.The verification result shows:the drying tank of the texturing machine contamination by NaOH is the reason for the edge blackening of the EL image of PERC mono-Si solar cells.By adjusting the parameters of the manipulator,reducing the introduction of alkaline liquid in the drying tank,optimizing the exhaust air inside the texturing machine,and reducing the volatilization of NaOH steam from the texturing tank to the drying tank,and the regular maintenance and cleaning of the drying tank,can prevent the generation of PERC mono-Si solar cells with edge blackening of the EL image and improve the yield of solar cell production lines.