Analysis of EL Card Dot Print Defects in TOPCon Batteries
This paper describes the difficulty and key of PE Poly in the N-type TOPCon solar cell process,and electroluminescence(EL)checkpoint printing is one of the main defects of the PE Poly route TOPCon battery.Based on the PE poly route TOPCon battery mass production equipment and process,it conducts classification research on EL defects in such batteries through electrical performance testing,ellipsometer testing,QE testing,and comparative experiments,providing improvement directions for improving the process yield of battery cells.
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