ABSTRACT This paper proposes a rapid and cost‐effective method to evaluate the corrosion resistance of front metal gridlines in TOPCon single‐glass solar modules. It addresses the failure risks of modules in humid, high‐temperature, and acidic environments, whereas traditional stability testing methods are time‐consuming and costly. This research employs an acetic acid ultrasonic corrosion test to simulate high‐temperature, high‐humidity conditions and electrolyte penetration, thereby rapidly accelerating the corrosion process for efficient assessment of metal gridline corrosion resistance. Compared to the conventional 96‐h pressure cooker test (PCT 96), the optimized acetic acid ultrasonic corrosion test requires only 5 min to yield valid results. Test results obtained from four representative TOPCon cells with different paste compositions align with the trends observed in their corresponding PCT 96 module tests. Thus, the cell‐level acetic acid ultrasonic corrosion test serves as an effective method for rapid evaluation of metal gridline corrosion resistance. Further elemental analysis reveals the underlying causes of performance differences, providing new insights and a theoretical basis for the screening and reliable design of corrosion‐resistant front‐side metal gridlines in TOPCon solar cell modules.
Ye et al. (Thu,) studied this question.
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