Laser-patterned poly-Si finger contacts reduce parasitic absorption, improve efficiency in TOPCon solar cells - pv magazine Global

Researchers in China developed a laser-assisted poly-Si finger contact fabrication method combining picosecond laser modification and potassium hydroxide wet etching to reduce parasitic absorption in industrial TOPCon solar cells. The optimized process achieved a certified efficiency of 26.08% by improving optical performance while maintaining effective passivation and carrier transport.

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