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

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

Researchers from China’s Yangzhou University have developed a laser-modification–assisted wet-etching process to fabricate rear poly-finger contacts for industrial TOPCon solar cells. “Our work proposes a manufacturable poly-finger rear patterning strategy combining picosecond laser modification and precision potassium hydroxide (KOH) wet etching to boost the efficiency of industrial n-type TOPCon solar cells,” corresponding author Qinqin Wang t…