Researchers from Longi and Yangzhou University developed a laser-based manufacturing strategy to mitigate shock-wave-induced damage in HJT back-contact solar cells, improving passivation stability and device performance. The approach yields a certified 27.27% efficient solar cell and provides an industrially viable pathway toward ultra-high-efficiency photovoltaic fabrication.
A group of researchers from Chinese PV manufacturer Longi and China’s Yangzhou University has developed a new manufacturing technique to mitigate laser shock waves in the production of heterojunction (HJT) back-contac (BC) solar cells in an effort to reduce potential damage.
“Our work not only addresses a major contradiction in laser-based manufacturing but also offers a practical, industry-ready route toward ultra-high-efficiency photovoltaics,” corresponding author Lvzhou Li told pv magazine. “Laser processing plays a central role in modern photovoltaic manufacturing, providing benefits in throughput, precision, and patterning flexibility. However, at high energy densities, the interaction between ultrafast laser pulses and silicon can trigger non-thermal processes that produce instantaneous, high-pressure shock waves.”
