Compensating Cutting Losses by Passivation Solution for Industry Upgradation of TOPCon and SHJ Solar Cells

The main hurdle to the upgradation of photovoltaic industry is large performance losses that tunnel oxide passivated contact (TOPCon) and silicon heterojunction (SHJ) cells have during cutting separating process for assembly shingle solar panels. Here, an organic solution with passivation effect prepared in situ by a non-vacuum spraying process, which effectively compensates loss caused laser slicing technology. Both open-circuit voltage (Voc) power conversion efficiency (PCE) are improved. For example, after edge passivation, Voc PCE 3 × cm2 SHJ (K = 1.186%) cell increase up 8 mV 1–2% absolute efficiency, respectively. This passivation-solution based method can be easily integrated into current production line thus solve issue separated cells. study provides new technology compensate recombination on surface