Structure of PERC cell: Passivation/anti-reflection film - N-Type emitter - P-Type wafer substrate - back passivation layer - anti-reflection film

Structure of the N-Type TOPCon cell: Passivation/anti-reflection film - passivation layer - P-Type emitter - N-Type wafer substrate - ultrathin tunneling layer - N-Type polysilicon thin film - anti-reflection film

Main difference between N-Type TOPCon cell and PERC cell: N-Type silicon wafer + ultrathin tunneling layer

The production line of the N-Type TOPCon cell is highly compatible with the PERC cell. Compared to the PERC cell, an additional set of equipment is provided for the production line of current mainstream TOPCon cell to manufacture ultrathin tunneling layer and N-Type polysilicon thin film. The proven N-Type TOPCon cell technology has a lower investment cost than other N-Type cell technologies.