UNSW defines design guidelines for back-contact TOPCon solar cells

UNSW and DAS Solar used Quokka3 simulations to identify cut-induced losses in back-contact TOPCon cells, finding that gap-region cutting reduces efficiency losses by around 50% compared with emitter-region cutting. They recommend an optimized 0.3 mm gap width, particularly important under low irradiance, to minimize edge recombination and resistive losses without additional edge passivation.