26.35%-Efficiency and high-bifaciality n-TOPCon solar cells enabled by UV-ps laser-induced selective modification of double-layered SiOx/n+-poly-Si passivating contacts

Double-layered SiO x /n + -poly-Si films with laterally modulated thickness applied in TOPCon solar cells can reduced recombination, enhance contact quality, decrease risk of paste burn-through of the passivation layer and reduce parasitic absorption.