High-efficiency n-type silicon PERT bifacial solar cells with selective emitters and poly-Si based passivating contacts

•Top efficiency of 21.15% is reported on large-area n-PERT bifacial solar cells with front selective emitter and rear poly-Si based passivating contacts.•Laser doping is performed to reduce carrier recombination on front borosilicate glass surface based on conventional B-diffusion p+ emitter.•Effici...

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