210大尺寸的N型电池效率及成本进展

17/09/2021 Progress in 210mm large-size N-type cell development Yimao Wan Ph.D Chief Scientist Conceptualisation of PV devices 2 U. Würfel, A. Cuevas and P. Würfel, IEEE JPV (2015)Passivating contacts: carrier selectivity concept 3 Carrier selectivity: • Selective collection of one carrier type at the contact How to measure it: • Contact recombination J 0c • Contact resistivity ρ cTypes of passivating contactsDirectly doped c-Si passivating contacts 5 Allen et al. Nature Energy 2019Directly doped c-Si passivating contacts 6 Allen et al. Nature Energy 2019Doped Si/interlayer passivating contacts? 7 Allen et al. Nature Energy 2019 • Doped polysilicon/SiOx • Doped amorphous silicon/i-aSi:H • Dopant free passivating contacts: Salts, carbonates, TMO, organic, and etc. • ρ c ~10 m Ωcm 2 • J 0c : ~1–20 fA/cm 28 Bullock J., Ph.D thesis., 2016PERC HJT TOPCONProgress in N-type cell development @ Risen 10 24.78% 23.76% 21.50% 22.00% 22.50% 23.00% 23.50% 24.00% 24.50% 25.00% 2020/6/18 2020/9/26 2021/1/4 2021/4/14 2021/7/23 2021/10/31 Efficiency Date G1-158.75mm G12-210mmWhen will N-type cell be competitive? 12 Yield 97% 97.9% 90% 97% Cell efficiency 22.8% 23.2% 23.6% 24.5% Cell cost Module cost System cost LCOE Ag consumption (mg/W) Wafer cost 5 3Cost of Ag consumption 13 2021H2 2022H1 2022H2 PERC-G1 PERC-G12 N-Cell G12 Reduced ~2.5mg/W 1mg/W440W Efficiency 22.9% Weight 21KG 540W Efficiency 22.5% Weight 27KG 700W Efficiency 22.5% Weight 34KG 210mm N-type product – NewT@NConclusion and outlook 15  Significant progress in N-type cell development:  Average efficiency: 24.78% @ G1; 23.76% @ G12, aim to achieve 24.5% by end of 2021  Ag consumption: reduced ~2.5mg/W by employing G12 210mm large wafers, and aim to achieve the gap between PERC and N-type within 1mg/W  210mm N-type product-NewT@N to be in market by end of 2021.THE POWER OF RISING VALUE www.risenenergy.com NewT@N, New Type, New Era