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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 2015Passivating 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-aSiH 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 – NewTNConclusion 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-NewTN to be in market by end of 2021.THE POWER OF RISING VALUE www.risenenergy.com NewTN, New Type, New Era
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