We have presented simplified industrial processes to fabricate high performance back‐junction back‐contact (BJBC) silicon solar cells. Good optical surface structures (solar averaged reflectance 2.5%) and high implied open‐circuit voltage (0.695 V) have been realized in the BJBC cell precursors through wet chemical processing, co‐diffusion, P ion implantation and annealing oxidation, as well as laser patterning and plasma enhanced chemical vapour deposition passivation processes. We have achieved a certified high efficiency of close to 22% on BJBC silicon solar cells with the size of 4.04 cm 2 by using screen printing and co‐firing technologies. The manufacturing process flow further successfully yields efficiency of around 21% BJBC silicon solar cells with enlarged sizes of 6 × 6 cm 2 . The present work has demonstrated that the commercialization of low‐cost and high‐efficiency BJBC solar cells is possible because we have used processes compatible with existing production lines. Copyright © 2017 John Wiley & Sons, Ltd. We have achieved a certified high efficiency of ~22% back‐junction back‐contact (BJBC) silicon solar cells with the size of 4.04 cm 2 by conventional industrial processes of co‐diffusion, P ion implantation and annealing oxidation, laser patterning as well as screen printing and co‐firing technologies. The manufacturing process flow further successfully yields the maximum efficiency of around 21% BJBC silicon solar cells with enlarged sizes of 6 × 6 cm 2 . This work has demonstrated the simplified processes for the low‐cost and high‐efficiency BJBC silicon solar cell industrialization.


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    Title :

    Development of back‐junction back‐contact silicon solar cells based on industrial processes



    Published in:

    Publication date :

    2017




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English



    Classification :

    BKL:    53.36 Energiedirektumwandler, elektrische Energiespeicher