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    Abnormal Staebler-Wronski effect of amorphous silicon

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    Type
    Preprint
    Authors
    Liu, Wenzhu
    Shi, Jianhua
    Zhang, Liping
    Han, Anjun
    Huang, Shenglei
    Li, Xiaodong
    Peng, Jun
    Yang, Yuhao
    Gao, Yajun
    Yu, Jian
    Jiang, Kai
    Yang, Xinbo
    Li, Zhenfei
    Du, Junlin
    Song, Xin
    Yu, Youlin
    Ma, Zhixin
    Yao, Yubo
    Zhang, Haichuan
    Xu, Lujia cc
    Kang, Jingxuan
    Xie, Yi
    Liu, Hanyuan
    Meng, Fanying
    Laquai, Frédéric cc
    Di, Zengfeng
    Liu, Zhengxin
    KAUST Department
    KAUST Solar Center (KSC)
    Material Science and Engineering
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2021-06-03
    Permanent link to this record
    http://hdl.handle.net/10754/669424
    
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    Abstract
    Great achievements in last five years, such as record-efficient amorphous/crystalline silicon heterojunction (SHJ) solar cells and cutting-edge perovskite/SHJ tandem solar cells, place hydrogenated amorphous silicon (a-Si:H) at the forefront of emerging photovoltaics. Due to the extremely low doping efficiency of trivalent boron (B) in amorphous tetravalent silicon, light harvesting of aforementioned devices are limited by their fill factors (FF), which is a direct metric of the charge carrier transport. It is challenging but crucial to develop highly conductive doped a-Si:H for minimizing the FF losses. Here we report intensive light soaking can efficiently boost the dark conductance of B-doped a-Si:H "thin" films, which is an abnormal Staebler-Wronski effect. By implementing this abnormal effect to SHJ solar cells, we achieve a certificated power conversion efficiency (PCE) of 25.18% (26.05% on designated area) with FF of 85.42% on a 244.63-cm2 wafer. This PCE is one of the highest reported values for total-area "top/rear" contact silicon solar cells. The FF reaches 98.30 per cent of its Shockley-Queisser limit.
    Publisher
    arXiv
    arXiv
    2106.01657
    Additional Links
    https://arxiv.org/pdf/2106.01657.pdf
    Collections
    Preprints; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program; KAUST Solar Center (KSC)

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