中国物理B ›› 2018, Vol. 27 ›› Issue (6): 66108-066108.doi: 10.1088/1674-1056/27/6/066108

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Impressive self-healing phenomenon of Cu2ZnSn(S, Se)4 solar cells

Qing Yu(于晴), Jiangjian Shi(石将建), Pengpeng Zhang(张朋朋), Linbao Guo(郭林宝), Xue Min(闵雪), Yanhong Luo(罗艳红), Huijue Wu(吴会觉), Dongmei Li(李冬梅), Qingbo Meng(孟庆波)   

  1. 1 CAS Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences(CAS), Beijing 100190, China;
    2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2018-05-04 修回日期:2018-05-11 出版日期:2018-06-05 发布日期:2018-06-05
  • 通讯作者: Dongmei Li, Qingbo Meng E-mail:dmli@iphy.ac.cn;qbmeng@iphy.ac.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos.91733301,51761145042,91433205,11474333,51421002,51627803,and 51572288) and the International Partnership Program of the Chinese Academy of Sciences (Grant No.112111KYSB20170089).

Impressive self-healing phenomenon of Cu2ZnSn(S, Se)4 solar cells

Qing Yu(于晴)1,2, Jiangjian Shi(石将建)1, Pengpeng Zhang(张朋朋)1,2, Linbao Guo(郭林宝)1,2, Xue Min(闵雪)1,2, Yanhong Luo(罗艳红)1,2, Huijue Wu(吴会觉)1, Dongmei Li(李冬梅)1,2, Qingbo Meng(孟庆波)1,2   

  1. 1 CAS Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences(CAS), Beijing 100190, China;
    2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2018-05-04 Revised:2018-05-11 Online:2018-06-05 Published:2018-06-05
  • Contact: Dongmei Li, Qingbo Meng E-mail:dmli@iphy.ac.cn;qbmeng@iphy.ac.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos.91733301,51761145042,91433205,11474333,51421002,51627803,and 51572288) and the International Partnership Program of the Chinese Academy of Sciences (Grant No.112111KYSB20170089).

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摘要：

A study of the self-healing phenomenon of Cu2ZnSn(S, Se)4 (CZTSSe) solar cells has shown more than 10% enhancement in cell performance after storage at room temperature for a week, with a significant improvement in the open-circuit photovoltage (Voc) and fill factor (FF). In addition, up to 10.45% power conversion efficiency (PCE) has been achieved. No obvious change in crystallinity, crystal phase, optical absorption or elemental distribution in the CZTSSe films was detected on examining the x-ray diffraction (XRD) pattern, Raman spectrum, ultraviolet-visible (UV-Vis), and TOF-SIMS. Further investigations on the charge carrier concentration, charge radiative recombination, and band structure suggest that the enhancement in PCE stems mainly from a reduction in deep defects of the CZTSSe semiconductor film.

关键词: Cu2ZnSn(SSe)4, defects reduction, self-healing

Abstract:

A study of the self-healing phenomenon of Cu2ZnSn(S, Se)4 (CZTSSe) solar cells has shown more than 10% enhancement in cell performance after storage at room temperature for a week, with a significant improvement in the open-circuit photovoltage (Voc) and fill factor (FF). In addition, up to 10.45% power conversion efficiency (PCE) has been achieved. No obvious change in crystallinity, crystal phase, optical absorption or elemental distribution in the CZTSSe films was detected on examining the x-ray diffraction (XRD) pattern, Raman spectrum, ultraviolet-visible (UV-Vis), and TOF-SIMS. Further investigations on the charge carrier concentration, charge radiative recombination, and band structure suggest that the enhancement in PCE stems mainly from a reduction in deep defects of the CZTSSe semiconductor film.

Key words: Cu2ZnSn(SSe)4, defects reduction, self-healing

中图分类号:  (Defects and impurities in crystals; microstructure)

  • 61.72.-y
61.66.Fn (Inorganic compounds) 61.72.Bb (Theories and models of crystal defects)