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（V（oc）） and fill factor（F F）. 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.
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（V（oc）） and fill factor（F F）. 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.
作者
于晴
石将建
张朋朋
郭林宝
闵雪
罗艳红
吴会觉
李冬梅
孟庆波
Qing Yu;Jiangjian Shi;Pengpeng Zhang;Linbao Guo;Xue Min;Yanhong Luo;Huijue Wu;Dongmei Li;Qingbo Meng(CAS Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics,Chinese Academy of Sciences（CAS）,School of Physical Sciences, University of Chinese Academy of Science)
基金
supported by the National Natural Science Foundation of China(Grant Nos.91733301,51761145042,91433205,11474333,51421002,51627803,and51572288)
the International Partnership Program of the Chinese Academy of Sciences(Grant No.112111KYSB20170089)
