کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6534197 | 1420643 | 2018 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The suppression of Cu-related charge localized defects in Cu2ZnSnS4 thin film solar cells
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: The suppression of Cu-related charge localized defects in Cu2ZnSnS4 thin film solar cells The suppression of Cu-related charge localized defects in Cu2ZnSnS4 thin film solar cells](/preview/png/6534197.png)
چکیده انگلیسی
Cu2ZnSnS4 (CZTS) is a promising low cost thin-film solar cell material. However, the charge localized defects greatly hinder the improvement of the solar cell efficiency, thus the identification and knowledge of the possible charge localized defects in it are extremely important. Using hybrid functional calculation, we find that CuSn and CuZn are the main charge localized defects in CZTS. In detail, our results show that CuSn is a deep level recombination center. Moreover, the growth condition of Sn determines the population of CuSn because the stable chemical potential region of ÎμSn ([ââ¯1.74, 0] eV) is larger than that of ÎμCu ([ââ¯0.77, 0] eV). Thus Sn-rich growth condition is proposed to suppress the CuSn. As for CuZn antisites, part is deep acceptors which will be beneficial for the efficiency of solar cell, while part forms donor-acceptor pairs with ZnCu. The CuZn+ZnCu donor-acceptor pairs will lead to large potential fluctuation in CZTS, which is a disadvantageous factor. Fortunately, such pairs can be greatly suppressed by Cd doping due to two reasons: one is that the Cd atoms prefer to substitute the Zn atomic sites leading to the reduction of the CuZn concentration, and the other is that the Cd dopant in the CZTS makes it difficult for its neighboring Zn atom be substituted by Cu atom.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solar Energy Materials and Solar Cells - Volume 180, 15 June 2018, Pages 118-122
Journal: Solar Energy Materials and Solar Cells - Volume 180, 15 June 2018, Pages 118-122
نویسندگان
Xiaoli Zhang, Miaomiao Han, Xiaohong Zheng, Zhi Zeng,