| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Enhanced stability of FA-based perovskite: Rare-earth metal compound EuBr2 doping |
| Minna Hou(候敏娜)1, Xu Guo(郭旭)1, Meidouxue Han(韩梅斗雪)2, Juntao Zhao(赵均陶)2, Zhiyuan Wang(王志元)1, Yi Ding(丁毅)2,†, Guofu Hou(侯国付)2, Zongsheng Zhang(张宗胜)1, and Xiaoping Han(韩小平)1,‡ |
1 School of Energy and Power Engineering, North University of China, Taiyuan 030051, China;
2 Institute of Photoelectronic Thin Film Devices and Technology, Nankai University, Tianjin 300072, China |
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Abstract It is highly desirable to enhance the long-term stability of perovskite solar cells (PSCs) so that this class of photovoltaic cells can be effectively used for the commercialization purposes. In this contribution, attempts have been made to use the two-step sequential method to dope EuBr2 into FAMAPbI3 perovskite to promote the stability. It is shown that the device durability at 85 ℃ in air with RH of 20%—40% is improved substantially, and simultaneously the champion device efficiency of 23.04% is achieved. The enhancement in stability is attributed to two points: (i) EuBr2 doping effectively inhibits the decomposition and α—δ phase transition of perovskite under ambient environment, and (ii) EuBr2 aggregates in the oxidized format of Eu(BrO3)3 at perovskite grain boundaries and surface, hampering humidity erosion and mitigates degradation through coordination with H2O.
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Received: 15 November 2023
Revised: 16 January 2024
Accepted manuscript online: 30 January 2024
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PACS:
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88.40.H-
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(Solar cells (photovoltaics))
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88.40.hj
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(Efficiency and performance of solar cells)
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| Fund: Project supported by the Fundamental Research Program of Shanxi Province, China (Grant No. 20210302124228), the National Key Research and Development Program of China (Grant No. 2022YFB4200203), the Key Project of Natural Science Foundation of Tianjin (Grant No. 22JCZDJC00120), and the 111 Project (Grant No. B16027). |
Corresponding Authors:
Yi Ding, Xiaoping Han
E-mail: yiding@nankai.edu.cn;xiaopinghan@nuc.edu.cn
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Cite this article:
Minna Hou(候敏娜), Xu Guo(郭旭), Meidouxue Han(韩梅斗雪), Juntao Zhao(赵均陶), Zhiyuan Wang(王志元), Yi Ding(丁毅), Guofu Hou(侯国付), Zongsheng Zhang(张宗胜), and Xiaoping Han(韩小平) Enhanced stability of FA-based perovskite: Rare-earth metal compound EuBr2 doping 2024 Chin. Phys. B 33 047802
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