科学通报(英文版)2024，Vol.69Issue(8) ：1050-1060.DOI:10.1016/j.scib.2024.01.038

Spatially selective defect management of CsPbI3 films for high-performance carbon-based inorganic perovskite solar cells

Hailiang Wang Qixian Zhang Zedong Lin Huicong Liu Xiaozhen Wei Yongfa Song Chunyu Lv Weiping Li Liqun Zhu Kexiang Wang Zhenhua Cui Lan Wang Changqing Lin Penggang Yin Tinglu Song Yang Bai Qi Chen Shihe Yang Haining Chen
科学通报(英文版)2024，Vol.69Issue(8) ：1050-1060.DOI:10.1016/j.scib.2024.01.038
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Spatially selective defect management of CsPbI3 films for high-performance carbon-based inorganic perovskite solar cells

Hailiang Wang 1Qixian Zhang 1Zedong Lin 2Huicong Liu 1Xiaozhen Wei 1Yongfa Song 1Chunyu Lv 1Weiping Li 1Liqun Zhu 1Kexiang Wang 3Zhenhua Cui 4Lan Wang 5Changqing Lin 6Penggang Yin 3Tinglu Song 7Yang Bai 4Qi Chen 4Shihe Yang 2Haining Chen1
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作者信息

  • 1. School of Materials Science and Engineering,Beihang University,Beijing 100191,China
  • 2. Guangdong Provincial Key Lab of Nano-Micro Materials Research,School of Advanced Materials,Shenzhen Graduate School,Peking University,Shenzhen 518055,China;Institute of Biomedical Engineering,Shenzhen Bay Laboratory,Shenzhen 518107,China
  • 3. School of Chemistry,Beihang University,Beijing 100191,China
  • 4. Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications,MIIT Key Laboratory for Low-Dimensional Quantum Structure and Devices,Experimental Center of Advanced Materials,School of Materials Science & Engineering,Beijing Institute of Technology,Beijing 100081,China
  • 5. School of Internet of Things Engineering,Jiangnan University,Wuxi 214122,China
  • 6. School of Physical Science and Technology,Guangxi University,Nanning 530004,China
  • 7. Experimental Center of Advanced Materials,School of Materials Science & Engineering,Beijing Institute of Technology,Beijing 100081,China
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Abstract

Defects formed at the surface,buried interface and grain boundaries(GB)of CsPbI3 perovskite films con-siderably limit photovoltaic performance.Such defects could be passivated effectively by the most preva-lent post modification strategy without compromising the photoelectric properties of perovskite films,but it is still a great challenge to make this strategy comprehensive to different defects spatially distributed throughout the films.Herein,a spatially selective defect management(SSDM)strategy is developed to roundly passivate various defects at different locations within the perovskite film by a facile one-step treatment procedure using a piperazine-1,4-diium tetrafluoroborate(PZD(BF4)2)solution.The small-size PZD2+cations could penetrate into the film interior and even make it all the way to the buried interface of CsPbI3 perovskite films,while the BF4-anions,with largely different properties from I-anions,mainly anchor on the film surface.Consequently,virtually all the defects at the surface,buried interface and grain boundaries of CsPbI3 perovskite films are effectively healed,leading to significantly improved film quality,enhanced phase stability,optimized energy level alignment and promoted carrier transport.With these films,the fabricated CsPbI3 PSCs based on carbon electrode(C-PSCs)achieve an efficiency of 18.27％,which is among the highest-reported values for inorganic C-PSCs,and stability of 500 h at 85 ℃ with 65％efficiency maintenance.

Key words

CsPbl3/Defects/Spatially selective defect management/Carbon electrode

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基金项目

National Natural Science Foundation of China(21875013)

National Natural Science Foundation of China(U2001217)

Beijing Natural Science Foundation(2182031)

Shenzhen Basic Research(JCYJ20220818101018038)

出版年

2024
科学通报(英文版)
中国科学院

科学通报(英文版)

CSTPCD
ISSN：1001-6538
参考文献量88
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