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

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外文摘要：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.

外文关键词：

CsPbl3DefectsSpatially selective defect managementCarbon electrode

作者：

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

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作者单位：

School of Materials Science and Engineering,Beihang University,Beijing 100191,China

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

School of Chemistry,Beihang University,Beijing 100191,China

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

School of Internet of Things Engineering,Jiangnan University,Wuxi 214122,China

School of Physical Science and Technology,Guangxi University,Nanning 530004,China

Experimental Center of Advanced Materials,School of Materials Science & Engineering,Beijing Institute of Technology,Beijing 100081,China

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基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaBeijing Natural Science FoundationShenzhen Basic Research

项目编号：

21875013U20012172182031JCYJ20220818101018038

出版年：

2024

DOI：

10.1016/j.scib.2024.01.038