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Efficient and stable perovskite solar cells by build-inπ-columns and ionic interfaces in covalent organic frameworks

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Nano Research 2023年第7期16卷 9387-9397页

作者： Riming Nie Xiaokai Chen Zhongping Li Weicun Chu Si Ma Changqing Li Xiaoming Liu Yonghua Chen Zhuhua Zhang Wanlin Guo State Key Laboratory of Mechanics and Control of Mechanical Structures Key Laboratory for Intelligent Nano Materials and Devices of the Ministry of EducationInstitute for Frontier ScienceNanjing University of Aeronautics and AstronauticsNanjing 210016China Department of Chemical and Biomolecular Engineering Yonsei University50 Yonsei-roSeodaemun-guSeoul 120-749Republic of Korea College of Chemistry Jilin UniversityChangchun 130012China Department of Energy and Chemical Engineering Ulsan National Institute of Science and Technology(UNIST)50 UNIST-gilEonyang-eupUljugunUlsan 44919Republic of Korea Key Laboratory of Flexible Electronics(KLoFE) School of Flexible Electronics(Future Technologies)&Institute of Advanced Materials(IAM)Nanjing Tech University(Nanjing Tech)Nanjing 211816China

Perovskite solar cells(PSCs)have attracted much attention due to their rapidly increased power conversion efficiencies,however,their inherent poor long-term stability hinders their *** degradation of PSCs first comes from the degradation of hole transport materials(HTMs).Here,we report the construction of periodicπ-columnar arrays and ionic interfaces over the skeletons by introducing cationic covalent organic frameworks(C-COFs)to the ***π-columnar arrays can optimize the charge transport ability and energy levels of the hole transport layer and suppress the degradation of HTM,and ionic interfaces over the skeletons can produce stronger electric dipole and electrostatic interactions,as well as higher charge *** C-COFs were designed and synthesized via Schiff base reaction by using 1,3,5-triformylphloroglucinol as a neutral knot and dimidium bromide as cationic *** neutral COFs(N-COFs)were also synthesized as a reference by using 3,8-diamino-6-phenylphenanthridine as neutral *** with cationic COF exhibit the highest efficiency of 23.4%with excellent humidity and thermal *** the best of our knowledge,this is the highest efficiency among the meso-structured PSCs fabricated by a sequential process.

关键词： cationic covalent organic framework(C-COF) π-columnar arrays ionic interfaces charge density perovskite solar cells

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