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Manipulate energy transport via fluorinated spacers towards record-efficiency 2D Dion-Jacobson CsPbI3 solar cells
文献摘要：
Two-dimensional(2D)Dion-Jacobson(D-J)-type cesium lead iodide CsPbI3 perform remarkably in terms of stability.However,the complex interactions between spacer and inorganic layers limit its excellent progress in perovskite solar cells(PSCs).Herein,starting from the considerable structural diversity of organic spacers,we engineer 2D CsPbI3 with fine-tuning functionalities.Specifically,for the first time we embedded fluorinated aromatic cations in 2D D-J CsPbI3,and successfully applied it into construction of high-performance PSCs.Compared with constitutive 1,4-diaminobenzene(PDA),the fluorinated 2-fluorobenzene-1,4-diamine(F-PDA)component greatly expands the dipole moment from 0.59D to 3.47D,which reduces the exciton binding energy of the system.A theoretical study shows that the spacer layer and inorganic plane are more enriched with charge accumulation in(F-PDA)Csn-1PbnI3n+1.The results show that(F-PDA)Csn-1PbnI3n+1 demonstrates more significant charge transfer between organic and inorganic layers than(PDA)Csn-1Pbnl3n+1,and it is confirmed in the femtosecond transient absorption experiment.Moreover,the interactions of the fluorinated spacer with the[PbI6]4-plane effectively manipulate the crystallization quality,and thus the ion migration and defect formation of target 2D CsPbI3 are inhibited.As a result,we obtained a record power conversion efficiency(PCE)beyond 15％for 2D D-J(F-PDA)Cs3Pb4I13(n=4)PSCs with significantly improved environmental stability compared with the three-dimensional(3D)counterparts.
文献关键词：
中图分类号：
[1] 数理科学和化学（O） / 力学（O3） / 振动理论（O32） / 非线性振动（O322）
[2] 经济（F） / 工业经济（F4） / 中国工业经济（F42）
[3] 自动化技术、计算机技术（TP） / 计算技术、计算机技术（TP3） / 计算机的应用（TP39） / 信息处理(信息加工)（TP391）
作者姓名：
Yutian Lei;Zhenhua Li;Haoxu Wang;Qian Wang;Guoqiang Peng;Youkui Xu;Haihua Zhang;Gang Wang;Liming Ding;Zhiwen Jin
作者机构：
School of Physical Science and Technology&Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education,Lanzhou University,Lanzhou 730000,China;School of Physical Science and Technology&Lanzhou Center for Theoretical Physics&Key Laboratory of Theoretical Physics of Gansu Province,Lanzhou University,Lanzhou 730000,China;Delft University of Technology,Photovoltaic Materials and Devices Group,Delft 2628CD,the Netherlands;Institute of Molecular Plus,Tianjin University,Tianjin 300072,China;Department of Microelectronic Science and Engineering,School of Physical Science and Technology,Ningbo University,Ningbo 315211,China;Key Laboratory of Nanosystem and Hierarchical Fabrication,National Center for Nanoscience and Technology,Beijing 100190,China
文献出处：
科学通报（英文版）
引用格式：
[1]Yutian Lei;Zhenhua Li;Haoxu Wang;Qian Wang;Guoqiang Peng;Youkui Xu;Haihua Zhang;Gang Wang;Liming Ding;Zhiwen Jin-.Manipulate energy transport via fluorinated spacers towards record-efficiency 2D Dion-Jacobson CsPbI3 solar cells)[J].科学通报（英文版）,2022(13):1352-1361
A类：
Manipulate,diaminobenzene,fluorobenzene,59D,1PbnI3n+1,1Pbnl3n+1,PbI6,Cs3Pb4I13
B类：
energy,transport,via,fluorinated,spacers,towards,record,efficiency,2D,Dion,Jacobson,CsPbI3,solar,cells,Two,dimensional,type,cesium,lead,iodide,remarkably,terms,stability,However,complex,interactions,between,inorganic,layers,limit,its,excellent,progress,perovskite,PSCs,Herein,starting,from,considerable,structural,diversity,engineer,fine,tuning,functionalities,Specifically,first,embedded,aromatic,cations,successfully,applied,into,construction,high,performance,Compared,constitutive,PDA,diamine,component,greatly,expands,dipole,moment,47D,which,reduces,exciton,binding,system,theoretical,study,shows,that,plane,more,enriched,charge,accumulation,Csn,results,demonstrates,transfer,than,is,confirmed,femtosecond,transient,absorption,experiment,Moreover,effectively,manipulate,crystallization,quality,thus,migration,defect,formation,target,inhibited,obtained,power,conversion,PCE,beyond,significantly,improved,environmental,compared,three,counterparts
AB值：
0.529009
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