Conformational disorder of organic cations tunes the charge carrier mobility in two-dimensional organic-inorganic perovskites

doi:10.1038/s41467-020-19330-7

	Conformational disorder of organic cations tunes the charge carrier mobility in two-dimensional organic-inorganic perovskites
	Li, Chuanzhao 3,4; Yang, Jin 1,2; Su, Fuhai 2; Tan, Junjun 3,4; Luo, Yi 3,4; Ye, Shuji 3,4
刊名	NATURE COMMUNICATIONS
	2020-10-30
卷号	11
ISSN号	2041-1723
DOI	10.1038/s41467-020-19330-7
通讯作者	Ye, Shuji(shujiye@ustc.edu.cn)
英文摘要	The chemical nature of the organic cations governs the optoelectronic properties of two-dimensional organic-inorganic perovskites. But its mechanism is not fully understood. Here, we apply femtosecond broadband sum frequency generation vibrational spectroscopy to investigate the molecular conformation of spacer organic cations in two-dimensional organic-inorganic perovskite films and establish a correlation among the conformation of the organic cations, the charge carrier mobility, and broadband emission. Our study indicates that both the mobility and broadband emission show strong dependence on the molecular conformational order of organic cations. The gauche defect and local chain distortion of organic cations are the structural origin of the in-plane mobility reduction and broad emission in two-dimensional organic-inorganic perovskites. Both of the interlayer distance and the conformational order of the organic cations affect the out-of-plane mobility. This work provides molecular-level understanding of the conformation of organic cations in optimizing the optoelectronic properties of two-dimensional organic-inorganic perovskites. Understanding the correlation between molecular structure and properties of 2D hybrid perovskites is crucial for material design and device performance. Here, the authors reveal that conformation of organic cations in the inorganic cages has strong effects on charge mobility and broadband emission behaviour.
资助项目	National Key Research and Development Program of China[2018YFA0208700] ; National Key Research and Development Program of China[2017YFA0303500] ; National Natural Science Foundation of China[21925302] ; National Natural Science Foundation of China[21633007] ; National Natural Science Foundation of China[11774354] ; National Natural Science Foundation of China[51727806] ; Anhui Initiative in Quantum Information Technologies[AHY090000]
WOS关键词	SUM-FREQUENCY GENERATION ; VIBRATIONAL SPECTROSCOPY ; HYBRIDS (CNH2N+1NH3)(2)PBI4 ; PHASE-TRANSITIONS ; MOLECULAR-ORIENTATION ; DIFFUSION ; ELECTRON ; RECOMBINATION ; TRANSISTORS ; EFFICIENCY
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	NATURE RESEARCH
WOS记录号	WOS:000588063600004
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China ; Anhui Initiative in Quantum Information Technologies
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/105442]
专题	中国科学院合肥物质科学研究院
通讯作者	Ye, Shuji
作者单位	1.Univ Sci & Technol China, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Hefei Inst Phys Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China 3.Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum P, Hefei 230026, Peoples R China 4.Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Dept Chem Phys, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Li, Chuanzhao,Yang, Jin,Su, Fuhai,et al. Conformational disorder of organic cations tunes the charge carrier mobility in two-dimensional organic-inorganic perovskites[J]. NATURE COMMUNICATIONS,2020,11.
APA	Li, Chuanzhao,Yang, Jin,Su, Fuhai,Tan, Junjun,Luo, Yi,&Ye, Shuji.(2020).Conformational disorder of organic cations tunes the charge carrier mobility in two-dimensional organic-inorganic perovskites.NATURE COMMUNICATIONS,11.
MLA	Li, Chuanzhao,et al."Conformational disorder of organic cations tunes the charge carrier mobility in two-dimensional organic-inorganic perovskites".NATURE COMMUNICATIONS 11(2020).