Observation of Internal Photoinduced Electron and Hole Separation in Hybrid Two-Dimentional Perovskite Films

doi:10.1021/jacs.6b12581

	Observation of Internal Photoinduced Electron and Hole Separation in Hybrid Two-Dimentional Perovskite Films
	Zhang, Jun 2; Liu, Junxue 1,2,3; Leng, Jing 1,3; Wu, Kaifeng 1,3; Jin, Shengye 1,3
刊名	JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
	2017-02-01
卷号	139 期号:4 页码:1432-1435
ISSN号	0002-7863
DOI	10.1021/jacs.6b12581
文献子类	Article
英文摘要	Two-dimensional (2D) organolead halide perovskites are promising for various optoelectronic applications. Here we report a unique spontaneous charge (electron/hole) separation property in multilayered (BA)(2)(MA)(n-1)PbnI3n+1 (BA = CH3(CH2)(3)NH3+, MA = CH3NH3+) 2D perovskite films by studying the charge carrier dynamics using ultrafast transient absorption and photoluminescence spectroscopy. Surprisingly, the 2D perovskite films, although nominally prepared as "n = 4", are found to be mixture of multiple perovskite phases, with n = 2, 3, 4 and approximate to infinity, that naturally align in the order of n along the direction perpendicular to the substrate. Driven by the band alignment between 2D perovskites phases, we observe consecutive photoinduced electron transfer from small-n to large-n phases and hole transfer in the opposite direction on hundreds of picoseconds inside the 2D film of similar to 358 nm thickness. This internal charge transfer efficiently separates electrons and holes to the upper and bottom surfaces of the films, which is a unique property beneficial for applications in photovoltaics and other optoelectronics devices.
WOS关键词	LIGHT-EMITTING-DIODES ; QUANTUM CONFINEMENT ; HALIDE PEROVSKITES ; SEMICONDUCTORS ; NANOPLATELETS ; WELLS
WOS研究方向	Chemistry
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000393355600021
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/169694]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Zhang, Jun; Jin, Shengye
作者单位	1.Chinese Acad Sci, Collaborat Innovat Ctr Chem Energy Mat iChEM, Dalian Inst Chem Phys, 457 Zhongshan Rd, Dalian 116023, Peoples R China 2.China Univ Petr, Coll Chem Engn, State Key Lab Heavy Oil Proc, 66 Changjiang West Rd, Qingdao 266580, Peoples R China 3.Chinese Acad Sci, State Key Lab Mol React Dynam, Dalian Inst Chem Phys, 457 Zhongshan Rd, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Jun,Liu, Junxue,Leng, Jing,et al. Observation of Internal Photoinduced Electron and Hole Separation in Hybrid Two-Dimentional Perovskite Films[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2017,139(4):1432-1435.
APA	Zhang, Jun,Liu, Junxue,Leng, Jing,Wu, Kaifeng,&Jin, Shengye.(2017).Observation of Internal Photoinduced Electron and Hole Separation in Hybrid Two-Dimentional Perovskite Films.JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,139(4),1432-1435.
MLA	Zhang, Jun,et al."Observation of Internal Photoinduced Electron and Hole Separation in Hybrid Two-Dimentional Perovskite Films".JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 139.4(2017):1432-1435.