Engineered Directional Charge Flow in Mixed Two-Dimensional Perovskites Enabled by Facile Cation-Exchange

	Engineered Directional Charge Flow in Mixed Two-Dimensional Perovskites Enabled by Facile Cation-Exchange
	Wu, Kaifeng 1; Wang, Junhui ; Leng, Jing ; Liu, Junxue ; He, Sheng ; Wang, Yu ; Jin, Shengye 1
刊名	JOURNAL OF PHYSICAL CHEMISTRY C
	2017-10-05
卷号	121 期号:39 页码:21281-21289
英文摘要	Two-dimensional (2D) organolead halide perovskites are promising candidates for many optoelectronic applications in view of their improved moisture-resistance and tunability in bandgap energy as compared to their 3D counterparts. Herein, we demonstrate the use of cation exchange between A and B in (A)(2)(B)(n-1)PbnI3n+1 (A = CH3(CH2)(3)NH3+, B = CH3NH3+) to fabricate mixed 2D perovskites with well-controlled n-values of perovskite constituentsas well as their relative amounts. We find that the perovskite components in thin films can be systematically tuned from pure 3D to 2D mixture (containing multiple 2D components), and to pure single-phase 2D (n = 1) by simply adjusting the cation-exchange time. Extensive static and transient spectroscopic measurements show the internal electron-hole separation in the mixed 2D perovskite film clue to the ordered band alignment between different perovskite components. This engineered directional charge flow can be particularly helpful for the photovoltaic application of 2D perovskites.
WOS标题词	Science & Technology ; Physical Sciences ; Technology
类目[WOS]	Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
研究领域[WOS]	Chemistry ; Science & Technology - Other Topics ; Materials Science
关键词[WOS]	LIGHT-EMITTING-DIODES ; ORGANOMETAL HALIDE PEROVSKITE ; SOLAR-CELLS ; CH3NH3PBI3 PEROVSKITE ; QUANTUM CONFINEMENT ; 2D PEROVSKITES ; IODIDE ; TRANSFORMATION ; EFFICIENCY ; ELECTRON
收录类别	SCI
语种	英语
WOS记录号	WOS:000412716300021
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/150130]
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
作者单位	1.Chinese Acad Sci, State Key Lab Mol React Dynam, Dalian Inst Chem Phys, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Collaborat Innovat Ctr Chem Energy Mat iChEM, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Wu, Kaifeng,Wang, Junhui,Leng, Jing,et al. Engineered Directional Charge Flow in Mixed Two-Dimensional Perovskites Enabled by Facile Cation-Exchange[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2017,121(39):21281-21289.
APA	Wu, Kaifeng.,Wang, Junhui.,Leng, Jing.,Liu, Junxue.,He, Sheng.,...&Jin, Shengye.(2017).Engineered Directional Charge Flow in Mixed Two-Dimensional Perovskites Enabled by Facile Cation-Exchange.JOURNAL OF PHYSICAL CHEMISTRY C,121(39),21281-21289.
MLA	Wu, Kaifeng,et al."Engineered Directional Charge Flow in Mixed Two-Dimensional Perovskites Enabled by Facile Cation-Exchange".JOURNAL OF PHYSICAL CHEMISTRY C 121.39(2017):21281-21289.