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题名: Engineered Directional Charge Flow in Mixed Two-Dimensional Perovskites Enabled by Facile Cation-Exchange
作者: Wang, Junhui;  Leng, Jing;  Liu, Junxue;  He, Sheng;  Wang, Yu;  Wu, Kaifeng1;  Jin, Shengye1
刊名: JOURNAL OF PHYSICAL CHEMISTRY C
发表日期: 2017-10-05
DOI: 10.1021/acs.jpcc.7b08535
卷: 121, 期:39, 页:21281-21289
收录类别: SCI
文章类型: Article
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
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.
关键词[WOS]: LIGHT-EMITTING-DIODES ;  ORGANOMETAL HALIDE PEROVSKITE ;  SOLAR-CELLS ;  CH3NH3PBI3 PEROVSKITE ;  QUANTUM CONFINEMENT ;  2D PEROVSKITES ;  IODIDE ;  TRANSFORMATION ;  EFFICIENCY ;  ELECTRON
语种: 英语
WOS记录号: WOS:000412716300021
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/150230
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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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

Recommended Citation:
Wang, Junhui,Leng, Jing,Liu, Junxue,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.
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