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DOI | 10.1126/science.aal4211 |
PEROVSKITE PHYSICS Extremely efficient internal exciton dissociation through edge states in layered 2D perovskites | |
Blancon, J. -C.1; Tsai, H.1,2; Nie, W.1; Stoumpos, C. C.3; Pedesseau, L.4; Katan, C.5; Kepenekian, M.5; Soe, C. M. M.3; Appavoo, K.6; Sfeir, M. Y.6; Tretiak, S.1; Ajayan, P. M.2; Kanatzidis, M. G.3,7; Even, J.4; Crochet, J. J.1; Mohite, A. D.1 | |
2017-03-24 | |
发表期刊 | SCIENCE
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ISSN | 0036-8075 |
EISSN | 1095-9203 |
出版年 | 2017 |
卷号 | 355期号:6331页码:1288-1291 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; France |
英文摘要 | Understanding and controlling charge and energy flow in state-of-the-art semiconductor quantum wells has enabled high-efficiency optoelectronic devices. Two-dimensional (2D) Ruddlesden-Popper perovskites are solution-processed quantum wells wherein the band gap can be tuned by varying the perovskite-layer thickness, which modulates the effective electron-hole confinement. We report that, counterintuitive to classical quantum-confined systems where photogenerated electrons and holes are strongly bound by Coulomb interactions or excitons, the photophysics of thin films made of Ruddlesden-Popper perovskites with a thickness exceeding two perovskite-crystal units (>1.3 nanometers) is dominated by lower-energy states associated with the local intrinsic electronic structure of the edges of the perovskite layers. These states provide a direct pathway for dissociating excitons into longer-lived free carriers that substantially improve the performance of optoelectronic devices. |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000397082900033 |
WOS关键词 | QUANTUM CONFINEMENT ; ENERGIES ; DYNAMICS |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/195678 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Los Alamos Natl Lab, Los Alamos, NM 87545 USA; 2.Rice Univ, Dept Mat Sci & Nanoengn, Houston, TX 77005 USA; 3.Northwestern Univ, Dept Chem, Evanston, IL 60208 USA; 4.CNRS, INSA, FOTON, UMR 6082, F-35708 Rennes, France; 5.Univ Rennes 1, CNRS, ISCR, UMR 6226, F-35042 Rennes, France; 6.Ctr Funct Nanomat, Brookhaven Natl Lab, Upton, NY 11973 USA; 7.Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA |
推荐引用方式 GB/T 7714 | Blancon, J. -C.,Tsai, H.,Nie, W.,et al. PEROVSKITE PHYSICS Extremely efficient internal exciton dissociation through edge states in layered 2D perovskites[J]. SCIENCE,2017,355(6331):1288-1291. |
APA | Blancon, J. -C..,Tsai, H..,Nie, W..,Stoumpos, C. C..,Pedesseau, L..,...&Mohite, A. D..(2017).PEROVSKITE PHYSICS Extremely efficient internal exciton dissociation through edge states in layered 2D perovskites.SCIENCE,355(6331),1288-1291. |
MLA | Blancon, J. -C.,et al."PEROVSKITE PHYSICS Extremely efficient internal exciton dissociation through edge states in layered 2D perovskites".SCIENCE 355.6331(2017):1288-1291. |
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