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DOI	10.1002/adfm.201907979
	Band-Edge Exciton Fine Structure and Exciton Recombination Dynamics in Single Crystals of Layered Hybrid Perovskites
	Fang H.-H.; Yang J.; Adjokatse S.; Tekelenburg E.; Kamminga M.E.; Duim H.; Ye J.; Blake G.R.; Even J.; Loi M.A.
发表日期	2020
ISSN	1616301X
卷号	30 期号:6
英文摘要	2D perovskite materials have recently reattracted intense research interest for applications in photovoltaics and optoelectronics. As a consequence of the dielectric and quantum confinement effect, they show strongly bound and stable excitons at room temperature. Here, the band-edge exciton fine structure and in particular its exciton and biexciton dynamics in high quality crystals of (PEA)2PbI4 are investigated. A comparison of bulk and surface exciton lifetimes yields a room temperature surface recombination velocity of 2 × 103 cm s−1 and an intrinsic lifetime of 185 ns. Biexciton emission is evidenced at room temperature, with a binding energy of ≈45 meV and a lifetime of 80 ps. At low temperature, exciton state splitting is observed, which is caused by the electron–hole exchange interaction. Transient photoluminescence resolves the low-lying dark exciton state, with a bright/dark splitting energy estimated to be 10 meV. This work contributes to the understanding of the complex scenario of the elementary photoexcitations in 2D perovskites. The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
英文关键词	biexciton; dark exciton; exciton state splitting; layered perovskite; ultrafast dynamics
scopus关键词	Atomic physics; Binding energy; Crystal structure; Dynamics; Perovskite; Semiconductor quantum wells; Single crystals; Temperature; Biexcitons; Dark excitons; Exciton state; Layered perovskite; Ultra-fast dynamics; Excitons
来源期刊	Advanced Functional Materials
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/176988
作者单位	Department of Precision Instrument, Tsinghua University, Beijing, 100084, China; Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, Groningen, AG 9747, Netherlands; Univ Rennes, INSA Rennes, CNRS, Institut FOTON – UMR 6082, Rennes, F-35000, France
推荐引用方式 GB/T 7714	Fang H.-H.,Yang J.,Adjokatse S.,et al. Band-Edge Exciton Fine Structure and Exciton Recombination Dynamics in Single Crystals of Layered Hybrid Perovskites[J],2020,30(6).
APA	Fang H.-H..,Yang J..,Adjokatse S..,Tekelenburg E..,Kamminga M.E..,...&Loi M.A..(2020).Band-Edge Exciton Fine Structure and Exciton Recombination Dynamics in Single Crystals of Layered Hybrid Perovskites.Advanced Functional Materials,30(6).
MLA	Fang H.-H.,et al."Band-Edge Exciton Fine Structure and Exciton Recombination Dynamics in Single Crystals of Layered Hybrid Perovskites".Advanced Functional Materials 30.6(2020).