气候变化领域集成服务门户(CCPortal): Revealing Excitonic Phonon Coupling in (PEA)2(MA)n-1PbnI3 n+12D Layered Perovskites

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DOI	10.1021/acs.jpclett.0c01714
	Revealing Excitonic Phonon Coupling in (PEA)2(MA)n-1PbnI3 n+12D Layered Perovskites
	Urban J.M.; Chehade G.; Dyksik M.; Menahem M.; Surrente A.; Trippé-Allard G.; Maude D.K.; Garrot D.; Yaffe O.; Deleporte E.; Plochocka P.; Baranowski M.
发表日期	2020
ISSN	19487185
起始页码	5830
结束页码	5835
卷号	11 期号:15
英文摘要	The family of 2D Ruddlesden-Popper perovskites is currently attracting great interest of the scientific community as highly promising materials for energy harvesting and light emission applications. Despite the fact that these materials are known for decades, only recently has it become apparent that their optical properties are driven by the exciton-phonon coupling, which is controlled by the organic spacers. However, the detailed mechanism of this coupling, which gives rise to complex absorption and emission spectra, is the subject of ongoing controversy. In this work we show that the particularly rich, absorption spectra of (PEA)2(CH3NH3)n-1PbnI3n+1 (where PEA stands for phenylethylammonium and n = 1, 2, 3), are related to a vibronic progression of excitonic transition. In contrast to other two-dimensional perovskites, we observe a coupling to a high-energy (40 meV) phonon mode probably related to the torsional motion of the NH3+ head of the organic spacer. Copyright © 2020 American Chemical Society.
scopus关键词	Ammonia; Emission spectroscopy; Energy harvesting; Optical properties; Phonons; Shims; Absorption and emission spectra; Exciton-phonon couplings; Excitonic transition; Layered perovskite; Ruddlesden-Popper; Scientific community; Torsional motion; Vibronic progressions; Perovskite
来源期刊	Journal of Physical Chemistry Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/176845
作者单位	Upr 3228, CNRS-UGA-UPS-INSA, Laboratoire National des Champs Magnétiques Intenses, Toulouse, 31400, France; Ens Paris-Saclay, Cnrs, CentraleSupelec, LuMIn, Université Paris-Saclay, Orsay, 91405, France; Department of Experimental Physics, Faculty of Fundamental Problems of Technology, Wroclaw University of Science and Technology, Wroclaw, 50-370, Poland; Department of Materials and Interfaces, Weizmann Institute of Science, Rehovoth, 76100, Israel; Groupe d'Etude de la Matière Condenseé, Université de Versailles Saint-Quentin-en-Yvelines, Université Paris-Saclay, 45 Avenue des Etats-Unis, Versailles, 78035, France
推荐引用方式 GB/T 7714	Urban J.M.,Chehade G.,Dyksik M.,et al. Revealing Excitonic Phonon Coupling in (PEA)2(MA)n-1PbnI3 n+12D Layered Perovskites[J],2020,11(15).
APA	Urban J.M..,Chehade G..,Dyksik M..,Menahem M..,Surrente A..,...&Baranowski M..(2020).Revealing Excitonic Phonon Coupling in (PEA)2(MA)n-1PbnI3 n+12D Layered Perovskites.Journal of Physical Chemistry Letters,11(15).
MLA	Urban J.M.,et al."Revealing Excitonic Phonon Coupling in (PEA)2(MA)n-1PbnI3 n+12D Layered Perovskites".Journal of Physical Chemistry Letters 11.15(2020).