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DOI	10.1021/acsenergylett.0c01047
	Modulation of Broadband Emissions in Two-Dimensional â ¨100â ©-Oriented Ruddlesden-Popper Hybrid Perovskites
	Yin J.; Naphade R.; Gutiérrez Arzaluz L.; Brédas J.-L.; Bakr O.M.; Mohammed O.F.
发表日期	2020
ISSN	23808195
起始页码	2149
结束页码	2155
卷号	5 期号:7
英文摘要	Two-dimensional (2D) Ruddlesden-Popper (RP) perovskites are emerging materials for light-emitting applications. Unfortunately, their desirable narrowband emission coexists with broadband emissions, which limits the color quality and performance of the light source. However, the origin of such broadband emission in (100)-oriented perovskites is still under debate. Here, we experimentally and theoretically demonstrate that unlike (110)-oriented RP perovskites, the broadband emission of the 2D (100)-oriented RP (PEA)2PbI4 (PEA = C6H5C2H4NH3+) perovskites originates from defect-related luminescence centers. We find that the broadband emission of this prototype 2D structure can be largely suppressed by using excess PEAI treatment. Density functional theory (DFT) calculations indicate that iodine (I) vacancies both in the bulk and on the surface are responsible for the broadband emission. We attribute the decreased broadband emission after PEAI treatment to the passivation of both undercoordinated Pb2+ ions on the surface and I vacancies in the bulk through I- ion migration. Copyright © 2020 American Chemical Society.
scopus关键词	Light; Light emission; Light sources; Perovskite; 2D structures; Broadband emission; Emerging materials; Ion migration; Luminescence centers; Narrow-band emission; Ruddlesden-Popper; Two Dimensional (2 D); Density functional theory
来源期刊	ACS Energy Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/176864
作者单位	Division of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia; Department of Chemistry and Biochemistry, University of Arizona, Tucson, AZ 85721-0088, United States
推荐引用方式 GB/T 7714	Yin J.,Naphade R.,Gutiérrez Arzaluz L.,et al. Modulation of Broadband Emissions in Two-Dimensional â ¨100â ©-Oriented Ruddlesden-Popper Hybrid Perovskites[J],2020,5(7).
APA	Yin J.,Naphade R.,Gutiérrez Arzaluz L.,Brédas J.-L.,Bakr O.M.,&Mohammed O.F..(2020).Modulation of Broadband Emissions in Two-Dimensional â ¨100â ©-Oriented Ruddlesden-Popper Hybrid Perovskites.ACS Energy Letters,5(7).
MLA	Yin J.,et al."Modulation of Broadband Emissions in Two-Dimensional â ¨100â ©-Oriented Ruddlesden-Popper Hybrid Perovskites".ACS Energy Letters 5.7(2020).