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Article: Structure-Dependent Photoluminescence in Low-Dimensional Ethylammonium, Propylammonium, and Butylammonium Lead Iodide Perovskites

TitleStructure-Dependent Photoluminescence in Low-Dimensional Ethylammonium, Propylammonium, and Butylammonium Lead Iodide Perovskites
Authors
Keywordsalkylammonium
broadband emission
excitonic emission
hybrid lead halide perovskites
two-dimensional materials
Issue Date29-Jan-2020
PublisherAmerican Chemical Society
Citation
ACS Applied Materials and Interfaces, 2020, v. 12, n. 4, p. 5008-5016 How to Cite?
Abstract

Hybrid organic-inorganic perovskites have attracted great attention as the next generation materials for photovoltaic and light-emitting devices. However, their environment instability issue remains as the largest challenge for practical applications. Recently emerging two-dimensional (2D) perovskites with Ruddlesden-Popper structures are found to greatly improve the stability and aging problems. Furthermore, strong confinement of excitons in these natural quantum-well structures results in the distinct and narrow light emission in the visible spectral range, enabling the development of spectrally tunable light sources. Besides the strong quasi-monochromatic emission, some 2D perovskites composed of the specific organic cations and inorganic layer structures emit a pronounced broadband emission. Herein, we report the light-emitting properties and the degradation of low-dimensional perovskites consisting of the three shortest alkylammonium spacers, mono-ethylammonium (EA), n-propylammonium (PA), and n-butylammonium (BA). While (BA)(2)PbI4 is known to form well-oriented 2D thin films consisting of layers of corner-sharing PbI6 octahedra separated by a bilayer of BA cations, EA with shorter alkyl chains tends to form other types of lower-dimensional structures. Nevertheless, optical absorption edges of asprepared fresh EAPbI(3), (PA)(2)PbI4, and (BA)(2)PbI4 are obviously blue-shifted to 2.4-2.5 eV compared to their 3D counterpart, methylammonium lead iodide (MAPbI(3)) perovskite, and they all emit narrow excitonic photoluminescence. Furthermore, by carefully optimizing deposition conditions, we have achieved a predominantly 2D structure for (PA)(2)PbI4. However, unlike (BA)(2)PbI4, upon exposure to ambient environment, (PA)(2)PbI4 readily transforms to a different crystal structure, exhibiting a prominently broadband light from similar to 500 to 800 nm and a gradual increase in intensity as structural transformation proceeds.


Persistent Identifierhttp://hdl.handle.net/10722/335690
ISSN
2023 Impact Factor: 8.3
2023 SCImago Journal Rankings: 2.058
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLin, CW-
dc.contributor.authorLiu, FZ-
dc.contributor.authorChen, TY-
dc.contributor.authorLee, KH-
dc.contributor.authorChang, CK-
dc.contributor.authorHe, YL-
dc.contributor.authorLeung, TL-
dc.contributor.authorNg, AMC-
dc.contributor.authorHsu, CH-
dc.contributor.authorPopovic, J-
dc.contributor.authorDjurisic, A-
dc.contributor.authorAhn, H-
dc.date.accessioned2023-12-20T08:47:03Z-
dc.date.available2023-12-20T08:47:03Z-
dc.date.issued2020-01-29-
dc.identifier.citationACS Applied Materials and Interfaces, 2020, v. 12, n. 4, p. 5008-5016-
dc.identifier.issn1944-8244-
dc.identifier.urihttp://hdl.handle.net/10722/335690-
dc.description.abstract<p>Hybrid organic-inorganic perovskites have attracted great attention as the next generation materials for photovoltaic and light-emitting devices. However, their environment instability issue remains as the largest challenge for practical applications. Recently emerging two-dimensional (2D) perovskites with Ruddlesden-Popper structures are found to greatly improve the stability and aging problems. Furthermore, strong confinement of excitons in these natural quantum-well structures results in the distinct and narrow light emission in the visible spectral range, enabling the development of spectrally tunable light sources. Besides the strong quasi-monochromatic emission, some 2D perovskites composed of the specific organic cations and inorganic layer structures emit a pronounced broadband emission. Herein, we report the light-emitting properties and the degradation of low-dimensional perovskites consisting of the three shortest alkylammonium spacers, mono-ethylammonium (EA), n-propylammonium (PA), and n-butylammonium (BA). While (BA)(2)PbI4 is known to form well-oriented 2D thin films consisting of layers of corner-sharing PbI6 octahedra separated by a bilayer of BA cations, EA with shorter alkyl chains tends to form other types of lower-dimensional structures. Nevertheless, optical absorption edges of asprepared fresh EAPbI(3), (PA)(2)PbI4, and (BA)(2)PbI4 are obviously blue-shifted to 2.4-2.5 eV compared to their 3D counterpart, methylammonium lead iodide (MAPbI(3)) perovskite, and they all emit narrow excitonic photoluminescence. Furthermore, by carefully optimizing deposition conditions, we have achieved a predominantly 2D structure for (PA)(2)PbI4. However, unlike (BA)(2)PbI4, upon exposure to ambient environment, (PA)(2)PbI4 readily transforms to a different crystal structure, exhibiting a prominently broadband light from similar to 500 to 800 nm and a gradual increase in intensity as structural transformation proceeds.</p>-
dc.languageeng-
dc.publisherAmerican Chemical Society-
dc.relation.ispartofACS Applied Materials and Interfaces-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.subjectalkylammonium-
dc.subjectbroadband emission-
dc.subjectexcitonic emission-
dc.subjecthybrid lead halide perovskites-
dc.subjecttwo-dimensional materials-
dc.titleStructure-Dependent Photoluminescence in Low-Dimensional Ethylammonium, Propylammonium, and Butylammonium Lead Iodide Perovskites-
dc.typeArticle-
dc.identifier.doi10.1021/acsami.9b17881-
dc.identifier.pmid31888331-
dc.identifier.scopuseid_2-s2.0-85078158818-
dc.identifier.volume12-
dc.identifier.issue4-
dc.identifier.spage5008-
dc.identifier.epage5016-
dc.identifier.eissn1944-8252-
dc.identifier.isiWOS:000510532000088-
dc.publisher.placeWASHINGTON-
dc.identifier.issnl1944-8244-

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