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Article: High‐Performance Blue Perovskite Light‐Emitting Diodes Enabled by Efficient Energy Transfer between Coupled Quasi‐2D Perovskite Layers

TitleHigh‐Performance Blue Perovskite Light‐Emitting Diodes Enabled by Efficient Energy Transfer between Coupled Quasi‐2D Perovskite Layers
Authors
Keywordsblue perovskite LEDs
defect passivation
energy transfer
Issue Date2021
PublisherWiley-VCH Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.wiley-vch.de/publish/en/journals/alphabeticIndex/2089
Citation
Advanced Materials, 2021, v. 33 n. 1, p. article no. 2005570 How to Cite?
AbstractWhile there has been extensive investigation into modulating quasi-2D perovskite compositions in light-emitting diodes (LEDs) for promoting their electroluminescence, very few reports have studied approaches involving enhancement of the energy transfer between quasi-2D perovskite layers of the film, which plays very important role for achieving high-performance perovskite LEDs (PeLEDs). In this work, a bifunctional ligand of 4-(2-aminoethyl)benzoic acid (ABA) cation is strategically introduced into the perovskite to diminish the weak van der Waals gap between individual perovskite layers for promoting coupled quasi-2D perovskite layers. In particular, the strengthened interaction between coupled quasi-2D perovskite layers favors an efficient energy transfer in the perovskite films. The introduced ABA can also simultaneously passivate the perovskite defects by reducing metallic Pb for less nonradiative recombination loss. Benefiting from the advanced properties of ABA incorporated perovskites, highly efficient blue PeLEDs with external quantum efficiency of 10.11% and a very long operational stability of 81.3 min, among the best performing blue quasi-2D PeLEDs, are achieved. Consequently, this work contributes an effective approach for high-performance and stable blue PeLEDs toward practical applications.
Persistent Identifierhttp://hdl.handle.net/10722/305808
ISSN
2020 Impact Factor: 30.849
2020 SCImago Journal Rankings: 10.707

 

DC FieldValueLanguage
dc.contributor.authorRen, Z-
dc.contributor.authorYu, J-
dc.contributor.authorQin, Z-
dc.contributor.authorWang, J-
dc.contributor.authorSUN, J-
dc.contributor.authorChan, CCS-
dc.contributor.authorDing, S-
dc.contributor.authorWang, K-
dc.contributor.authorChen, R-
dc.contributor.authorWong, KS-
dc.contributor.authorLu, X-
dc.contributor.authorYin, WJ-
dc.contributor.authorChoy, WCH-
dc.date.accessioned2021-10-20T10:14:37Z-
dc.date.available2021-10-20T10:14:37Z-
dc.date.issued2021-
dc.identifier.citationAdvanced Materials, 2021, v. 33 n. 1, p. article no. 2005570-
dc.identifier.issn0935-9648-
dc.identifier.urihttp://hdl.handle.net/10722/305808-
dc.description.abstractWhile there has been extensive investigation into modulating quasi-2D perovskite compositions in light-emitting diodes (LEDs) for promoting their electroluminescence, very few reports have studied approaches involving enhancement of the energy transfer between quasi-2D perovskite layers of the film, which plays very important role for achieving high-performance perovskite LEDs (PeLEDs). In this work, a bifunctional ligand of 4-(2-aminoethyl)benzoic acid (ABA) cation is strategically introduced into the perovskite to diminish the weak van der Waals gap between individual perovskite layers for promoting coupled quasi-2D perovskite layers. In particular, the strengthened interaction between coupled quasi-2D perovskite layers favors an efficient energy transfer in the perovskite films. The introduced ABA can also simultaneously passivate the perovskite defects by reducing metallic Pb for less nonradiative recombination loss. Benefiting from the advanced properties of ABA incorporated perovskites, highly efficient blue PeLEDs with external quantum efficiency of 10.11% and a very long operational stability of 81.3 min, among the best performing blue quasi-2D PeLEDs, are achieved. Consequently, this work contributes an effective approach for high-performance and stable blue PeLEDs toward practical applications.-
dc.languageeng-
dc.publisherWiley-VCH Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.wiley-vch.de/publish/en/journals/alphabeticIndex/2089-
dc.relation.ispartofAdvanced Materials-
dc.rightsSubmitted (preprint) Version This is the pre-peer reviewed version of the following article: [FULL CITE], which has been published in final form at [Link to final article using the DOI]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. Accepted (peer-reviewed) Version This is the peer reviewed version of the following article: [FULL CITE], which has been published in final form at [Link to final article using the DOI]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.-
dc.subjectblue perovskite LEDs-
dc.subjectdefect passivation-
dc.subjectenergy transfer-
dc.titleHigh‐Performance Blue Perovskite Light‐Emitting Diodes Enabled by Efficient Energy Transfer between Coupled Quasi‐2D Perovskite Layers-
dc.typeArticle-
dc.identifier.emailRen, Z: zhwren@hku.hk-
dc.identifier.emailChoy, WCH: chchoy@eee.hku.hk-
dc.identifier.authorityChoy, WCH=rp00218-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/adma.202005570-
dc.identifier.pmid33215773-
dc.identifier.scopuseid_2-s2.0-85096653472-
dc.identifier.hkuros327827-
dc.identifier.volume33-
dc.identifier.issue1-
dc.identifier.spagearticle no. 2005570-
dc.identifier.epagearticle no. 2005570-
dc.publisher.placeGermany-

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