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Article: Four-Coordinate Boron Emitters with Tridentate Chelating Ligand for Efficient and Stable Thermally Activated Delayed Fluorescence Organic Light-Emitting Devices

TitleFour-Coordinate Boron Emitters with Tridentate Chelating Ligand for Efficient and Stable Thermally Activated Delayed Fluorescence Organic Light-Emitting Devices
Authors
Keywordsfour-coordinate boron
operational stability
organic light-emitting diodes
thermally activated delayed fluorescence
tridentate ligand
Issue Date2019
PublisherWiley - VCH Verlag GmbH & Co. KGaA. The Journal's web site is located at http://www3.interscience.wiley.com/journal/26737/home
Citation
Angewandte Chemie (International Edition), 2019, v. 58 n. 27, p. 9088-9094 How to Cite?
AbstractA new class of four‐coordinate donor‐acceptor fluoroboron‐containing thermally activated delayed fluorescence (TADF) compounds bearing a tridentate 2,2′‐(pyridine‐2,6‐diyl)diphenolate (dppy) ligand has been successfully designed and synthesized. Upon varying the donor moieties from carbazole to 10H‐spiro[acridine‐9,9′‐fluorene] to 9,9‐dimethyl‐9,10‐dihydroacridine, these boron derivatives exhibit a wide range of emission colors spanning from blue to yellow with a large spectral shift of 2746 cm−1, with high PLQYs of up to 96 % in the doped thin film. Notably, vacuum‐deposited organic light‐emitting devices (OLEDs) made with these boron compounds demonstrate high performances with the best current efficiencies of 55.7 cd A−1, power efficiencies of 58.4 lm W−1 and external quantum efficiencies of 18.0 %. More importantly, long operational stabilities of the green‐emitting OLEDs based on 2 with half‐lifetimes of up to 12 733 hours at an initial luminance of 100 cd m−2 have been realized. This work represents for the first time the design and synthesis of tridentate dppy‐chelating four‐coordinate boron TADF compounds for long operational stabilities, suggesting great promises for the development of stable boron‐containing TADF emitters.
Persistent Identifierhttp://hdl.handle.net/10722/274837
ISSN
2017 Impact Factor: 12.102
2015 SCImago Journal Rankings: 6.229

 

DC FieldValueLanguage
dc.contributor.authorLI, P-
dc.contributor.authorChan, H-
dc.contributor.authorLai, SL-
dc.contributor.authorNg, M-
dc.contributor.authorChan, MY-
dc.contributor.authorYam, VWW-
dc.date.accessioned2019-09-10T02:29:52Z-
dc.date.available2019-09-10T02:29:52Z-
dc.date.issued2019-
dc.identifier.citationAngewandte Chemie (International Edition), 2019, v. 58 n. 27, p. 9088-9094-
dc.identifier.issn1433-7851-
dc.identifier.urihttp://hdl.handle.net/10722/274837-
dc.description.abstractA new class of four‐coordinate donor‐acceptor fluoroboron‐containing thermally activated delayed fluorescence (TADF) compounds bearing a tridentate 2,2′‐(pyridine‐2,6‐diyl)diphenolate (dppy) ligand has been successfully designed and synthesized. Upon varying the donor moieties from carbazole to 10H‐spiro[acridine‐9,9′‐fluorene] to 9,9‐dimethyl‐9,10‐dihydroacridine, these boron derivatives exhibit a wide range of emission colors spanning from blue to yellow with a large spectral shift of 2746 cm−1, with high PLQYs of up to 96 % in the doped thin film. Notably, vacuum‐deposited organic light‐emitting devices (OLEDs) made with these boron compounds demonstrate high performances with the best current efficiencies of 55.7 cd A−1, power efficiencies of 58.4 lm W−1 and external quantum efficiencies of 18.0 %. More importantly, long operational stabilities of the green‐emitting OLEDs based on 2 with half‐lifetimes of up to 12 733 hours at an initial luminance of 100 cd m−2 have been realized. This work represents for the first time the design and synthesis of tridentate dppy‐chelating four‐coordinate boron TADF compounds for long operational stabilities, suggesting great promises for the development of stable boron‐containing TADF emitters.-
dc.languageeng-
dc.publisherWiley - VCH Verlag GmbH & Co. KGaA. The Journal's web site is located at http://www3.interscience.wiley.com/journal/26737/home-
dc.relation.ispartofAngewandte Chemie (International Edition)-
dc.rightsThis 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.subjectfour-coordinate boron-
dc.subjectoperational stability-
dc.subjectorganic light-emitting diodes-
dc.subjectthermally activated delayed fluorescence-
dc.subjecttridentate ligand-
dc.titleFour-Coordinate Boron Emitters with Tridentate Chelating Ligand for Efficient and Stable Thermally Activated Delayed Fluorescence Organic Light-Emitting Devices-
dc.typeArticle-
dc.identifier.emailLai, SL: slllai@hku.hk-
dc.identifier.emailNg, M: mkyng@HKUCC-COM.hku.hk-
dc.identifier.emailChan, MY: chanmym@hku.hk-
dc.identifier.emailYam, VWW: wwyam@hku.hk-
dc.identifier.authorityChan, MY=rp00666-
dc.identifier.authorityYam, VWW=rp00822-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/anie.201903332-
dc.identifier.pmid31050130-
dc.identifier.scopuseid_2-s2.0-85066823005-
dc.identifier.hkuros305121-
dc.identifier.volume58-
dc.identifier.issue27-
dc.identifier.spage9088-
dc.identifier.epage9094-
dc.publisher.placeGermany-

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