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Article: Iridium(III) bis[2-(2-naphthyl)pyridine] (acetylacetonate)-based yellow and white phosphorescent organic light-emitting devices

TitleIridium(III) bis[2-(2-naphthyl)pyridine] (acetylacetonate)-based yellow and white phosphorescent organic light-emitting devices
Authors
KeywordsAcetylacetonates
Blue-emitting
Chromaticity coordinates
Excimer emissions
Maximum efficiency
Issue Date2011
PublisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/Publishing/Journals/jm/index.asp
Citation
Journal Of Materials Chemistry, 2011, v. 21 n. 13, p. 4983-4988 How to Cite?
AbstractWe report the synthesis of a new biscyclometalated yellow phosphorescent dopant iridium(iii) bis[2-(2-naphthyl)pyridine](acetylacetonate) (Ir(npy) 2acac) and studies of its application in organic light-emitting devices (OLEDs), in which highly efficient yellow-emitting OLEDs with high peak forward viewing efficiencies of 34 cd A -1, 22 lm W -1, and 11% can be obtained, along with the Commission de L'Eclairage 1931 chromaticity coordinates of (0.45, 0.54). More importantly, yellow phosphorescence can be achieved without the formation of excimer emission. Particularly, such devices exhibit a very broad and featureless peak at ca. 550 nm with a wide full spectral width at half maximum (FWHM) of 87 nm. Furthermore, combination with iridium(iii) bis[(3,4,5,-trifluorophenyl)-pyridinato-N,C 2′] picolinate doped p-bis-(triphenylsilyly)benzene as the blue-emitting layer yields highly efficient white OLEDs with maximum efficiencies as high as 46 cd A -1 and 41 lm W -1 in the forward direction, making Ir(npy) 2acac a promising organic phosphor for applications in yellow and white OLEDs. © The Royal Society of Chemistry 2011.
Persistent Identifierhttp://hdl.handle.net/10722/139026
ISSN
2013 Impact Factor: 6.626
2015 SCImago Journal Rankings: 2.540
ISI Accession Number ID
Funding AgencyGrant Number
Research Grants Council of the Hong Kong Special Administrative Region, ChinaCityU 101508
National Natural Science Foundation of China (NSFC)21002011
Fundamental Research Funds for the Central Universities
Research Fund for the Doctoral Program of Higher Education of China20100185120015
Funding Information:

This work was supported by the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. CityU 101508). S. Tao would like to thank financial supports from the National Natural Science Foundation of China (NSFC Grant 21002011), "the Fundamental Research Funds for the Central Universities'' and the Research Fund for the Doctoral Program of Higher Education of China (20100185120015).

References

 

DC FieldValueLanguage
dc.contributor.authorLai, SLen_HK
dc.contributor.authorTao, SLen_HK
dc.contributor.authorChan, MYen_HK
dc.contributor.authorLo, MFen_HK
dc.contributor.authorNg, TWen_HK
dc.contributor.authorLee, STen_HK
dc.contributor.authorZhao, WMen_HK
dc.contributor.authorLee, CSen_HK
dc.date.accessioned2011-09-23T05:44:14Z-
dc.date.available2011-09-23T05:44:14Z-
dc.date.issued2011en_HK
dc.identifier.citationJournal Of Materials Chemistry, 2011, v. 21 n. 13, p. 4983-4988en_HK
dc.identifier.issn0959-9428en_HK
dc.identifier.urihttp://hdl.handle.net/10722/139026-
dc.description.abstractWe report the synthesis of a new biscyclometalated yellow phosphorescent dopant iridium(iii) bis[2-(2-naphthyl)pyridine](acetylacetonate) (Ir(npy) 2acac) and studies of its application in organic light-emitting devices (OLEDs), in which highly efficient yellow-emitting OLEDs with high peak forward viewing efficiencies of 34 cd A -1, 22 lm W -1, and 11% can be obtained, along with the Commission de L'Eclairage 1931 chromaticity coordinates of (0.45, 0.54). More importantly, yellow phosphorescence can be achieved without the formation of excimer emission. Particularly, such devices exhibit a very broad and featureless peak at ca. 550 nm with a wide full spectral width at half maximum (FWHM) of 87 nm. Furthermore, combination with iridium(iii) bis[(3,4,5,-trifluorophenyl)-pyridinato-N,C 2′] picolinate doped p-bis-(triphenylsilyly)benzene as the blue-emitting layer yields highly efficient white OLEDs with maximum efficiencies as high as 46 cd A -1 and 41 lm W -1 in the forward direction, making Ir(npy) 2acac a promising organic phosphor for applications in yellow and white OLEDs. © The Royal Society of Chemistry 2011.en_HK
dc.languageengen_US
dc.publisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/Publishing/Journals/jm/index.aspen_HK
dc.relation.ispartofJournal of Materials Chemistryen_HK
dc.subjectAcetylacetonates-
dc.subjectBlue-emitting-
dc.subjectChromaticity coordinates-
dc.subjectExcimer emissions-
dc.subjectMaximum efficiency-
dc.titleIridium(III) bis[2-(2-naphthyl)pyridine] (acetylacetonate)-based yellow and white phosphorescent organic light-emitting devicesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0959-9428&volume=21&spage=4983&epage=4988&date=2011&atitle=Iridium(III)+bis[2-(2-naphthyl)pyridine]+(acetylacetonate)-based+yellow+and+white+phosphorescent+organic+light-emitting+devicesen_US
dc.identifier.emailChan, MY:chanmym@hku.hken_HK
dc.identifier.authorityChan, MY=rp00666en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1039/c0jm04174ben_HK
dc.identifier.scopuseid_2-s2.0-79952744498en_HK
dc.identifier.hkuros196440en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79952744498&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume21en_HK
dc.identifier.issue13en_HK
dc.identifier.spage4983en_HK
dc.identifier.epage4988en_HK
dc.identifier.isiWOS:000288450200034-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridLai, SL=7402937153en_HK
dc.identifier.scopusauthoridTao, SL=8843635800en_HK
dc.identifier.scopusauthoridChan, MY=7402597725en_HK
dc.identifier.scopusauthoridLo, MF=24332794500en_HK
dc.identifier.scopusauthoridNg, TW=24822626900en_HK
dc.identifier.scopusauthoridLee, ST=35468613000en_HK
dc.identifier.scopusauthoridZhao, WM=7403942967en_HK
dc.identifier.scopusauthoridLee, CS=35364273600en_HK

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