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Article: High efficiency blue organic LEDs achieved by an integrated fluorescence-interlayer-phosphorescence emission architecture

TitleHigh efficiency blue organic LEDs achieved by an integrated fluorescence-interlayer-phosphorescence emission architecture
Authors
KeywordsCharge carrier transport
Energy transfer
Fluorescence
Organic lighting-emitting devices
Phosphorescence
Issue Date2010
PublisherWiley - V C H Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.wiley-vch.de/home/afm
Citation
Advanced Functional Materials, 2010, v. 20 n. 4, p. 648-655 How to Cite?
AbstractThis paper presents a new strategy to develop efficient organic light-emitting devices (OLEDs) by doping fluorescent- and phosphorescent-type emitters individually into two different hosts separated by an interlayer to form a fluorescence-interlayer-phosphorescence (FIP) emission architecture. One blue OLED with FIP emission structure comprising p-bis(p-N,N- diphenylaminostyryl)benzene (DSA-Ph) and bis[(4,6-di-fluorophenyl)-pyridinate-N, C2']picoIinate (Flrpic) exhibiting a peak luminance efficiency of 15.8cdA-1 at 1.54 mA cm-2 and a power efficiency of 10.2 lm W-1 at 0.1 mA cm-2 is successfully demonstrated. The results are higher than those of typical phosphorescent OLEDs with a single emission layer by 34% and 28%, respectively. From experimental and theoretical investigations on device performance, and the functions of the used emitters and interlayer, such enhancement should ascribe to the appropriate utilization of the two types of emitters. The fluorescent emitter of DSA-Ph is used to facilitate the carrier transport, and thus accelerate the generation of excitons, while the phosphorescent emitter of Flrpic could convert the generated excitons into light efficiently. The method proposed here can be applied for developing other types of red, green, and white OLEDs. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA.
Persistent Identifierhttp://hdl.handle.net/10722/73620
ISSN
2015 Impact Factor: 11.382
2015 SCImago Journal Rankings: 5.210
ISI Accession Number ID
Funding AgencyGrant Number
Research Grant Council of the HK Special Administrative Region, China14300.324.01
HKU 712108
Funding Information:

This work is supported by the grants (#14300.324.01 and HKU#712108) from the Research Grant Council of the HK Special Administrative Region, China. We would like to thank Mr. Xiaoming He for his help in the measurement of photophysical properties of organic semiconductor materials. Supporting Information is available online from Wiley Interscience or from the authors.

References

 

DC FieldValueLanguage
dc.contributor.authorZheng, Ten_HK
dc.contributor.authorChoy, WCHen_HK
dc.date.accessioned2010-09-06T06:53:08Z-
dc.date.available2010-09-06T06:53:08Z-
dc.date.issued2010en_HK
dc.identifier.citationAdvanced Functional Materials, 2010, v. 20 n. 4, p. 648-655en_HK
dc.identifier.issn1616-301Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/73620-
dc.description.abstractThis paper presents a new strategy to develop efficient organic light-emitting devices (OLEDs) by doping fluorescent- and phosphorescent-type emitters individually into two different hosts separated by an interlayer to form a fluorescence-interlayer-phosphorescence (FIP) emission architecture. One blue OLED with FIP emission structure comprising p-bis(p-N,N- diphenylaminostyryl)benzene (DSA-Ph) and bis[(4,6-di-fluorophenyl)-pyridinate-N, C2']picoIinate (Flrpic) exhibiting a peak luminance efficiency of 15.8cdA-1 at 1.54 mA cm-2 and a power efficiency of 10.2 lm W-1 at 0.1 mA cm-2 is successfully demonstrated. The results are higher than those of typical phosphorescent OLEDs with a single emission layer by 34% and 28%, respectively. From experimental and theoretical investigations on device performance, and the functions of the used emitters and interlayer, such enhancement should ascribe to the appropriate utilization of the two types of emitters. The fluorescent emitter of DSA-Ph is used to facilitate the carrier transport, and thus accelerate the generation of excitons, while the phosphorescent emitter of Flrpic could convert the generated excitons into light efficiently. The method proposed here can be applied for developing other types of red, green, and white OLEDs. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA.en_HK
dc.languageengen_HK
dc.publisherWiley - V C H Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.wiley-vch.de/home/afmen_HK
dc.relation.ispartofAdvanced Functional Materialsen_HK
dc.subjectCharge carrier transport-
dc.subjectEnergy transfer-
dc.subjectFluorescence-
dc.subjectOrganic lighting-emitting devices-
dc.subjectPhosphorescence-
dc.titleHigh efficiency blue organic LEDs achieved by an integrated fluorescence-interlayer-phosphorescence emission architectureen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1616-301X&volume=20&issue=4&spage=648&epage=655&date=2010&atitle=High+efficiency+blue+organic+LEDs+achieved+by+an+integrated+fluorescence-interlayer-phosphorescence+emission+architectureen_HK
dc.identifier.emailChoy, WCH:chchoy@eee.hku.hken_HK
dc.identifier.authorityChoy, WCH=rp00218en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/adfm.200901657en_HK
dc.identifier.scopuseid_2-s2.0-77249098759en_HK
dc.identifier.hkuros169621en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-77249098759&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume20en_HK
dc.identifier.issue4en_HK
dc.identifier.spage648en_HK
dc.identifier.epage655en_HK
dc.identifier.eissn1616-3028-
dc.identifier.isiWOS:000275137900015-
dc.publisher.placeGermanyen_HK
dc.identifier.scopusauthoridZheng, T=26427890900en_HK
dc.identifier.scopusauthoridChoy, WCH=7006202371en_HK

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