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Article: Highly efficient organic light-emitting devices with surface-modified metal anode by vanadium pentoxide

TitleHighly efficient organic light-emitting devices with surface-modified metal anode by vanadium pentoxide
Authors
Issue Date2008
PublisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/Journals/jpd
Citation
Journal Of Physics D: Applied Physics, 2008, v. 41 n. 6 How to Cite?
AbstractAn Au film modified by vanadium pentoxide (V2O5) has been investigated as the anode for injecting holes in organic light-emitting devices (OLEDs). It is found that OLEDs with the V2O5 modified Au anode have much lower driving voltages and much higher current efficiencies (four times higher) as compared with the OLEDs with bare Au as anode. The results of ultraviolet photoelectron spectroscopy and UV-visible spectrometer analysis indicate that the Au anode treated by V2O 5 has a smaller barrier height and thus facilitates hole injection, apart from a high optical transparency of Au/V2O5. For the OLEDs with Au/V2O5 anode, the driving voltage is decreased by 13 V and the maximum current efficiency (4.1 cd A-1) is four times higher as compared with that of the bare Au anode device (∼0.9 cd A-1). The OLEDs with Au/V2O5 anode also have about 1.4 times higher efficiency than that of the OLEDs (∼2.8 cd A -1) with ITO/V2O5 anode. © 2008 IOP Publishing Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/73772
ISSN
2015 Impact Factor: 2.772
2015 SCImago Journal Rankings: 0.682
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorZhang, HMen_HK
dc.contributor.authorChoy, WCHen_HK
dc.date.accessioned2010-09-06T06:54:37Z-
dc.date.available2010-09-06T06:54:37Z-
dc.date.issued2008en_HK
dc.identifier.citationJournal Of Physics D: Applied Physics, 2008, v. 41 n. 6en_HK
dc.identifier.issn0022-3727en_HK
dc.identifier.urihttp://hdl.handle.net/10722/73772-
dc.description.abstractAn Au film modified by vanadium pentoxide (V2O5) has been investigated as the anode for injecting holes in organic light-emitting devices (OLEDs). It is found that OLEDs with the V2O5 modified Au anode have much lower driving voltages and much higher current efficiencies (four times higher) as compared with the OLEDs with bare Au as anode. The results of ultraviolet photoelectron spectroscopy and UV-visible spectrometer analysis indicate that the Au anode treated by V2O 5 has a smaller barrier height and thus facilitates hole injection, apart from a high optical transparency of Au/V2O5. For the OLEDs with Au/V2O5 anode, the driving voltage is decreased by 13 V and the maximum current efficiency (4.1 cd A-1) is four times higher as compared with that of the bare Au anode device (∼0.9 cd A-1). The OLEDs with Au/V2O5 anode also have about 1.4 times higher efficiency than that of the OLEDs (∼2.8 cd A -1) with ITO/V2O5 anode. © 2008 IOP Publishing Ltd.en_HK
dc.languageengen_HK
dc.publisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/Journals/jpden_HK
dc.relation.ispartofJournal of Physics D: Applied Physicsen_HK
dc.titleHighly efficient organic light-emitting devices with surface-modified metal anode by vanadium pentoxideen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0022-3727&volume=41&spage=062003&epage=062005&date=2008&atitle=Highly+efficient+organic+light-emitting+devices+with+surface-modified+metal+anode+by+Vanadium+pentoxideen_HK
dc.identifier.emailChoy, WCH:chchoy@eee.hku.hken_HK
dc.identifier.authorityChoy, WCH=rp00218en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1088/0022-3727/41/6/062003en_HK
dc.identifier.scopuseid_2-s2.0-40549141137en_HK
dc.identifier.hkuros147717en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-40549141137&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume41en_HK
dc.identifier.issue6en_HK
dc.identifier.isiWOS:000254153900003-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridZhang, HM=7409194762en_HK
dc.identifier.scopusauthoridChoy, WCH=7006202371en_HK

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