File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Influences of connecting unit architecture on the performance of tandem organic light-emitting devices

TitleInfluences of connecting unit architecture on the performance of tandem organic light-emitting devices
Authors
Issue Date2007
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, 2007, v. 17 n. 14, p. 2509-2514 How to Cite?
AbstractThe present work investigates the influence of the n-type layer in the connecting unit on the performance of tandem organic light-emitting devices (OLEDs). The n-type layer is typically an organic electron-transporting layer doped with reactive metals. By systematically varying the metal dopants and the electron-transporting hosts, we have identified the important factors affecting the performance of the tandem OLEDs. Contrary to common belief, device characteristics were found to be insensitive to metal work functions, as supported by the ultraviolet photoemission spectroscopy results that the lowest unoccupied molecular orbitals of all metal-doped n-type layers studied here have similar energy levels. It suggests that the electron injection barriers from the connecting units are not sensitive to the metal dopant used. On the other hand, it was found that performance of the n-type layers depends on their electrical conductivities which can be improved by using an electron- transporting host with higher electron mobility. This effect is further modulated by the optical transparency of constituent organic layers. The efficiency of tandem OLEDs would decrease as the optical transmittance decreases. © 2007 WILEY-VCH Verlag GmbH & Co. KGaA.
Persistent Identifierhttp://hdl.handle.net/10722/168145
ISSN
2015 Impact Factor: 11.382
2015 SCImago Journal Rankings: 5.210
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorChan, MYen_US
dc.contributor.authorLai, SLen_US
dc.contributor.authorLau, KMen_US
dc.contributor.authorFung, MKen_US
dc.contributor.authorLee, CSen_US
dc.contributor.authorLee, STen_US
dc.date.accessioned2012-10-08T03:15:37Z-
dc.date.available2012-10-08T03:15:37Z-
dc.date.issued2007en_US
dc.identifier.citationAdvanced Functional Materials, 2007, v. 17 n. 14, p. 2509-2514en_US
dc.identifier.issn1616-301Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/168145-
dc.description.abstractThe present work investigates the influence of the n-type layer in the connecting unit on the performance of tandem organic light-emitting devices (OLEDs). The n-type layer is typically an organic electron-transporting layer doped with reactive metals. By systematically varying the metal dopants and the electron-transporting hosts, we have identified the important factors affecting the performance of the tandem OLEDs. Contrary to common belief, device characteristics were found to be insensitive to metal work functions, as supported by the ultraviolet photoemission spectroscopy results that the lowest unoccupied molecular orbitals of all metal-doped n-type layers studied here have similar energy levels. It suggests that the electron injection barriers from the connecting units are not sensitive to the metal dopant used. On the other hand, it was found that performance of the n-type layers depends on their electrical conductivities which can be improved by using an electron- transporting host with higher electron mobility. This effect is further modulated by the optical transparency of constituent organic layers. The efficiency of tandem OLEDs would decrease as the optical transmittance decreases. © 2007 WILEY-VCH Verlag GmbH & Co. KGaA.en_US
dc.languageengen_US
dc.publisherWiley - V C H Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.wiley-vch.de/home/afmen_US
dc.relation.ispartofAdvanced Functional Materialsen_US
dc.titleInfluences of connecting unit architecture on the performance of tandem organic light-emitting devicesen_US
dc.typeArticleen_US
dc.identifier.emailChan, MY:chanmym@hku.hken_US
dc.identifier.authorityChan, MY=rp00666en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1002/adfm.200600642en_US
dc.identifier.scopuseid_2-s2.0-34948831488en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-34948831488&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume17en_US
dc.identifier.issue14en_US
dc.identifier.spage2509en_US
dc.identifier.epage2514en_US
dc.identifier.isiWOS:000250018800033-
dc.publisher.placeGermanyen_US
dc.identifier.scopusauthoridChan, MY=7402597725en_US
dc.identifier.scopusauthoridLai, SL=7402937153en_US
dc.identifier.scopusauthoridLau, KM=7401559812en_US
dc.identifier.scopusauthoridFung, MK=7101955091en_US
dc.identifier.scopusauthoridLee, CS=35364273600en_US
dc.identifier.scopusauthoridLee, ST=7601407495en_US

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats