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Conference Paper: Improved performance of OLEDs with ITO surface treatments
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TitleImproved performance of OLEDs with ITO surface treatments
 
AuthorsLi, CN2 1
Kwong, CY2
Djurišić, AB2
Lai, PT2
Chui, PC2
Chan, WK2
Liu, SY1
 
KeywordsITO surface treatment
Organic light emitting diodes
 
Issue Date2005
 
PublisherElsevier S.A.. The Journal's web site is located at http://www.elsevier.com/locate/tsf
 
CitationThin Solid Films, 2005, v. 477 n. 1-2, p. 57-62 [How to Cite?]
DOI: http://dx.doi.org/10.1016/j.tsf.2004.08.111
 
AbstractIn this work, we performed systematic study of the influence of oxidative (ultraviolet (UV) ozone) and acid treatments and their combinations on the ITO parameters (work function, carrier concentration and mobility, surface roughness and morphology) and the performance of organic light emitting diodes (OLEDs) fabricated on ITO treated with different treatments. ITO substrates were characterized by Hall measurements, Seebeck coefficient measurements, and surface probe microscopy. After characterization of ITO, we deposited 100 nm (N,N′-di(naphthalene-1-yl)-N,N′-diphenyl-benzidine (NPB) film on the surface of ITO substrates treated with different treatments and characterized it with surface probe microscopy and Seebeck coefficient measurements. Then, OLEDs with structure ITO/NPB/rubrene/tris (8-hydroxyquinoline) aluminum (Alq 3)/LiF/Al were fabricated. The device performance was related to the ITO surface morphology and the ITO work function, while there was no obvious relationship to the ITO carrier concentration and mobility. From the treatments investigated here, it is not possible to distinguish whether relatively flat surface with isolated high spikes is sufficient on its own for good performance, or high work function value together with such surface morphology is required. The maximum luminous efficiency of 2.0 lm/W was obtained for ITO/NPB/rubrene/Alq 3/LiF/Al OLED with HCl followed by UV ozone treatment compared to 1.7 lm/W with UV ozone treatment only. © 2004 Elsevier B.V. All rights reserved.
 
ISSN0040-6090
2012 Impact Factor: 1.604
2012 SCImago Journal Rankings: 0.814
 
DOIhttp://dx.doi.org/10.1016/j.tsf.2004.08.111
 
ISI Accession Number IDWOS:000227825600012
 
ReferencesReferences in Scopus
 
DC FieldValue
dc.contributor.authorLi, CN
 
dc.contributor.authorKwong, CY
 
dc.contributor.authorDjurišić, AB
 
dc.contributor.authorLai, PT
 
dc.contributor.authorChui, PC
 
dc.contributor.authorChan, WK
 
dc.contributor.authorLiu, SY
 
dc.date.accessioned2010-09-06T06:16:42Z
 
dc.date.available2010-09-06T06:16:42Z
 
dc.date.issued2005
 
dc.description.abstractIn this work, we performed systematic study of the influence of oxidative (ultraviolet (UV) ozone) and acid treatments and their combinations on the ITO parameters (work function, carrier concentration and mobility, surface roughness and morphology) and the performance of organic light emitting diodes (OLEDs) fabricated on ITO treated with different treatments. ITO substrates were characterized by Hall measurements, Seebeck coefficient measurements, and surface probe microscopy. After characterization of ITO, we deposited 100 nm (N,N′-di(naphthalene-1-yl)-N,N′-diphenyl-benzidine (NPB) film on the surface of ITO substrates treated with different treatments and characterized it with surface probe microscopy and Seebeck coefficient measurements. Then, OLEDs with structure ITO/NPB/rubrene/tris (8-hydroxyquinoline) aluminum (Alq 3)/LiF/Al were fabricated. The device performance was related to the ITO surface morphology and the ITO work function, while there was no obvious relationship to the ITO carrier concentration and mobility. From the treatments investigated here, it is not possible to distinguish whether relatively flat surface with isolated high spikes is sufficient on its own for good performance, or high work function value together with such surface morphology is required. The maximum luminous efficiency of 2.0 lm/W was obtained for ITO/NPB/rubrene/Alq 3/LiF/Al OLED with HCl followed by UV ozone treatment compared to 1.7 lm/W with UV ozone treatment only. © 2004 Elsevier B.V. All rights reserved.
 
dc.description.natureLink_to_subscribed_fulltext
 
dc.identifier.citationThin Solid Films, 2005, v. 477 n. 1-2, p. 57-62 [How to Cite?]
DOI: http://dx.doi.org/10.1016/j.tsf.2004.08.111
 
dc.identifier.doihttp://dx.doi.org/10.1016/j.tsf.2004.08.111
 
dc.identifier.epage62
 
dc.identifier.hkuros97391
 
dc.identifier.isiWOS:000227825600012
 
dc.identifier.issn0040-6090
2012 Impact Factor: 1.604
2012 SCImago Journal Rankings: 0.814
 
dc.identifier.issue1-2
 
dc.identifier.openurl
 
dc.identifier.scopuseid_2-s2.0-14644388214
 
dc.identifier.spage57
 
dc.identifier.urihttp://hdl.handle.net/10722/69773
 
dc.identifier.volume477
 
dc.languageeng
 
dc.publisherElsevier S.A.. The Journal's web site is located at http://www.elsevier.com/locate/tsf
 
dc.publisher.placeSwitzerland
 
dc.relation.ispartofThin Solid Films
 
dc.relation.referencesReferences in Scopus
 
dc.subjectITO surface treatment
 
dc.subjectOrganic light emitting diodes
 
dc.titleImproved performance of OLEDs with ITO surface treatments
 
dc.typeConference_Paper
 
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Author Affiliations
  1. Jilin University
  2. The University of Hong Kong