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Conference Paper: Optical functions of tris (8-hydroxyquinoline) aluminum (Alq3)

TitleOptical functions of tris (8-hydroxyquinoline) aluminum (Alq3)
Authors
KeywordsOrganic thin films
Tris (8-hydroxyquinoline) aluminum
Issue Date2002
PublisherS P I E - International Society for Optical Engineering. The Journal's web site is located at http://spie.org/x1848.xml
Citation
Proceedings Of Spie - The International Society For Optical Engineering, 2002, v. 4642, p. 118-125 How to Cite?
AbstractIn this work we report spectroscopic ellipsometry study of the optical functions of tris (8-hydroxyquinoline) aluminum (Alq3) thin films on glass substrates in the spectral range from 1.55 eV to 5 eV. Optical functions of Alq3 deposited on unheated substrates and on substrates kept at 100°C have been determined. The influence of atmosphere exposure to the optical properties has been investigated. Studies on degradation of OLEDs usually focus on changes due to crystallization of Alq3 or cathode degradation during operation (in atmosphere or encapsulated). In this work we show that exposure to atmosphere of an Alq3 layer even without deposition of metal cathode results in change of the optical properties of the layer. It has been found that deposition at higher substrate temperature yields improvement in environmental stability of the films, i.e. less decrease of the PL intensity over time with atmosphere exposure, as well as increased PL intensity. Evolution of the optical functions obtained by spectroscopic ellipsometry, absorption, and photoluminescence spectra are presented and discussed.
Persistent Identifierhttp://hdl.handle.net/10722/99260
ISSN
References

 

DC FieldValueLanguage
dc.contributor.authorDjurišić, ABen_HK
dc.contributor.authorKwong, CYen_HK
dc.contributor.authorGuo, WLen_HK
dc.contributor.authorLau, TWen_HK
dc.contributor.authorLiu, ZTen_HK
dc.contributor.authorKwok, HSen_HK
dc.contributor.authorLam, LSMen_HK
dc.contributor.authorChan, WKen_HK
dc.date.accessioned2010-09-25T18:22:22Z-
dc.date.available2010-09-25T18:22:22Z-
dc.date.issued2002en_HK
dc.identifier.citationProceedings Of Spie - The International Society For Optical Engineering, 2002, v. 4642, p. 118-125en_HK
dc.identifier.issn0277-786Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/99260-
dc.description.abstractIn this work we report spectroscopic ellipsometry study of the optical functions of tris (8-hydroxyquinoline) aluminum (Alq3) thin films on glass substrates in the spectral range from 1.55 eV to 5 eV. Optical functions of Alq3 deposited on unheated substrates and on substrates kept at 100°C have been determined. The influence of atmosphere exposure to the optical properties has been investigated. Studies on degradation of OLEDs usually focus on changes due to crystallization of Alq3 or cathode degradation during operation (in atmosphere or encapsulated). In this work we show that exposure to atmosphere of an Alq3 layer even without deposition of metal cathode results in change of the optical properties of the layer. It has been found that deposition at higher substrate temperature yields improvement in environmental stability of the films, i.e. less decrease of the PL intensity over time with atmosphere exposure, as well as increased PL intensity. Evolution of the optical functions obtained by spectroscopic ellipsometry, absorption, and photoluminescence spectra are presented and discussed.en_HK
dc.languageengen_HK
dc.publisherS P I E - International Society for Optical Engineering. The Journal's web site is located at http://spie.org/x1848.xmlen_HK
dc.relation.ispartofProceedings of SPIE - The International Society for Optical Engineeringen_HK
dc.subjectOrganic thin filmsen_HK
dc.subjectTris (8-hydroxyquinoline) aluminumen_HK
dc.titleOptical functions of tris (8-hydroxyquinoline) aluminum (Alq3)en_HK
dc.typeConference_Paperen_HK
dc.identifier.emailDjurišić, AB: dalek@hku.hken_HK
dc.identifier.emailChan, WK: waichan@hku.hken_HK
dc.identifier.authorityDjurišić, AB=rp00690en_HK
dc.identifier.authorityChan, WK=rp00667en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1117/12.470447en_HK
dc.identifier.scopuseid_2-s2.0-0036029056en_HK
dc.identifier.hkuros72546en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0036029056&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume4642en_HK
dc.identifier.spage118en_HK
dc.identifier.epage125en_HK
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridDjurišić, AB=7004904830en_HK
dc.identifier.scopusauthoridKwong, CY=35917741900en_HK
dc.identifier.scopusauthoridGuo, WL=7401967943en_HK
dc.identifier.scopusauthoridLau, TW=36920289100en_HK
dc.identifier.scopusauthoridLiu, ZT=22934686400en_HK
dc.identifier.scopusauthoridKwok, HS=36071953500en_HK
dc.identifier.scopusauthoridLam, LSM=7201984714en_HK
dc.identifier.scopusauthoridChan, WK=13310083000en_HK

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