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Article: Carbazole-pyrene derivatives for undoped organic light-emitting devices

TitleCarbazole-pyrene derivatives for undoped organic light-emitting devices
Authors
KeywordsCarbazole
Electroluminescence
Organic light-emitting diode
Pyrene
Small-molecule
Undoped
Issue Date2011
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/orgel
Citation
Organic Electronics: Physics, Materials, Applications, 2011, v. 12 n. 3, p. 541-546 How to Cite?
AbstractTwo carbazole-pyrene derivatives, namely 3,6-dipyrenyl-9-(4′-tert- butylphenyl) carbazole (BPyC) and 3,6-dipyrenyl-9-(4′-pyrenylphenyl) carbazole (TPyC), have been designed and synthesized for application in organic light-emitting devices (OLEDs). While the two compounds have similar chemical structures and photoluminescent properties, OLEDs based on them show distinct electroluminescence (EL) spectra. The BPyC-based devices show a single peak saturated blue emission with CIE coordinates of (0.15, 0.18); whereas the TPyC-based devices exhibit two emission peaks at blue and yellow hues with CIE coordinates of (0.22, 0.29). The difference in their EL spectra is attributed to the substitution of the t-butyl unit of BPyC with a pyrenyl group to form TPyC, which effectively increases the electron-donating property and results in exciplex formation at its interface with the electron-accepting TPBI. A high external quantum efficiency of 3.11% is achieved in the TPyC-based devices. Influences of chemical structure and fluorescent quantum yield on the efficiency of exciplex emission are discussed. © 2011 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/139025
ISSN
2015 Impact Factor: 3.471
2015 SCImago Journal Rankings: 1.215
ISI Accession Number ID
Funding AgencyGrant Number
Research Grants Council of the Hong Kong Special Administrative Region, ChinaCityU 101508
National Science Foundation of China91027041
Key Laboratory of Photochemical Conversion and Optoelectronic Materials, TIPC, CAS
Funding Information:

This work was supported by the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. CityU 101508). Q. X. Tong thanks his financial supports from the National Science Foundation of China (No. 91027041) and the Key Laboratory of Photochemical Conversion and Optoelectronic Materials, TIPC, CAS.

References

 

DC FieldValueLanguage
dc.contributor.authorLai, SLen_HK
dc.contributor.authorTong, QXen_HK
dc.contributor.authorChan, MYen_HK
dc.contributor.authorNg, TWen_HK
dc.contributor.authorLo, MFen_HK
dc.contributor.authorKo, CCen_HK
dc.contributor.authorLee, STen_HK
dc.contributor.authorLee, CSen_HK
dc.date.accessioned2011-09-23T05:44:13Z-
dc.date.available2011-09-23T05:44:13Z-
dc.date.issued2011en_HK
dc.identifier.citationOrganic Electronics: Physics, Materials, Applications, 2011, v. 12 n. 3, p. 541-546en_HK
dc.identifier.issn1566-1199en_HK
dc.identifier.urihttp://hdl.handle.net/10722/139025-
dc.description.abstractTwo carbazole-pyrene derivatives, namely 3,6-dipyrenyl-9-(4′-tert- butylphenyl) carbazole (BPyC) and 3,6-dipyrenyl-9-(4′-pyrenylphenyl) carbazole (TPyC), have been designed and synthesized for application in organic light-emitting devices (OLEDs). While the two compounds have similar chemical structures and photoluminescent properties, OLEDs based on them show distinct electroluminescence (EL) spectra. The BPyC-based devices show a single peak saturated blue emission with CIE coordinates of (0.15, 0.18); whereas the TPyC-based devices exhibit two emission peaks at blue and yellow hues with CIE coordinates of (0.22, 0.29). The difference in their EL spectra is attributed to the substitution of the t-butyl unit of BPyC with a pyrenyl group to form TPyC, which effectively increases the electron-donating property and results in exciplex formation at its interface with the electron-accepting TPBI. A high external quantum efficiency of 3.11% is achieved in the TPyC-based devices. Influences of chemical structure and fluorescent quantum yield on the efficiency of exciplex emission are discussed. © 2011 Elsevier B.V. All rights reserved.en_HK
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/orgelen_HK
dc.relation.ispartofOrganic Electronics: physics, materials, applicationsen_HK
dc.subjectCarbazoleen_HK
dc.subjectElectroluminescenceen_HK
dc.subjectOrganic light-emitting diodeen_HK
dc.subjectPyreneen_HK
dc.subjectSmall-moleculeen_HK
dc.subjectUndopeden_HK
dc.titleCarbazole-pyrene derivatives for undoped organic light-emitting devicesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1566-1199&volume=12&spage=541&epage=546&date=2011&atitle=Carbazole-pyrene+derivatives+for+undoped+organic+light-emitting+devicesen_US
dc.identifier.emailChan, MY:chanmym@hku.hken_HK
dc.identifier.authorityChan, MY=rp00666en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.orgel.2010.12.026en_HK
dc.identifier.scopuseid_2-s2.0-79551552031en_HK
dc.identifier.hkuros196436en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79551552031&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume12en_HK
dc.identifier.issue3en_HK
dc.identifier.spage541en_HK
dc.identifier.epage546en_HK
dc.identifier.isiWOS:000287322800022-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridLai, SL=7402937153en_HK
dc.identifier.scopusauthoridTong, QX=36919358700en_HK
dc.identifier.scopusauthoridChan, MY=7402597725en_HK
dc.identifier.scopusauthoridNg, TW=24822626900en_HK
dc.identifier.scopusauthoridLo, MF=24332794500en_HK
dc.identifier.scopusauthoridKo, CC=7202596455en_HK
dc.identifier.scopusauthoridLee, ST=7601407495en_HK
dc.identifier.scopusauthoridLee, CS=7410152608en_HK
dc.identifier.citeulike8609254-

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