Synthesis and Characterization of Indeno[1,2-b]fluorene-Based White Light-Emitting Copolymer

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dc.contributor.authorJeong, Eun-Jaeko
dc.contributor.authorKim, Sun-Heeko
dc.contributor.authorJung, In-Hwanko
dc.contributor.authorXia, Yangjunko
dc.contributor.authorLee, Kwang-Heeko
dc.contributor.authorSuh, Hong-Sukko
dc.contributor.authorShim, Hong-Kuko
dc.contributor.authorWoo, Han-Youngko
dc.date.accessioned2013-03-12T13:18:23Z-
dc.date.available2013-03-12T13:18:23Z-
dc.date.created2012-02-06-
dc.date.created2012-02-06-
dc.date.issued2009-07-
dc.identifier.citationJOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, v.47, no.14, pp.3467 - 3479-
dc.identifier.issn0887-624X-
dc.identifier.urihttp://hdl.handle.net/10203/102447-
dc.description.abstractAn indenofluorene-based copolymer containing blue-, green-, and red light-emitting moieties was synthesized by Suzuki polymerization and examined for application in white organic light-emitting diodes (WOLEDs). Tetraoctylindenofluorene(IF), 2,1,3-benzothiadiazole (BT), and 4,7-bis(2-thienyl)-2,1,3-benzothiadiazole (DBT) derivatives were used as the blue-, green-, and red-light emitting structures, respectively. The number-average molecular weight of the polymer was determined to be 25,900 g/mol with a polydispersity index of 2.02. The polymer was thermally stable (T(d) = similar to 398 degrees C) and quite soluble in common organic solvents, forming an optical-quality film by spin casting. The EL characteristics were fine-tuned from the single copolymer through incomplete fluorescence energy transfer by adjusting the composition of the red/green/blue units in the copolymer. The EL device using the indenofluorene-based copolymer containing 0.01 mol % BT and 0.02 mol % DBT units (PIF-BT01-DBT02) showed a maximum brightness of 4088 cd/m(2) at 8 V and a maximum current efficiency of 0.36 cd/A with Commission Internationale de L'Eclairage (CIE) coordinates of (0.34, 0.32). The EL emission of PIF-BT01-DBT02 was stable with respect to changes in voltage. The color emitted was dependent on the thickness of the active polymer layer; layer (similar to 60 nm) too thin was unsuitable for realizing WOLED via energy transfer. (C) 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 3467-3479, 2009-
dc.languageEnglish-
dc.publisherJOHN WILEY SONS INC-
dc.subjectFLUORENE-BASED COPOLYMERS-
dc.subjectSINGLE-POLYMER SYSTEM-
dc.subjectHIGH-EFFICIENCY-
dc.subjectCONJUGATED POLYMERS-
dc.subjectMAIN-CHAIN-
dc.subjectELECTROLUMINESCENT DEVICES-
dc.subjectSIMULTANEOUS BLUE-
dc.subjectRED EMISSION-
dc.subjectDIODES-
dc.subjectPOLYFLUORENE-
dc.titleSynthesis and Characterization of Indeno[1,2-b]fluorene-Based White Light-Emitting Copolymer-
dc.typeArticle-
dc.identifier.wosid000267444200002-
dc.identifier.scopusid2-s2.0-67650693061-
dc.type.rimsART-
dc.citation.volume47-
dc.citation.issue14-
dc.citation.beginningpage3467-
dc.citation.endingpage3479-
dc.citation.publicationnameJOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY-
dc.identifier.doi10.1002/pola.23422-
dc.contributor.localauthorShim, Hong-Ku-
dc.contributor.nonIdAuthorJeong, Eun-Jae-
dc.contributor.nonIdAuthorKim, Sun-Hee-
dc.contributor.nonIdAuthorXia, Yangjun-
dc.contributor.nonIdAuthorLee, Kwang-Hee-
dc.contributor.nonIdAuthorSuh, Hong-Suk-
dc.contributor.nonIdAuthorWoo, Han-Young-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorconjugated polymers-
dc.subject.keywordAuthorcopolymerization-
dc.subject.keywordAuthorlight-emitting diodes (LED)-
dc.subject.keywordPlusFLUORENE-BASED COPOLYMERS-
dc.subject.keywordPlusSINGLE-POLYMER SYSTEM-
dc.subject.keywordPlusHIGH-EFFICIENCY-
dc.subject.keywordPlusCONJUGATED POLYMERS-
dc.subject.keywordPlusMAIN-CHAIN-
dc.subject.keywordPlusELECTROLUMINESCENT DEVICES-
dc.subject.keywordPlusSIMULTANEOUS BLUE-
dc.subject.keywordPlusRED EMISSION-
dc.subject.keywordPlusDIODES-
dc.subject.keywordPlusPOLYFLUORENE-
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