Polynorbornene Copolymer with Side-Chain Iridium(III) Emitters and Carbazole Hosts: A Single Emissive Layer Material for Highly Efficient Electrophosphorescent Devices

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dc.contributor.authorPark, Jun-Hako
dc.contributor.authorKoh, Tae-Wookko
dc.contributor.authorChung, Jinko
dc.contributor.authorPark, Sung-Hoonko
dc.contributor.authorEo, Maeng-Sunko
dc.contributor.authorDo, Young-Kyuko
dc.contributor.authorYoo, Seung-Hyupko
dc.contributor.authorLee, Min-Hyungko
dc.date.accessioned2013-08-08T05:45:14Z-
dc.date.available2013-08-08T05:45:14Z-
dc.date.created2013-03-18-
dc.date.created2013-03-18-
dc.date.issued2013-02-
dc.identifier.citationMACROMOLECULES, v.46, no.3, pp.674 - 682-
dc.identifier.issn0024-9297-
dc.identifier.urihttp://hdl.handle.net/10203/174580-
dc.description.abstractVinyl addition copolymerization of norbornene monomers using a Pd(II) catalyst in combination with 1-octene chain transfer agent efficiently produces well-defined soluble polynorbornene copolymers bearing side-chain (C boolean AND N)(2)Ir(O boolean AND O) emitters (C boolean AND N = 2-(4,6-difluorophenyl)-pyridine (M-3); 2-phenyl-pyridine (M-4); 2-(benzo[b]-thiophen-2-yl)-pyridine (M-5), O boolean AND O = acetylacetonato) and 9,9 '-(1,3-phenylene)bis-9H-carbazole (mCP) or 9,9 '-(1,1 '-biphenyl)-4,4 '-diylbis-9H-carbazole (CBP) host moieties (M-1 and M-2). The catalytic system provides high-molecular-weight copolymers (M-w = 151 000-457 000 g/mol) with a controlled incorporation of monomers. All copolymers possess high thermal stability with high decomposition (T-d5 > 400 degrees C) and glass transition temperatures (T-g > 330 degrees C). Among the solution-processed devices fabricated based on a single emissive layer comprising the blue-, green-, and red-phosphorescent copolymers (PBn, PGn, and PRn, n = 1-4) with various concentrations of emitters (1.7-13.9 mol %-Ir), the devices based on PB4 (10.5 mol %-Ir), PG2 (5.3 mol %-Ir), and PR4 (13.9 mol %-Ir) display the best performances with maximum power efficiencies of 12.9, 25.6, and 3.3 lm/W and maximum external quantum efficiencies of 8.8, 13.3, and 5.1%, respectively, for each color. These results correspond to almost double the efficiencies of the corresponding doped polymer systems and are outstanding among the polymeric rivals reported thus far.-
dc.languageEnglish-
dc.publisherAMER CHEMICAL SOC-
dc.subjectLIGHT-EMITTING-DIODES-
dc.subjectORGANIC ELECTROLUMINESCENT DEVICES-
dc.subjectENERGY-TRANSFER-
dc.subjectTRIPLET ENERGY-
dc.subjectBLUE ELECTROPHOSPHORESCENCE-
dc.subjectPHOSPHORESCENT EMISSION-
dc.subjectCONJUGATED POLYMERS-
dc.subjectCOMPLEXES-
dc.subjectPOLYMERIZATION-
dc.subjectNORBORNENE-
dc.titlePolynorbornene Copolymer with Side-Chain Iridium(III) Emitters and Carbazole Hosts: A Single Emissive Layer Material for Highly Efficient Electrophosphorescent Devices-
dc.typeArticle-
dc.identifier.wosid000315018400013-
dc.identifier.scopusid2-s2.0-84873687355-
dc.type.rimsART-
dc.citation.volume46-
dc.citation.issue3-
dc.citation.beginningpage674-
dc.citation.endingpage682-
dc.citation.publicationnameMACROMOLECULES-
dc.identifier.doi10.1021/ma302342p-
dc.embargo.liftdate9999-12-31-
dc.embargo.terms9999-12-31-
dc.contributor.localauthorDo, Young-Kyu-
dc.contributor.localauthorYoo, Seung-Hyup-
dc.contributor.nonIdAuthorPark, Jun-Ha-
dc.contributor.nonIdAuthorChung, Jin-
dc.contributor.nonIdAuthorPark, Sung-Hoon-
dc.contributor.nonIdAuthorLee, Min-Hyung-
dc.type.journalArticleArticle-
dc.subject.keywordPlusLIGHT-EMITTING-DIODES-
dc.subject.keywordPlusORGANIC ELECTROLUMINESCENT DEVICES-
dc.subject.keywordPlusENERGY-TRANSFER-
dc.subject.keywordPlusTRIPLET ENERGY-
dc.subject.keywordPlusBLUE ELECTROPHOSPHORESCENCE-
dc.subject.keywordPlusPHOSPHORESCENT EMISSION-
dc.subject.keywordPlusCONJUGATED POLYMERS-
dc.subject.keywordPlusCOMPLEXES-
dc.subject.keywordPlusPOLYMERIZATION-
dc.subject.keywordPlusNORBORNENE-
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