DC Field | Value | Language |
---|---|---|
dc.contributor.author | Park, Jun-Ha | ko |
dc.contributor.author | Yun, Chang-Hun | ko |
dc.contributor.author | Koh, Tae-Wook | ko |
dc.contributor.author | Do, Young-Kyu | ko |
dc.contributor.author | Yoo, Seung-Hyup | ko |
dc.contributor.author | Lee, Min-Hyung | ko |
dc.date.accessioned | 2013-03-11T01:51:53Z | - |
dc.date.available | 2013-03-11T01:51:53Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2011 | - |
dc.identifier.citation | JOURNAL OF MATERIALS CHEMISTRY, v.21, no.14, pp.5422 - 5429 | - |
dc.identifier.issn | 0959-9428 | - |
dc.identifier.uri | http://hdl.handle.net/10203/97974 | - |
dc.description.abstract | The soluble polynorbornene (P1) bearing 9,9'-(1,1'-biphenyl)-4,4'-diylbis-9H-carbazole (CBP) side groups was investigated as a host material for green emitters in phosphorescent OLED devices. The vinyl addition polymerization of norbornene monomers using Pd(II) catalyst efficiently produces P1 in combination with 1-octene chain transfer agent. P1 exhibits high thermal stability with high decomposition (T(d5) > 451 degrees C) and glass transition temperatures (T(g) > 361 degrees C). The HOMO (ca. -5.5 eV) and LUMO (ca. -2.1 eV) levels with the triplet energy of ca. 2.60 eV suggest that P1 is suitable for a host material for green emitters. The solution-processed devices based on the emissive layers containing P1 host doped with various concentration of fac-Ir(ppy)(3) (1-6 wt%) display stable green emission of fac-Ir(ppy)(3) with high device performances. The external quantum efficiency and power efficiency reach 7.2% and 11 lm/ W, respectively, at the optimum doping concentration of fac-Ir(ppy)(3) (2 wt%). The device performances are found to be slightly lower than those of PhOLED with molecular CBP host but higher than those of a PVK-based device. It is shown that in conjunction with the good processability of polynorbornene backbones, the high levels of the effective hole and electron mobilities of P1 (ca. 10(-3) and 10(-5) cm(2)/Vs, respectively) as well as large triplet energy inherited from CBP side groups are mainly responsible for the high performance of the phosphorescent OLEDs with solution-processed P1 host: emitter layers. | - |
dc.language | English | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.subject | IRIDIUM COMPLEXES | - |
dc.subject | TRIPLET-ENERGY | - |
dc.subject | ELECTROPHOSPHORESCENT DEVICES | - |
dc.subject | ELECTROLUMINESCENT DEVICES | - |
dc.subject | COORDINATION-COMPOUNDS | - |
dc.subject | CONJUGATED POLYMERS | - |
dc.subject | CARBAZOLE COMPOUNDS | - |
dc.subject | COPOLYMERS | - |
dc.subject | BLUE | - |
dc.subject | EMISSION | - |
dc.title | Vinyl-type polynorbornene with 9,9 -(1,1 -biphenyl)-4,4 -diylbis-9H-carbazole side groups as a host material for highly efficient green phosphorescent organic light-emitting diodes | - |
dc.type | Article | - |
dc.identifier.wosid | 000288659500033 | - |
dc.identifier.scopusid | 2-s2.0-79954610175 | - |
dc.type.rims | ART | - |
dc.citation.volume | 21 | - |
dc.citation.issue | 14 | - |
dc.citation.beginningpage | 5422 | - |
dc.citation.endingpage | 5429 | - |
dc.citation.publicationname | JOURNAL OF MATERIALS CHEMISTRY | - |
dc.contributor.localauthor | Do, Young-Kyu | - |
dc.contributor.localauthor | Yoo, Seung-Hyup | - |
dc.contributor.nonIdAuthor | Lee, Min-Hyung | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | IRIDIUM COMPLEXES | - |
dc.subject.keywordPlus | TRIPLET-ENERGY | - |
dc.subject.keywordPlus | ELECTROPHOSPHORESCENT DEVICES | - |
dc.subject.keywordPlus | ELECTROLUMINESCENT DEVICES | - |
dc.subject.keywordPlus | COORDINATION-COMPOUNDS | - |
dc.subject.keywordPlus | CONJUGATED POLYMERS | - |
dc.subject.keywordPlus | CARBAZOLE COMPOUNDS | - |
dc.subject.keywordPlus | COPOLYMERS | - |
dc.subject.keywordPlus | BLUE | - |
dc.subject.keywordPlus | EMISSION | - |
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