Park, JH Park, OO Kim, J Yu, JW Kim, JK Kim, YC 2024-01-21T06:08:57Z 2024-01-21T06:08:57Z 2021-09-05 2004-11 1567-1739 https://pubs.kist.re.kr/handle/201004/137106 We synthesized a star copolymer of poly(vinylcarbazole) (PVK) branched from a fullerene (C-60) center, and investigated its optical absorption and photoluminescence properties. The chemically hybridized PVK-C-60 was then employed as a hole-transporting layer of the electroluminescent device with a poly(9,9'-dihexylfluorene-2,7-divinylene-m-phenylenevinylene-stat-p-phenylenevinylene) (CPDHFPV) emitting layer. The ITO/PVK-C-60/CPDHFPV/LiF/Al device showed a strong electroluminescence quenching due to a direct contact of the PVK-C-60 and the CPDHFPV layers. In contrast, when an additional PVK layer was introduced between the two layers, the electroluminescence was largely enhanced. The emitted light power of the ITO/PVK-C-60/PVK/CPDHFPV/LiF/Al device was improved by similar to3 times compared with the device without the PVK-C-60 layer. (C) 2004 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV C-60 ELECTROLUMINESCENCE FULLERENES POLY(N-VINYLCARBAZOLE) COPOLYMER SPECTRA FILMS Hole-transporting property of a chemically hybridized poly(vinylcarbazole)-fullerene Article 10.1016/j.cap.2003.11.066 1 CURRENT APPLIED PHYSICS, v.4, no.6, pp.659 - 662 CURRENT APPLIED PHYSICS 4 6 659 662 scie scopus kci other ART000970229 000225155400024 2-s2.0-5144233029 Materials Science, Multidisciplinary Physics, Applied Materials Science Physics Article; Proceedings Paper C-60 ELECTROLUMINESCENCE FULLERENES POLY(N-VINYLCARBAZOLE) COPOLYMER SPECTRA FILMS poly(vinylcarbazole)-ftillerene copolymer hole-transporting property light-emitting diodes (LEDs)