Park, SJ Jung, SH Kim, JM Cho, HN 2024-01-21T07:39:49Z 2024-01-21T07:39:49Z 2021-09-02 2004-01-05 0928-4931 https://pubs.kist.re.kr/handle/201004/137934 Novel fluorene copolymers with high phenyl substitution were synthesized by using Diels-Alder polymerization of diethynyl fluorene compounds and corresponding bis-cyclopentadienone monomers. The resulting polymers with high viscosity showed good solubility in common organic solvents such as THF, CHCl3, and toluene. The spectra of polymers I and II showed maximum peaks at 330 and 340 nm for optical absorption and 476 and 455 nm for photoluminescence (PL) in the solid state, respectively. The spectra from the electroluminescence (EL) device composed of ITO/PEDOT/polymers/LiF/Al appeared at two emissive peaks at 480 and 540 nm for polymer I and at 430 with shoulder peak at 530 nm for polymer II. I-V curves of polymers I and II showed turn-on voltage of 8 and 7 V, respectively. (C) 2003 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV POLYMERS Highly phenyl-substituted fluorene copolymers for light-emitting diode Article 10.1016/j.msec.2003.09.034 1 MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS, v.24, no.1-2, pp.99 - 102 MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS 24 1-2 99 102 scie scopus 000187969700024 2-s2.0-0346258326 Materials Science, Multidisciplinary Materials Science Article; Proceedings Paper POLYMERS Diels-Alder reaction diethynylfluorene light-emitting diode