Lee, TW Park, OO Cho, HN Kim, YC 2024-01-21T09:41:28Z 2024-01-21T09:41:28Z 2021-09-01 2002-11-20 0379-6779 https://pubs.kist.re.kr/handle/201004/139045 We report the realization of efficient and color-variable organic electroluminescent (EL) devices which employ the cascade energy transfer in a dye-doped ternary polymer blend. Fluorene-based light-emitting polymers, poly(2,7-bis(p-stiryl)-9,9'-di-n-hexylfluorene sebacate) (PBSDHFS) and poly(9,9'-di-n-hexylfluorenediylvinylene-alt-1,4-phenylenevinylene) (PDHFPPV), and a laser dye, DCM were used for this study. Forster excitation energy transfer in the PBSDHFS/PDHFPPV (98w/2w), PDHFPPV/DCM (98w/2w), PBSDHFS/DCM (98w/2w), and PBSDHFS/PDHFPPV/DCM (98w/2w/2w) blend played an essential role in achieving color-tunability as well as high efficiency due to the reduced self-absorption loss and concentration quenching. The EL device made of the PBSDHFS/PDHFPPV/DCM (98w/2w/2w) blend showed the highest EL quantum efficiency (QE). We attribute this result to an effective carrier trapping capability of DCM as well as the excitation energy transfer. (C) 2002 Elsevier Science B.V. All rights reserved. English ELSEVIER SCIENCE SA AMPLIFIED SPONTANEOUS EMISSION CONJUGATED POLYMERS ELECTROLUMINESCENCE EFFICIENCY FILMS Cascade energy transfer in dye-doped ternary polymer blend light-emitting diodes Article 10.1016/S0379-6779(02)00175-3 1 SYNTHETIC METALS, v.131, no.1-3, pp.129 - 133 SYNTHETIC METALS 131 1-3 129 133 scie scopus 000179515700017 2-s2.0-0037146060 Materials Science, Multidisciplinary Physics, Condensed Matter Polymer Science Materials Science Physics Polymer Science Article AMPLIFIED SPONTANEOUS EMISSION CONJUGATED POLYMERS ELECTROLUMINESCENCE EFFICIENCY FILMS dye-doped polymer light-emitting diodes (LEDs) multicomponent polymer blends cascade energy transfer