Optimization of polymeric host composition for polymer-based electrophosphorescent devices

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We have demonstrated an optimized polymeric host material comprising a blend of poly (9-vinylcarbazole) (PVK) and a fluorescent polymer for a highly efficient electrophosphorescence system. Although the chemical compatibility between the blue-emitting-fluorescent polymer and iridium complex, tris[2-phenylpyridine]iridium(III) (Ir-(ppy)(3)) is very poor, efficient energy transfers from the blended host to the Ir complex was observed when a small amount of blue-emitting-fluorescent polymer was added to the PVK matrix. The device showed a maximum external quantum efficiency at 5 wt% blue-emitting-fluorescent polymer and 8 wt% Ir complex doping concentrations. (C) 2008 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2009-05
Language
English
Article Type
Article
Keywords

LIGHT-EMITTING-DIODES; IRIDIUM COMPLEX; ELECTROLUMINESCENT DEVICES; CONJUGATED POLYMERS; ENERGY-TRANSFER; PHOSPHORESCENCE; EFFICIENCY; BLENDS

Citation

JOURNAL OF LUMINESCENCE, v.129, no.5, pp.496 - 500

ISSN
0022-2313
DOI
10.1016/j.jlumin.2008.12.004
URI
http://hdl.handle.net/10203/93621
Appears in Collection
CBE-Journal Papers(저널논문)
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