White polymer light-emitting devices from ternary-polymer blend with concentration gradient

We have fabricated a white polymer light-emitting-diode bilayer structure that contains a ternary polymer blend. The first layer of poly(9-vinylcarbazole) acts as an energy donor and electron blocker, and the second layer comprising an immiscible polymer blend of two light-emitting polymers, poly(9,9'-dihexylfluorene-2,7-divinylene-m-phenylenevinylene-stat-p-phenylenevinylene) and poly(2-methoxy-5-(2'-ethyl-hexyloxy)-1,4-phenylenevinylene), emits light. The emissive white color of the device was observed to be practically independent of the driving voltage (near CIE coordinate; 0.33, 0.33). In addition, it shows greatly enhanced luminous efficiency compared to a ternary blended white light-emitting-diode. (C) 2005 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2005-02
Language
ENG
Keywords

ELECTROLUMINESCENT DEVICES; ENERGY-TRANSFER; PHOSPHORESCENT; EMISSION; DIODES; ELECTROPHOSPHORESCENCE; IRIDIUM; LAYER

Citation

CHEMICAL PHYSICS LETTERS, v.403, no.4-6, pp.293 - 297

ISSN
0009-2614
DOI
10.1016/j.cplett.2004.12.119
URI
http://hdl.handle.net/10203/4435
Appears in Collection
CBE-Journal Papers(저널논문)
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