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White polymer light-emitting devices from ternary-polymer blend with concentration gradient
- Source :
- Chemical Physics Letters. 403:293-297
- Publication Year :
- 2005
- Publisher :
- Elsevier BV, 2005.
-
Abstract
- 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 0 -dihexylfluorene-2,7-divinylene-m-phenylenevinylene-stat-p-phenylenevinylene) and poly(2-methoxy-5-(2 0 -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. � 2005 Elsevier B.V. All rights reserved.
- Subjects :
- chemistry.chemical_classification
Materials science
business.industry
Bilayer
General Physics and Astronomy
chemistry.chemical_element
Polymer
chemistry
Chemical engineering
Optoelectronics
Polymer blend
Iridium
Physical and Theoretical Chemistry
business
Ternary operation
Phosphorescence
Luminous efficacy
Layer (electronics)
Subjects
Details
- ISSN :
- 00092614
- Volume :
- 403
- Database :
- OpenAIRE
- Journal :
- Chemical Physics Letters
- Accession number :
- edsair.doi...........5c8f1b57ba519e799db1399e78a937c8