Red and near infrared polarized light emissions from polyfluorene copolymer based light emitting diodes
- 12 March 2007
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 90 (11) , 113510
- https://doi.org/10.1063/1.2713139
Abstract
The authors report polarized red, electroluminescence peak at and near infrared, electroluminescence peak at , light emission from light emitting diodes based on two polyfluorene copolymers. The copolymers are synthesized from a fluorene monomer combined with donor-acceptor-donor comonomers and designed to have a low band gap and form birefringent liquid crystalline phases. Emission occurs from aligned thin films of polymer layers. The emissive layers are aligned by spin coating on a layer of rubbed conducting polymer poly(3,4-ethylene dioxythiophene)-poly(styrene sulphonate) and thermally converted into glassy nematic liquid crystalline state.
Keywords
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