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Proceedings Paper

Liquid crystalline orientation of polyfluorenes for polarized electroluminescence devices
Author(s): Katharine S. Whitehead; Martin Grell; Donal D. C. Bradley; Markus Jandke; Peter Strohriegl
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Paper Abstract

Liquid crystalline conjugated polymers have potential applications as inexpensive, easy to process polarized back lights for liquid crystal displays. Two 'Hairy rod' type conjugated polymers have been investigated as polarized light emitting materials. In this paper, we present polarized absorption and photoluminescence for films aligned on rubbed precursor PPV alignment layers. We also report electroluminescence measurements for oriented multi-layer devices with rubbed PPV hole transporting alignment layers that produced polarization ratios of up to 25:1 and a luminance of 250 cd/m2. Sample preparation, device fabrication and characterization are described. Preliminary investigations have been made into the performance of PPV as an alignment layer with respect to thermal degradation.

Paper Details

Date Published: 19 May 2000
PDF: 9 pages
Proc. SPIE 3939, Organic Photonic Materials and Devices II, (19 May 2000); doi: 10.1117/12.386372
Show Author Affiliations
Katharine S. Whitehead, Univ. of Sheffield (United Kingdom)
Martin Grell, Univ. of Sheffield (United Kingdom)
Donal D. C. Bradley, Univ. of Sheffield (United Kingdom)
Markus Jandke, Univ. Bayreuth (Germany)
Peter Strohriegl, Univ. Bayreuth (Germany)


Published in SPIE Proceedings Vol. 3939:
Organic Photonic Materials and Devices II
Donal D. C. Bradley; Bernard Kippelen, Editor(s)

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