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Liquid Crystalline Networks for Electroluminescent Displays - Ease of deposition of small molecules with the stability of polymers allows multi-layer photopatterned EL devices

by Contoret, Adam
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Contoret, Adam Liquid Crystalline Networks for Electroluminescent Displays - Ease of deposition of small molecules with the stability of polymers allows multi-layer photopatterned EL devices
Contoret, Adam - Liquid Crystalline Networks for Electroluminescent Displays - Ease of deposition of small molecules with the stability of polymers allows multi-layer photopatterned EL devices

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Description

This work presents the first low molar mass organic electroluminescent (EL) material to form a nematic glass and then emit plane-polarised light from the vitrified state on application of an electric field. Photocrosslinkable molecules are also discussed which form insoluble films on illumination with ultra- violet light. This approach combines the ease of deposition of small molecules with the robustness and stability of polymers, allowing simple fabrication of multi-layer EL devices and photopatterning. A range of conjugated low molar- mass molecules are considered, containing the anthracene, perylene and fluorene cores. An acrylate and several diene photopolymerisable derivatives of the fluorenes undergo photocrosslinking. A diene shows no significant degradation for an optimal exposure and a doped photo-alignment layer is used for the first time to obtain polarised EL with ratio 11:1 and a brightness of 80 cdm-2 from the crosslinked diene. The insoluble crosslinked network allows the spin-coating deposition of an electrontransporting over-layer, resulting in increased brightness.

Contributors

Author:
Contoret, Adam

Further information

Biography Artist:
My work with OLEDs started in 1997 with The University of Hull where i undertook a PhD. OLED technology at Hull has developed rapidly over the years resulting in numerous applications. The improved efficiency and simplicity of manufacture of Polar LEDS at Hull is cost attractive and offers reduced carbon footprint for manufacture.
Language:
Englisch
Number of Pages:
288
Media Type:
Taschenbuch
Publisher:
LAP Lambert Academic Publishing

Master Data

Product Type:
Paperback book
Release date:
26 February 2010
Package Dimensions:
0.22 x 0.15 x 0.017 m; 0.476 kg
GTIN:
09783838334745
DUIN:
FRGHQLVJCKG
£69.99
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