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
VAT included - FREE Shipping
Do you like this product? Spread the word!
£69.99 incl. VAT
Only 1 items available Only 1 items available
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.
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.
Number of Pages:
LAP Lambert Academic Publishing
26 February 2010
0.22 x 0.15 x 0.017 m; 0.476 kg