Light-emitting polymer composition and organic EL display device using the same
a technology of light-emitting polymer composition and display device, which is applied in the direction of discharge tube luminescnet screen, natural mineral layered products, etc., can solve the problems of low light-emitting efficiency and short life span of the display device, polymer film shows a bad transfer characteristic, and the light-emitting layer of one color made of high-molecular organic materials is lower in light-emitting efficiency and shorter life span than that of low-molecular organi
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[0061] The two kinds of light-emitting polymers and the additive are mixed in an appropriate mass ratio and dissolved in a single solvent to prepare the light-emitting polymer composition. One light-emitting polymer is a PPV-based yellow electrolight-emitting polymer available under the trade name “SUPER YELLOW” from Covion Organic Semiconductors GmbH. The other light-emitting polymer is a PFO-based red electrolight-emitting polymer available under the trade name “RED-B” from Dow Chemical Company. The additive is a polystyrene having a molecular weight of 2,500 available from Sigma-Aldrich Corporation.
[0062] The light-emitting polymer composition is sufficiently stirred at a temperature of 60° C. for at least three hours. The light-emitting polymer composition is deposited on a transfer substrate to a thickness 80 nm to thereby form a transfer film. A substrate having an anode electrode pattern is cleaned and then UV / ozone-treated. A hole transporting layer made of a “PEDOT / PSS” fr...
example 2
[0071] The light-emitting polymer is a red electrolight-emitting polymer available under the trade name “AEF 2009 & 2045” from Covion Organic Semiconductors GmbH. The additive is a polystyrene available from Sigma-Aldrich Corporation. The molecular weight of the polystyrene is in a range between 2,000 and 2,500. The closer the molecular weight of the polystyrene is to 2,000, better the edge roughness of the light-emitting layer.
[0072] The light-emitting polymer and the additive are mixed in an appropriate mixing mass ratio and dissolved in a toluene to prepare the light-emitting polymer composition.
[0073] The light-emitting polymer composition is sufficiently stirred at a temperature of 60° C. for at least three hours. The light-emitting polymer composition is deposited on a transfer substrate to a thickness 80 nm to thereby form a transfer film. A substrate having an anode is cleaned and then UV / ozone-treated for fifteen minutes. A hole transporting layer made of “PEDOT / PSS” from...
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