Composition for an organic el element and method of manufacturing the organic EL element

a technology of organic el and manufacturing method, which is applied in the direction of bridges, other domestic articles, bridge structural details, etc., can solve the problems of difficult to obtain homogeneous defect-free thin films by vapor deposition method, difficult to select raw materials, and inefficient vapor deposition method, etc., to achieve high precision patterning, simple method, and short time
US20050058770A1Inactive Publication Date: 2005-03-17SEIKO EPSON CORP
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
SEIKO EPSON CORP
Publication Date
2005-03-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

A composition for an organic EL element which can form a high precision pattern in a simple manner and in a short time and a method of manufacturing the organic EL element are disclosed. By using the composition, optimum film design and luminescence characteristic can be easily obtained, and an adjustment of a luminescence efficiency can also be easily performed. The composition for an organic EL element comprises a precursor of a conjugated organic polymer compound for forming at least one luminescent layer (106), (107), (108) having a certain color and at least one kind of fluorescent dye for changing the luminescence characteristic of the luminescent layer. The luminescent layer is made from a pattern formed by an ink-jet method. As for the precursor, a precursor of PPV, PPV derivative or the like is preferably used. Further, it is preferable that the composition for the organic EL element satisfies at least one of the conditions including a contact angle of 30 to 170 degrees with respect to a nozzle surface of a nozzle provided in a head of an ink-jet device used for the ink-jet method for discharging the composition, a viscosity of 1 to 20 cp and a surface tension of 20 to 70 dyne / cm.
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Description

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to a composition for an electroluminescent (EL) element, and more particularly, to a composition for an organic EL element, and a method of manufacturing the organic EL element.

[0003] 2. Description of the Background Art

[0004] An organic EL element has a constitution in which a cathode and an anode are connected to the opposite sides of a solid thin film containing a fluorescent organic compound. When a voltage is applied across the electrodes, electrons and holes are injected into the thin film, and they migrate according to the generated electric field and recombine with each other. At the time, excitons are produced by the energy liberated upon the recombination, and energy (in the form of fluorescence or phosphorescence) is emitted when the excitons are returned to the ground state thereof. This phenomenon is called electroluminescence.

[0005] The characteristic of an organic EL e...

Claims

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