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

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.

1 - 17 . (Cancelled)  
     
     
         18 . A method of manufacturing an organic EL element, comprising the steps of: 
 coating a pattern by discharging a composition for an organic EL element containing a precursor of a conjugated organic polymer compound from a head by an ink-jet method; and    forming at least one luminescent layer for a certain color by conjugating the precursor of the conjugated organic polymer compound.    
     
     
         19 . The method of manufacturing the organic EL element as claimed in  claim 18 , wherein the composition further comprises at least one kind of luminescent dye for changing a luminescence characteristic of the luminescent layer.  
     
     
         20 . The method of manufacturing the organic EL element as claimed in  claim 19 , wherein the luminescence characteristic is a maximum wavelength of light absorption.  
     
     
         21 . The method of manufacturing the organic EL element as claimed in  claim 18 , wherein the conjugated organic polymer compound is a hole injection and transfer type material.  
     
     
         22 . The method of manufacturing the organic EL element as claimed in  claim 18 , wherein the precursor of the conjugated organic polymer compound includes a precursor of a polyallylene vinylene.  
     
     
         23 . The method of manufacturing the organic EL element as claimed in  claim 22 , wherein the precursor of the polyallylene vinylene includes a precursor of a polyparaphenylene vinylene or a polyparaphenylene vinylene derivative.  
     
     
         24 . The method of manufacturing the organic EL element as claimed in  claim 19 , wherein the luminescence dye includes rhodamine or rhodamine derivative.  
     
     
         25 . The method of manufacturing the organic EL element as claimed in  claim 19 , wherein the luminescence dye includes distyrylbiphenyl or distyrylbiphenyl derivative.  
     
     
         26 . The method of manufacturing the organic EL element as claimed in  claim 19 , wherein the luminescence dye includes coumarin or coumarin derivative.  
     
     
         27 . The method of manufacturing the organic EL element as claimed in  claim 19 , wherein the luminescence dye includes tetraphenylbutadiene (TPB) or tetraphenylbutadiene derivative.  
     
     
         28 . The method of manufacturing the organic EL element as claimed in  claim 19 , wherein the luminescence dye includes quinacridone or quinacridone derivative.  
     
     
         29 . The method of manufacturing the organic EL element as claimed in  claim 18 , wherein a contact angle with respect to a material constituting a nozzle surface of a nozzle of a device used for the ink-jet method for discharging the composition lies in the range of 30 to 170 degrees.  
     
     
         30 . The method of manufacturing the organic EL element as claimed in  claim 18 , wherein a viscosity of the composition for the organic EL element is 1 to 20 cp.  
     
     
         31 . The method of manufacturing the organic EL element as claimed in  claim 18 , wherein a surface tension of the composition for the organic EL element is 20 to 70 dyne/cm.  
     
     
         32 . A method for manufacturing an organic EL element having a luminescent layer, the method comprising: 
 forming a pattern by discharging a composition from a nozzle, the composition including a polymer compound for forming the luminescent layer and at least one kind of dye for determining an emitted color of the luminescent layer, the at least one kind of dye having no substituent that is able to combine with the polymer compound.