Organic multicolor emission and display device and method for manufacturing same

Abstract

A transparent first substrate and a second substrate of an organic multicolor emission and display device are positioned opposite to each other with a predetermined clearance and sealed with a gap material that performs desiccating a surrounding atmosphere. The gap material advantageously has different void fractions between in an inner portion facing a sealed space within the device and in an outer portion facing an external atmosphere. Featuring the above structure, an organic multicolor emission and display device of color conversion system has been provided that maintains stable light emitting performance for a long period and exhibits excellent visibility angle characteristic.

1 . A method for manufacturing an organic multicolor emission and display device comprising steps of: 
 forming an organic light emitting element by laminating at least a first electrode, an organic light emitting layer, and a second electrode on a first substrate;    forming a color conversion filter layer on a transparent second substrate, the color conversion filter layer receiving electroluminescence from the organic light emitting layer and generating colored light; and    positioning the first substrate and the second substrate opposite to each other with a gap material, and sealing a space between the first substrate and the second substrate with the gap material;    wherein the gap material is placed along an outer peripheral region on an inner surface of the first substrate, the organic light emitting element being provided on the inner surface of the first substrate and the light emitting element being absent on the outer peripheral region of the first substrate; and the gap material is also placed along an outer peripheral region on an inner surface of the second substrate, the color conversion filter layer being provided on the inner surface of the second substrate, and the color conversion filter layer being absent on the outer peripheral region of the second substrate; the gap material performs function to desiccate surrounding atmosphere; and the gap material positions the first and the second substrates in such a way that the organic light emitting element is opposite to the color conversion filter layer with a predetermined clearance.    
   
   
       2 . The method for manufacturing an organic multicolor emission and display device according to  claim 1 , wherein the gap material placed along the outer peripheral region on the inner surfaces of the first substrate and the second substrate has different void fractions between in an inner portion of the gap material facing the sealed space between the first substrate and the second substrate and in an outer portion of the gap material facing external atmosphere.  
   
   
       3 . The method for manufacturing an organic multicolor emission and display device according to  claim 2 , wherein the gap material has a void fraction of not greater than 1% in the outer portion of the gap material and a void fraction from 50% to 90% in the inner portion of the gap material.  
   
   
       4 . The method for manufacturing an organic multicolor emission and display device according to  claim 3 , wherein the inner portion of the gap material, in which a void fraction is from 50% to 90%, occupies from 10% to 90% of total width of the gap material extending from innermost end to outermost end of the gap material.  
   
   
       5 . The method for manufacturing an organic multicolor emission and display device according to  claim 4 , wherein the inner portion of the gap material holds an oxide of an alkali metal or an oxide of an alkaline earth metal in voids within the gap material.  
   
   
       6 . The method for manufacturing an organic multicolor emission and display device according to  claim 1 , wherein the gap material is composed of an inorganic compound represented by metal oxides such as alumina and zirconia and metal nitrides such as silicon nitride and boron nitride.  
   
   
       7 . The method for manufacturing an organic multicolor emission and display device according to  claim 1 , wherein a sealing height dimension between the first substrate and the second substrate of the gap material is in a range of 1 μm to 100 μm.  
   
   
       8 . A method for manufacturing an organic multicolor emission and display device comprising steps of: 
 preparing a first substrate and a transparent second substrate;    forming a color conversion filter layer on the transparent second substrate;    forming a light emitting element comprising at least a first electrode, an organic light emitting layer, and a transparent second electrode on the color conversion filter layer in such a way that the transparent second electrode facing the color conversion filter layer;    positioning the first substrate and the second substrate opposite to each other with a gap material, and sealing a space between the first substrate and the second substrate with the gap material;    wherein the gap material is placed along an outer peripheral region on an inner surface of the second substrate, functional layers including the color conversion filter layer and the organic light emitting element being provided on the inner surface of the second substrate and the functional layers being absent on the outer peripheral region of the second substrate; and the gap material is placed also long an peripheral region on an inner surface of the first substrate, the peripheral region of the first substrate being opposite to the peripheral region of the second substrate; the gap material performs function to desiccate surrounding atmosphere; and the gap material positions the first and the second substrates in such a way that the organic light emitting element above the second substrate is opposite to the first substrate with a predetermined clearance.    
   
   
       9 . The method for manufacturing an organic multicolor emission and display device according to  claim 8 , wherein the gap material placed along the outer peripheral region on the inner surfaces of the first substrate and the second substrate has different void fractions between in an inner portion of the gap material facing the sealed space between the first substrate and the second substrate and in an outer portion of the gap material facing external atmosphere.  
   
   
       10 . The method for manufacturing an organic multicolor emission and display device according to  claim 9 , wherein the gap material has a void fraction of not greater than 1% in the outer portion of the gap material and a void fraction from 50% to 90% in the inner portion of the gap material.  
   
   
       11 . The method for manufacturing an organic multicolor emission and display device according to  claim 10 , wherein the inner portion of the gap material, in which a void fraction is from 50% to 90%, occupies from 10% to 90% of total width of the gap material extending from innermost end to outermost end of the gap material.  
   
   
       12 . The method for manufacturing an organic multicolor emission and display device according to  claim 10 , wherein the inner portion of the gap material holds an oxide of an alkali metal or an oxide of an alkaline earth metal in voids within the gap material.  
   
   
       13 . The method for manufacturing an organic multicolor emission and display device according to  claim 8 , wherein the gap material is composed of an inorganic compound represented by metal oxides such as alumina and zirconia and metal nitrides such as silicon nitride and boron nitride.  
   
   
       14 . The method for manufacturing an organic multicolor emission and display device according to  claim 8 , wherein a sealing height dimension between the first substrate and the second substrate of the gap material is in a range of 1 μm to 100 μm.  
   
   
       15 . The method for manufacturing an organic multicolor emission and display device according to  claim 8  further comprising a step of attaching a desiccant on the inner surface of the first substrate.  
   
   
       16 . The method for manufacturing an organic multicolor emission and display device according to  claim 9  further comprising a step of attaching a desiccant on the inner surface of the first substrate.  
   
   
       17 . The method for manufacturing an organic multicolor emission and display device according to  claim 10  further comprising a step of attaching a desiccant on the inner surface of the first substrate.  
   
   
       18 . The method for manufacturing an organic multicolor emission and display device according to  claim 11  further comprising a step of attaching a desiccant on the inner surface of the first substrate.  
   
   
       19 . The method for manufacturing an organic multicolor emission and display device according to  claim 12  further comprising a step of attaching a desiccant on the inner surface of the first substrate.  
   
   
       20 . The method for manufacturing an organic multicolor emission and display device according to  claim 13  further comprising a step of attaching a desiccant on the inner surface of the first substrate.  
   
   
       21 . The method for manufacturing an organic multicolor emission and display device according to  claim 14  further comprising a step of attaching a desiccant on the inner surface of the first substrate.