Organic EL device and method for its manufacture

Abstract

An organic EL device comprising: 1) a laminate consisting of an opposed pair of electrodes and an organic light-emitting layer sandwiched between the electrode, 2) a gas-tight housing accommodating the laminate and shielding off the external atmosphere, and 3) a sheet-like preformed moisture-absorbing body which is stretched and fabricated outside the gas-tight housing in advance, disposed in isolation from the laminate within the gas-tight housing, the preformed moisture-absorbing body being fixedly secured to at least one part of the gas-tight housing, and the preformed moisture-absorbing body comprising a desiccant and a resin component.

What is claimed is:  
     
         1 . An organic EL device comprising: 
 1) a laminate consisting of an opposed pair of electrodes and an organic light-emitting layer sandwiched between the electrode,    2) a gas-tight housing accommodating said laminate and shielding off the external atmosphere, and    3) a sheet-like preformed moisture-absorbing body which is stretched and fabricated outside the gas-tight housing in advance, disposed in isolation from said laminate within said gas-tight housing, said preformed moisture-absorbing body being fixedly secured to at least one part of said gas-tight housing, and said preformed moisture-absorbing body comprising a desiccant and a resin component.    
     
     
         2 . The organic EL device according to  claim 1  wherein said moisture-absorbing body is a body obtained by forming a mixture consisting of a desiccant and a resin component.  
     
     
         3 . The organic EL device according to  claim 1  wherein the desiccant comprises at least one member selected from the group consisting of alkaline earth metal oxides and sulfate salts.  
     
     
         4 . The organic EL device according to  claim 1  wherein said resin component is at least one kind of gas-permeable resin.  
     
     
         5 . The organic EL device according to  claim 1  wherein said resin component is selected from the group consisting of polyolefins, polyacrylic acids or esters, polyacrylonitrile, polyamides, polyesters, epoxy resins and polycarbonates.  
     
     
         6 . The organic EL device according to  claim 1  wherein said resin component is selected from the group consisting of polyethylene, polypropylene, polybutadiene and polyisoprene.  
     
     
         7 . The organic EL device according to  claim 1  wherein the amount of said desiccant is about 30 to 85 weight % and that of said resin component is about 70 to 15 weight % based on 100 weight % of the desiccant and resin component combined.  
     
     
         8 . The organic EL device according to  claim 1  wherein the amount of said desiccant is about 40 to 80 weight % and that of said resin component is about 60 to 20 weight % based on 100 weight % of the desiccant and resin component combined.  
     
     
         9 . The organic EL device according to  claim 1  wherein the amount of said desiccant is about 50 to 70 weight % and that of said resin component is about 50 to 30 weight % based on 100 weight % of the desiccant and resin component combined.  
     
     
         10 . The organic EL device according to  claim 1  wherein said resin component is polyolefin.