Organic electroluminescent device

Abstract

An organic electroluminescent device of the type comprises an organic layer 5, 5 a or 5 b having a luminescent region and provided between an anode 2 and a cathode 3 . The organic layer contains a distyryl compound represented by the following general formula (1). Chemical Formula 1 wherein R 1 , R 2 , R 3 and R 4 are, respectively, groups which may be the same or different and independently represent an aryl group of the following general formula (2). in which R 9 , R 10 , R 11 , R 12 and R 13 may be the same or different and, respectively, represent a hydrogen atom provided that at least one of them is a saturated or unsaturated alkoxyl group or an alkyl group, and R 5 , R 6 , R 7 and R 8 may be the same or different and, respectively, represent a hydrogen atom provided that at least one of them represents a cyano group, a nitro group or a halogen atom.

What is claimed is:  
     
         1 . An organic electroluminescent device of the type which comprises an organic layer having a luminescent region and provided between an anode and a cathode, wherein said organic layer comprises, as an organic luminescent material, a distyryl compound of the following general formula (1).  
       
         
           
           
               
               
           
         
       
       wherein R 1 , R 2 , R 3  and R 4  are, respectively, groups which may be the same or different and independently represent an aryl group of the following general formula (2)  
       
         
           
           
               
               
           
         
       
       in which R 9 , R 10 , R 11 , R 12  and R 13  may be the same or different group and, respectively, represent a hydrogen atom provided that at least one of them is a saturated or unsaturated alkoxyl group or an alkyl group, and R 5 , R 6 , R 7  and R 8  may be the same or different group and, respectively, represent a hydrogen atom provided that at least one of them represents a cyano group, a nitro group or a halogen atom.  
     
     
         2 . An organic electroluminescent device according to    claim 1   , wherein said organic layer has an organic built-up structure wherein a hole transport layer and an electron transport layer are built up, and said distyryl compound is used as a material for forming said hole transport layer.  
     
     
         3 . An organic electroluminescent device according to    claim 1   , wherein said organic layer has an organic built-up structure wherein a hole transport layer and an electron transport layer are successively built up, and said distyryl compound is used as a material for forming said electron transport layer.  
     
     
         4 . An organic electroluminescent device according to    claim 1   , wherein said organic layer has an organic built-up structure wherein a hole transport layer, a luminescent layer, and an electron transport layer are built up, and said distyryl compound is used as a material for forming said luminescent layer.  
     
     
         5 . An organic electroluminescent device of the type which comprises an organic layer having a luminescent region and provided between an anode and a cathode, wherein said organic layer comprises, as an organic luminescent material, at least one of distyryl compounds represented by the following structural formulae (3)-1, (3)-2, (3)-3, (3)-4, (3)-5, (3)-6 and (3)-7.  
       
         
           
           
               
               
           
         
       
     
     
         6 . An organic electroluminescent device according to    claim 5   , wherein said organic layer has an organic built-up structure wherein a hole transport layer and an electron transport layer are built up, and said distyryl compound is used as a material for forming said hole transport layer.  
     
     
         7 . An organic electroluminescent device according to    claim 5   , wherein said organic layer has an organic built-up structure wherein a hole transport layer and an electron transport layer are successively built up, and said distyryl compound is used as a material for forming said electron transport layer.  
     
     
         8 . An organic electroluminescent device according to    claim 5   , wherein said organic layer has an organic built-up structure wherein a hole transport layer, a luminescent layer, and an electron transport layer are built up, and said distyryl compound is used as a material for forming said luminescent layer.