Organic electroluminescent device

Abstract

An organic electroluminescent device including an organic green emission layer comprising a green emission material and a blue emission material. The green emission layer is interposed between a pair of electrodes.

1 . An organic electroluminescent device, comprising a green emission layer, comprising:
 a green emission material; and   a blue emission material,   wherein the green emission layer is interposed between a pair of electrodes, and   wherein the blue emission material is selected from compounds represented by the following molecular structures:   
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
       
     
     
         2 . The organic electroluminescent device of  claim 1 ,
 wherein a concentration of the blue emission material is in a range of 80 to 120 parts by weight based on 100 parts by weight of the green emission material.   
     
     
         3 . The organic electroluminescent device of  claim 1 ,
 wherein the blue emission material has a maximum absorption wavelength of about 420 nm to 480 nm.   
     
     
         4 . The organic electroluminescent device of  claim 1 ,
 wherein the green emission material comprises a compound selected from the group consisting of Tb(acac) 3 , Coumarin 6, NSD, Coronene, OXD-2, OXD-3, Alq3, and a mixture of Coumarin 6 and Alq3, which are represented by the following molecular structures:   
       
         
           
           
               
               
           
         
       
     
     
         5 . The organic electroluminescent device of  claim 1 ,
 wherein the emission layer is about 300 Å to 500 Å thick.   
     
     
         6 . The organic electroluminescent device of  claim 1 , wherein the green emission layer further comprises:
 a dopant selected from a group consisting of C314S, C343S, C7, C7S, C6, C6S, C314T, and C545T, which are represented by the following molecular structures:   
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
       
     
     
         7 . The organic electroluminescent device of  claim 6 ,
 wherein a concentration of the dopant is in the range of 0.2 to 3 parts by weight based on 100 parts of the total weight of the green emission material and the blue emission material.   
     
     
         8 . The organic electroluminescent device of  claim 1 , further comprising at least a layer selected from the group consisting of:
 a hole injection layer;   a hole transport layer;   an electron injection layer;   an electron transport layer; and   a hole blocking layer.   
     
     
         9 . An organic electroluminescent device, comprising:
 a first electrode;   a hole transport layer formed on the first electrode;   a green emission layer comprising a green emission material and a blue emission material and formed on the hole transport layer;   an electron transport layer formed on the green emission layer; and   a second electrode formed on the electron transport layer,   wherein the blue emission material is selected from compounds represented by the following molecular structures:   
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
       
     
     
         10 . The organic electroluminescent device of  claim 9 ,
 wherein a concentration of the blue emission material is in a range of 80 to 120 parts by weight based on 100 parts by weight of the green emission material.   
     
     
         11 . The organic electroluminescent device of  claim 9 ,
 wherein the green emission material comprises a compound selected from the group consisting of Tb(acac) 3 , Coumarin6, NSD, Coronene, OXD-2, and OXD-3, which are represented by the following molecular structures:   
       
         
           
           
               
               
           
         
       
     
     
         12 . The organic electroluminescent device of  claim 9 , wherein the green emission layer further comprises:
 a dopant selected from the group consisting of C314S, C343S, C7, C7S, C6, C6S, and C314T, which are represented by the following formulas:   
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
       
     
     
         13 . The organic electroluminescent device of  claim 12 ,
 wherein a concentration of the dopant is in a range of 0.2 to 3 parts by weight based on 100 parts of the total weight of the green emission material and the blue emission material.   
     
     
         14 . The organic electroluminescent device of  claim 13 ,
 wherein the green emission layer further comprises a dopant selected from Coumarin 6 and C545.   
     
     
         15 . The organic electroluminescent device of  claim 9 , further comprising:
 a hole injection layer formed between the first electrode and the hole transport layer.   
     
     
         16 . The organic electroluminescent device of  claim 9 , further comprising:
 an electron injection layer formed between the electron transport layer and the second electrode.