Anthracene derivative and organic electroluminescence device employing the same

Abstract

An anthracene derivative with a specified asymmetrical type structure. An organic electroluminescence device which comprises at least one organic thin film layer including a light emitting layer sandwiched between a pair of electrode consisting of an anode and a cathode, wherein at least one of the organic thin film layer comprises the anthracene derivative. An organic electroluminescence device which emits blue light of enhanced purity and has a long lifetime is provided.

1 . An anthracene derivative represented by general formula (I): 
     
       
         
         
             
             
         
       
       wherein: 
       X represents a hydrogen atom, a substituted or unsubstituted aromatic group having 6 to 50 ring carbon atoms, a substituted or unsubstituted aromatic heterocyclic group having 5 to 50 ring atoms, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted cycloalkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms, a substituted or unsubstituted aralkyl group having 6 to 50 carbon atoms, a substituted or unsubstituted aryloxy group having 5 to 50 ring atoms, a substituted or unsubstituted arylthio group having 5 to 50 ring atoms, a substituted or unsubstituted alkoxycarbonyl group having 2 to 50 carbon atoms, a substituted or unsubstituted silyl group, a carboxyl group, a halogen atom, a cyano group, a nitro group or a hydroxyl group; 
       Ar 1  and Ar 2  each independently represents a substituted or unsubstituted condensed aromatic group having 10 to 50 ring carbon atoms; 
       at least one of Ar 1  or Ar 2  represents a 1-naphthyl group represented by general formula (II) or a 2-naphthyl group represented by general formula (III): 
     
     
       
         
         
             
             
         
       
       R 1  to R 7  each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms; at least one adjacent couple among R 1  to R 7  are equally alkyl groups bonding each other to form a ring structure; 
       X represents the same as the foregoing description; 
       d, e, f, g, h and i each independently represents an integer of 0 to 4; 
       a, b and c each independently represents an integer of 0 to 4; 
       n represents an integer of 1 to 3; and 
       when n is 2 or greater, within the brackets [ ], each 
     
     
       
         
         
             
             
         
       
     
     may be the same or different. 
   
   
       2 . The anthracene derivative according to  claim 1 , wherein one of Ar 1  and Ar 2  is a triptycenyl group represented by general formula (IV): 
     
       
         
         
             
             
         
       
     
   
   
       3 . The anthracene derivative according to  claim 1 , wherein at least one of Ar 1  and Ar 2  is a group selected from the group consisting of: 
     
       
         
         
             
             
         
       
       
         
         
             
             
         
       
     
   
   
       4 . An organic electroluminescence device, comprising at least one organic thin film layer, wherein:
 the at least one organic thin film layer comprises a light emitting layer sandwiched between a pair of electrodes consisting of an anode and a cathode; and   the at least one organic thin film layer comprises the anthracene derivative according to  claim 1 .   
   
   
       5 . The organic electroluminescence device according to  claim 4 , wherein the light emitting layer further comprises an arylamine compound. 
   
   
       6 . The organic electroluminescence device according to  claim 4 , wherein the light emitting layer further comprises a styrylamine compound. 
   
   
       7 . The organic electroluminescence device according to  claim 4 , wherein the device emits blue light. 
   
   
       8 . The organic electroluminescence device according to  claim 5 , wherein the device emits blue light. 
   
   
       9 . The organic electroluminescence device according to  claim 6 , wherein the device emits blue light.