Luminescent device with a triarylamine compound

Abstract

A luminescent device having a pair of electrodes and a luminescent layer disposed between the electrodes. The luminescent layer comprises a compound represented by the following general formula:

1 . A luminescent device comprising a pair of electrodes and a luminescent layer disposed therebetween, the luminescent layer comprising a compound represented by the following general formula (1):  
       
         
           
           
               
               
           
         
       
       wherein R 1  and R 2  are each independently a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, or a substituted or unsubstituted aryl group; Ar 1 , Ar 2 , Ar 3 , and Ar 4  are each a substituted or unsubstituted aryl or heterocyclic group, which may be the same or different from each other; both Ar 1  and Ar 3  are fused aromatic rings; at least one of R 1  and R 2  is a halogen, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted alkoxy group.  
     
     
         2 . The luminescent device according to  claim 1 , wherein at least one of Ar 1 , Ar 2 , Ar 3 , and Ar 4  is selected from the group consisting of a naphthyl group and an anthryl group.  
     
     
         3 . The luminescent device according to  claim 1 , wherein the thickness of the luminescent layer is less than 2 μm.  
     
     
         4 . The luminescent device according to  claim 3 , wherein the thickness of the luminescent layer is in a range of 0.05 to 0.5 μm.  
     
     
         5 . The luminescent device according to  claim 1 , wherein neither R 1  nor R 2  is a hydrogen.