Electroluminescent material, electroluminescent element and color conversion filter

Abstract

An electroluminescent element with an electroluminescent material and a fluorescent substance. The fluorescent substance emits light having an emission maximum at a wavelength different from that of light emitted from the electroluminescent material upon absorption of the light emitted from the electroluminescent material. A color conversion filter is also disclosed. The color conversion filter has a fluorescent substance emitting light having an emission maximum at the wavelengths of 400 to 700 nm upon absorption of the light emitted from the electroluminescent material.

What is claimed is:  
     
         1 . An electroluminescent material represented by the following Formula D1:  
       
         
           
           
               
               
           
         
         wherein Ar 61  and Ar 62  are each an aryl group or an aromatic heterocyclic group; R 61  and R 62  are each a hydrogen atom or a substituent, provided that at least one of Ar 61 , Ar 62 , R 61  and R 62  is a biaryl group having a bond capable of giving an internal rotational isomerism or a group making the biaryl group, provided that adjacent substituent groups existing in the molecule represented by formula D1 may be condensed with each other to form a ring.  
       
     
     
         2 . An electroluminescence element comprising an electroluminescent material and an inorganic fluorescent substance capable of emitting light having a wavelength of a maximum emission different from that of light emitted from the electroluminescent material upon absorption of the light emitted from the electroluminescent material, and the electroluminescent material is a compound represented by the following Formula D1: 
 Formula D1                         wherein Ar 61  and Ar 62  are each an aryl group or an aromatic heterocyclic group; R 61  and R 62  are each a hydrogen atom or a substituent, provided that at least one of Ar 61 , Ar 62 , R 61  and R 62  is a biaryl group having a bond capable of giving an internal rotational isomerism or a group making the biaryl group, provided that adjacent substituent groups existing in the molecule represented by formula D1 may be condensed with each other to form a ring.    
     
     
         3 . The electroluminescent element of  claim 2 , wherein said inorganic fluorescent substance is an inorganic fluorescent substance prepared by a Sol-Gel method.  
     
     
         4 . The electroluminescent element of  claim 2 , wherein the wavelength of a maximum emission of the light emitted from said inorganic fluorescent substance is within a range of from 400 nm to 700 nm.  
     
     
         5 . The electroluminescent element of  claim 2 , wherein the wavelength of a maximum emission of the light emitted from said inorganic fluorescent substance is within a range of from 600 nm to 700 nm.  
     
     
         6 . The electroluminescent element of  claim 2 , wherein the wavelength of a maximum emission of the light emitted from the electroluminescent material is not more than 430 nm.  
     
     
         7 . The electroluminescent element of  claim 2 , wherein the wavelength of a maximum emission of light emitted from the electroluminescent material is within a range of from 400 to 430 nm.  
     
     
         8 . An electroluminescent element which comprises an electroluminescent material and a rare earth metal complex capable of emitting light having a wavelength of maximum emission different from that of light emitted from the electroluminescent material upon absorption of the light emitted from the electroluminescent material and the electroluminescent material is a compound represented by the following Formula D1:  
       
         
           
           
               
               
           
         
       
       wherein Ar 61  and Ar 62  are each an aryl group or an aromatic heterocyclic group; R 61  and R 62  are each a hydrogen atom or a substituent, provided that at least one of Ar 61 , Ar 62 , R 61  and R 62  is a biaryl group having a bond capable of giving an internal rotational isomerism or a group making the biaryl group, provided that adjacent substituent groups existing in the molecule represented by formula D1 may be condensed with each other to form a ring.  
     
     
         9 . The electroluminescent element of  claim 8 , wherein the wavelength of a maximum emission of the light emitted from the rare earth metal complex is within a range of from 400 nm to 700 nm.  
     
     
         10 . The electroluminescent element of  claim 8 , wherein the wavelength of a maximum emission of the light emitted from the rare earth metal complex is within a range of from 600 nm to 700 nm.  
     
     
         11 . The electroluminescent element of  claim 8 , wherein the wavelength of a maximum emission of the light emitted from the electroluminescent material is not more than 430 nm.  
     
     
         12 . The electroluminescent element of  claim 8 , wherein the wavelength of a maximum emission of light emitted from the electroluminescent material is within a range of from 400 nm to 430 nm.  
     
     
         13 . An electroluminescent element comprising an anode and a cathode and a compound represented by the following Formula D1:  
       
         
           
           
               
               
           
         
       
       wherein Ar 61  and Ar 62  are each an aryl group or an aromatic heterocyclic group; R 61  and R 62  are each a hydrogen atom or a substituent, provided that at least one of Ar 61 , Ar 62 , R 61  and R 62  is a biaryl group having a bond capable of giving an internal rotational isomerism or a group making the biaryl group, provided that adjacent substituent groups existing in the molecule represented by formula D1 may be condensed with each other to form a ring.