Organic electroluminescent element material, organic electroluminescent element, display device and lighting device

Abstract

This invention provides an organic EL element, which can control luminescence wavelength, exhibits high luminescence efficiency, and has a prolonged emission life, and a lighting equipment and a display device. They can be realized by an organic electroluminescent element material characterized by a metal complex having a structure represented by the following general formula (A) as a partial structure.

1 . An organic electroluminescent element material comprising a metal complex having a partial structure represented by Formula (A): 
     
       
         
         
             
             
         
       
       wherein Xa, Xb, Xc, Xd, Xe, and Xf each represent a carbon atom, CRa, a nitrogen atom, NRb, an oxygen atom or a sulfur atom, provided that at least one of them represents CRa; Ya, Yb, and Yc each represent a carbon atom or a nitrogen atom and Yd represents a nitrogen atom; when Ya and Yb represent the same atom, Yc does not represent a nitrogen atom; Ra and Rb represent a hydrogen atom or a substituent, provided that one of Ra represents an aromatic hydrocarbon ring group or an aromatic heterocyclic ring group; Ma represents a metal of the 8th-10th groups in a periodic table of elements; and rings Z1 and Z2 each represent a single five-membered ring, and bonds to form each of the rings Z 1  and Z 2  each represent a single bond or a double bond, rings Z 1  and Z 2  each being a single ring. 
     
   
   
       2 . The organic electroluminescent element material of  claim 1  comprising a metal complex having a partial structure represented by Formula (1): 
     
       
         
         
             
             
         
       
       wherein X 01 , X 02 , X 03 , X 04 , X 05 , and X 06  each represent CR 01 , a nitrogen atom, NR 02 , an oxygen atom or a sulfur atom, provided that at least one of them represents CR 01 ; Y 01  and Y 02  each represent a carbon atom or a nitrogen atom; R 01  and R 02  each represent a hydrogen atom or a substituent, provided that at least one of R 01  represents an aromatic hydrocarbon ring group or an aromatic heterocyclic ring group; Mol represents a transition metal element of the 8th-10th groups in the periodic table of elements; rings A and B each represent a single five-membered ring, and bonds to form each of rings A and B represent a single bond or a double bond. 
     
   
   
       3 . The organic electroluminescent element material of  claim 1  comprising a metal complex having a partial structure represented by Formula (2): 
     
       
         
         
             
             
         
       
       wherein X 11 , X 12 , X 13 , X 14 , X 15 , and X 16  each represent CR 11 , a nitrogen atom, NR 12 , an oxygen atom or a sulfur atom, provided that at least one of them represents CR 11 ; R 11  and R 12  each represent a hydrogen atom or a substituent, provided that at least one of R 11  represents an aromatic hydrocarbon ring group or an aromatic heterocyclic ring group; M 11  represents a transition metal element of the 8th-10th groups in the periodic table of elements; rings C and D each represent a single five-membered ring, and bonds to form each of rings C and D each represent a single bond or a double bond. 
     
   
   
       4 . The organic electroluminescent element material of  claim 1  comprising a metal complex having a partial structure represented by Formula (3): 
     
       
         
         
             
             
         
       
       wherein X 21 , X 22 , X 23 , X 24 , X 25 , and X 26  each represent CR 21 , a nitrogen atom, NR 22 , an oxygen atom or a sulfur atom, provided that at least one of them represents CR 21 ; R 21  and R 22  each represent a hydrogen atom or a substituent, provided that at least one of R 21  represents an aromatic hydrocarbon ring group or an aromatic heterocyclic ring group; M 21  represents a transition metal element of the 8th-10th groups in the periodic table of elements; rings E and F each represent a single five-membered ring, and bonds to form each of rings E and F represent a single bond or a double bond. 
     
   
   
       5 . The organic electroluminescent element material of  claim 1  comprising a metal complex having a partial structure represented by Formula (4): 
     
       
         
         
             
             
         
       
       wherein X 31 , X 32 , X 33 , X 34 , X 35 , and X 36  each represent CR 31 , a nitrogen atom, NR 32 , an oxygen atom or a sulfur atom, provided that at least one of them represents CR 31 ; X 37  and X 38  each represent a carbon atom or a nitrogen atom; R 31  and R 32  each represent a hydrogen atom or a substituent, provided that at least one of R 31  represents an aromatic hydrocarbon ring group or an aromatic heterocyclic ring group; M 31  represents a transition metal element of the 8th-10th groups in the periodic table of elements; rings G and H each represent a single five-membered ring, and bonds to form each of rings G and H represent a single bond or a double bond. 
     
   
   
       6 . The organic electroluminescent element material of  claim 1 , wherein Ma in Formula (A) is iridium or platinum. 
   
   
       7 . The organic electroluminescent element material of  claim 2 , wherein M 01  in Formula (1) is iridium or platinum. 
   
   
       8 . The organic electroluminescent element material of  claim 3 , wherein M 11  in Formula (2) is iridium or platinum. 
   
   
       9 . The organic electroluminescent element material of  claim 4 , wherein M 21  in Formula (3) is iridium or platinum. 
   
   
       10 . The organic electroluminescent element material of  claim 5 , wherein M 31  in formula (4) is iridium or platinum. 
   
   
       11 . An organic electroluminescent element comprising the organic electroluminescent element materials of  claim 1 . 
   
   
       12 . An organic electroluminescent element comprising an emission layer as a constituting layer of the element, wherein the emission layer comprises the organic electroluminescent element materials of  claim 1 . 
   
   
       13 . An organic electroluminescent element comprising an electron inhibition layer as a constituting layer of the element, wherein the electron inhibition layer comprises the organic electroluminescent element materials of  claim 1 . 
   
   
       14 . The organic electroluminescent element of  claim 11 , comprising an emission layer as a constituting layer of the element, the emission layer containing:
 a carboline derivative; or   a condensed ring compound having a structure derived from carboline, wherein at least one of carbon atoms of a hydrocarbon ring in a carboline ring is substituted with a nitrogen atom.   
   
   
       15 . The organic electroluminescent element of  claim 11 , comprising a positive hole inhibition layer as a constituting layer of the element, the positive hole inhibition layer containing:
 a carboline derivative; or   a condensed ring compound having a structure derived from carboline, wherein at least one of carbon atoms of a hydrocarbon ring in a carboline ring is substituted with a nitrogen atom.   
   
   
       16 . A display device comprising the organic electroluminescent elements of  claim 11 . 
   
   
       17 . A lighting device comprising the organic electroluminescent elements of  claim 11 .