Organic electroluminescent materials and devices

Abstract

A luminescent materials including donor-acceptor compounds with a nitrogen containing donor connected to the 1-position of a carbazole and triazene acceptor connected at the 9-position is disclosed.

What is claimed is: 
     
         1 . A compound having a structure according to Formula 1: 
       
         
           
           
               
               
           
         
         wherein R a  to R g , R 1  and R 2  are independently selected from the group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acids, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof; and 
         wherein Ar 1  to Ar 3  are independently substituted or unsubstituted aryl or heteroaryl and can connect to one another to form fused ring(s) and, 
         wherein L is a direct bond or a linker. 
       
     
     
         2 . The compound of  claim 1 , wherein R a  to R g  are H. 
     
     
         3 . The compound of  claim 1 , wherein Ar 1  is 
       
         
           
           
               
               
           
         
       
     
     
         4 . The compound of  claim 3 , wherein Ar 2  and Ar 3  are phenyl. 
     
     
         5 . The compound of  claim 4 , wherein L is a direct bond. 
     
     
         6 . The compound of  claim 1 , wherein Ar 1  and L are 
       
         
           
           
               
               
           
         
       
       and Ar 2  and Ar 3  are phenyl. 
     
     
         7 . The compound of  claim 1 , wherein said compound is selected from the group consisting of 
       
         
           
           
               
               
           
         
       
     
     
         8 . The compound of  claim 1 , wherein Ar 1  and Ar 2  are connected to form a carbazole moiety. 
     
     
         9 . The compound of  claim 8 , wherein said compound is selected from the group consisting of 
       
         
           
           
               
               
           
         
       
     
     
         10 . The compound of  claim 1 , wherein Ar 2  and Ar 3  are connected to form a carbazole moiety. 
     
     
         11 . The compound of  claim 10 , wherein said compound is selected from the group consisting of 
       
         
           
           
               
               
           
         
       
     
     
         12 . The compound of  claim 1 , wherein said compound is selected from the group consisting of 
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
       
     
     
         13 . A first device comprising a first organic light emitting device, the first organic light emitting device comprising:
 an anode;   a cathode; and   an emissive layer, disposed between the anode and the cathode, wherein the emissive layer comprises a first emitting compound having a structure according to Formula 1:   
       
         
           
           
               
               
           
         
         wherein R a  to R g , R 1  and R 2  are independently selected from the group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acids, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof; and 
         wherein Ar 1  to Ar 3  are independently substituted or unsubstituted aryl or heteroaryl and can connect to one another to form fused ring(s) and, 
         wherein L is a direct bond or a linker. 
       
     
     
         14 . The first device of  claim 13 , wherein the first emitting compound is selected from the group consisting of 
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
       
     
     
         15 . The first device of  claim 13 , wherein the first device emits a luminescent radiation at room temperature when a voltage is applied across the organic light emitting device;
 wherein the luminescent radiation comprises a delayed fluorescence process.   
     
     
         16 . The first device of  claim 13 , wherein the emissive layer further comprises a first phosphorescent emitting material. 
     
     
         17 . The first device of  claim 16 , wherein the emissive layer further comprises a second phosphorescent emitting material. 
     
     
         18 . The first device of  claim 13 , wherein the emissive layer further comprises a host material. 
     
     
         19 . The first device of  claim 16 , wherein the first device emits a white light at room temperature when a voltage is applied across the organic light emitting device. 
     
     
         20 . A formulation comprising a compound having a structure according to Formula 1: 
       
         
           
           
               
               
           
         
         wherein R a  to R g , R 1  and R 2  are independently selected from the group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acids, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof; and 
         wherein Ar 1  to Ar 3  are independently substituted or unsubstituted aryl or heteroaryl and can connect to one another to form fused ring(s) and, 
         wherein L is a direct bond or a linker.