Organic light-emitting device using iptycene derivatives

Abstract

An organic light-emitting device (OLED) in which an iptycene derivative is used as the emissive layer and/or one or more of the charge transport layers, or as a host material for one or more of these layers.

What is claimed is:  
     
         1 . An organic light emitting device comprising: 
 an emissive layer sandwiched between at least a cathode and an anode, wherein the emissive layer includes an iptycene derivative expressed according to the following general formula (I):                          wherein any or all of R 1 -R 6  may be absent;    wherein any or all of R 1  and R 2 , R 3  and R 4 , and R 5  and R 6  may be taken together to form an aryl group; and    wherein any or all of R 1 -R 6  may represent a charge-transport substituent.    
     
     
         2 . The organic light emitting device according to  claim 1 , wherein any or all of R 1  and R 2 , R 3  and R 4 , and R 5  and R 6  are taken together to form an aryl group selected from the group consisting of  
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
       
     
     
         3 . The organic light emitting device according to  claim 1 , wherein any or all of R 1 -R 6  represents a charge-transport substituent selected from the group consisting of  
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
       
     
     
         4 . The organic light emitting device according to  claim 1 , wherein the iptycene derivative is selected from the group consisting of  
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
       
     
     
         5 . The organic light emitting device according to  claim 1 , wherein said emissive layer is comprised of a functional light-emitting layer of the iptycene derivative.  
     
     
         6 . The organic light emitting device according to  claim 1 , wherein said emissive layer is comprised of a host material of the iptycene derivative, together with a functional light-emitting dopant.  
     
     
         7 . An organic light emitting device comprising: 
 an emissive layer sandwiched between at least one charge transport layer and an anode and a cathode, wherein the charge transport layer includes an iptycene derivative according to the following general formula (I):                          wherein any or all of R 1 -R 6  may be absent;    wherein any or all of R 1  and R 2 , R 3  and R 4 , and R 5  and R 6  may be taken together to form an aryl group; and    wherein any or all of R 1 -R 6  may represent a charge-transport substituent.    
     
     
         8 . The organic light emitting device according to  claim 7 , wherein any or all of R 1  and R 2 , R 3  and R 4 , and R 5  and R 6  are taken together to form an aryl group selected from the group consisting of  
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
       
     
     
         9 . The organic light emitting device according to  claim 7 , wherein any or all of R 1 -R 6  represents a charge-transport substituent selected from the group consisting of  
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
       
     
     
         10 . The organic light emitting device according to  claim 7 , wherein the iptycene derivative is selected from the group consisting of  
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
       
     
     
         11 . The organic light emitting device according to  claim 7 , wherein said charge transport layer is comprised of a functional charge transport layer of the iptycene derivative.  
     
     
         12 . The organic light emitting device according to  claim 7 , wherein said charge transport layer is comprised of a host material of the iptycene derivative, together with a functional charge transport dopant.  
     
     
         13 . The organic light emitting device according to  claim 7 , wherein the charge transport layer is an electron transport layer.  
     
     
         14 . The organic light emitting device according to  claim 7 , wherein the charge transport layer is a hole transport layer.