Organic light - emitting diodes and methods for assembly and enhanced charge injection

Abstract

New organic light-emitting diodes and related electroluminescent devices and methods for fabrication, using siloxane self-assembly techniques.

1 . A method of using an amine molecular component to enhance hole injection across the electrode-organic interface of a light emitting diode device, said method comprising: 
 providing an anode; and    incorporating an electroluminescent medium adjacent said anode, said medium comprising an amine molecular layer, coupled to said anode, said molecular layer having at the least one of an arylamine molecular component and an arylalkylamine molecular component, each said component substituted with at least one silyl group, and on said molecular layer a hole transport layer of molecular components having said amine structure.    
     
     
         2 . The method of  claim 1  wherein said molecular layer components are selected from the group consisting of alkylsilyl-substituted compounds of  FIGS. 2A and 2C .  
     
     
         3 . The method of  claim 2  wherein said molecular layer components are selected from the group consisting of alkylsilyl-substituted TAA and alkylsilyl-substituted TPD.  
     
     
         4 . The method of  claim 3  wherein said molecular layer is spin-coated on said anode.  
     
     
         5 . The method of  claim 3  wherein said anode is immersed in a solution of said molecular layer components.  
     
     
         6 . The method of  claim 1  wherein a plurality of molecular layers are coupled to said anode.  
     
     
         7 . The method of  claim 1  wherein said hole transport layer is TPD.  
     
     
         8 . The method of  claim 7  wherein said hole transport layer is spin-coated on said anode.  
     
     
         9 . An electroluminescent device for generating light upon application of an electrical potential across two electrodes, said device comprising: 
 an anode;    at least one amine molecular layer, coupled to said anode, said molecular layer having at least one of an arylamine molecular component and an arylalkylamine molecular component, each said component substituted with at least one silyl group;    a conductive layer of molecular components having said amine structure; and    a cathode in electrical contact with said anode layer.    
     
     
         10 . The device of  claim 9  wherein said molecular layer components are selected from the group consisting of alkylsilyl-substituted compounds of  FIGS. 2A and 2C .  
     
     
         11 . The device of  claim 10  wherein said molecular layer components are selected from the group consisting of alkylsilyl-substituted TAA and alkylsilyl-substituted TPD.  
     
     
         12 . The device of  claim 11  wherein said conductive layer is a hole transport layer of TPD.  
     
     
         13 . The device of  claim 9  wherein a plurality of molecular layers are coupled to said anode.  
     
     
         14 . An electroluminescent device for generating light upon application of an electrical potential across two electrodes, said device comprising: 
 an anode;    at least one molecular layer, coupled to said anode, of arylamine molecular components substituted with at least two silyl groups;    a hole transport layer of TPD molecular components, said hole transport layer substantially without crystallization upon annealing; and    a cathode in electrical contact with said anode.    
     
     
         15 . The device of  claim 14  wherein said molecular layer components are selected from the group consisting of alkylsilyl-substituted TAA and alkylsilyl-substituted TPD.  
     
     
         16 . The device of  claim 14  wherein a plurality of molecular layers are coupled to said anode.  
     
     
         17 . The device of  claim 14  further including an electron transport layer.  
     
     
         18 . An electroluminescent device for generating light upon application of an electrical potential across two electrodes, said device comprising; 
 an anode;    at least one molecular layer, coupled to said anode, of alkylsilyl-substituted TPD molecular components;    a hole transport layer of TPD molecular components and    a cathode in electrical contact with said anode.    
     
     
         19 . The device of  claim 18  further including, an electron transport layer.  
     
     
         20 . The device of  claim 18  wherein a plurality of molecular layers are coupled to said anode.