Organic light emitting device

Abstract

An organic light emitting device having a high light emitting efficiency and a long light emission lifetime is provided that comprises a pair of electrodes provided on a substrate, and a light emitting layer comprising at least one layer of an organic substance provided between the electrodes, wherein the light emitting layer comprises a first organic substance and a second organic substance mainly concerning a light emission wavelength of the light emitting layer, and wherein the first organic substance comprises a fluorine-containing organic compound.

1 . An organic light emitting device comprising a pair of electrodes provided on a substrate, and a light emitting layer comprising at least one layer of an organic substance and provided between the electrodes, wherein the light emitting layer comprises a first organic substance and a second organic substance that mainly concerns a light emission wavelength of the light emitting layer, and wherein the first organic substance comprises a fluorine-containing organic compound.  
     
     
         2 . The organic light emitting device according to  claim 1 , wherein the fluorine-containing organic compound contains a single fluorine atom in a molecule or repeating unit thereof.  
     
     
         3 . The organic light emitting device according to  claim 2 , wherein the second organic substance comprises a phosphorescent organic compound.  
     
     
         4 . The organic light emitting device according to  claim 3 , wherein the fluorine-containing organic compound contains a single fluorine atom in a molecule or repeating unit thereof.  
     
     
         5 . The organic light emitting device according to  claim 1 , wherein the content of fluorine in the first organic substance is 1% by weight or more.  
     
     
         6 . The organic light emitting device according to  claim 3 , wherein the content of fluorine in the first organic substance is 1% by weight or more.  
     
     
         7 . The organic light emitting device according to  claim 1 , wherein the second organic substance contains fluorine.  
     
     
         8 . The organic light emitting device according to  claim 7 , wherein each of the first and the second organic substance is composed of plural kinds of organic compounds, and all the organic compounds contain at least one fluorine atom in a molecule or repeating unit thereof.  
     
     
         9 . The organic light emitting device according to  claim 8 , wherein all of the organic compounds contain a single fluorine atom in a molecule or repeating unit thereof.  
     
     
         10 . The organic light emitting device according to  claim 7 , wherein the second organic substance contains a phosphorescent organic compound.  
     
     
         11 . The organic light emitting device according to  claim 8 , wherein the second organic substance contains a phosphorescent organic compound.  
     
     
         12 . The organic light emitting device according to  claim 7 , wherein the content of fluorine in each of the first and the second organic substances is 1% by weight or more.  
     
     
         13 . The organic light emitting device according to  claim 12 , wherein the second organic substance contains a phosphorescent organic compound.  
     
     
         14 . The organic light emitting device according to  claim 1 , wherein the second organic substance contains a phosphorescent organic compound, and the phosphorescent organic compound contains a metal element selected from the group consisting of Cu, Re, Rh, Pt, Ru, Tm, Ir, and Au, and fluorine.  
     
     
         15 . The organic light emitting device according to  claim 1 , wherein the second organic substance contains a phosphorescent organic compound, and the phosphorescent organic compound contains iridium and fluorine.  
     
     
         16 . The organic light emitting device according to  claim 1 , wherein the first organic substance contains a compound having any one of the structures shown in the general formulas (1) below, and the second organic substance contains a compound having any one of the structures shown in the general formulas (2) below.  
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
       
     
     
         17 . The organic light emitting device according to  claim 1 , further comprising another organic substance layer between the electrodes, and all the organic substance layers contain fluorine.