US2001009690A1PendingUtilityA1

Organic electroluminescent device with enhanced performance

42
Priority: Dec 8, 1997Filed: Feb 14, 2000Published: Jul 26, 2001
Est. expiryDec 8, 2017(expired)· nominal 20-yr term from priority
Inventors:Vi-En ChoongJi-Hai XuFranky SoSong Q. Shi
H10K 50/171
42
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Claims

Abstract

An organic electroluminescent device with enhanced performance includes anode and cathode electrodes with organic material, single or multiple layers, positioned therebetween and in juxtaposition to each of the electrodes. The organic material is doped with an AMC dopant with a concentration in a range of approximately 0.1 Wt % to 15 Wt % in a region of the organic material adjacent to the cathode electrode. This doped region has a thickness in a range of approximately 20 Å to 600 Å. The dopant includes either a low work function alkaline metal compound, such as LiF, LiCl, KBr, MgF 2 , LiO 2 , MgO x , CaO x , and CsO x or a low work function alkaline metal alloy, such as Li-Al, Li-In, Sr-Al, Cs-Al.

Claims

exact text as granted — not AI-modified
What is claimed is:  
     
         1 . An organic electroluminescent device with enhanced performance comprising: 
 anode and cathode electrodes;    organic material positioned between the anode and cathode electrodes in juxtaposition to each of the electrodes, the organic material defining an electroluminescent region; and    AMC dopant in a region of the organic material adjacent the cathode electrode.    
     
     
         2 . An organic electroluminescent device as claimed in    claim 1    wherein the AMC dopant includes one of an alkaline metal compound or an alkaline metal alloy.  
     
     
         3 . An organic electroluminescent device as claimed in    claim 2    wherein each of the alkaline metal compound and the alkaline metal alloy have a low work function.  
     
     
         4 . An organic electroluminescent device as claimed in    claim 2    wherein the alkaline metal compound includes one of LiF, LiCl, KBr, MgF 2 , LiO 2 , MgO x , CaO x , and CsO x .  
     
     
         5 . An organic electroluminescent device as claimed in    claim 2    wherein the alkaline metal alloy includes one of Li-Al, Li-In, Sr-Al, and Cs-Al.  
     
     
         6 . An organic electroluminescent device as claimed in    claim 1    wherein the region of the organic material adjacent the cathode electrode having the AMC dopant has a thickness in a range of approximately 20 Å to 600 Å.  
     
     
         7 . An organic electroluminescent device as claimed in    claim 1    wherein the AMC dopant in the region of the organic material adjacent the cathode electrode has a concentration in a range of approximately 0.1 Wt % to 15 Wt %.  
     
     
         8 . An organic electroluminescent device with enhanced performance comprising: 
 anode and cathode electrodes;    organic material positioned between the anode and cathode electrodes in juxtaposition to each of the electrodes, the organic material defining an electroluminescent region; and    AMC dopant with a concentration in a range of approximately 0.1 Wt % to 15 Wt % in a region of the organic material having a thickness in a range of approximately 20 Å to 600 Å adjacent the cathode electrode.    
     
     
         9 . An organic electroluminescent device as claimed in    claim 8    wherein the AMC dopant includes one of an alkaline metal compound or an alkaline metal alloy.  
     
     
         10 . An organic electroluminescent device as claimed in    claim 9    wherein each of the alkaline metal compound and the alkaline metal alloy have a low work function.  
     
     
         11 . An organic electroluminescent device as claimed in    claim 9    wherein the alkaline metal compound includes one of LiF, LiCl, KBr, MgF 2 , LiO 2 , MgO x , CaO x , and CsO x .  
     
     
         12 . An organic electroluminescent device as claimed in    claim 9    wherein the alkaline metal alloy includes one of Li-Al, Li-In, Sr-Al, and Cs-Al.  
     
     
         13 . A method of fabricating an organic electroluminescent device with enhanced performance comprising in any order the steps of: 
 providing an anode and providing a cathode electrode;    positioning organic material between the anode and cathode electrodes in juxtaposition to each of the electrodes so as to define an electroluminescent region; and    doping a region of the organic material adjacent the cathode electrode with AMC dopant.    
     
     
         14 . A method of fabricating an organic electroluminescent device as claimed in    claim 13    wherein the step of positioning organic material includes evaporating the organic material on one of the anode and cathode electrodes.  
     
     
         15 . A method of fabricating an organic electroluminescent device as claimed in    claim 14    wherein the step of doping the region of the organic material adjacent the cathode electrode includes co-evaporating the organic material and the AMC dopant to form the region of the organic material adjacent the cathode electrode.  
     
     
         16 . A method of fabricating an organic electroluminescent device as claimed in    claim 13    wherein the step of doping a region of the organic material adjacent the cathode electrode includes using one of an alkaline metal compound or an alkaline metal alloy as the AMC dopant.  
     
     
         17 . A method of fabricating an organic electroluminescent device as claimed in    claim 16    wherein the step of doping a region of the organic material adjacent the cathode electrode includes using one of a low work function alkaline metal compound and a low work function alkaline metal alloy.  
     
     
         18 . A method of fabricating an organic electroluminescent device as claimed in    claim 16    wherein the step of doping a region of the organic material adjacent the cathode electrode includes using one of LiF, LiCl, KBr, MgF 2 , LiO 2 , MgO x , CaO x , and CsO x .  
     
     
         19 . A method of fabricating an organic electroluminescent device as claimed in    claim 16    wherein the step of doping a region of the organic material adjacent the cathode electrode includes using one of Li-Al, Li-In, Sr-Al, and Cs-Al.  
     
     
         20 . A method of fabricating an organic electroluminescent device as claimed in    claim 13    wherein the step of doping the region of the organic material adjacent the cathode electrode includes doping the region to a thickness in a range of approximately 20 Å to 600 Å.  
     
     
         21 . A method of fabricating an organic electroluminescent device as claimed in    claim 13    wherein the step of doping the region of the organic material adjacent the cathode electrode includes doping with a concentration in a range of approximately 0.1 Wt % to 15 Wt %.

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