Organic light-emitting device

Abstract

Disclosed is an organic light-emitting device (OLED), wherein a lower electrode, an organic emitting unit, an upper electrode, and a light enhance layer are subsequently formed between a bottom substrate and a top substrate. The light enhance layer has higher refractive index, between 2 and 3, than that of the top substrates, thereby efficiently improving the luminance intensity of the OLED.

What is claimed is: 
     
         1 . An organic light-emitting device, comprising:
 a bottom substrate;   a bottom electrode on the bottom substrate;   an organic light-emitting unit on the bottom electrode;   a top electrode on the organic light-emitting unit;   a light enhance layer on the top electrode; and   a top substrate on the light enhance layer,   wherein the light enhance layer has a higher refractive index than the top substrate, and   the light enhance layer has a refractive index of 2 to 3,   wherein the light enhance layer comprises silicon oxide, silicon nitride, silicon oxynitride, or aluminum oxide.   
     
     
         2 . An organic light-emitting device, comprising:
 a bottom substrate;   a bottom electrode on the bottom substrate;   an organic light-emitting unit on the bottom electrode;   a top electrode on the organic light-emitting unit;   a light enhance layer on the top electrode; and   a top substrate on the light enhance layer,   wherein the light enhance layer has a higher refractive index than the top substrate, and   the light enhance layer has a refractive index of 2 to 3,   wherein the organic light-emitting unit emits a blue light having a wave length of 450 nm to 480 nm, and the light enhance layer has a thickness defined as below:
     T =(55−20×( n− 2.1))+(110−50×( n− 2.1)) m;  
 
   wherein T is the thickness (nm) of the light enhance layer;
 n is the refractive index of the light enhance layer; and 
 0<m≦100. 
   
     
     
         3 . An organic light-emitting device, comprising:
 a bottom substrate;   a bottom electrode on the bottom substrate;   an organic light-emitting unit on the bottom electrode;   a top electrode on the organic light-emitting unit;   a light enhance layer on the top electrode; and   a top substrate on the light enhance layer,   wherein the light enhance layer has a higher refractive index than the top substrate, and   the light enhance layer has a refractive index of 2 to 3,   wherein the organic light-emitting unit emits a green light having a wave length of 510 nm to 540 nm, and the light enhance layer has a thickness defined as below:
     T =(65−20( n− 2.1))+(125−50×( n− 2.1))× m;  
 
   wherein T is the thickness (nm) of the light enhance layer;
 n is the refractive index of the light enhance layer; and 
 0<m≦100. 
   
     
     
         4 . An organic light-emitting device, comprising:
 a bottom substrate;   a bottom electrode on the bottom substrate;   an organic light-emitting unit on the bottom electrode;   a top electrode on the organic light-emitting unit;   a light enhance layer on the top electrode; and   a top substrate on the light enhance layer,   wherein the light enhance layer has a higher refractive index than the top substrate, and   the light enhance layer has a refractive index of 2 to 3,   wherein the organic light-emitting unit emits a red light having a wave length of 590 nm to 630 nm, and the light enhance layer has a thickness defined as below:
     T =(25−20×( n− 2.1))+(100+60×( n− 2.1))× m;  
 
   wherein T is the thickness (nm) of the light enhance layer;
 n is the refractive index of the light enhance layer; and 
 0<m≦100.