P-167: Effect of Energy Level of Hole-Blocking Layer on the Electroluminescence Characteristics of Highly Soluble Ir(III) Complex Based Phosphorescent Organic Light-Emitting Diodes

2009 ◽  
Vol 40 (1) ◽  
pp. 1740
Author(s):  
Young Wook Park ◽  
Young Min Kim ◽  
Jin Hwan Choi ◽  
Tae Hyun Park ◽  
Jin Wook Jung ◽  
...  
Keyword(s):  
Energy Level ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Blocking Layer ◽  
Light Emitting ◽  
Organic Light ◽  
Hole Blocking Layer

Efficiency Improvement of Organic Light Emitting Diodes with Co-Deposited Hole Blocking Layer

2010 ◽  
Vol 297-301 ◽  
pp. 561-566
Author(s):  
C.H. Liu ◽  
C.H. Tesng ◽  
C.P. Cheng
Keyword(s):  
White Light ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Blocking Layer ◽  
Efficiency Improvement ◽  
Mixing Rate ◽  
Light Emitting ◽  
Organic Light ◽  
Color Coordinate ◽  
Hole Blocking Layer

There are several kinds of methods in improving the efficiency of organic light emitting diodes (OLEDs). In this work, we used a co-deposited hole blocking layer to improve the efficiency of OLEDs. The structure of the component is: ITO/ MTDATA(15 nm) /NPB(40 nm) /BCP(10 nm) /BCP: Alq(15 nm) /LiF(0.7 nm)/ Al(180 nm). We changed the mixing rate of the BCP:Alq layer to be capable of hole blocking and electron transporting, and then improved the efficiency of OLEDs. Finally, we prepared white light OLED with doping Rubrene in NPB. When the concentration of the NPB: Rubrene layer was 2.0 wt.%, the device could emit the white light at 100 mA/cm2, and the luminance was above 2300 cd/m2, and the color coordinate was x = 0.36, y = 0.37.

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