11.4: Coupling Efficiency Enhancement of Organic Light Emitting Devices with Refractive Microlens Array on High Index Glass Substrate

2004 ◽  
Vol 35 (1) ◽  
pp. 158 ◽  
Author(s):  
H. J. Peng ◽  
Y. L. Ho ◽  
C. F. Qiu ◽  
M. Wong ◽  
H. S. Kwok
Keyword(s):  
Glass Substrate ◽  
Coupling Efficiency ◽  
Microlens Array ◽  
High Index ◽  
Efficiency Enhancement ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Organic Light Emitting Devices

scholarly journals Partitioning pixel of organic light-emitting devices with center-hollowed microlens-array films for efficiency enhancement

2010 ◽  
Vol 18 (18) ◽  
pp. 18685 ◽  
Author(s):  
Kuan-Yu Chen ◽  
Yu-Ting Hsiao ◽  
Hoang Yan Lin ◽  
Mao-Kuo Wei ◽  
Jiun-Haw Lee
Keyword(s):  
Microlens Array ◽  
Efficiency Enhancement ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Organic Light Emitting Devices

Efficiency Enhancement of Tandem Organic Light-Emitting Devices Fabricated Utilizing an 1,4,5,8,9,11-Hexaazatriphenylene-Hexacarbonitrile Charge-Generation Layer

2015 ◽  
Vol 15 (10) ◽  
pp. 7717-7721
Author(s):  
Young Pyo Jeon ◽  
Tae Whan Kim
Keyword(s):  
Current Density ◽  
Efficiency Enhancement ◽  
Charge Generation ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Maximum Current ◽  
Organic Light Emitting Devices ◽  
Generation Mechanisms ◽  
A Charge

The electrical and the optical properties of tandem organic light-emitting devices (OLEDs) with stacked electroluminescence units were investigated to clarify the charge-generation mechanisms due to the existence of a charge-generation layer (CGL). The current density of the current limited devices with an 1,4,5,8,9,11-hexaazatriphenylene-hexacarbonitrile (HAT-CN) CGL was 35% higher than that of devices with a tungsten-oxide (WO3) CGL. The maximum current density of the current limited devices with a HAT-CN CGL was as high as 259 mA/cm2. The brightness of the tandem OLEDs with a HAT-CN CGL was 15% higher than that of the tandem OLEDs with a WO3 CGL due to an increase in the current density. The charge-generation mechanisms of tandem OLEDs with a CGL were described on the basis of the experimental results.

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