Organic Light-Emitting Diode Composed of an Oligomer Crystal Emission Layer

2019 ◽  
Author(s):  
Takeshi Yamao ◽  
Koki Nishimura ◽  
Yuhi Inada ◽  
Shu Hotta
Keyword(s):  
Light Emitting Diode ◽  
Emission Layer ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Organic Light

High efficiency and simplified white organic light-emitting diode based on a single-host emission layer

2016 ◽  
Vol 220 ◽  
pp. 329-333 ◽  
Author(s):  
Runda Guo ◽  
Shiming Zhang ◽  
Shouzhen Yue ◽  
Pingrui Yan ◽  
Yukun Wu ◽  
...  
Keyword(s):  
High Efficiency ◽  
Light Emitting Diode ◽  
Emission Layer ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Organic Light ◽  
Single Host

scholarly journals Highly Efficient White Organic Light-Emitting Diodes with Controllable Excitons Behavior by a Mixed Interlayer between Fluorescence Blue and Phosphorescence Yellow-Emitting Layers

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Chun-Hong Gao ◽  
Xiao-Bo Shi ◽  
Dong-Ying Zhou ◽  
Lei Zhang ◽  
Zhao-Kui Wang ◽  
...  
Keyword(s):  
Power Efficiency ◽  
Carrier Transport ◽  
Layer Structure ◽  
Light Emitting Diode ◽  
Device Structure ◽  
Emission Layer ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Highly Efficient ◽  
Organic Light

A highly efficient hybrid white organic light-emitting diode (HWOLED) has been demonstrated with a mixed interlayer between fluorescent blue and phosphorescent yellow-emitting layers. The device structure is simplified by using a controllable fluorescence-mixed interlayer-phosphorescence emission layer structure. The electroluminance (EL) performance can be modulated easily by adjusting the ratio of the hole-predominated material to the electron-predominated material in the interlayer. It is found that the HWOLED with a ratio of 3 : 2 exhibits a current efficiency of 34 cd/A and a power efficiency of 29 lm/W at 1000 cd/m2with warm white Commission Internationale de l’Eclairage (CIE1931) coordinates of (0.4273, 0.4439). The improved efficiency and adaptive CIE coordinates are attributed to the controllable mixed interlayer with enhanced charge carrier transport, optimized excitons distribution, and improved harvestings of singlet and triplet excitons.

scholarly journals Leakage-free solution-processed organic light-emitting diode using a ternary host with single-diode emission area up to 6 × 11.5 cm2

RSC Advances ◽  
2019 ◽  
Vol 9 (19) ◽  
pp. 10584-10598 ◽  
Author(s):  
Si-Yi Liao ◽  
Hsiao-Tso Su ◽  
Yung-Hung Hsiao ◽  
Yu-Fan Chang ◽  
Chiung-Wen Chang ◽  
...  
Keyword(s):  
Light Emitting Diode ◽  
Free Solution ◽  
Emission Layer ◽  
Solution Processed ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Emission Area ◽  
Organic Light ◽  
Host Materials

OLEDs with an emission layer consisting of ternary mixed host materials are prepared with operation of over 1600 hours.

scholarly journals Green phosphorescent organic light-emitting diode exhibiting highest external quantum efficiency with ultra-thin undoped emission layer

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Shin Woo Kang ◽  
Dong-Hyun Baek ◽  
Byeong-Kwon Ju ◽  
Young Wook Park
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
High Efficiency ◽  
Light Emitting Diode ◽  
Organic Light Emitting Diodes ◽  
Emission Layer ◽  
Systematic Analysis ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Organic Light

AbstractIn this study, we report highly efficient green phosphorescent organic light-emitting diodes (OLEDs) with ultra-thin emission layers (EMLs). We use tris[2-phenylpyridinato-C2,N]iridium(III) (Ir(ppy)3), a green phosphorescent dopant, for creating the OLEDs. Under systematic analysis, the peak external quantum efficiency (EQE) of an optimized device based on the ultra-thin EML structure is found to be approximately 24%. This result is highest EQE among ultra-thin EML OLEDs and comparable to the highest efficiency achieved by OLEDs using Ir(ppy)3 that are fabricated via conventional doping methods. Moreover, this result shows that OLEDs with ultra-thin EML structures can achieve ultra-high efficiency.

Optical Modeling of Organic Light-Emitting Diode Multilayer Device Structures

2000 ◽  
Vol 660 ◽  
Author(s):  
K. B. Kahen
Keyword(s):  
Power Distribution ◽  
Light Emitting Diode ◽  
Constant Current ◽  
Device Layer ◽  
Emission Layer ◽  
Radiant Intensity ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Organic Light ◽  
Dipole Emission

ABSTRACTWe present an exact classical solution to the problem of dipole emission in a planar multilayer organic light-emitting diode (OLED) device. The inputs to the model are the photoluminescence and quantum yield of the emitter material, and the device layer thicknesses and indices of refraction. The results of the model are applied to predicting the radiant intensity of OLEDs as a function of varying device layer thickness. It is shown that the calculated radiances are in excellent agreement with the data; this suggests that at constant current the variation in electroluminescence caused by modifications of the layer thicknesses can be completely accounted for by optical effects. Finally, we present results (for positions both internal and external to the diodes) for the Poynting power distribution from a randomly aligned dipole in the emission layer.

Highly efficient yellow organic light emitting diode based on a layer-cross faded emission layer allowing easy color tuning

2009 ◽  
Vol 95 (21) ◽  
pp. 213305 ◽  
Author(s):  
Florian Lindla ◽  
Manuel Boesing ◽  
Christoph Zimmermann ◽  
Frank Jessen ◽  
Philipp van Gemmern ◽  
...  
Keyword(s):  
Light Emitting Diode ◽  
Emission Layer ◽  
Color Tuning ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Highly Efficient ◽  
Organic Light
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