Highly Efficient Organic Light-Emitting Diodes with Phosphorescent Emitters Having High Quantum Yield and Horizontal Orientation of Transition Dipole Moments

2014 ◽  
Vol 26 (23) ◽  
pp. 3844-3847 ◽  
Author(s):  
Kwon-Hyeon Kim ◽  
Chang-Ki Moon ◽  
Jeong-Hwan Lee ◽  
Sei-Yong Kim ◽  
Jang-Joo Kim
Keyword(s):  
Quantum Yield ◽  
Light Emitting Diodes ◽  
Dipole Moments ◽  
Organic Light Emitting Diodes ◽  
High Quantum Yield ◽  
Transition Dipole ◽  
Light Emitting ◽  
Horizontal Orientation ◽  
Organic Light ◽  
Transition Dipole Moments

scholarly journals Highly effective organic light-emitting diodes containing thermally activated delayed fluorescence emitters with horizontal molecular orientation

RSC Advances ◽  
2020 ◽  
Vol 10 (70) ◽  
pp. 42897-42902
Author(s):  
Chan Hee Lee ◽  
Shin Hyung Choi ◽  
Sung Joon Oh ◽  
Jun Hyeon Lee ◽  
Jae Won Shim ◽  
...  
Keyword(s):  
Dipole Moments ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Host Matrix ◽  
Transition Dipole ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
Organic Light ◽  
Transition Dipole Moments

The linear D–A–D type of molecular structure of AcPYM and PxPYM enhances the horizontally oriented alignment and up to 87% of the horizontal transition dipole moments in the host matrix is realized.

scholarly journals Calculating transition dipole moments of phosphorescent emitters for efficient organic light-emitting diodes

2019 ◽  
Vol 21 (19) ◽  
pp. 9740-9746
Author(s):  
Mohammad Babazadeh ◽  
Paul L. Burn ◽  
David M. Huang
Keyword(s):  
Dipole Moment ◽  
Quantum Chemical ◽  
Dipole Moments ◽  
Molecular Geometry ◽  
Transition Dipole Moment ◽  
Organic Light Emitting Diodes ◽  
Transition Dipole ◽  
Light Emitting ◽  
Organic Light ◽  
Transition Dipole Moments

Quantum-chemical calculations show that the direction of the transition dipole moment of organometallic phosphorescent emitters is sensitive to molecular geometry.

Organic light emitting diodes with horizontally oriented thermally activated delayed fluorescence emitters

2017 ◽  
Vol 5 (5) ◽  
pp. 1216-1223 ◽  
Author(s):  
D. H. Kim ◽  
K. Inada ◽  
L. Zhao ◽  
T. Komino ◽  
N. Matsumoto ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Critical Role ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Transition Dipole ◽  
Light Emitting ◽  
Thermally Activated ◽  
Horizontal Orientation ◽  
Organic Light ◽  
Emission Transition

Horizontal orientation of the emission transition dipole of TADF molecules plays a critical role on the light outcoupling efficiency and the performance of TADF organic light-emitting diodes.

Plastic Multilayered Molecular Organic Light Emitting Diodes

1997 ◽  
Vol 488 ◽  
Author(s):  
George M. Daly ◽  
Hideyuki Murata ◽  
Charles D. Merritt ◽  
Zakya H. Kafafi ◽  
Hiroshi Inada ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Power Efficiency ◽  
Light Emitting Diodes ◽  
Hole Transport ◽  
Organic Light Emitting Diodes ◽  
Electron Transport Layer ◽  
Light Emitting ◽  
Organic Light ◽  
Device Structures ◽  
External Quantum Yield

AbstractEnhanced performance has been observed for plastic molecular organic light emitting diodes (MOLEDs) consisting of two to four organic layers sequentially vacuum vapor deposited onto patterned indium-tin oxide (ITO) on polyester films. For all device structures studied, the performance of plastic diodes is comparable to or better than their analogs on glass substrates. At 100 A/m2, a luminous power efficiency of 4.4 lm/W and external quantum yield of 2.7% are measured for a device structure consisting of two hole transport layers, a doped emitting layer and an electron transport layer on a polyester substrate. The same device made on a silica substrate has a luminous power efficiency of 3.5 lm/W and external quantum yield of 2.3%. Electrical and optical performance for comparable device structures has been characterized by current-voltage-luminance measurements and electroluminescence spectra collected normal to the emitting surface. In addition, an integrating sphere was used to collect the total light emitted and to determine the optical output coupling on glass versus plastic substrates.

Correlating Optical and Electrical Dipole Moments To Pinpoint Phosphorescent Dye Alignment in Organic Light-Emitting Diodes

2018 ◽  
Vol 10 (37) ◽  
pp. 31541-31551 ◽  
Author(s):  
Thomas Morgenstern ◽  
Markus Schmid ◽  
Alexander Hofmann ◽  
Markus Bierling ◽  
Lars Jäger ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Dipole Moments ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Electrical Dipole ◽  
Organic Light

Fluctuating Emission Dipole Moments of Aligned Phosphors in Organic Light-Emitting Diodes

2016 ◽  
Author(s):  
Rossa Mac Ciarnain ◽  
Dirk Michaelis ◽  
Thomas Wehlus ◽  
Andreas F. Rausch ◽  
Sebastian Wehrmeister ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Dipole Moments ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light

Molecular Design Opening Two Emission Pathways for High Efficiency and Long Lifetime in Thermally Activated Delayed Fluorescent Organic Light-Emitting Diodes

2021 ◽  
Author(s):  
Ha Lim Lee ◽  
Kyung Hyung Lee ◽  
Jun Yeob Lee ◽  
Ho Jung Lee
Keyword(s):  
Quantum Yield ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Molecular Design ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Thermally Activated ◽  
Photoluminescence Quantum Yield ◽  
Organic Light ◽  
Long Lifetime

High efficiency and long lifetime thermally activated delayed fluorescent (TADF) organic light-emitting diodes (OLEDs) were developed using a novel molecular design with two emission pathways for high photoluminescence quantum yield...

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