High-efficiency and low roll-off deep-blue OLEDs enabled by thermally activated delayed fluorescence emitter with preferred horizontal dipole orientation

2021 ◽  
pp. 133598
Author(s):  
Tao Hua ◽  
Yu-Chun Liu ◽  
Chih-Wei Huang ◽  
Nengquan Li ◽  
Changjiang Zhou ◽  
...  
Keyword(s):  
High Efficiency ◽  
Delayed Fluorescence ◽  
Dipole Orientation ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Deep Blue

High-efficiency pure blue thermally activated delayed fluorescence emitters with a preferentially horizontal emitting dipole orientation via a spiro-linked double D–A molecular architecture

2019 ◽  
Vol 7 (35) ◽  
pp. 10851-10859 ◽  
Author(s):  
Xuan Zeng ◽  
Kuan-Chung Pan ◽  
Wei-Kai Lee ◽  
Shaolong Gong ◽  
Fan Ni ◽  
...  
Keyword(s):  
High Efficiency ◽  
Delayed Fluorescence ◽  
Molecular Architecture ◽  
Dipole Orientation ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated

A spiro-linked double D–A molecular architecture has been introduced to construct blue thermally activated delayed fluorescence (TADF) emitters with a preferentially horizontal emitting dipole orientation.

scholarly journals Extremely condensing triplet states of DPEPO-type hosts through constitutional isomerization for high-efficiency deep-blue thermally activated delayed fluorescence diodes

2016 ◽  
Vol 7 (4) ◽  
pp. 2870-2882 ◽  
Author(s):  
Jing Zhang ◽  
Dongxue Ding ◽  
Ying Wei ◽  
Hui Xu
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
High Efficiency ◽  
State Of The Art ◽  
Delayed Fluorescence ◽  
Triplet States ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Deep Blue ◽  
Art Performance

An asymmetric constitutional isomer of the thermally activated delayed fluorescence (TADF) host DPEPO, named 24′DPEPO, endowed deep-blue TADF diodes with state-of-the-art performance, including external quantum efficiency beyond 20%.

scholarly journals δ-Carboline-based bipolar host materials for deep blue thermally activated delayed fluorescence OLEDs with high efficiency and low roll-off characteristic

RSC Advances ◽  
2018 ◽  
Vol 8 (31) ◽  
pp. 17025-17033 ◽  
Author(s):  
Ji Su Moon ◽  
Dae Hyun Ahn ◽  
Si Woo Kim ◽  
Seung Yeon Lee ◽  
Ju Young Lee ◽  
...  
Keyword(s):  
External Quantum Efficiency ◽  
High Efficiency ◽  
Delayed Fluorescence ◽  
Triplet Energy ◽  
Characteristic P ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Deep Blue ◽  
Host Materials ◽  
Low Efficiency

We report two new bipolar host materials with ~3.0 eV high triplet energy. Fabricated deep blue TADF OLEDs with these hosts exhibited external quantum efficiency as high as 22.9% and low efficiency roll-off (19.2% at 1000 cd m–2).

High-efficiency thermally activated delayed fluorescence emitters via a high horizontal dipole ratio and controlled dual emission

2020 ◽  
Vol 8 (24) ◽  
pp. 8012-8017
Author(s):  
Youngnam Lee ◽  
Jong-In Hong
Keyword(s):  
High Efficiency ◽  
Delayed Fluorescence ◽  
Dipole Orientation ◽  
Dual Emission ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated

OLED devices based on linear rod-like TADF emitters exhibited high device efficiencies of 29.9% and 25.8% by means of high horizontal emitting dipole orientation and controlled dual emission.

scholarly journals Pyrimidine-based twisted donor–acceptor delayed fluorescence molecules: a new universal platform for highly efficient blue electroluminescence

2017 ◽  
Vol 8 (2) ◽  
pp. 953-960 ◽  
Author(s):  
In Seob Park ◽  
Hideaki Komiyama ◽  
Takuma Yasuda
Keyword(s):  
High Efficiency ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Highly Efficient ◽  
Deep Blue ◽  
Donor Acceptor

High-efficiency deep blue thermally activated delayed fluorescence (TADF) emitters consisting of acridan–pyrimidine donor–acceptor motifs are developed.

New hole transport styrene polymers bearing highly π-extended conjugated side-chain moieties for high-performance solution-processable thermally activated delayed fluorescence OLEDs

2021 ◽  
Vol 12 (11) ◽  
pp. 1692-1699
Author(s):  
Ji Hye Lee ◽  
Jinhyo Hwang ◽  
Chai Won Kim ◽  
Amit Kumar Harit ◽  
Han Young Woo ◽  
...  
Keyword(s):  
High Performance ◽  
High Efficiency ◽  
Delayed Fluorescence ◽  
Hole Transport ◽  
Side Chain ◽  
Solution Processed ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Turn On ◽  
Solution Processable

New polystyrene-based polymers with high π-extended hole transport pendants were synthesized to obtain a low turn-on voltage and high efficiency in solution-processed green TADF-OLEDs.

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