scholarly journals Bipyridine‐Containing Host Materials for High Performance Yellow Thermally Activated Delayed Fluorescence‐Based Organic Light Emitting Diodes with Very Low Efficiency Roll‐Off

2019 ◽  
Vol 8 (1) ◽  
pp. 1901283 ◽  
Author(s):  
Dongyang Chen ◽  
Pachaiyappan Rajamalli ◽  
Francisco Tenopala‐Carmona ◽  
Cameron L. Carpenter‐Warren ◽  
David B. Cordes ◽  
...  
Keyword(s):  
High Performance ◽  
Light Emitting Diodes ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
Organic Light ◽  
Host Materials ◽  
Low Efficiency

High-performance hybrid white organic light-emitting diodes with simple emitting structures and low efficiency roll-off based on blue thermally activated delayed fluorescence emitters with bipolar transport characteristics

2018 ◽  
Vol 6 (35) ◽  
pp. 9510-9516 ◽  
Author(s):  
Chenyang Zhao ◽  
Tianmu Zhang ◽  
Jiangshan Chen ◽  
Donghang Yan ◽  
Dongge Ma
Keyword(s):  
High Performance ◽  
Light Emitting Diodes ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
Highly Efficient ◽  
Organic Light ◽  
Low Efficiency

Highly efficient and low efficiency roll-off WOLEDs by simple insertion of multi-ultrathin phosphorescent layers within blue TADF emitters.

Solution-processable orange-red thermally activated delayed fluorescence emitters with 3,6-disubstituted carbazole for highly efficient OLEDs with low efficiency roll-off

2022 ◽  
Author(s):  
Yaxing Zhang ◽  
Yuanyuan Zheng ◽  
Changsheng Shi ◽  
Jinyan Zhang ◽  
Tao Wang ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
Organic Light ◽  
Green Materials ◽  
Device Efficiency ◽  
Low Efficiency

The progress of orange-red thermally activated delayed fluorescence (TADF) emitters for solution-processed organic light-emitting diodes (OLEDs) is still lagged behind blue and green materials in terms of device efficiency. In...

Thermally activated delayed fluorescence exciplex emitters for high-performance organic light-emitting diodes

2021 ◽  
Author(s):  
Ming Zhang ◽  
Cai-Jun Zheng ◽  
Hui Lin ◽  
Si-Lu Tao
Keyword(s):  
High Performance ◽  
Light Emitting Diodes ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
Organic Light

Owing to their natural thermally activated delayed fluorescence (TADF) characteristics, the development of exciplex emitters for organic light-emitting diodes (OLEDs) has witnessed booming progress in recent years.

Molecular engineering of thermally activated delayed fluorescence emitters to concurrently achieve high performance and reduced efficiency roll-off in organic light-emitting diodes

2019 ◽  
Vol 7 (32) ◽  
pp. 9966-9974 ◽  
Author(s):  
Bowen Li ◽  
Zhiyi Li ◽  
Xiaofang Wei ◽  
Fengyun Guo ◽  
Ying Wang ◽  
...  
Keyword(s):  
High Performance ◽  
Light Emitting Diodes ◽  
Delayed Fluorescence ◽  
Molecular Engineering ◽  
Organic Light Emitting Diodes ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
Organic Light ◽  
Generation Technology

Thermally activated delayed fluorescence (TADF) emitter based organic light-emitting diodes (OLEDs) utilizing both singlet and triplet excitons are considered as the most promising third-generation technology for lighting and display.

Noble Dibenzothiophene-Based Bipolar Hosts for Blue Organic Light-Emitting Diodes Using Thermally Activated Delayed Fluorescence

2020 ◽  
Vol 20 (11) ◽  
pp. 7191-7195
Author(s):  
JaMin Lee ◽  
Sae Won Lee ◽  
Young Sik Kim
Keyword(s):  
Dft Calculations ◽  
Light Emitting Diodes ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
Organic Light ◽  
Host Materials ◽  
Td Dft

Novel thermally activated delayed fluorescence (TADF) host materials for blue electrophosphores-cence were designed by combining the electron acceptor dibenzothiophene (DBT) unit and the electron donor acridine derivatives into a single molecular unit by density functional theory (DFT). Depending on the optimal charge transfer, DFT and time-dependent DFT (TD-DFT) calculations for the ground state were performed to obtain the energy of the singlet (S1) and triplet (T1) excited states of the TADF material for Hartree-Fock percentage of TD-DFT. The sufficiently large separation between the HOMO and LUMO resulted in a small difference in energy (ΔEST) between the S1 and T1 states using DFT and TD-DFT calculations. The host molecules retained high triplet energy and showed great potential for use in blue organic light-emitting diodes (OLED). The results showed that these molecules are a good TADF host materials because they have a low barrier to hole and electron injection with a balanced charge transporting property for both holes and electrons, and a small ΔEST.

Efficient thermally activated delayed fluorescence of functional phenylpyridinato boron complexes and high performance organic light-emitting diodes

2017 ◽  
Vol 5 (6) ◽  
pp. 1452-1462 ◽  
Author(s):  
Yi-Jiun Shiu ◽  
Yi-Ting Chen ◽  
Wei-Kai Lee ◽  
Chung-Chih Wu ◽  
Tzu-Chieh Lin ◽  
...  
Keyword(s):  
High Performance ◽  
Light Emitting Diodes ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
Organic Light ◽  
Boron Complexes

A new series of functional phenylpyridinato boron complexes possessing thermally activated delayed fluorescence (TADF) has been strategically designed and synthesized.

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