High-performance sky-blue phosphorescent organic light-emitting diodes employing wide-bandgap bipolar host materials with thermally activated delayed fluorescence characteristics

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.

Download Full-text

High performance organic light-emitting diodes with tunable color range from orange to warm white based on single thermally activated delayed fluorescence emitter

Optical Materials ◽

10.1016/j.optmat.2018.09.006 ◽

2018 ◽

Vol 85 ◽

pp. 349-355 ◽

Cited By ~ 2

Author(s):

Yingjie Cui ◽

Yunlong Jiang ◽

Liang Zhou ◽

Weiqiang Liu ◽

Qi Zhu ◽

...

Keyword(s):

High Performance ◽

Light Emitting Diodes ◽

Delayed Fluorescence ◽

Organic Light Emitting Diodes ◽

Thermally Activated Delayed Fluorescence ◽

Light Emitting ◽

Thermally Activated ◽

Organic Light ◽

Color Range

Download Full-text

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

Journal of Materials Chemistry C ◽

10.1039/c9tc02186h ◽

2019 ◽

Vol 7 (32) ◽

pp. 9966-9974 ◽

Cited By ~ 9

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.

Download Full-text

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

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2020.18856 ◽

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.

Download Full-text

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

Journal of Materials Chemistry C ◽

10.1039/c6tc04994j ◽

2017 ◽

Vol 5 (6) ◽

pp. 1452-1462 ◽

Cited By ~ 38

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.

Download Full-text