Theoretical perspective for internal quantum efficiency of thermally activated delayed fluorescence emitter in solid phase: A QM/MM study

2017 ◽  
Vol 51 ◽  
pp. 349-356 ◽  
Author(s):  
Lili Lin ◽  
Jianzhong Fan ◽  
Chuan-Kui Wang
Keyword(s):  
Quantum Efficiency ◽  
Solid Phase ◽  
Internal Quantum Efficiency ◽  
Theoretical Perspective ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated

Red/Near‐Infrared Thermally Activated Delayed Fluorescence OLEDs with Near 100 % Internal Quantum Efficiency

2019 ◽  
Vol 131 (41) ◽  
pp. 14802-14807 ◽  
Author(s):  
Jia‐Xiong Chen ◽  
Wen‐Wen Tao ◽  
Wen‐Cheng Chen ◽  
Ya‐Fang Xiao ◽  
Kai Wang ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
Near Infrared ◽  
Internal Quantum Efficiency ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated

Theoretical perspective for luminescent mechanism of thermally activated delayed fluorescence emitter with excited-state intramolecular proton transfer

2020 ◽  
Vol 8 (1) ◽  
pp. 98-108 ◽  
Author(s):  
Guanyu Jiang ◽  
Feiyan Li ◽  
Jianzhong Fan ◽  
Yuzhi Song ◽  
Chuan-Kui Wang ◽  
...  
Keyword(s):  
Excited State ◽  
Proton Transfer ◽  
Solid Phase ◽  
Theoretical Perspective ◽  
Intramolecular Proton Transfer ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Luminescent Mechanism

Excited-state intramolecular proton transfer (ESIPT) and thermally activated delayed fluorescence (TADF) mechanisms in solid phase is revealed theoretically.

Red/Near‐Infrared Thermally Activated Delayed Fluorescence OLEDs with Near 100 % Internal Quantum Efficiency

2019 ◽  
Vol 58 (41) ◽  
pp. 14660-14665 ◽  
Author(s):  
Jia‐Xiong Chen ◽  
Wen‐Wen Tao ◽  
Wen‐Cheng Chen ◽  
Ya‐Fang Xiao ◽  
Kai Wang ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
Near Infrared ◽  
Internal Quantum Efficiency ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated

scholarly journals Ladder-like energy-relaying exciplex enables 100% internal quantum efficiency of white TADF-based diodes in a single emissive layer

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Chunmiao Han ◽  
Ruiming Du ◽  
Hui Xu ◽  
Sanyang Han ◽  
Peng Ma ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
Light Emitting Diodes ◽  
Internal Quantum Efficiency ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Emissive Layer ◽  
Thermally Activated ◽  
Organic Light

AbstractDevelopment of white organic light-emitting diodes based on purely thermally activated delayed fluorescence with a single-emissive-layer configuration has been a formidable challenge. Here, we report the rational design of a donor-acceptor energy-relaying exciplex and its utility in fabricating single-emissive-layer, thermally activated delayed fluorescence-based white organic light-emitting diodes that exhibit 100% internal quantum efficiency, 108.2 lm W−1 power efficiency, and 32.7% external quantum efficiency. This strategy enables thin-film fabrication of an 8 cm × 8 cm thermally activated delayed fluorescence white organic light-emitting diodes (10 inch2) prototype with 82.7 lm W−1 power efficiency and 25.0% external quantum efficiency. Introduction of a phosphine oxide-based acceptor with a steric group to the exciplex limits donor-acceptor triplet coupling, providing dual levels of high-lying and low-lying triplet energy. Transient spectroscopic characterizations confirm that a ladder-like energy relaying occurs from the high-lying triplet level of the exciplex to a blue emitter, then to the low-lying triplet level of the phosphine oxide acceptor, and ultimately to the yellow emitter. Our results demonstrate the broad applicability of energy relaying in multicomponent systems for exciton harvesting, providing opportunities for the development of third-generation white organic light-emitting diode light sources.

Constitutional Isomers of Carbazole-Benzoyl-Pyrimidine-Based Thermally Activated Delayed Fluorescence Emitters for Efficient OLEDs

2021 ◽  
Author(s):  
Jayabalan Pandidurai ◽  
Jayachandran Jayakumar ◽  
Yi-Kuan Chen ◽  
Chia-Min Hsieh ◽  
Chien-Hong Cheng
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Internal Quantum Efficiency ◽  
Delayed Fluorescence ◽  
Intersystem Crossing ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated

Thermally activated delayed fluorescence (TADF) emitters are highly useful to achieve 100% internal quantum efficiency (IQE) and high external quantum efficiency (EQE) by reverse intersystem crossing. Herein, four sky-blue to...

Over 20% external quantum efficiency in red thermally activated delayed fluorescence organic light-emitting diodes using a reverse intersystem crossing activating host

2018 ◽  
Vol 6 (20) ◽  
pp. 5363-5368 ◽  
Author(s):  
Ji Han Kim ◽  
Dong Ryun Lee ◽  
Si Hyun Han ◽  
Jun Yeob Lee
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Light Emitting Diodes ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Intersystem Crossing ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
Organic Light

Highly efficient red thermally activated delayed fluorescence organic light-emitting diodes were developed using a reverse intersystem crossing activating host derived from phenylcarbazole and pyridofuropyridine.

High efficiency pure blue thermally activated delayed fluorescence molecules having 10H-phenoxaborin and acridan units

2015 ◽  
Vol 51 (46) ◽  
pp. 9443-9446 ◽  
Author(s):  
Masaki Numata ◽  
Takuma Yasuda ◽  
Chihaya Adachi
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
High Efficiency ◽  
Delayed Fluorescence ◽  
New Materials ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated

New materials emitting pure blue thermally activated delayed fluorescence achieve 20% external quantum efficiency and exhibit nearly concentration-independent photoluminescence.

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