scholarly journals Zeolite-confined carbon dots: tuning thermally activated delayed fluorescence emission via energy transfer

2020 ◽  
Vol 4 (5) ◽  
pp. 1404-1410 ◽  
Author(s):  
Hongyue Zhang ◽  
Jiancong Liu ◽  
Bolun Wang ◽  
Kaikai Liu ◽  
Guangrui Chen ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Transfer Process ◽  
Carbon Dots ◽  
Energy Transfer Process ◽  
Fluorescence Emission ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated

CD@zeolite composites with tunable TADF emission via an energy transfer process between confined CDs.

Ideal blue thermally activated delayed fluorescence emission assisted by a thermally activated delayed fluorescence assistant dopant through a fast reverse intersystem crossing mediated cascade energy transfer process

2019 ◽  
Vol 7 (10) ◽  
pp. 3082-3089 ◽  
Author(s):  
Si Hyun Han ◽  
Jae Ho Jeong ◽  
Ji Woong Yoo ◽  
Jun Yeob Lee
Keyword(s):  
Energy Transfer Process ◽  
Light Emitting Diode ◽  
Fluorescence Emission ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Thermally Activated ◽  
Organic Light ◽  
Cascade Energy

A novel blue thermally activated delayed fluorescence (TADF) organic light-emitting diode with an emitting layer made up of a TADF assistant dopant and a pure blue-emitting TADF emitter was developed.

Exciton energy transfer and bi-exciton annihilation in the emitting layers of thermally activated delayed fluorescence-based OLEDs

2021 ◽  
Author(s):  
Hyunchul Kang ◽  
Han-Jin Ahn ◽  
Gyeong-Woo Kim ◽  
Ji-Eun Jeong ◽  
Han Young Woo ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Light Emitting Diodes ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Exciton Energy ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
Organic Light ◽  
Exciton Annihilation

Understanding the exciton energy transfer and bi-exciton annihilation processes in the emitting layers (EMLs) of thermally activated delayed fluorescence (TADF)-based organic light-emitting diodes (OLEDs) is essential for improving their internal...

scholarly journals Carbon dots in zeolites: A new class of thermally activated delayed fluorescence materials with ultralong lifetimes

2017 ◽  
Vol 3 (5) ◽  
pp. e1603171 ◽  
Author(s):  
Jiancong Liu ◽  
Ning Wang ◽  
Yue Yu ◽  
Yan Yan ◽  
Hongyue Zhang ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
New Class

scholarly journals Thermally activated delayed fluorescence with 7% external quantum efficiency from a light-emitting electrochemical cell

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Petter Lundberg ◽  
Youichi Tsuchiya ◽  
E. Mattias Lindh ◽  
Shi Tang ◽  
Chihaya Adachi ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Active Material ◽  
Fluorescence Emission ◽  
Single Layer ◽  
Delayed Fluorescence ◽  
Electrochemical Cells ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated

AbstractWe report on light-emitting electrochemical cells, comprising a solution-processed single-layer active material and air-stabile electrodes, that exhibit efficient and bright thermally activated delayed fluorescence. Our optimized devices delivers a luminance of 120 cd m−2 at an external quantum efficiency of 7.0%. As such, it outperforms the combined luminance/efficiency state-of-the art for thermally activated delayed fluorescence light-emitting electrochemical cells by one order of magnitude. For this end, we employed a polymeric blend host for balanced electrochemical doping and electronic transport as well as uniform film formation, an optimized concentration (<1 mass%) of guest for complete host-to-guest energy transfer at minimized aggregation and efficient emission, and an appropriate concentration of an electrochemically stabile electrolyte for desired doping effects. The generic nature of our approach is manifested in the attainment of bright and efficient thermally activated delayed fluorescence emission from three different light-emitting electrochemical cells with invariant host:guest:electrolyte number ratio.

Spin-pair state-induced exceptional magnetic field responses from a thermally activated delayed fluorescence-assisted fluorescent material doping system

2019 ◽  
Vol 21 (32) ◽  
pp. 17673-17686
Author(s):  
Yeqian Hu ◽  
Xiantong Tang ◽  
Ruiheng Pan ◽  
Jinqiu Deng ◽  
Hongqiang Zhu ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Energy Transfer ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Spin Pair ◽  
Thermally Activated ◽  
Transfer Processes ◽  
System P ◽  
Complex Spin ◽  
Pair State

Some exceptional magnetic field responses reflect complex spin-pair states and energy transfer processes in thermally activated delayed fluorescence-assisted fluorescent OLEDs.

Preparation of Eu (III) and Tb (III) Complex Materials

2011 ◽  
Vol 366 ◽  
pp. 149-152
Author(s):  
Xi Shi Tai
Keyword(s):  
Energy Transfer ◽  
Transfer Process ◽  
Energy Gap ◽  
Energy Transfer Process ◽  
Fluorescence Emission ◽  
Complex Materials ◽  
Luminescent Spectra ◽  
The Eu

Two new Eu (III) and Tb (III) complexes material have been prepared by the reaction of Eu (III) and Tb (III) ions with 1-acetyl-2-naphthol-4, 4’-diaminodiphenylsulfone, respectively. The material was characterized by infrared and luminescent spectra. The results indicate that the Eu (III) and Tb (III) complexes material do not exhibit their characteristic luminescence emissions, and only exhibit the fluorescence emission of the ligand in solid. This may be due to the energy gap between the ligand triplet levels and the emitting level of Eu (III) or Tb (III) ions do not favor to the energy transfer process for Eu (III) or Tb (III) ions.

Achieving high power efficiency and low roll-off OLEDs based on energy transfer from thermally activated delayed excitons to fluorescent dopants

2015 ◽  
Vol 51 (60) ◽  
pp. 11972-11975 ◽  
Author(s):  
Shipan Wang ◽  
Yuewei Zhang ◽  
Weiping Chen ◽  
Jinbei Wei ◽  
Yu Liu ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Power Efficiency ◽  
High Efficiency ◽  
Delayed Fluorescence ◽  
Triplet Energy ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
External Power ◽  
Triplet Energy Transfer

A high-efficiency fluorescent organic light-emitting device with a maximum external power efficiency (PE) of 53.4 lm W−1 was fabricated through efficient triplet energy transfer from a thermally activated delayed fluorescence (TADF) host to conventional fluorescent dopants.

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