scholarly journals Manipulating exciton dynamics of thermally activated delayed fluorescence materials for tuning two-photon nanotheranostics

2020 ◽  
Vol 11 (3) ◽  
pp. 888-895 ◽  
Author(s):  
Ya-Fang Xiao ◽  
Jia-Xiong Chen ◽  
Shengliang Li ◽  
Wen-Wen Tao ◽  
Shuang Tian ◽  
...  
Keyword(s):  
Energy Flow ◽  
Fluorescence Emission ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Exciton Dynamics ◽  
Oxygen Generation ◽  
Efficient Energy ◽  
Thermally Activated ◽  
Two Photon ◽  
Singlet Oxygen Generation

Exciton dynamics can be manipulated rationally in the design of TADF materials for nanotheranostics. Regulating the ΔEST and f promises efficient energy flow for tailoring balances between singlet oxygen generation and fluorescence emission.

Theoretical studies on full-color thermally activated delayed fluorescence molecules

2020 ◽  
Vol 8 (17) ◽  
pp. 5839-5846 ◽  
Author(s):  
Lei Liu ◽  
Qi Wei ◽  
Yajuan Cheng ◽  
Huili Ma ◽  
Shiyun Xiong ◽  
...  
Keyword(s):  
Delayed Fluorescence ◽  
Theoretical Studies ◽  
Efficiency Improvement ◽  
Thermally Activated Delayed Fluorescence ◽  
Exciton Dynamics ◽  
Detailed Mechanism ◽  
Thermally Activated ◽  
Full Color

This work provides a detailed mechanism for exciton dynamics in D–π–A–π–D TADF molecules and strategies for further efficiency improvement.

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.

scholarly journals Photoluminescence Quenching Probes Spin Conversion and Exciton Dynamics in Thermally Activated Delayed Fluorescence Materials

2019 ◽  
Vol 31 (21) ◽  
pp. 1804490 ◽  
Author(s):  
Brett Yurash ◽  
Hajime Nakanotani ◽  
Yoann Olivier ◽  
David Beljonne ◽  
Chihaya Adachi ◽  
...  
Keyword(s):  
Delayed Fluorescence ◽  
Photoluminescence Quenching ◽  
Spin Conversion ◽  
Thermally Activated Delayed Fluorescence ◽  
Exciton Dynamics ◽  
Thermally Activated

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.

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.

Two-channel emission controlled by a conjugation valve for the color switching of thermally activated delayed fluorescence emission

2019 ◽  
Vol 7 (32) ◽  
pp. 9908-9916 ◽  
Author(s):  
Rajendra Kumar Konidena ◽  
Kyung Hyung Lee ◽  
Jun Yeob Lee
Keyword(s):  
Molecular Design ◽  
Fluorescence Emission ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
Emission Color ◽  
Valve Structure ◽  
Color Control ◽  
Color Switching

Herein, we demonstrate the first example of molecular design concept combining the two channel emission process and conjugation managing valve structure for emission color control and high light-emitting efficiency of the TADF emitters.

Rationally designed organelle-specific thermally activated delayed fluorescence small molecule organic probes for time-resolved biological applications

2019 ◽  
Vol 55 (39) ◽  
pp. 5639-5642 ◽  
Author(s):  
Qingyang Zhang ◽  
Shengnan Xu ◽  
Meng Li ◽  
Yali Wang ◽  
Na Zhang ◽  
...  
Keyword(s):  
Small Molecule ◽  
Fluorescence Emission ◽  
Delayed Fluorescence ◽  
Biological Applications ◽  
Time Resolved ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Emission Lifetime ◽  
New Strategy ◽  
In Cells

A new strategy for TADF-based probes to maintain long fluorescence emission lifetime in TRFI studies in cells was developed.

Donor–acceptor materials exhibiting deep blue emission and thermally activated delayed fluorescence with tris(triazolo)triazine

2021 ◽  
Author(s):  
Ryoga Hojo ◽  
Don M. Mayder ◽  
Zachary M. Hudson
Keyword(s):  
Blue Emission ◽  
Delayed Fluorescence ◽  
Fluorescence Properties ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Two Photon ◽  
Deep Blue ◽  
Donor Acceptor ◽  
Two Photon Fluorescence ◽  
Photon Fluorescence

Five emitters with the tris(triazolo)triazine acceptor core are reported, with emission from deep blue to green. These emitters show promising thermally activated delayed fluorescence and/or two-photon fluorescence properties.

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