scholarly journals Indirect consequences of exciplex states on the phosphorescence lifetime of phenazine-based 1,2,3-triazole luminescent probes

2017 ◽  
Vol 19 (5) ◽  
pp. 3473-3479 ◽  
Author(s):  
Bárbara B. A. Costa ◽  
Guilherme A. M. Jardim ◽  
Paloma L. Santos ◽  
Hállen D. R. Calado ◽  
Andrew P. Monkman ◽  
...  
Keyword(s):  
Room Temperature ◽  
Delayed Fluorescence ◽  
Phosphorescence Lifetime ◽  
Luminescent Probes ◽  
Exciplex Formation ◽  
Phenazine Derivative ◽  
Fluorescence And Phosphorescence

Exciplex formation, and delayed fluorescence and phosphorescence interplay interactions were investigated in phenazine derivative solutions at room temperature.

scholarly journals Thermally activated delayed fluorescence with a narrow emission spectrum and organic room temperature phosphorescence by controlling spin–orbit coupling and phosphorescence lifetime of metal-free organic molecules

2018 ◽  
Vol 6 (20) ◽  
pp. 5434-5443 ◽  
Author(s):  
Piotr Pander ◽  
Agnieszka Swist ◽  
Radoslaw Motyka ◽  
Jadwiga Soloducho ◽  
Fernando B. Dias ◽  
...  
Keyword(s):  
Room Temperature ◽  
Organic Molecules ◽  
Delayed Fluorescence ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Room Temperature Phosphorescence ◽  
Phosphorescence Lifetime ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Narrow Emission

A novel acridone derivative is presented showing TADF and narrow blue electroluminescence.

Ni-catalyzed cascade coupling reactions: synthesis and thermally-activated delayed fluorescence characterization of quinazolinone derivatives

2021 ◽  
Author(s):  
Zhongyan Chen ◽  
Lepeng Chen ◽  
Shou-Feng Zhang ◽  
Qianqian Zhen ◽  
Wenzhang Xiong ◽  
...  
Keyword(s):  
Functional Groups ◽  
Room Temperature ◽  
Delayed Fluorescence ◽  
Coupling Reactions ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Quinazolinone Derivatives

A nickel-catalyzed synthesis of 1,3-diaryl-6H-pyrazino[2,1-b]quinazolin-6-one was developed. This method enabled to access valuable pyrazino-fused quinazolinones with tolerance of many functional groups even at room temperature. The desired pyrazino-fused quinazolinones emit...

scholarly journals Regioisomeric Effect on the Excited-State Fate Leading to Room-Temperature Phosphorescence or Thermally Activated Delayed Fluorescence in a Dibenzophenazine-Cored Donor–Acceptor–Donor System

2021 ◽  
Author(s):  
Takumi Hosono ◽  
Nicolas Oliveira Decarli ◽  
Paola Zimmermann Crocomo ◽  
Tsuyoshi Goya ◽  
Leonardo Evaristo de Sousa ◽  
...  
Keyword(s):  
Excited State ◽  
Room Temperature ◽  
Delayed Fluorescence ◽  
Quantum Yields ◽  
Room Temperature Phosphorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
Donor Acceptor ◽  
Emission Behavior

Exploring design principle for switching thermally activated dealyed fluorescecne (TADF) and room temperature phosphorescence (RTP) is a fundamentally imporant research in developing triplet-mediated photofunctional organic materials. Herein systematic studies on the regioisomeric and substituents effects in a twisted donor–acceptor–donor (D–A–D) scaffold (A = dibenzo[a,j]phenazine; D = dihydrophenazasiline) on the fate of the excited state have been performed. The study revealed that the regiosiomerism clearly affects the emission behavior of the D–A–D compounds. Distinct difference in TADF, dual TADF & RTP, and dual RTP were observed, depending on the host used. Furthermore, OLED organic light-emitting diodes (OLEDs) fabricated with the developed emitters achieved high external quantum yields for RTP-based OLEDS up to 7.4%.

3.4: Room Temperature Dual Emission of Fluorescence and Phosphorescence in the Solid State

2018 ◽  
Vol 49 ◽  
pp. 26-28
Author(s):  
Kazunori Ueno ◽  
Melissa Skidmoreb ◽  
Andrew Scully ◽  
Tony Wilson ◽  
Craig Forsyth ◽  
...  
Keyword(s):  
Solid State ◽  
Room Temperature ◽  
Dual Emission ◽  
Fluorescence And Phosphorescence

Ultralong lifetime room temperature phosphorescence and dual-band waveguide behavior of phosphoramidic acid oligomers

2020 ◽  
Vol 8 (22) ◽  
pp. 7330-7335 ◽  
Author(s):  
Zheng-Fei Liu ◽  
Xue Chen ◽  
Wei Jun Jin
Keyword(s):  
Quantum Yield ◽  
Optical Waveguide ◽  
Room Temperature ◽  
Dual Band ◽  
High Quantum Yield ◽  
Room Temperature Phosphorescence ◽  
Phosphorescence Lifetime ◽  
High Quantum ◽  
New System

The phosphoramidic acid oligomer as an organic non-conjugated RTP system is proposed. The new system not only has ultralong phosphorescence lifetime up to 777 ms and high quantum yield, but also displays dual-band optical waveguide behavior.

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