White Light Afterglow in Carbon Dots Achieved via Synergy between the Room‐Temperature Phosphorescence and the Delayed Fluorescence

Small ◽  
2021 ◽  
pp. 2105415
Author(s):  
Jinyang Zhu ◽  
Junhua Hu ◽  
Qiang Hu ◽  
Xiaoyu Zhang ◽  
Elena V. Ushakova ◽  
...  
Keyword(s):  
White Light ◽  
Carbon Dots ◽  
Room Temperature ◽  
Delayed Fluorescence ◽  
Room Temperature Phosphorescence

Tunable afterglow luminescence and triple-mode emissions of thermally activated carbon dots confined within nanoclays

2019 ◽  
Vol 7 (43) ◽  
pp. 13640-13646 ◽  
Author(s):  
Yuchen Deng ◽  
Peng Li ◽  
Haiyan Jiang ◽  
Xu Ji ◽  
Huanrong Li
Keyword(s):  
Activated Carbon ◽  
Carbon Dots ◽  
Room Temperature ◽  
Delayed Fluorescence ◽  
Excitation Wavelength ◽  
Room Temperature Phosphorescence ◽  
Temperature Variations ◽  
Thermally Activated ◽  
Multi Mode ◽  
Triple Mode

Tunable afterglow luminescence and interesting multi-mode emissions (fluorescence (FL), delayed fluorescence (DF), and room-temperature phosphorescence (RTP)) via excitation wavelength and temperature variations were achieved.

scholarly journals A Facile Co-crystallization Approach to Fabricate Two-component Carbon Dots Composites Showing Time-Dependent Evolutive Room Temperature Phosphorescence Colors

2021 ◽  
Author(s):  
Jian Qu ◽  
Xin Zhang ◽  
Zhong-Jie Wang ◽  
Shuyan Zhang ◽  
Yejian Yu ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Room Temperature ◽  
Data Encryption ◽  
Time Dependent ◽  
Security Level ◽  
Room Temperature Phosphorescence ◽  
Two Component ◽  
Carbon Based

Time-dependent evolutive afterglow materials can increase the security level by providing additional encryption modes in anti-counterfeiting and data encryption. The design of carbon-based materials with dynamic afterglow colors is attractive...

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%.

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