The Second-Order NLO and TADF Properties of Donor−Acceptor Dihydropyrene – Cyclophanediene System: the Impact of Molecular Architectures and Polarizable Environment

2021 ◽  
Author(s):  
yao Yao ◽  
Hongliang Xu ◽  
Zhong-Min Su
Keyword(s):  
Optical Properties ◽  
Nonlinear Optical ◽  
Delayed Fluorescence ◽  
Second Order ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Donor Acceptor ◽  
Molecular Architectures ◽  
The Impact

The electro-optical properties (nonlinear optical (NLO) and thermally activated delayed fluorescence (TADF) properties) of negative T-type dihydropyrene (DHP)-cyclophanediene (CPD) photoswitch were studied systematically in this work. An interesting “seesaw” phenomenon...

The Inspiration and Challenge for Through-Space Charge Transfer Architecture: From Thermally Activated Delayed Fluorescence to Nonlinear Optical Properties

2021 ◽  
Author(s):  
Jin-Ting Ye ◽  
Yongqing Qiu
Keyword(s):  
Optical Properties ◽  
Charge Transfer ◽  
Space Charge ◽  
Electron Acceptor ◽  
Nonlinear Optical ◽  
Organic Molecules ◽  
Building Blocks ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated

Organic molecules consisting of electron donor (D) and electron acceptor (A) subunits linked by π-conjugated bridge are promising building blocks for the thermally activated delayed fluorescence (TADF) and nonlinear optical...

Enhancing thermally activated delayed fluorescence characteristics by intramolecular B–N coordination in a phenylpyridine-containing donor–acceptor π-system

2017 ◽  
Vol 53 (62) ◽  
pp. 8723-8726 ◽  
Author(s):  
Kyohei Matsuo ◽  
Takuma Yasuda
Keyword(s):  
Delayed Fluorescence ◽  
Fluorescence Properties ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
System P ◽  
Fluorescence Characteristics ◽  
Donor Acceptor ◽  
The Impact

The impact of intramolecular B–N coordination on the photophysical and thermally activated delayed fluorescence properties was investigated.

Novel thermally activated delayed fluorescence materials by high-throughput virtual screening: going beyond donor–acceptor design

2021 ◽  
Vol 9 (9) ◽  
pp. 3324-3333 ◽  
Author(s):  
Ke Zhao ◽  
Ömer H. Omar ◽  
Tahereh Nematiaram ◽  
Daniele Padula ◽  
Alessandro Troisi
Keyword(s):  
Virtual Screening ◽  
Quantum Chemistry ◽  
High Throughput ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Quantum Chemistry Calculations ◽  
Donor Acceptor ◽  
Molecular Semiconductors ◽  
High Throughput Virtual Screening

125 potential TADF candidates are identified through quantum chemistry calculations of 700 molecules derived from a database of 40 000 molecular semiconductors. Most of them are new and some do not belong to the class of donor–acceptor molecules.

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%.

scholarly journals Synthesis and optoelectronic properties of benzoquinone-based donor–acceptor compounds

2019 ◽  
Vol 15 ◽  
pp. 2914-2921
Author(s):  
Daniel R Sutherland ◽  
Nidhi Sharma ◽  
Georgina M Rosair ◽  
Ifor D W Samuel ◽  
Ai-Lan Lee ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Delayed Fluorescence ◽  
Optoelectronic Properties ◽  
Donor Group ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Palladium Catalyzed ◽  
Donor Acceptor

Herein, we report a mild and efficient palladium-catalyzed C–H functionalization method to synthesize a series of benzoquinone (BQ)-based charge-transfer (CT) derivatives in good yields. The optoelectronic properties of these compounds were explored both theoretically and experimentally and correlations to their structures were identified as a function of the nature and position of the donor group (meta and para) attached to the benzoquinone acceptor. Compound 3, where benzoquinone is para-conjugated to the diphenylamine donor group, exhibited thermally activated delayed fluorescence (TADF) with a biexponential lifetime characterized by a prompt ns component and a delayed component of 353 μs.

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