A5100438044- Organic Light-Emitting Diodes Research
- Luminescence and Fluorescent Materials
- Organic Electronics and Photovoltaics
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Photonic and Optical Devices
- Semiconductor materials and devices
- Silicon Carbide Semiconductor Technologies
- Semiconductor Quantum Structures and Devices
- Metamaterials and Metasurfaces Applications
- Antenna Design and Analysis
- Advancements in Semiconductor Devices and Circuit Design
- Microfluidic and Bio-sensing Technologies
- Conducting polymers and applications
- Organometallic Compounds Synthesis and Characterization
- Microwave Engineering and Waveguides
- Microfluidic and Capillary Electrophoresis Applications
- Advanced Antenna and Metasurface Technologies
- Thin-Film Transistor Technologies
- Silicon and Solar Cell Technologies
- Asymmetric Synthesis and Catalysis
- Electrostatic Discharge in Electronics
- HVDC Systems and Fault Protection
- Silicon Nanostructures and Photoluminescence
- Electromagnetic Compatibility and Noise Suppression
Guangxi Academy of Agricultural Science
2024-2025
Wuhan University of Technology
2024
Zhongnan Hospital of Wuhan University
2024
Wuhan University
2024
Ji Hua Laboratory
2020-2024
Fujian Institute of Research on the Structure of Matter
2024
Jilin University
2013-2023
China Academy of Engineering Physics
2018-2023
Chinese Academy of Sciences
2023
Crosslight Software (Canada)
2011-2023
Abstract Thermally activated delayed fluorescence (TADF) materials that are able to realize electroluminescence showing simultaneously narrow emission band, high color purity, and efficiency highly demanded for display applications. Up now, a few blue emissive TADF with such characteristics have been reported, while green features extremely scarce. Herein, two compounds efficient narrowband bluish green/green (full‐width at half‐maximum (FWHM): 22 21 nm in toluene) induced by multiple...
Abstract The design and synthesis of organic materials with a narrow emission band in the longer wavelength region beyond 510 nm remain great challenge. For constructing narrowband green emitters, we propose unique molecular strategy based on frontier orbital engineering (FMOE), which can integrate advantages twisted donor–acceptor (D‐A) structure multiple resonance (MR) delayed fluorescence skeleton. Attaching an auxiliary donor to MR skeleton leads novel molecule D‐A characteristics....
Abstract The development of efficient red thermally activated delayed fluorescence (TADF) emitters with an emission wavelength beyond 600 nm remains a great challenge for organic light‐emitting diodes (OLEDs). Herein, two pairs isomers are designed and synthesized by attaching electron‐donor 9,9‐diphenyl‐9,10‐dihydroacridine (DPAC) moiety to the different positions kinds highly rigid planar acceptor cores (PDCN PPDCN). Their TADF efficiencies maxima (599–726 nm) regulated molecular isomer...
Abstract Multiple‐resonance (MR) organic emitters bearing small full‐width at half‐maximum (FWHMs) are of general interest in light‐emitting diodes. Indolo[3,2,1‐ jk ]carbazole (ICz) embedded MR‐fluorophors have demonstrated extremely FWHMs, yet the violet region with low electroluminescence efficiency. Herein, a strategic implementation ICz subunits into MR fluorophors is proposed by taking advantage synergetic effect para ‐positioned nitrogen atoms to enhance electronic coupling decrease...
Abstract In this study, two pairs of chiral thermally activated delayed fluorescence (TADF) materials enabling circularly polarized luminescence (CPL) named R / S ‐ p BAMCN (rod‐shape) and o (helix‐shape) are prepared based on a new pair donor (D*), N 2 , ′‐diphenyl‐[1,1′‐binaphthalene]‐2,2′‐diamine ( BAM ), cyano (CN) acceptors. Due to the rigid molecular structure special intramolecular arrangement, TADF show high photoluminescence quantum efficiency (up 0.86) with narrow full‐width at...
Abstract Recently, owing to the great structural tunability, excellent photothermal property, and strong photobleaching resistance, organic‐small‐molecule materials are proposed as promising solar absorbent materials. Herein, through fusing two electron‐withdrawing units dibenzo[ f , h ]quinoxaline anthraquinone units, a rigid planar acceptor c ]naphtho[2,3‐ ]phenazine‐8,13‐dione (PDN) with stronger ability is obtained used construct donor–acceptor‐type solar‐energy‐absorbing material,...
Two AIE-type emitters that can realize efficient deep-blue OLEDs with the CIE coordinates matching well standard blue-light coordinate of (0.14, 0.08) have been designed and synthesized.
Abstract The design and synthesis of organic materials with a narrow emission band in the longer wavelength region beyond 510 nm remain great challenge. For constructing narrowband green emitters, we propose unique molecular strategy based on frontier orbital engineering (FMOE), which can integrate advantages twisted donor–acceptor (D‐A) structure multiple resonance (MR) delayed fluorescence skeleton. Attaching an auxiliary donor to MR skeleton leads novel molecule D‐A characteristics....
The increasing demand for high-performance organic light-emitting devices (OLEDs) based on thermally-activated delayed fluorescence (TADF) principle urgently requires to establish an efficient preparation strategy of TADF materials. Although considerable progress has been made in molecular design approaches materials, it still remains unaddressed issue how aggregated states or supramolecular structures determine the property solids. Herein, we present molecule...
Abstract Pure organic room‐temperature phosphorescence (RTP) materials are considered as potential candidates for replacing precious metal complexes to fabricate highly efficient light‐emitting devices (OLEDs). However, applications of the reported RTP in OLEDs seriously impeded by their low photoluminescence quantum yields (PLQYs) a thin film state. To overcome these obstacles, we established new strategy construct based on pure material sensitized fluorescence emitter selecting...
The 4OCSPC solid has a wide absorption range from 300 to 1000 nm and the solar-thermal conversion efficiency is evaluated be 17.3%, which can attain superior water purification electricity generation performances.
Abstract The development of red organic emissive materials with high‐efficiency and low‐cost is great significance but formidable challenge for light‐emitting diodes (OLEDs). Herein, through isomer engineering, a pair thermally activated delayed fluorescence (TADF) isomers Y‐shape cruciform structures, namely TPA‐APQDCN‐Y TPA‐APQDCN‐C, are developed by integrating two triphenylamine (TPA) donor moieties into different positions rigid planar acenaphtho[1,2‐b]quinoxaline‐9,10‐dicarbonitrile...
A new type of donor–acceptor cyclopropane with gem -difluorine as an unconventional donor group undergoes (3 + 2)-cycloadditions various aldehydes/ketones, affording densely functionalized -difluorotetrahydrofurans.
We report real-time observation of the interlayer shearing mode, corresponding to lateral oscillation graphene planes, for bi- and few-layer graphene. Using a femtosecond pump–probe technique, we have followed coherent oscillations this vibrational mode directly in time domain. The shearing-mode frequency, as expected an exhibits strong systematic dependence on number layers, varying from 1.32 THz bulk limit 0.85 bilayer explored role interactions with external environment by comparing...
We propose a strategy to construct deep blue emission molecules based on the concept of nonsymmetrical connection two identical π-conjugated groups. It was demonstrated that indeed resulted in separation highest occupied molecular orbital (HOMO) and lowest unoccupied (LUMO) formation donor–acceptor (D–A) structure. For D–A constructed by groups, degree charge transfer is weaker easily achieved. Two (PIpPI PImPI) were synthesized employing diphenyl-phenanthroimidazole (PI) as building block....
A class of novel donor–acceptor orange-red to red thermally activated delayed fluorescence (TADF) emitters with a maximum external quantum efficiency (EQE) up 26.0% and extremely low roll-off have been designed synthesized.
Abstract The design and synthesis of one‐compound‐based white light organic solids that can be employed to fabricate efficient light‐emitting devices (OLEDs) still remains a challenge. In this contribution, classic donor–acceptor (D‐A) type molecule (PTZ‐BP) is presented, which composed phenothiazine (PTZ) as an electron donor benzophenone (BP) acceptor. Intriguingly, PTZ‐BP displays dual emission thermally activated delayed fluorescence properties. Its originates from locally excited state...
B–N-containing emitter based MR-TADF OLEDs exhibiting a narrowband sky-blue emission with the FWHM of 29 nm, maximum EQE 31.0% and low efficiency roll-off were achieved by molecular regulation device optimization.
We present the growth, spectroscopy, continuous-wave (CW) and passively mode-locked (ML) operation of a novel "mixed" tetragonal calcium rare-earth aluminate crystal, Yb
Abstract The synthetically useful functionalized 2‐substituted piperidines containing a lateral ketone group have been strategically accessed via an organocatalytic enantioselective intramolecular aza‐Michael addition of enone carbamates, in which novel internal substrate combination the moiety as Michael acceptor and carbamate donor was revealed asymmetric bifunctional organocatalysis. This heteroatom conjugate addition, realized by using catalytic chiral Cinchona ‐based primary‐tertiary...