A5100447215- Organic Light-Emitting Diodes Research
- Luminescence and Fluorescent Materials
- Organic Electronics and Photovoltaics
- Molecular Sensors and Ion Detection
- Conducting polymers and applications
- Thin-Film Transistor Technologies
- Lanthanide and Transition Metal Complexes
- Perovskite Materials and Applications
- Advanced Proteomics Techniques and Applications
- Advanced biosensing and bioanalysis techniques
- Analytical Chemistry and Sensors
- Photochemistry and Electron Transfer Studies
- Mass Spectrometry Techniques and Applications
- Sulfur Compounds in Biology
- Spectroscopy and Laser Applications
- Advanced Nanomaterials in Catalysis
- Genetic Associations and Epidemiology
- Carbon and Quantum Dots Applications
- Molecular Junctions and Nanostructures
- ZnO doping and properties
- Copper-based nanomaterials and applications
- Nanocluster Synthesis and Applications
- Luminescence Properties of Advanced Materials
- Pesticide Exposure and Toxicity
- Advanced Chemical Sensor Technologies
Jilin University
2016-2025
State Key Laboratory of Supramolecular Structure and Materials
2016-2025
Jiangsu University of Science and Technology
2024-2025
Beijing General Research Institute of Mining and Metallurgy
2025
State Key Laboratory of Mineral Processing
2025
Beijing University of Chemical Technology
2012-2024
Soochow University
2017-2024
University at Buffalo, State University of New York
2014-2024
Jilin Medical University
2013-2024
Center for Excellence in Education
2014-2024
Triplet harvesting is a main challenge in organic light-emitting devices (OLEDs), because the radiative decay of triplet spin-forbidden. Here, we propose new kind OLED, which an open-shell molecule, (4-N-carbazolyl-2,6-dichlorophenyl)bis(2,4,6-trichlorophenyl)methyl (TTM-1Cz) radical, used as emitter, to circumvent transition problem triplet. For TTM-1Cz, there only one unpaired electron highest singly occupied molecular orbital (SOMO). When this excited lowest unoccupied (SUMO), SOMO empty....
Abstract A novel thermally activated delayed fluorescence (TADF) emitter 12,15‐di(10 H ‐phenoxazin‐10‐yl)dibenzo[ a , c ]dipyrido[3,2‐ h :2′,3′‐ j ]phenazine (DPXZ‐BPPZ) is developed for highly efficient red organic light‐emitting diode (OLED). With rigid and planar constituent groups evident steric hindrance between electron‐donor (D) electron‐acceptor (A) segments, DPXZ‐BPPZ realizes extremely high rigidity to suppress the internal conversion process. Meanwhile, twisted structure D...
Two novel thermally activated delayed fluorescence (TADF) emitters, 3-phenylquinolino[3,2,1- de]acridine-5,9-dione (3-PhQAD) and 7-phenylquinolino[3,2,1- (7-PhQAD), were designed synthesized based on a rigid quinolino[3,2,1- (QAD) framework. With the effective superimposed resonance effect from electron-deficient carbonyls electron-rich nitrogen atom, both emitters realize significant TADF characteristics with small Δ ESTs of 0.18 0.19 eV, respectively. And, molecular relaxations...
Abstract Developing red thermally activated delayed fluorescence (TADF) emitters for high‐performance OLEDs is still facing great challenge. Herein, three TADF emitters, pDBBPZ‐DPXZ, pDTBPZ‐DPXZ, and oDTBPZ‐DPXZ, are designed synthesized with same donor–acceptor (D‐A) backbone different peripheral groups attaching on the A moieties. Their lowest triplet states change from locally excited to charge transfer character leading significantly enhance reverse intersystem crossing process. In...
Abstract Biogenic amines (BAs) are important indicators for the evaluation of food spoilage and disease diagnosis. Thus, detection BAs with high practical potential is great importance. In this work, a new fluorescent probe design strategy proposed by intramolecular charge transfer (ICT) enhancement probes, which induced hydrogen bond interaction between probes analyte. The T1 T2 donor–acceptor structure not only present 140 nm bathochromic‐shifted emission, ultrafast responses (15 s 25 ),...
The operational stability of polymer solar cells is a critical concern with respect to the thermodynamic relaxation acceptor-donor-acceptor (A-D-A) or A-DA'D-A structured small-molecule acceptors (SMAs) within their blends donors. Giant molecule (GMAs) bearing SMAs as subunits offer solution this issue, while classical synthesis via Stille coupling suffers from low reaction efficiency and difficulty in obtaining mono-brominated SMA, rendering approach impractical for large-scale low-cost...
Polymer solar cells (PSCs) rely on a blend of small molecular acceptors (SMAs) with polymer donors, where thermodynamic relaxation SMAs poses critical concerns operational stability. To tackle this issue, tethered SMAs, wherein multiple SMA-subunits are connected to the aromatic-core via flexible chains, proposed. This design aims an elevated glass transition temperature (T
The ultrasensitive differential scanning calorimetry is used to observe the glass transition in thin (1-400 nm) spin-cast films of polystyrene, poly (2-vinyl pyridine) and (methyl methacrylate) on a platinum surface. A pronounced observed even at thickness as small 1-3 nm. Using high heating (20-200 K/ms) cooling (1-2 K/ms region) rates which are typical for this technique, we do not appreciable dependence temperature over range from hundreds nanometers down 3 nm thick films. evolution...
A simple and scalable exfoliation approach is developed to produce high-quality single-layer graphene sheets without the use of toxic reduction agents expensive solvents. Graphite powders are exfoliated in a water solution pyrene derivatives, which act as dispersion agents, healing electric "glue" during thermal annealing process.
A novel fluorescent poly(2,7-carbazole) with a 4-[tris-(4-octyloxyphenyl)methyl]phenyl side chain is used to detect the explosive compounds TNT and DNT. It shows high recycled fluorescence quenching sensitivity, which due its strong electron donating ability weaker interaction between polymer chains caused by bulky chain.
Abstract A novel molecular model of connecting electron‐donating (D) and electron‐withdrawing (A) moieties via a space‐enough conjugation‐forbidden linkage (D‐Spacer‐A) is proposed to develop efficient non‐doped thermally activated delayed fluorescence (TADF) emitters. 10‐(4‐(4‐(4,6‐diphenyl‐1,3,5‐triazin‐2‐yl) phenoxy) phenyl)‐9,9‐dimethyl‐9,10‐dihydroacridine (DMAC‐ o ‐TRZ) was designed synthesized accordingly. As expected, it exhibits local excited properties in single‐molecule state as...
Owing to their natural thermally activated delayed fluorescence (TADF) characteristics, the development of exciplex emitters for organic light-emitting diodes (OLEDs) has witnessed booming progress in recent years. Formed between electron-donating and electron-accepting molecules, exciplexes with intermolecular charge transfer processes have unique advantages compared unimolecular TADF materials, offering a new way develop high-performance emitters. In this review, comprehensive overview is...
A green multiple resonance thermally activated delayed fluorescence (MR-TADF) emitter, <bold>DDiKTa</bold>, is developed by a simple dimerization strategy of the known MR-TADF emitter <bold>DiKTa</bold>.
In this work, we propose a novel concept to develop two fluorophores 2-(10H-phenothiazin-10-yl)thianthrene 5,5,10,10-tetraoxide (PTZ-TTR) and 2-(4-(10H-phenothiazin-10-yl)phenyl)thianthrene (PTZ-Ph-TTR) showing dual conformations for highly efficient single-emitter white organic light-emitting diodes (WOLEDs). Both molecules exist in stable conformations. Their nearly orthogonal forms own lower energy levels show thermally activated delayed fluorescence (TADF) characteristics, whereas their...
Efficient solution-processed exciplex OLEDs were developed by incorporating a novel small molecule electron-donor and utilizing the strategy of ternary exciplexes.
The development of high-performance solution-processed organic light-emitting diodes (OLEDs) remains a challenge. An effective solution, highlighted in this work, is to use highly efficient thermally activated delayed fluorescence (TADF) dendrimers as emitters. Here, the design, synthesis, density functional theory (DFT) modeling, and photophysics three triazine-based dendrimers, tBuCz2pTRZ, tBuCz2mTRZ, tBuCz2m2pTRZ, reported, which resolve conflicting requirements achieving simultaneously...
Red electrophosphorescence from light-emitting devices based on two rhenium(I) diimine complexes, (4,4′-dimethyl formate-2,2′-bipyridine)Re(CO)3Cl (dmfbpy-Re) and (4,4′-dibutyl (dbufbpy-Re), is reported. N, N′-di-1-naphthyl-N, N′-diphenylbenzidine used as the hole-transporting layer. 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline, bathocuproine to confine excitons within luminescence zone. dmfbpy-Re dbufbpy-Re are doped into host materials (4,4′-N-N′-dicarbazole)biphenyl with mass ratios of...
Abstract Triplet harvesting is a main challenge in organic light‐emitting devices (OLEDs), because the radiative decay of triplet spin‐forbidden. Here, we propose new kind OLED, which an open‐shell molecule, (4‐ N ‐carbazolyl‐2,6‐dichlorophenyl)bis(2,4,6‐trichlorophenyl)methyl (TTM‐1Cz) radical, used as emitter, to circumvent transition problem triplet. For TTM‐1Cz, there only one unpaired electron highest singly occupied molecular orbital (SOMO). When this excited lowest unoccupied (SUMO),...
Luminescent radicals have various applications because they simultaneously possess optoelectronic, electronic, and magnetic properties. Despite the development of some luminescent tris(2,4,6-trichlorophenyl)methyl (TTM)-based radicals, all substituents directly attached to TTM skeleton are electron-donating groups. Herein, electron-withdrawing group is first a p carbon parent radical, two novel stable open-shell adducts based on benzimidazole unit with red-orange emission obtained. Their...