A5052053978- Luminescence and Fluorescent Materials
- Organic Light-Emitting Diodes Research
- Organic Electronics and Photovoltaics
- Multiferroics and related materials
- Organoboron and organosilicon chemistry
- 2D Materials and Applications
- Conducting polymers and applications
- Magnetic and transport properties of perovskites and related materials
- Thermochemical Biomass Conversion Processes
- Subcritical and Supercritical Water Processes
- Catalysts for Methane Reforming
- Molecular Sensors and Ion Detection
- Perovskite Materials and Applications
- Advanced Condensed Matter Physics
- Synthesis and Properties of Aromatic Compounds
- MXene and MAX Phase Materials
- Lanthanide and Transition Metal Complexes
- CO2 Reduction Techniques and Catalysts
- Magneto-Optical Properties and Applications
- Crystallography and molecular interactions
- Electrocatalysts for Energy Conversion
- Chalcogenide Semiconductor Thin Films
- Ferroelectric and Piezoelectric Materials
- Catalytic Cross-Coupling Reactions
- Advanced Electrical Measurement Techniques
University of Science and Technology Beijing
2024-2025
Southern University of Science and Technology
2016-2024
Hong Kong Polytechnic University
2022-2024
Shenzhen University
2023-2024
Shenzhen Polytechnic
2022-2024
Chongqing University
2010-2023
Nanjing University of Posts and Telecommunications
2018-2022
University of Würzburg
2019-2021
The Synergetic Innovation Center for Advanced Materials
2018-2021
Zhejiang University of Technology
2021
Ferroelectric transition has been detected in a ferrimagnetic spinel oxide of CoCr2O4 upon the to conical spin order below 25 K. The direction [110] spontaneous polarization is normal both magnetization easy axis [001] and propagation transverse spiral component, accord with prediction based on spin-current model. reversal by small magnetic field (approximately 0.1 T) induces polarization, indicating clamping ferromagnetic ferroelectric domain walls.
Abstract Developing high-efficient afterglow from metal-free organic molecules remains a formidable challenge due to the intrinsically spin-forbidden phosphorescence emission nature of afterglow, and only few examples exhibit efficiency over 10%. Here, we demonstrate that can be enhanced dramatically by thermally activated processes release excitons on stabilized triplet state (T 1 * ) lowest singlet excited (S for spin-allowed emission. Designed in twisted donor–acceptor architecture with...
Abstract Triplet‐excited‐state‐involved photonic and electronic properties have attracted tremendous attention for next‐generation technologies. To populate triplet states, facile intersystem crossing (ISC) efficient exciton spin‐flipping is crucial, but it remains challenging in organic molecules free of heavy atoms. Here, a new strategy proposed to enhance the ISC purely optoelectronic using heteroatom‐mediated resonance structures capable promoting at large singlet–triplet splitting...
Abstract Multi‐resonance thermally activated delayed fluorescence (MR‐TADF) emitters have drawn considerable attention because of their remarkable optoelectronic properties high emission efficiency and narrow profile, represent an active subject cutting‐edge research in the organic electroluminescence (EL). However, slow reverse intersystem crossing (RISC) rate MR‐TADF emitter caused by large energy gap (Δ E ST ) small spin‐orbit coupling (SOC) matrix elements between singlet triplet excited...
Developing deep-blue thermally activated delayed fluorescence (TADF) emitters with both high efficiency and color purity remains a formidable challenge. Here, we proposed design strategy by integrating asymmetric oxygen-boron-nitrogen (O-B-N) multi-resonance (MR) unit into traditional N-B-N MR molecules to form rigid extended O-B-N-B-N π-skeleton. Three MR-TADF of OBN, NBN ODBN featuring O-B-N, symmetric units were synthesized through the regioselective one-shot electrophilic C-H borylation...
Efficient and stable blue organic light-emitting devices (OLEDs) represent one of the most important components in future solid-state lighting full color displays. Although red green OLEDs have been successfully commercialized, it remains challenging to realize showing high efficiency stability simultaneously, restricting their commercialization. Triplet–triplet annihilation (TTA)-based materials emerging as a new category electroluminescent or host with promising potential for highly...
Reducing the Pd loading on electrodes is critical in electrocatalytic hydrodechlorination (EHDC) of chlorinated organic compounds (COCs). The EHDC reaction COCs involves three steps: H* formation, adsorption, and dechlorination. It has been established that initial hydrogen evolution (HER) occurs Pd0 dechlorination steps occur Pd2+. A strategy proposed to design new by adding a reducible HER-active interlayer replace Pd0, fulfilling responsibility producing hydrogen, facilitate formation...
Achieving single-component white organic afterglow remains a great challenge owing to the difficulties in simultaneously supporting long-lived emissions from varied excited states of molecule for complementary afterglow. Here, an extraordinary tri-mode emission radiative decays singlet (S1 ), triplet (T1 and stabilized (T1* ) was proposed afford through modulating singlet-triplet splitting energy (ΔEST exciton trapping depth (ETD ). Low-lying T1 * yellow constructed by H-aggregation...
The development of highly efficient cyclometalated phosphorescent iridium(III) complexes is greatly promoted by their rational molecular design. Manipulating the excited states iridophosphors could endow them with appealing photophysical properties, which play vital roles in triplet state-related photofunctional applications (e.g., electroluminescence, photodynamic therapy, etc.). In general, most effective approach for decreasing emission energies to extend π-skeleton ligands. However,...
The excited-state manipulation of the phosphorescent iridium(III) complexes plays a vital role in their photofunctional applications. development molecular design strategy promotes creative findings novel complexes. current strategies for mainly depend on selective cyclometalation ligands with ion, which is governed by steric hindrance ligand during cyclometalation. Herein, new (i.e., random strategy) proposed effective cyclometalated Two series and separable methoxyl-functionalized isomeric...
Abstract Multi‐resonance thermally activated delayed fluorescence (MR‐TADF) molecules have attracted much attention in the academia owing to their unique photoelectrical properties. However, MR‐TADF emitters usually show slow reverse intersystem crossing (RISC) rate, resulting high efficiency roll‐off of organic light‐emitting diodes (OLEDs) and seriously limiting further development. Here, a peripheral selenium (Se) modification is presented for promote RISC process while keeping narrowband...
The optical magnetoelectric (ME) effect, i.e., the change of absorption upon reversal light propagation direction, has been investigated for a polar ferrimagnet GaFeO3. For dipole- and spin-forbidden d-d transition bands located at 1.2-2.3 eV, clear signal ME effect (Deltaalphat approximately 3x10(-3)) is observed with an applied magnetic field as low 500 Oe sample thickness (t) 50 microm. observation large in present compound suggests possible route to magnification this novel phenomenon...
Temperature (5--250 K) and magnetic-field (0--70 kOe) variations of the low-energy (1--10 meV) electrodynamics spin excitations have been investigated for a complete set light-polarization configurations ferroelectric magnet ${\text{DyMnO}}_{3}$ by using terahertz time-domain spectroscopy. We identify pronounced absorption continuum (1--8 with peak feature around 2 meV, which is electric-dipole active only light $E$ vector along $a$ axis. This band grows in intensity lowering temperature...
Monolayer W x Mo 1− S 2 ‐based field effect transistors are demonstrated for the first time on monolayer flake, which is grown by chemical vapor deposition method under an atmospheric pressure. Detailed material studies using Raman and photoluminescence measurements have been carried out as‐grown . Electronic band structure of has calculated first‐principle theory. The thermal stability evaluated Raman‐temperature measurement. Carrier transport study fabricated FETs analyzed...
Organic optoelectronic molecules with resonance effects are a striking class of functional materials that have witnessed booming progress in recent years. Various resonances induced by particularly constructed molecular structures can effectively influence key photophysical processes to afford particular properties the organic materials. The charge transport behaviors were tuned be dynamic and self-adaptive; emission spectra made very narrow high color purity; optical bandgaps significantly...
Homoleptic W(0) and Mo(0) complexes containing bis(triarylisocyanide) ligands with bulky substituents were synthesized spectroscopically characterized. Crystallographically determined structures revealed that these are hourglass-like in shape the tridentate adopting a facial coordination mode to metal center. These luminesce fluid solutions solid state. Typically toluene at 298 K, two display emission maximum (lifetime quantum yield) 591 nm (0.83 μs 0.35) 628 (1.04 0.39), similarly, it 575...
Abstract Using 4‐phenylpyridine or 2‐phenylpyridine in place of biphenyl, two electron‐poor phenylpyridyl‐fused boroles, [TipPBB1] 4 and TipPBB2 were prepared. adopts a unique coordination mode forms tetramer with cavity both the solid state solution. The boron center is 4‐coordinate but system dissociates solution, leading to 3‐coordinate borole species. Compared its borafluorene analogues, electron‐accepting ability largely enhanced by pyridyl group. exhibits dual fluorescence solution due...
An intermolecular locking strategy was proposed to improve both the solution processibility and photoluminescence efficiency of red TADF emitters for solution-processed OLEDs with an EQE up 8.2% roll-off 9.0% at 1000 cd m<sup>−2</sup>.
In this work, a design strategy for deep-blue multiresonance thermally activated delayed fluorescence (MR-TADF) molecules was developed by the fusion of weak O–B–N MR units and peripheral modification strong electron-donating diphenylamino group, resulting in hybrid long- short-range charge transfer excitation characteristics with accelerated properties. As proof-of-concept molecule, DOBN shows narrowband emission peaking at 438 nm small full width half-maximum (fwhm) 19 as well high...
Abstract Black phosphorus (BP) has emerged as a promising two-dimensional (2D) material for next generation transistor applications due to its superior carrier transport properties. Among other issues, achieving reduced subthreshold swing and enhanced hole mobility simultaneously remains challenge which requires careful optimization of the BP/gate oxide interface. Here, we report realization high performance BP transistors integrated with HfO 2 high- k gate dielectric using low temperature...