A5073878907- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Organic Light-Emitting Diodes Research
- Organic Electronics and Photovoltaics
- Luminescence and Fluorescent Materials
- Crystallography and molecular interactions
- Conducting polymers and applications
- Perovskite Materials and Applications
- Molecular Junctions and Nanostructures
- Thin-Film Transistor Technologies
- Lanthanide and Transition Metal Complexes
- Analytical Chemistry and Sensors
- Molecular Sensors and Ion Detection
- Advanced Sensor and Energy Harvesting Materials
- Supramolecular Chemistry and Complexes
- Photochemistry and Electron Transfer Studies
- Silicon and Solar Cell Technologies
- Innovative Microfluidic and Catalytic Techniques Innovation
- Advanced Fiber Laser Technologies
- Catalytic Cross-Coupling Reactions
- Green IT and Sustainability
- Semiconductor Quantum Structures and Devices
- Radical Photochemical Reactions
- Chemical Reactions and Mechanisms
- Sulfur-Based Synthesis Techniques
South China University of Technology
2018-2025
State Key Laboratory of Luminescent Materials and Devices
2017-2025
Chinese Academy of Sciences
1999-2016
Changchun Institute of Applied Chemistry
2008-2016
State Key Laboratory of Polymer Physics and Chemistry
2008-2016
Wuhan University
2011
Thermally activated delayed fluorescence (TADF) materials with through-space charge transfers (CT) have attracted particularly interest recently. However, the slow reverse intersystem crossing (RISC) and radiative decay always limit their electroluminescence performances. Herein, TADF molecules ortho-linked multiple donors-acceptor (ortho-Dn -A) motif are developed to create near-degenerate excited states for reinforcement of spin-orbit coupling. The incorporation both through-bond CT...
To achieve high electroluminescence efficiency, great efforts are devoted to enhancing photoluminescence quantum yield (ΦPL) and exciton utilization of luminescent molecule, while another important factor, light out-coupling efficiency (ηout), receives less attention in molecule design. Here, we focus on horizontal dipole orientation engineering the increase ηout external (ηext). A series tailor-made molecules consisting an electron-accepting carbonyl core plus double electron-donating...
The pursuit of ideal short-delayed thermally activated delayed fluorescence (TADF) emitters is hampered by the mutual exclusion a small singlet-triplet energy gap (ΔEST) and large oscillator strength (f). Here, attaching an multiresonance-acceptor onto sterically-uncrowded donor, we report TADF bearing hybrid electronic excitations with main donor-to-acceptor long-range (LR) auxiliary bridge-phenyl short-range (SR) charge-transfer characters, balancing ΔEST f. Moreover, incorporation dual...
A new bipolar tetraarylsilane derivative with both a sufficiently high triplet energy and high-lying highest occupied molecular orbital level is presented as an excellent host for the deep-blue phosphor. solution-processed FIr6-based phosphorescent organic light-emitting diode (PhOLED) realized efficiency low roll-off. Detailed facts of importance to specialist readers are published ”Supporting Information”. Such documents peer-reviewed, but not copy-edited or typeset. They made available...
We report the synthesis of novel amorphous fluorene-based fluorophores that have been end-capped with tetraphenylethene (TPE). Although in solid state show bright cyan fluorescence high (68%) photoluminescence quantum efficiency (PLQE), strong quenching is observed solution low PLQE values ranging from 0.3% to 2.1%. When were added a 90% water–THF solvent mixture nanoparticles formed, which was confirmed by Dynamic Light Scattering (DLS) and Atomic Force Microscopy (AFM). Subsequent...
Abstract Aggregation‐induced emission (AIE) materials are attractive for achieving highly efficient nondoped organic light‐emitting diodes (OLEDs) owing to their strong luminescence in the solid state. However, electroluminescence efficiency of most AIE‐based OLEDs remains low waste triplet excitons. Here, using theoretical calculations, photophysical dynamics, and magnetoluminescence measurements, spin conversion process is demonstrated between high‐lying state (T n ) lowest excited singlet...
Abstract In situ removable (ISR) solid additive can employ cold sublimation process to optimize active layer morphology for organic solar cells (OSCs), thus remaining unique potential. Herein, a feasible guideline is proposed discover new ISR 1‐bromo‐4‐chlorobenzene (CBB), whose removing time ( T R ) between those of reported additives 1,4‐dichlorobenzene (DCB) and 1‐chloro‐4‐iodobenzene (CIB). The CBB with moderate beneficial affording the optimal achieving highest power conversion...
Three AIE luminogens were successfully synthesized by the covalent incorporation of tetraphenylethene into dibenzosilole core, and their emission colours tuned through simple structural modifications.
Metal halide perovskites, a cost-effective class of semiconductos, hold great promise for display technologies that demand high-efficiency, color-pure light-emitting diodes (LEDs). Early research on three-dimensional (3D) perovskites showed low radiative efficiencies due to modest exciton binding energies. To inprove luminescence, reducing dimensionality or grain size has been common approach. However, dividing the perovskite lattice into smaller units may hinder carrier transport,...
Five novel organic conjugated derivatives containing multifraction twisted acene units have been synthesized and characterized. These compounds the model molecule 2-methyl-5,12-diphenyl-6:7,10:11-bisbenzotetracene emit strong blue light in diluted solution with quantum yields of 0.21-0.67, while solid state, except for 1,2,3,4,5,6-hexa(2-(5,12-diphenyl-6:7,10:11-bis(4'-tert-butylbenzo)tetracene))benzene, green luminance is seen. The experimental results also indicate that structure leads to...
Abstract Currently, much research effort has been devoted to improving the exciton utilization efficiency and narrowing emission spectra of ultraviolet (UV) fluorophores for organic light‐emitting diode (OLED) applications, while almost no attention paid optimizing their light out‐coupling efficiency. Here, we developed a linear donor‐acceptor‐donor (D–A–D) triad, namely CDFDB, which possesses high‐lying reverse intersystem crossing (hRISC) property. Thanks its integrated narrowband UV...
Abstract Anthracene‐ and pyrene‐based organic fluorescent molecules with hybridized local charge‐transfer (HLCT) process can achieve highly efficient exciton utilization through harvesting high‐lying triplet (T n , ≥ 2) excitons via reverse intersystem crossing (hRISC) compared to conventional molecules, but there exists a serious loss caused by internal conversion (IC) from T 1 .Nowadays, the stability difference between anthracene‐ HLCT materials in OLEDs is rarely understood. In this...
Marching toward next-generation ultrahigh-definition and high-resolution displays, the development of high-performance blue organic light-emitting diodes (OLEDs) with narrow emission high luminance is essential requires conceptual advancements in both molecular device design. Herein, a emitter reported that exhibits hot-exciton aggregation-induced characteristics, use it as sensitizer proposed triplet-triplet annihilation (TTA)-assisted hot-exciton-sensitized fluorescence (HSF) device,...
New luminescent materials with aggregation-induced delayed fluorescence are developed and used to fabricate efficient solution-processed OLEDs an extremely small efficiency roll-off.
An amorphous photoluminescent material based on a dithienylbenzothiadiazole structure has been used for the fabrication of organic red-light-emitting diodes. The synergistic effects electron-transport ability and exciton confinement emitting allow efficient pure-red-light-emitting devices without hole blocker.
Abstract Thermally activated delayed fluorescence (TADF) materials with through‐space charge transfers (CT) have attracted particularly interest recently. However, the slow reverse intersystem crossing (RISC) and radiative decay always limit their electroluminescence performances. Herein, TADF molecules ortho‐linked multiple donors‐acceptor (ortho‐D n ‐A) motif are developed to create near‐degenerate excited states for reinforcement of spin‐orbit coupling. The incorporation both through‐bond...
Abstract Aggregation‐induced emission (AIE) materials are attractive for the fabrication of high‐efficiency organic light‐emitting diodes (OLEDs) owing to “hot exciton” process by reverse intersystem crossing (hRISC) and high photoluminescence quantum yields (PLQY). However, internal conversion (IC) from high‐lying triplet excitation states (T n , n≥2) lower excited state n‐1 ) is inevitable, resulting in severe exciton losses. Herein, an effective device structure designed that reuses lost...
Abstract Due to the hydrophobic organic cations, quasi‐two‐dimensional (quasi‐2D) lead halide perovskite materials have shown better moisture resistance. However, inappropriate multiphase structure in quasi‐2D films seriously affects efficient transport of energy from low‐n domains high‐n domains, especially when prepared air. Herein, study develops 30% ± 10% humidity and studies their amplified spontaneous emission (ASE) properties. It can be seen that phase disproportionation air is...
Abstract Triplet‐triplet fusion (TTF) can effectively transfer triplet excitons to singlet energy level and exhibit good stability, making it widely used in blue fluorescence organic light emitting diodes (OLEDs) for practical application. However, the efficiency of resulting OLEDs is still fundamentally limited. Herein, this work introduces a hot exciton enhancement layer (EEL) between TTF emissive electron‐transporting first time. It be found that are greatly utilized by efficient EEL. As...
Abstract The development of lasing materials with weak pile‐up effect from triplet excitons, low threshold, and long operational lifetime is much significant for truly continuous wave operation electrically pumping organic lasers. However, most gain media has been verified to have extreme quenching excitons due its wide‐band distribution absorption spectrum. Here, it found that the phenanthroimidazole derivatives as congenital advantages on handling triplet's issues. A very amplified...
Abstract Stretchable organic photovoltaics (OPVs) are pivotal for advancing conformable electronics, yet achieving both efficient and intrinsically stretchable OPVs remains a significant challenge. The main issue is maintaining electronic mechanical properties under deformation. Here, ternary blend system, PTzBI‐oF:PYIT:EVA presented, incorporating ethylene‐vinyl acetate (EVA) to establish conjugated elastomeric dual‐network morphology. elastomer network dissipates applied stress, preserving...