A5072302687- Organic Light-Emitting Diodes Research
- Organic Electronics and Photovoltaics
- Luminescence and Fluorescent Materials
- Conducting polymers and applications
- Carbon dioxide utilization in catalysis
- Analytical Chemistry and Chromatography
- Catalytic Cross-Coupling Reactions
- CO2 Reduction Techniques and Catalysts
- Asymmetric Hydrogenation and Catalysis
- Perovskite Materials and Applications
- Molecular Junctions and Nanostructures
- Advancements in Battery Materials
- Surface Modification and Superhydrophobicity
- Photonic and Optical Devices
- Analytical Chemistry and Sensors
- Radical Photochemical Reactions
- Meat and Animal Product Quality
- Hemoglobinopathies and Related Disorders
- Sulfur-Based Synthesis Techniques
- Magnesium Alloys: Properties and Applications
- Corrosion Behavior and Inhibition
- Advanced Combustion Engine Technologies
- Aluminum Alloys Composites Properties
- Iron Metabolism and Disorders
- Chemical Synthesis and Reactions
South China University of Technology
2015-2025
Key Laboratory of Guangdong Province
2025
Nantong University
2010-2024
Ningbo Institute of Industrial Technology
2021-2024
Chinese Academy of Sciences
2021-2024
University of Chinese Academy of Sciences
2021-2024
Xinjiang Agricultural University
2024
North University of China
2023
Guangxi University
2019-2022
Southwest Jiaotong University
2021
Blue thermally activated delayed fluorescence (TADF) emitters that can simultaneously achieve high efficiency in doped and nondoped organic light-emitting diodes (OLEDs) are rarely reported. Reported here is a strategy using tri-spiral donor for such versatile blue TADF emitters. Impressively, by simply extending the nonconjugated fragment molecular length, aggregation-caused emission quenching (ACQ) be greatly alleviated to as 90 % horizontal orientation dipole ratio external quantum...
To date, blue dual fluorescence emission (DFE) has not been realized because of the limited choice chemical moieties and severe geometric deformation DFE emitters leading to strong intramolecular charge transfer (ICT) with a large Stokes shift in excited states. Herein, an emitter (1'r,5'R,7'S)-10-(4-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl)-10H-spiro [acridine-9,2'-adamantane] (a-DMAc-TRZ) containing novel adamantane-substituted acridine donor is reported, which exhibits unusual DFE. The...
Abstract Designing thermally activated delayed fluorescence (TADF) materials with an efficient reverse intersystem crossing (RISC) process is regarded as the key to actualize organic light‐emitting diodes (OLEDs) low efficiency roll‐off. Herein, a novel molecular design strategy reported where typical TADF material 10‐phenyl‐10 H , 10′ ‐spiro[acridine‐9, 9′‐anthracen]‐10′‐one (ACRSA) utilized functional electron donor of 2,4,6‐triphenyl‐1,3,5‐triazine(TRZ)‐ p ‐ACRSA and TRZ‐ m ‐ACRSA. It...
A group of novel 2-(2′-hydroxyphenyl)benzothiazole derivatives (1–4) with excited-state intramolecular proton transfer (ESIPT) character were synthesized. Their photophysical properties studied by means steady-state absorption and fluorescence spectra time-resolved emission method as well theoretical calculation in a variety solvents. All these compounds can yield single at the green region nonpolar solvents such n-hexane, while dual consisting blue bands was captured strong polar like...
Thermally activated delayed fluorescence (TADF) emitters with a spiral donor show tremendous potential toward high-level efficient blue organic light-emitting diodes (OLEDs). However, the underlying design strategy of used for TADF remains unclear. As consequence, researchers often do "try and error" work in development new functional fragments, making it slow inefficient. Herein, we demonstrate that energy level relationships between luminophore lead to significant effect on...
Luminescent materials possessing a "hot-exciton" mechanism and aggregation-induced emission (AIE) qualities are well-suited for use as emitting in nondoped organic light-emitting diodes (OLEDs), particularly deep-red regions where their ground state singlet excited surfaces proximity, leading to the formation of multiple nonradiative channels. However, designing molecules that artificially combine hot-exciton AIE attributes remains formidable task. In this study, versatile strategy is...
Constructing organic near-infrared (NIR) luminescent materials to confront the formidable barrier of "energy gap law" remains challenging. Herein, two NIR thermally activated delayed fluorescence (TADF) molecules named T-β-IQD and TIQD were developed by connecting N,N-diphenylnaphthalen-2-amine triphenylamine with a novel electron withdrawing unit 6-(4-(tert-butyl)phenyl)-6H-indolo[2,3-b]quinoxaline-2,3-dicarbonitrile. It is confirmed NIR-TADF emitters concurrent aggregation-induced emission...
Herein, we propose a regional functionalization molecular design strategy that enables independent control of distinct pivotal parameters through different molecule segments. Three novel multiple resonances thermally activated delayed fluorescence (MR-TADF) emitters A-BN, DA-BN, and A-DBN, have been successfully synthesized by integrating highly rigid three-dimensional adamantane-containing spirofluorene units into the MR framework. These molecules form two distinctive functional parts: part...
A series of bipolar hosts, namely, 5-(2-(9H-carbazol-9-yl)-phenyl)-1,3-dipyrazolbenzene (o-CzDPz), 5-(3-(9H-carbazol-9-yl)-phenyl)-1,3-dipyrazolbenzene (m-CzDPz), 5-(9-phenyl-9H-carbazol-3-yl)-1,3-dipyrazolbenzene (3-CzDPz), and 5-(3,5-di(9H-carbazol-9-yl)-phenyl)-1,3-dipyrazolbenzene (mCPDPz), are developed for phosphorescent thermally activated delayed fluorescence (TADF) organic light-emitting diodes (OLEDs). They designed by selecting pyrazole as n-type unit carbazole p-type one. The...
By adjusting the <italic>para</italic>-, <italic>meta</italic>-, and <italic>ortho</italic>-linking styles of p-type n-type units, physical parameters bipolar host materials are regularly tuned to a large extent. The <italic>meta</italic>- <italic>ortho</italic>-linked isomer hosts exhibit excellent performance in blue phosphorescent thermally activated delayed fluorescence organic light-emitting diodes.
3-(1H-Pyrazol-1-yl)pyridine is used as electron-transporting unit to construct bipolar host materials o-CzPyPz, m-CzPyPz, and p-CzPyPz for application in phosphorescent organic light-emitting diodes (PhOLEDs). By varying the ortho-, meta-, or para-linking mode between n-type 3-(1H-pyrazol-1-yl)pyridine p-type carbazole on phenylene bridge, optoelectronic parameters are tuned large extent. The highly twisted o-CzPyPz has high triplet energy of 2.95 eV, while isomer with more coplanar...
A pivotal thermally activated delayed-fluorescence (TADF) emitter, DspiroAc-TRZ, was developed, and it exhibits greatly enhanced electroluminescence performance in nondoped organic light-emitting diodes (OLEDs) owing to the concurrent manipulation of aggregation behavior monomolecular structure. The delicate non-planar packing pattern DspiroAc-TRZ crystal can not only lead highly efficient solid-state luminescence but also form a loose intermolecular pattern, decreasing HOMO or LUMO overlaps...
Abstract Radiative exciton generation and light out‐coupling are two crucial factors for highly efficient organic light‐emitting diodes (OLEDs). Herein, a thermally activated delayed fluorescence (TADF) material DspiroS‐TRZ with high horizontal dipole ratio (HDR, Θ // = 82%) is utilized as the blue emitter well host an orange‐red TADF TPA‐AQ to fabricate white OLEDs. A synergetic orientation induction on transition moment of achieved by orientated DspiroS‐TRZ, resulting in HDR (Θ 96%)...
Abstract Multi‐resonance (MR) based organoboron emitters exhibiting high‐efficiency narrowband thermally activated delayed fluorescence (TADF) have become a critical material component for constructing high‐performance organic light‐emitting diodes (OLEDs) with high color purity and gamut. However, most of the MR‐TADF devices suffer from severe efficiency roll‐off at current density due to relatively large singlet–triplet splitting energy, long excited state lifetime, slow reverse...
Abstract Solely through‐space charge transfer (TSCT)‐type thermally activated delayed fluorescent (TADF) emitters exhibit low radiative decay rates (), while solely through‐bond (TBCT) type TADF generally suffer from reverse intersystem crossing (RISC) ( k RISC ). Here, PhCzSpiroS‐TRZ with versatile spiro‐heterocyclic architecture and an extra donor of 9‐phenyl‐9H‐carbazole are developed as emitter ideal host for TADF‐ TADF‐sensitized fluorescence (TSF) organic light‐emitting diodes (OLEDs)...
Despite multiple-resonance thermally activated delayed fluorescence (MR-TADF) emitters with small full-width at half maximum are attractive for wide color-gamut display and eye-protection lighting applications, their inefficient reverse intersystem crossing (RISC) process long exciton lifetime induce serious efficiency roll-off, which significantly limits development. Herein, a novel device concept of building highly efficient tricomponent exciplex multiple RISC channels is proposed to...
We report highly efficient single layer solution-processed blue small-molecule electrophosphorescent organic light-emitting diodes with iridium (III) bis[2-(4,6-difluorophenyl)-pyridinato-N,C2′]picolinate (FIrpic) doped into a wide-gap 9,9-bis[4-(3 c6-di-tert-butylcarbazol-9-yl)phenyl]fluorene (TBCPF) as the emission layer. An optimized device 1,3-bis[(4-tert-butylphenyl)-1,3,4-oxidiazolyl]phenylene electron-transporting component layer, electrophosphorescence peaked at 474nm from FIrpic,...
Molybdenum disulfide (MoS2) has attracted extensive research interest as a fascinating anode for sodium-ion batteries (SIBs) because of its high specific capacity 670 mA h g-1. However, unsatisfied cycling durability and poor rate performance are two barriers that hinder MoS2 practical application in SIBs. Herein, 3D interconnected with enlarged interlayer spacing epitaxially grown on 1D electrospinning carbon nanofibers (denoted MoS2@CNFs) was prepared flexible SIBs via l-cysteine-assisted...
The direct linking of dual n-type units is developed to design novel host materials for improved performance blue and green phosphorescent organic light-emitting diodes.
Low driving voltage and high power efficiency are basic requirements when practical applications of organic light emitting diodes (OLEDs) in displays lighting considered. Two novel host materials m-PyCNmCP 3-PyCNmCP incorporating cyanopyridine moiety as electron-transporting unit developed for use fac-tris(2-phenylpyridine)iridium(III) (Ir(ppy)3) based green phosphorescent OLEDs (PhOLEDs). Extremely low turn-on voltages 2.01 2.27 V realized, which even lower than the theoretical limit...