A5009819154- Organic Light-Emitting Diodes Research
- Luminescence and Fluorescent Materials
- Organic Electronics and Photovoltaics
- Photochemistry and Electron Transfer Studies
- Conducting polymers and applications
- Perovskite Materials and Applications
- Image and Signal Denoising Methods
- Lanthanide and Transition Metal Complexes
- Advanced Image Fusion Techniques
- Semiconductor Quantum Structures and Devices
- Quantum Dots Synthesis And Properties
- Remote-Sensing Image Classification
- Luminescence Properties of Advanced Materials
- Photoreceptor and optogenetics research
- Image Processing Techniques and Applications
- 3D Surveying and Cultural Heritage
- Medical Imaging and Analysis
- Molecular Sensors and Ion Detection
- Advanced Image Processing Techniques
- Synthesis and Properties of Aromatic Compounds
- Radiation Dose and Imaging
- Scoliosis diagnosis and treatment
- Analytical Chemistry and Sensors
- COVID-19 diagnosis using AI
- Digital Imaging for Blood Diseases
Changzhou University
2019-2024
Shandong Normal University
2005-2024
Suzhou University of Science and Technology
2024
Nanjing University
2024
Macau University of Science and Technology
2022-2024
Qufu Normal University
2023-2024
Ningbo University Affiliated Hospital
2023-2024
Taiyuan University of Technology
2023-2024
Qingdao University of Science and Technology
2022
Materials Science & Engineering
2021
Abstract Ultraviolet (UV) organic emitters that can open up applications for future light‐emitting diodes (OLEDs) are of great value but rarely developed. Here, we report a high‐quality UV emitter with hybridized local and charge‐transfer (HLCT) excited state its application in OLEDs. The emitter, 2BuCz‐CNCz, shows the features low‐lying locally (LE) emissive high‐lying reverse intersystem crossing (hRISC) process, which helps to balance color purity exciton utilization OLED. Consequently,...
Aggregation-caused quenching (ACQ) has long been a problem that inhibits the application of organic light-emitting materials in diodes, especially near-infrared (NIR) materials. Figuring out reasons induce ACQ is important for quantum efficiency enhancement NIR In this paper, an molecule (TPA-QCN) with thermally activated delayed fluorescence (TADF) studied based on first-principles calculations and excited-state dynamics investigation both toluene aggregation state. Our calculation...
Organic materials with multi-stimulus response (MSR) properties have demonstrated many potential and practical applications. Herein, a π-stacked thermally activated delayed fluorescence (TADF) material properties, named SDMAC, was designed synthesized using distorted 9,9-dimethyl-10-phenyl-9,10-dihydroacridine as donor. SDMAC possesses rigid configuration intramolecular through-space interactions exhibits aggregation-induced emission enhancement (AIEE), solvatochromic, piezochromic,...
Near-infrared (NIR) thermally activated delayed fluorescence (TADF) materials have shown great application potential in organic light-emitting diodes, photovoltaics, sensors, and biomedicine. However, their efficiency (ΦF) is still highly inferior to those of conventional NIR fluorescent dyes, seriously hindering applications. This study aims provide theoretical guidance experimental verification for efficient NIR-TADF molecular design. First, the mechanism two deep-red TADF molecules...
Organic materials featuring intramolecular through-space charge transfer (TSCT) excited states are advantageous for efficient thermally activated delayed fluorescence (TADF), although the realization of multiple TSCT systems remains challenging. Herein, a rigid molecule with three-dimensional dislocated sandwich acceptor-donor-acceptor configuration has been developed by linking biphenazine (2PXZ) donor and 2,4,6-triphenyl-1,3,5-triazine (TRZ) acceptor through twin-locking two spiro-fluorene...
Artificial lighting consumes almost one-fifth of global electricity. As an efficient solid-state technology, white light-emitting diodes (WLEDs) have received increasing attention. However, the luminescence traditional WLEDs comes from multi-component emitters, which leads to complex device structure and unstable emitting color. Therefore, developing single-component materials with white-light electroluminescence is significance for artificial applications. Here, we fabricate devices based...
Abstract Organic light‐emitting diodes (OLEDs) based on thermally activated delayed fluorescence (TADF) materials are promising for the realization of highly efficient emitters. However, severe efficiency roll‐off at high brightness still remains as a huge challenge TADF‐based OLEDs. Herein, rod‐like orange‐red TADF emitters 2BNCz‐PZ and 2BNtCz‐PZ with acceptor‐donor‐acceptor (A‐D‐A) configuration developed by bearing dihydrophenazine donor discoidal rigid boron, nitrogen‐contained...
The introduction of different donors at the para -carbon position BNCz core modulates predominance locally excited (LE)/charger transfer (CT) states TADF materials to achieve full-color emission.
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...
A deep blue TADF emitter composed of rigid D and units was developed. BOC-PSi-based OLED exhibited not only an impressive EQE max approaching 20%, but also a superior color purity the Rec.2020 standard.
The positive impact of chromophore flexibility on the efficiency TADF materials was demonstrated due to low reorganization energy and large transition dipole moment.
A QM/MM study on through space charge transfer (TSCT)-based thermally activated delayed fluorescence (TADF) molecules with sky-blue emission.
The harvesting of 'hot' triplet excitons through high-lying reverse intersystem crossing mechanism has emerged as a hot research issue in the field organic light-emitting diodes. However, if materials lack capability to convert 'cold' T1 into singlet ones, actual maximum exciton utilization efficiency would generally deviate from 100%. Herein, comparative studies on two naphthalimide-based compounds CzNI and TPANI, we revealed that can be utilized effectively triplet-triplet...
Thermally activated delayed fluorescence (TADF) molecules with deep red luminescence have shown great applications in organic light-emitting diodes (OLEDs). However, the development of high efficient TADF emitters is full resistance, and new design strategies are highly desired. This work theoretically predicts properties photophysical mechanism a spiro-acridine based molecule DBPz-2spAc toluene aggregation states. Experiments further show that solid state can effectively suppress...
Azaacenes, which have been known for a long time, are of scientific and practical importance in organic electronics. Azaacenes once shone as the luminophore light-emitting diodes (OLEDs). However, due to low exciton utilization efficiency and/or aggregation induced quenching (ACQ) effect, N-heteroacene based OLEDs generally showed inferior device performance. In this work, azaacene has revisited applied an acceptor red fluorophore (AZA-TPA), where judicious connection pattern between donor...
Thermally activated delayed fluorescence (TADF) emitters based on multiple resonance (MR) effects are promising for high-definition organic light-emitting diodes (OLEDs) with narrowband emission and high efficiency. However, they still face the challenges of aggregation-caused quenching (ACQ) spectral broadening. Solution-processable MR-TADF an external quantum efficiency (EQE) >20% a full width at half-maximum (fwhm) <30 nm have rarely been reported. To construct ACQ-resistant without...
In account of the energy gap law, development efficient narrow-band thermally activated delayed fluorescence (TADF) materials remains a major challenge for application organic light-emitting diodes (OLEDs). The orange-red TADF are commonly designed with either large π-conjugated systems or strong intramolecular donor–acceptor (D–A) interactions red-shift emission and small singlet–triplet (ΔEST). There rare reports on simultaneous incorporation these two strategies same material systems....
A bipolar transport compound, 2,5-bis(4-(9-(2-ethylhexyl)-9H-carbazol-3-yl)phenyl)-1,3,4-oxadiazole (CzOXD), incorporating both electron- and hole-transport functionalities, was synthesized fully characterized by 1H NMR, 13C elemental analysis mass spectrometry. Its thermal, electrochemical, electronic absorption photoluminescent properties were studied. The atomic force microscopy images indicate that smooth homogeneous films can be obtained spin-coating from a chloroform solution of...
The synthesis of supramolecualr phosphorescent polymers (SPPs) as a novel class solution-processable electroluminescent (EL) emitters was presented. SPPs were formed by utilizing the efficient nonbonding self-assembly luminescent iridium monomer 1 and "terfluorenyl"-based monomers 2 3, tethered with either crown ether or dibenzylammonium unit. supramolecular assembly process monitored illustrated 1H nuclear magnetic resonance (NMR) viscosity measurement. Moreover, exhibit an intrinsic glass...
Near-infrared thermally activated delayed fluorescence (NIR-TADF) materials with emission over 700 nm have been insufficiently investigated mainly due to the limited choice of strong donor/acceptor units for molecular construction and electronic coupling between donors acceptors. Herein, a novel D-A1-A2-A3 configuration was developed design NIR-TADF material (TPA-CN-N4-2PY), in which three types sub-acceptor (CN: cyano; N4: dipyrido[3,2-a:2',3'-c]phenazine; PY: pyridine) were incorporated...
Organic room temperature phosphorescence (RTP) has been widely investigated to realize long-lifetime luminescent materials and improvement in their efficiency is a key focus of research, especially for red near-infrared (NIR) RTP molecules.