A5034745704- Organic Light-Emitting Diodes Research
- Organic Electronics and Photovoltaics
- Luminescence and Fluorescent Materials
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Conducting polymers and applications
- Perovskite Materials and Applications
- Plant Stress Responses and Tolerance
- Quantum Dots Synthesis And Properties
- Heavy metals in environment
- Radiation Detection and Scintillator Technologies
- Metal-Organic Frameworks: Synthesis and Applications
- Advanced NMR Techniques and Applications
- Solid-state spectroscopy and crystallography
- Covalent Organic Framework Applications
- Microplastics and Plastic Pollution
- Advanced Photocatalysis Techniques
- Advanced Nanomaterials in Catalysis
- Bamboo properties and applications
- Particle Detector Development and Performance
- Thin-Film Transistor Technologies
- CCD and CMOS Imaging Sensors
- Lanthanide and Transition Metal Complexes
- Aluminum toxicity and tolerance in plants and animals
- Climate Change Policy and Economics
Hunan University of Science and Technology
2025
Soochow University
2024-2025
First Affiliated Hospital of Soochow University
2024-2025
Shanghai Jiao Tong University
2025
Sichuan Agricultural University
2020-2024
Linköping University
2023-2024
Tianjin Medical University
2020-2023
South China University of Technology
2015-2023
Ludong University
2022-2023
Hangzhou Normal University
2021-2023
Abstract The vast market demands for applications of organic light‐emitting diodes (OLEDs) have quickened the pace search future high‐performance materials, emphasizing importance exploring blue which determine performance bottleneck OLEDs. Moreover, actualizing highly efficient, pure‐blue, stable, and purely electroluminescence will pave way toward realization cost‐effective, high‐quality, long‐lasting commercialized OLED displays illumination applications. Without aid noble heavy metal...
Two novel evaporation- and solution-process-feasible thermally activated delayed fluorescence emitters, green-light-emission ACRDSO2 yellow-light-emission PXZDSO2, based on a brand-new electron-acceptor moiety thianthrene-9,9',10,10'-tetraoxide, are developed for organic light-emitting diodes. The solution-processed devices, without any hole-transport layer, exhibit competitive performance reduced efficiency roll-off compared with corresponding vacuum-deposited devices.
Issues concerning excited state lifetime (τTADF) tuning of thermally activated delayed fluorescence (TADF) materials are critical for organic light emitting diode (OLED) applications and other specific fields. For TADF-OLEDs, employing emitters with a short τTADF gives rise to suppressed singlet-triplet annihilation (STA) triplet-triplet (TTA), leading reduced efficiency roll-off at practical relevant brightness (100 1000 cd m-2 display illumination applications, respectively). Through...
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...
Highly efficient organic light-emitting diodes are in urgent demand applications of new generation full-color displays and solid-state lighting sources. The limitation device performance is greatly affected by extrinsic intrinsic elements the light out-coupling process. By elaborately designing emitters as sticklike molecules, horizontal orientation ratios range 86–93% were realized to intrinsically increase factor electroluminescence devices. These elongated compounds inclined lie parallel...
Two thioxanthone‐derived isomeric series of thermally activated delayed fluorescence (TADF) emitters 1,6‐2TPA‐TX/3,6‐2TPA‐TX and 1,6‐2TPA‐TXO/3,6‐2TPA‐TXO are developed for organic light‐emitting diodes (OLEDs). Blue emission devices based on symmetrical 3,6‐2TPA‐TX with common vertical transition route realize an extremely high external quantum efficiency (EQE) 23.7%, ever highest EQE 24.3% is achieved yellow 3,6‐2TPA‐TXO by solely changing the sulfur atom valence state thioxanthone core....
Highly efficient organic thermally activated delayed fluorescence (TADF) and room-temperature phosphorescence (RTP) emitters for light-emitting diodes (OLEDs) generally consist of a twisted donor-acceptor skeleton with aromatic amine donors. Herein, through introducing sulfur atoms into isomeric pentaphene pentacene frameworks, we demonstrate set polycyclic luminophores exhibiting TADF RTP characters. The incorporation confirms folded molecular plane, while intensifies singlet-triplet...
A barely reached balance between weak intramolecular‐charge‐transfer (ICT) and small singlet–triplet splitting energy (ΔE ST ) for reverse intersystem crossing from non‐emissive triplet state to radiative singlet impedes the realization of deep‐blue thermally activated delayed fluorescence (TADF) materials. By discarding twisted‐ICT framework a flattened molecular backbone introducing strong acceptor possessing n–π* transition character, hypsochromic color, large rate (k F ), ΔE are achieved...
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...
A chromaticity-adjustable yellow thermally activated delayed fluorescence (TADF) material, PXZDSO2 as a triplet harvester provides rational device concept, giving two-color and three-color pure organic white light-emitting diodes (WOLEDs) with unprecedented color-rendering index of 95 external quantum efficiency 19.2%. As service to our authors readers, this journal supporting information supplied by the authors. Such materials are peer reviewed may be re-organized for online delivery, but...
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...
Fluorescent organic light-emitting diodes capable of radiative utilization both singlet and triplet excitons are achieved via a simple double-layer planar pn heterojunction configuration without conventional emission layer, leading to high external quantum efficiency above 10% extremely low driving voltages close the theoretical minima. As service our authors readers, this journal provides supporting information supplied by authors. Such materials peer reviewed may be re-organized for...
Abstract Actualizing highly efficient solution‐processed thermally activated delayed fluorescent (TADF) organic light‐emitting diodes (OLEDs) at high brightness becomes significant to the popularization of purely electroluminescence. Herein, a soluble emitter benzene‐1,3,5‐triyltris((4‐(9,9‐dimethylacridin‐10(9 H )‐yl)phenyl)methanone was developed, yielding fluorescence rate ( k TADF > 10 5 s −1 ) ascribed multitransition channels and tiny singlet–triplet splitting energy (Δ E ST ≈ 32.7...
Two novel naphtho[1,2‐ d ]imidazole derivatives are developed as deep‐blue, light‐emitting materials for organic diodes (OLEDs). The 1 H ‐naphtho[1,2‐ based compounds exhibit a significantly superior performance than the 3 ‐naphtho[1,2‐d]imidazole analogues in single‐layer devices. This is because they have much higher capacity direct electron‐injection from cathode compared to their isomeric counterparts resulting ground‐breaking EQE (external quantum efficiency) of 4.37% and low turn‐on...
Thioxanthone derivatives consisting of undecorated carbazole as an electron donor and thioxanthone (TXO) or 9H-thioxanthen-9-one-S,S-dioxide (SOXO) acceptor in a donor-acceptor (D-A) donor-acceptor-donor (D-A-D) structure were developed thermally activated delayed fluorescence emitters to fabricate highly efficient fluorescent organic light emitting diodes. Their emission color was successfully tuned from blue yellow by changing the sulfur atom valence state unit tune intramolecular charge...
Strategies for developing purely organic materials exhibiting both high efficiency and persistent room-temperature phosphorescence (RTP) have remained ambiguous challenging. Herein, we propose that introducing an intermediate charge transfer (CT) state into the donor–acceptor binary molecular system holds promise accomplishing this goal. Guest showing gradient ionization potentials were selected to fine-tune intermolecularly formed CT when doped same host material with a large electron...
Biomacromolecules such as enzymes and proteins with bactericidal activity are promising for antibacterial applications in a mild, biocompatible, environmentally friendly manner. However, low efficiency has hindered its applications. Nanobiohybrids, constructed from biomacromolecules functional nanomaterials, could enhance the function of biomacromolecules. incompatibility between biological components nanomaterials is still major challenge designing nanobiohybrids. Here, we rationally design...
Fast spin-flipping is the key to exploit triplet excitons in thermally activated delayed fluorescence based organic light-emitting diodes toward high efficiency, low efficiency roll-off and long operating lifetime. In common donor-acceptor type molecules, distribution of dihedral angles film state would have significant influence on photo-physical properties, which are usually neglected by researches. Herein, we find that excited lifetimes emitters subjected conformation distributions...
Abstract High‐quality hosts are indispensable for simultaneously realizing stable, high efficiency, and low roll‐off blue solution‐processed organic light‐emitting diodes (OLEDs). Herein, three solution processable bipolar with successively reduced triplet energies approaching the T 1 state of thermally activated delayed fluorescence (TADF) emitter developed evaluated high‐performance OLED devices. The smaller energy gap between host guest allows quenching long‐lived excitons to reduce...
Efficient Förster energy transfer process from TADF assistant hosts to fluorescent dye affords efficient solution-processed red OLEDs with a maximum EQE of 8.0%.
Enhancing the rate of reverse intersystem crossing (krisc) and radiative transition (kr) has been regarded as key to improve molecular design strategy in field thermally activated delayed fluorescence (TADF) materials. Herein, two sky-blue donor–acceptor (D–A)-type TADF materials, namely, CzDCNPy tBuCzDCNPy, were designed following a controlling energy difference among charge-transfer singlet state (1CT), local exciton triplet (3LE), (3CT). Significantly different from most previously...
<italic>Via</italic>employing a unique universal host, highly efficient full-color, white phosphorescent and TADF OLEDs were achieved with simple unified structure.