A5059528020- Luminescence and Fluorescent Materials
- Organic Light-Emitting Diodes Research
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Organic Electronics and Photovoltaics
- Molecular Sensors and Ion Detection
- Conducting polymers and applications
- Layered Double Hydroxides Synthesis and Applications
- Perovskite Materials and Applications
- Advanced Photocatalysis Techniques
- Carbon and Quantum Dots Applications
- Analytical Chemistry and Sensors
- Molecular Junctions and Nanostructures
- Nanoplatforms for cancer theranostics
- Photochemistry and Electron Transfer Studies
- Crystallography and molecular interactions
- Metal-Organic Frameworks: Synthesis and Applications
- Graphene and Nanomaterials Applications
- Nanocluster Synthesis and Applications
- Covalent Organic Framework Applications
- Synthesis and Properties of Aromatic Compounds
- Porphyrin and Phthalocyanine Chemistry
- Supramolecular Self-Assembly in Materials
- Electrocatalysts for Energy Conversion
- Catalytic Processes in Materials Science
State Key Laboratory of Supramolecular Structure and Materials
2016-2025
Jilin University
2016-2025
Jilin Medical University
2014-2025
Yanshan University
2024
Xi'an University of Technology
2023-2024
Xi’an University
2023-2024
East China University of Science and Technology
2024
Shaanxi Normal University
2023
Nanjing Agricultural University
2023
Civil Aviation University of China
2023
The development of near-infrared (NIR) organic light-emitting diodes (OLEDs) is growing interest. Donor-acceptor (D-A) chromophores have served as an important class NIR materials for OLED applications. However, the external quantum efficiencies (EQEs) OLEDs based on conventional D-A are typically below 1 %. Reported herein a butterfly-shaped compound, PTZ-BZP. A PTZ-BZP film displayed strong fluorescence with emission peak at 700 nm, and corresponding efficiency reached 16 Remarkably, EQE...
In principle, the ratio (Φ) of maximum quantum efficiencies for electroluminescence (EL) to photoluminescence (PL) can be expected approach unity, if exciton (bound electron–hole pair) generated from recombination injected electrons and holes in OLEDs has a sufficiently weak binding energy. However, seldom are examples Φ > 25% reported because strongly bound excitons most organic semiconductors nature. Here, twisting donor–acceptor triphenylamine‐thiadiazol molecule (TPA‐NZP) exhibits...
Excited state characters and components play a decisive role in photoluminescence (PL) electroluminescence (EL) properties of organic light‐emitting materials (OLEDS). Charge‐transfer (CT) is beneficial to enhance the singlet exciton utilizations fluorescent OLEDs by an activated reverse intersystem crossing process, due minimized triplet energy splitting CT excitons. However, dominant component emissive significantly reduces PL efficiency such materials. Here, strategy carry out fine...
For a donor–acceptor (D–A) molecule, there are three possible cases for its low‐lying excited state (S 1 ): π–π* (a localized electronic state), charge‐transfer (CT) delocalized and mixed or hybridized of CT (named here as the local charge transfer (HLCT) state). The HLCT is an important design next‐generation organic light‐emitting diode (OLED) materials with both high photoluminescence (PL) efficiency large fraction singlet exciton generation in electroluminescence (EL). According to...
Pure organic persistent room-temperature phosphorescence (p-RTP) under ambient conditions is attractive but challenging due to the slow intersystem crossing process and susceptibility of triplet excitons. Fabrication pure RTP luminogens with simultaneously high efficiency ultralong lifetime still remains a daunting job, owing their conflicting requirements for T1 nature (n,π*) (π,π*) characteristics, respectively. Herein, group amide-based derivatives efficient p-RTP developed through...
A<italic>meta</italic>-linked donor–acceptor (D–A) structure was utilized to achieve high-efficiency and colour-purity near ultraviolet (NUV) in organic light-emitting diodes (OLEDs).
A very high singlet exciton ratio (∼93%) in the electroluminescence of triphenylamine-thiadiazole molecule TPA-NZP is attributed to reverse intersystem crossing (T→S) along high-lying charge-transfer state channel, denoted "hot exciton" mechanism. Compared with a "cold mechanism, this may be good strategy for designing next generation organic light-emitting materials utilization efficiency and radiation efficiency. As service our authors readers, journal provides supporting information...
A greatly enhanced proportion of radiative excitons in non-doped blue electroluminescence with a maximum exciton utilizing efficiency (EUE) 85% is harvested the orthogonal cyano substituted, charge transfer (CT) emitter TPMCN, comparison to localized emission (LE)-like TPM low EUE 16%.
Incorporating mixed ion is a frequently used strategy to stabilize black-phase formamidinum lead iodide perovskite for high-efficiency solar cells. However, these devices commonly suffer from photoinduced phase segregation and humidity instability. Herein, we find that the underlying reason halide perovskites generally fail grow into homogenous high-crystalline film, due multiple pathways of crystal nucleation originating various intermediate phases in film-forming process. Therefore, design...
Abstract Conjugated microporous polymers are a unique class of that combine extended π‐conjugation with inherent porosity. However, these synthesized through solution‐phase reactions to yield insoluble and unprocessable solids, which preclude not only the evaluation their conducting properties but also fabrication thin films for device implementation. Here, we report strategy synthesis π‐conjugated by designing thiophene‐based electropolymerization at solution–electrode interface....
Gold nanoclusters (Au NCs) stand for a new type of fluorescent nanomaterials with outstanding optical properties due to their discrete electronic energy and direct electron transition. However, relative low quantum yield (QY) Au NCs in aqueous or solid state has limited photofunctional applications. To improve the performances find an effective approach fabrication NCs‐based films, this work, are localized onto 2D layered double hydroxides (LDHs) nanosheets via layer‐by‐layer assembly...
Herein, we report an anthracene-based material, 2-(anthracen-9-yl)thianthrene (), whose crystal exhibits excimer fluorescence with unexpected high luminous efficiency (up to 80%) and long lifetime (163.75 ns), due pairwise anthracene stacking. These results will update the traditional view that excimers are poorly efficient in photoluminescence.
Abstract Herein, a simple aza‐aromatic compound dibenzo[a,c]phenazine (DPPZ), which exhibits single‐molecule white light with ternary emission, consisting of simultaneous fluorescence (S 1 →S 0 ) and dual room‐temperature phosphorescence (RTP, T 2 is reported. The Commission Internationale de l' Éclairage coordinates DPPZ powder are (0.28, 0.33). To everyone's knowledge, this the first case to achieve emission RTP. This finding provides prototype strategy realize low‐cost, stable pure...
A new pure fluorescent blue HLCT-emitter was designed and synthesized. Highly efficient non-doped OLEDs with low efficiency roll-off were achieved.
Revealing the photoluminescence (PL) origin and mechanism is a most vital but challenging topic of carbon dots. Herein, confined-domain crosslink-enhanced emission (CEE) effect was first studied by well-designed model system carbonized polymer dots (CPDs), serving as an important supplement to CEE in aspect spatial interactions. The "addition-condensation polymerization" strategy adopted construct CPDs with substituents exerting different degrees steric hindrance. on structure luminescence...
Abstract The development of near‐infrared (NIR) organic light‐emitting diodes (OLEDs) is growing interest. Donor–acceptor (D–A) chromophores have served as an important class NIR materials for OLED applications. However, the external quantum efficiencies (EQEs) OLEDs based on conventional D–A are typically below 1 %. Reported herein a butterfly‐shaped compound, PTZ‐BZP. A PTZ‐BZP film displayed strong fluorescence with emission peak at 700 nm, and corresponding efficiency reached 16...
A visible-light responsive photocatalyst was fabricated by anchoring NiTi-layered double hydroxide (NiTi-LDH) nanosheets to the surface of reduced graphene oxide sheets (RGO) via an in situ growth method; resulting NiTi-LDH/RGO composite displays excellent photocatalytic activity toward water splitting into oxygen with a rate 1.968 mmol g–1 h–1 and quantum efficiency as high 61.2% at 500 nm, which is among most effective photocatalysts. XRD patterns SEM images indicate that NiTi-LDH...
We report a new synthetic strategy for the fabrication of several supported nickel phosphides (Ni12P5, Ni2P, and NiP2) with particle size ranging from 5 to 15 nm via two-step procedure: preparation Ni particles layered double hydroxide precursors, followed by further reaction certain amount red phosphorus. The selective hydrogenation phenylacetylene over these metal was evaluated, as-prepared Ni2P/Al2O3 catalyst shows much higher selectivity styrene (up 88.2%) than Ni12P5/Al2O3 (48.0%),...
Photoluminescence (PL) efficiency and exciton utilization are two key parameters to harvest high-efficiency electroluminescence (EL) in organic light-emitting diodes (OLEDs). But it is not easy simultaneously combine these characteristics (high PL high utilization) into a fluorescent material. In this work, an efficient combination was achieved through concepts of hybridized local charge-transfer (CT) state (HLCT) "hot exciton", which the former responsible for while latter contributes...
A family of photocatalysts for water splitting into hydrogen was prepared by distributing TiO(6) units in an MTi-layered double hydroxide matrix (M = Ni, Zn, Mg) that displays largely enhanced photocatalytic activity with H(2)-production rate 31.4 μmol h(-1) as well excellent recyclable performance. High-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) mapping and XPS measurement reveal a high dispersion octahedra the layered doubled (LDH) obtained formation...
Abstract Organic optoelectronics are promising technologies for energy conversion. However, the electrode interlayer, a key material between active layers and conducting electrodes that controls transport of charge carriers in out devices, is still chemical challenge. Herein, we report class porous organic polymers with tunable work function as hole‐ electron‐selective interlayers. The network organoborane carbazole units exhibits extremely low work‐function‐selective electron flow; while...
Finely dispersed Pd nanoparticles (PdNPs) anchored to CoAl layered double hydroxide nanowalls (LDH-NWs) have been fabricated via a facile in situ redox reaction between the LDH-NWs and PdCl42− precursor. The integrated play roles of both hierarchical support reductant without any external agent, ensuring cleanness metal–support interface. Based on effective exposure active sites elaborate network architecture, Pd/LDH-NW heterogenous material yields largely improved catalytic activity as well...