Publications by authors named "Zaiyu Wang"

Beyond the crystalline photodiodes for infrared visualization, with the limitation of opacity and complex lithographic processes, organic upconversion device (UCD) have emerged as a potential alternative. In this research, a ternary compensation strategy is implemented in a non-fullerene-based active layer to reduce the dark current of the detector and enhance its detection performance, which enables high-sensitive efficient upconversion device for near-infrared light (NIR) visualization. The device achieves an infrared-to-visible upconversion efficiency of 16.

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Redox balance is essential for sustaining normal physiological metabolic activities of life. In this study, we present a photocatalytic system to perturb the balance of NADH/NAD in oxygen-free conditions, achieving photocatalytic therapy to cure anaerobic bacterial infected periodontitis. Under light irradiation, the catalyst TBSMSPy can bind bacterial DNA and initiate the generation of radical species through a multi-step electron transfer process.

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Article Synopsis
  • - Minimizing energy loss in organic solar cells (OSCs) is key for improving their efficiency, primarily addressing non-radiative recombination loss from exciton-vibration coupling.
  • - By strategically tuning intramolecular noncovalent interactions in fused ring electron acceptors (FREAs), researchers can enhance molecular rigidity and reduce energy loss, leading to impressive power conversion efficiencies (PCE).
  • - A new binary OSC device (Y-SeSe) achieved a PCE of 19.49% with a very low energy loss (ΔE of 0.184 eV), while a ternary blend device reached a PCE of 20.51%, showcasing the potential of these methods for high-performance OSCs. *
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Advanced smart polymer materials with the ability of reversible deformation under external stimuli hold great potential in robotics, soft machines, and flexible electronics. However, the complexity and low efficiency for fabricating actuators along with their limited functionality hinder further progress. Here an efficient and mild catalyst-free thiol-yne click polymerization was developed to fabricate photosensitive polyimide (PI) films.

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  • A novel method is introduced for improving organic photovoltaic (OPV) devices by using a giant molecule acceptor (GMA) at the donor-acceptor interface, enhancing both efficiency and stability.
  • The approach involves mixing the giant molecule acceptor DQx-Ph with a polymer donor in the bottom layer, followed by the addition of the main acceptor L8-BO, which alters the morphology of the mixed phase for better performance.
  • This technique results in a power conversion efficiency of 19.9% while reducing energy losses and improving operational stability, highlighting the potential of GMA interface strategies in advancing OPV technology.
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  • Photodynamic therapy (PDT) is a noninvasive cancer treatment that uses photosensitizers to enhance therapeutic effects, and the study focuses on a newly synthesized photosensitizer called DTCSPP.
  • DTCSPP has a unique donor-π-acceptor structure, shows aggregation-induced emission properties, and is effective in targeting mitochondria, making it suitable for cancer treatment.
  • The research reveals that DTCSPP can generate reactive oxygen species and stimulate cell death processes in cancer cells, highlighting its potential as a valuable tool in improving anticancer therapies.
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Understanding the properties of the precursor can provide deeper insight into the crystallization and nucleation mechanisms of perovskites, which is vital for the solution-process device performance. Herein, we conducted a detailed investigation into the photophysics properties of CsPbBr precursors in a broad concentration and various solvents. The precursor transformed from the solution state into the colloidal state and exhibited aggregation-induced emission character as the concentration increased.

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Targeted and controllable drug release at lesion sites with the aid of visual navigation in real-time is of great significance for precise theranostics of cancers. Benefiting from the marvelous features (e.g.

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As high brittleness limits the application of all epoxy resins (EP), here, it can be modified by high-performance thermoplastic poly(ether nitrile ketone) containing phthalazinone structures (PPENK). Therefore, the influence of different PPENK contents on the mechanical, thermal, and low-temperature properties of EP was comprehensively investigated in this paper. The binary blend of PPENK/EP exhibited excellent properties due to homogeneous mixing and good interaction.

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In order to adapt the development of vehicle driving automation technology for driving conditions under different levels of automation and based on the independently invented LF automatic pressure regulating valve (LF-APRV) for electronically controlled pneumatic brake systems (ECPBS), the dynamic PWM coupling pressure regulation method is proposed. This method realizes pressure regulation by adjusting the duty cycle of the control signal of the LF-APRV at different stages in the pressure regulation cycle. A co-simulation model was established to verify the feasibility of the method, and a test system was built to verify the correctness of the co-simulation model.

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Immunogenic cell death (ICD) through apoptosis or necroptosis is widely adopted to improve the therapeutic effect in cancer treatment by triggering a specific antitumor immunity. However, the tumor resistance to apoptosis/necroptosis seriously impedes the therapeutic effect. Recently, ferroptosis featured with excessive lipid peroxidation is demonstrated capable of bypassing the apoptosis/necroptosis resistance to kill cancer cells.

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The development of autonomous materials with desired performance and built-in visualizable sensing units is of great academic and industrial significance. Although a wide range of damage indication methods have been reported, the "turn-on" sensing mechanism by damaging events based on microcapsule systems, especially those relying on chemical reactions to elicit a chromogenic response, are still very limited. Herein, a facile and metal-free polymerization route with an interesting reaction-induced coloration effect is demonstrated.

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Biofilm-related infections, such as dental plaque, chronic sinusitis, native valve endocarditis, and chronic airway infections in cystic fibrosis have brought serious suffering to patients and financial burden to society. Materials that can eliminate mature biofilms without developing drug resistance are promising tools to treat biofilm-related infections, and thus they are in urgent demand. Herein, we designed and readily prepared organic nanoparticles (NPs) with highly efficient photothermal conversion by harvesting energy via excited-state intramolecular motions and enlarging molar absorptivity.

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  • The advancement of synthetic chemistry has led to the development of artificial luminogens, but many struggle with weak emission in solid states and lack of sustainability.
  • New natural rosin-derived luminogens with aggregation-induced emission properties (AIEgens) have been created, showcasing good biocompatibility and the ability to target organelles while demonstrating photochromic behavior.
  • A mechanistic study reveals that adding an alicyclic moiety reduces excited-state molecular motion, enhancing solid-state emission and highlighting its importance in luminogen design for scalable, biocompatible applications.
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The active layer morphology transition of organic photovoltaics under non-equilibrium conditions are of vital importance in determining the device power conversion efficiency and stability; however, a general and unified picture on this issue has not been well addressed. Using combined in situ and ex situ morphology characterizations, morphological parameters relating to kinetics and thermodynamics of morphology evolution are extracted and studied in model systems under thermal annealing. The coupling and competition of crystallization and demixing are found to be critical in morphology evolution, phase purification and interfacial orientation.

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Life process is amazing, and it proceeds against the eternal law of entropy increase through molecular motion and takes energy from the environment to build high-order complexity from chaos to achieve evolution with more sophisticated architectures. Inspired from the elegance of life process and also to effectively exploit the undeveloped solid-state molecular motion, two unique chiral Au(I) complexes were elaborately developed in this study, in which their powders could realize a dramatic transformation from nonemissive isolated crystallites to emissive well-defined microcrystals under the stimulation of mechanical force. Such an unusual crystallization was presumed to be caused by molecular motions driven by the formation of strong aurophilic interactions as well as multiple C-H···F and π-π interactions.

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Nanomaterials with integrated multiple imaging and therapeutic modalities possess great potentials in accurate cancer diagnostics and enhanced therapeutic efficacy. Traditional strategies for achieving multimodality nanoplatform through one by one combination of different modalities are challenged by the complicated structural design and fabrication as well as inherent incompatibility between different modalities. Herein, a novel strategy is presented to realize multimodal imaging and synergistic therapy using a class of simple silver core/AIE (aggregation-induced emission) shell nanoparticles.

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Superior artificial light-harvesting systems (ALHSs) require exceptional capacity in harvesting light and transferring energy. In this work, we report a novel strategy to build ALHSs with an unprecedented antenna effect (35.9 in solution and 90.

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Article Synopsis
  • Pathogenic bacteria, fungi, and viruses are serious health threats, and while there are established methods for detection, challenges remain with time-consuming techniques like culture counting and PCR.
  • The rise of multidrug-resistant pathogens heightens the urgency for innovative therapeutic solutions.
  • Luminogens with aggregation-induced emission (AIEgens) are emerging as effective tools for sensitive pathogen detection and photodynamic therapy, providing a dual approach for diagnosis and treatment.
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Diketopyrrolopyrrole-ethynylene-bridged porphyrin dimers are capped with electron-deficient 3-ethylrhodanine (A) via a π-bridge of phenylene ethynylene, affording two new acceptor-donor-acceptor structural porphyrin dimers (DPP-2TTP and DPP-2TP) with strong absorption in ranges of 400-550 nm (Soret bands) and 700-900 nm (Q bands). Their intrinsic absorption deficiency between the Soret and Q bands could be perfectly compensated by a wide-bandgap small molecule DR3TBDTTF (D*) with absorption at 500-700 nm. Impressively, the optimal ternary device based on the blend films of DPP-2TPP, DR3TBDTTF (20 wt %), and PCBM shows a PCE of 11.

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An inverted device structure is a more stable configuration than a regular device structure for solution-processed organic solar cells (OSCs). However, most of the solution-processed small-molecule OSCs (SM-OSCs) reported in the literature used the regular device structure, and a regular device normally exhibits a higher efficiency than an inverted device. Herein, a representative small-molecule DR3TBDTT was selected to figure out the reason for photovoltaic performance differences between regular and inverted devices.

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Ternary blending strategy has been used to design and fabricate efficient organic solar cells by enhancing the short-circuit current density and the fill factor. In this manuscript, we report all-small-molecule ternary solar cells consisting of two compatible small molecules DR3TBDTT (M1) and DR3TBDTT-E (M2) as donors and PCBM as acceptor. A transformation from an alloy-like model to a cascade model are first realized by designing a novel molecule M2.

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Large-scale fabrication of organic solar cells requires an active layer with high thickness tolerability and the use of environment-friendly solvents. Thick films with high-performance can be achieved via a ternary strategy studied herein. The ternary system consists of one polymer donor, one small molecule donor, and one fullerene acceptor.

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Ternary organic solar cells (OSCs) have attracted much research attention in the past few years, as ternary organic blends can broaden the absorption range of OSCs without the use of complicated tandem cell structures. Despite their broadened absorption range, the light harvesting capability of ternary OSCs is still limited because most ternary OSCs use thin active layers of about 100 nm in thickness, which is not sufficient to absorb all photons in their spectral range and may also cause problems for future roll-to-roll mass production that requires thick active layers. In this paper, we report a highly efficient ternary OSC (11.

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Solution-processable small molecules for organic solar cells have attracted intense attention for their advantages of definite molecular structures compared with their polymer counterparts. However, the device efficiencies based on small molecules are still lower than those of polymers, especially for inverted devices, the highest efficiency of which is <9%. Here we report three novel solution-processable small molecules, which contain π-bridges with gradient-decreased electron density and end acceptors substituted with various fluorine atoms (0F, 1F and 2F, respectively).

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