Efficient Fully-Solution-Processed Inverted Red Quantum Dot Light-Emitting Diodes Enabled by Charge-Exciton Regulation.

Inverted quantum dot light-emitting diodes (QLEDs) show great promise for next-generation displays due to their compatibility with integrated circuit architectures. However, their development has been hindered by inefficient exciton utilization and charge transport imbalance. Here, we present a strategy for regulating charge-exciton dynamics through the rational design of a multifunctional hole transport layer (HTL), incorporating polyethylenimine ethoxylated (PEIE) as a protective interlayer in fully-solution-processed inverted red QLEDs.

Amorphous Lithium Iron Phosphate Glass-Driven Regeneration of Spent LiCoO Cathodes: Synergistic Structural Effects and Enhanced Electrochemical Performance.

Amidst global sustainability imperatives, this study pioneers a solid-state regeneration strategy that transforms spent LiCoO (LCO) cathodes into high-performance materials via amorphous lithium iron phosphate glass (LFPg)-driven structural reconfiguration. Unlike conventional recycling that decomposes cathodes, our approach leverages LFPg's defect-rich framework, high ionic conductivity, and dynamic interfacial activity to directly reconstruct degraded LCO crystals. The LFPg acts as a multifunctional repair agent: creating Li diffusion channels through disorder engineering, eliminating oxygen vacancies via atomic oxygen transfer, scavenging impurities (e.

Enhancing the Hydrogen Evolution Reaction Performance of TiCO MXene by Metal Doping.

The atomic and electronic structure, thermodynamic stability, and effect of doping the O-terminated TiC MXene (TiCO) by Hf, Nb, Ta, and Zr on the electrocatalytic activity for the hydrogen evolution reaction (HER) is investigated by means of periodic density functional theory (DFT)-based simulations. The preference of doping TiCO with the doping agent either in the outer or inner atomic layers is determined by formation energies' estimates. Among these studied systems, the case where one Hf substitutes one Ti atom in the TiCO inner layer appears to exhibit the optimum HER activity with a ΔG value of -0.

Antibacterial Photodynamic Study on Porphyrin-Based MOF Nanoflowers under Visible Light.

Photodynamic antibacterial materials based on reactive oxygen species (ROS), with the advantages of nonresistance and avoiding common issues such as nonspecific cellular toxicity associated with many antibiotic drugs, are gradually emerging as an attractive treatment modality with significant potential for antibacterial therapy. However, the effectiveness and safety of current photodynamic antibacterial materials still need to be improved. In this study, porphyrin-based metal-organic framework (MOF) nanoflowers were designed and synthesized via a solvent-thermal method using meso-tetra (4-carboxyphenyl) porphyrin (TCPP) as the organic ligands and Cu as the coordinating metal ions, which show visible light responsive photodynamic and photothermal antibacterial effects.

Effect of Nonmetallic Doped VS on Polysulfide Anchoring and Catalysis in Lithium-Sulfur Batteries: A First-Principles Study.

The sluggish conversion kinetics of lithium polysulfide (LiPSs) and the notorious shuttle effect caused by the dissolution of highly soluble LiPSs in the electrolyte have become major obstacles to the practical application of lithium-sulfur batteries. Thus, searching for bifunctional catalyst materials that can effectively capture and convert LiPSs to inhibit their shuttling effect has become the key to developing efficient lithium-sulfur batteries. In this paper, the potential of a series of doped VS monolayers with nonmetallic atoms replacing S atoms as cathode catalytic materials for lithium-sulfur batteries is discussed through first-principles calculations.

High-Efficiency and Long-Lifetime Red Quantum-Dot LEDs Enabled by a Polymer-TADF-Emitter-Based Hole Transport Layer.

Quantum-dot light-emitting diodes (QLEDs) are regarded as promising options for various optoelectronic applications. However, they struggle with an excessive injection of electrons relative to holes, constraining their performance. Here, we propose an efficient hole transport layer (HTL) sensitization method that can reuse leaked electrons and raise the hole transport capability to tackle this challenge.

Organic-Inorganic PTB7-Th:ITIC/ZnO Heterojunction Based Self-Powered Photodetectors with Tunable Dual Detection Windows.

In this work, we demonstrate a filter-free self-powered photodetector based on PTB7-Th:ITIC/ZnO heterojunction that exhibits remarkable selective spectral response characteristics. The device achieves band-selective detection through innovative manipulation of incident light direction, enabling multiple spectral detection capabilities within a single architecture. Under 0 V bias voltage operation, the device exhibits dual-mode detection capability depending on the illumination direction.

Bimetallic selenides heterostructure embedded in urchin-like core/shell conductive rhombic dodecahedron as sulfur host for high-energy-density lithium-sulfur battery.

Lithium-sulfur (Li-S) batteries, characterized by the exceptional theoretical energy density, have emerged as a highly up-and-coming competitor for next-generation power batteries. However, the notorious shuttle effect of lithium polysulfides (LiPSs) and sluggish redox reaction kinetics, particularly under high S loading and lean electrolyte, significantly impeded the commercialized progress of Li-S batteries. Herein, we rationally designed and synthesized a novel urchin-like core/shell rhombic dodecahedron as a S host for the first time, wherein the nanoparticles of bimetallic selenides (CoSe/SbSe) heterojunction are uniformly encapsulated within nitrogen-doped carbon layer and spiny-like CNTs (NC-CNTs) (denoted as CoSe/SbSe@NC-CNT).

Structural Design via Pressure Enables > 1 for CuInTe Chalcopyrites.

Crystalline structures, as the basics of materials, are tightly associated with transport properties. Designing a structure through doping, alloying, and phase engineering to optimize thermoelectric transport properties has always been a crucial strategy in thermoelectrics. In this work, hybrid architectures containing an inherently long-range, nearly cubic framework as well as localized short-range noncubic lattice distortions, are designed in the pristine CuInTe chalcopyrites by a unique high-pressure technology.

Multicolor Persistent Luminescence for High-Sensitivity Optical Temperature Sensing, Human Motion Detection, and Multimodal Anticounterfeiting Materials.

Multimodal luminescent materials are widely used in noncontact temperature sensors and fluorescent dynamic anticounterfeiting due to their visible dynamic persistent luminescence and fast optical signal response. To this end, CaYGaO: 0.01 Bi; CaYGaO: 0.

Scrolled Nanosheet with Thermo-Responsive Unrolling in Self-Assembly of Aromatic Amphiphile.

Rod-coil molecules comprising rigid rod segments and flexible hydrophilic chains have gained attention for generating highly defined nanostructures in solution. In this work, we report the fabrication of scrolled sheet and planar sheet structures from the self-assembly of laterally grafted rod-coil molecules. The mono-grafted rod-coil self-assembles into a scrolled sheet through the spontaneous rolling-up of the planar sheet perpendicular to the fiber long axis, interestingly, the scrolled structures undergo unrolling at higher temperature, exhibiting a thermal-responsive behavior.

Manipulation of Single Nanowire and its Applications.

Micro/nano manipulation of single nanowire has emerged as a popular direction of study in the field of nanotechnology, with promising applications in cutting-edge technologies such as device manufacturing, medical treatment, and nanorobotics. The synthesis of nanowires with controllable length and diameter makes them meet various micro/nano manipulation demands. As manipulation techniques have advanced, including the use of optical tweezers, electric and magnetic fields, mechanical control, and several more control methods, they have demonstrated unique advantages in different application fields.

Tunable pure interference colors of 2D titania liquid crystal with ultrasensitive electroresponse.

Electrochromic effect refers to the electrically tunable coloration of a matter. Emerging see-through color-tunable applications pose a synergetic demand on electrochromic device, concurrently having ultralow field driving, operation in transmissive mode, and high-purity and tunable interference colors of sci-fi perception. However, such an electrochromic device remains elusive.

Robust ferromagnetism in wafer-scale FeGaTe above room-temperature.

The discovery of ferromagnetism in van der Waals (vdW) materials has enriched the understanding of two-dimensional (2D) magnetic orders and opened new avenues for fundamental physics research and next generation spintronics. However, achieving ferromagnetic order at room temperature, along with strong perpendicular magnetic anisotropy, remains a significant challenge. In this work, we report wafer-scale growth of vdW ferromagnet FeGaTe using molecular beam epitaxy.

Constructing high-throughput and highly adsorptive lithium-sulfur battery separator coatings based on three-dimensional hexagonal star-shaped MOF derivatives.

The electrochemical performance of high-performance lithium-sulfur (Li-S) batteries is affected by many factors such as shuttle effect and lithium dendrites. To effectively solve this problem, a hexagonal star-shaped composite catalyst containing Co-N-C active sites (Co-NC-X) has been rationally developed under the joint action of Zn and Co bimetallic ions. By modifying it to the Li-S battery separator, Co-NC-X can not only act as a physical barrier to effectively prevent the diffusion of lithium polysulfide (LiPS), but also the special morphology can expose more active sites and have a strong chemisorption effect on LiPS, which effectively promotes the redox conversion of LiPS and mitigates the shuttle effect.

Amorphous Gallium Oxide-Based Crosstalk-Suppressing Solar-Blind Imaging Array Prepared by One-Step Method.

The solar-blind ultraviolet band presents a unique opportunity for low-background-noise detection due to limited atmospheric light transmission. Especially, with the ability to obtain size, shape and position information on the objects, the solar-blind image sensors are receiving increasing attention. However, because the inhibition of the crosstalk in crossbar arrays induces the complexity of the preparation process, rarely are applicable solar-blind UV imaging arrays reported.

Three-dimensional donor-acceptor conjugated porous polymers based on metal-porphyrin and triazine for highly effective photodegradation of organic pollutants in water.

Three-dimensional donor-acceptor (D-A) type conjugated porous polymers (CPPs) was designed and synthesized via imine condensation of copper tetraaminoporphyrin (CuTAPP) as donor and 1,3,5-tris-(4-formyl phenyl) triazine (TFPT) as acceptor, named as CuPT-CPP. The CuPT-CPP possesses a high specific surface area (73.7 m/g) and excellent photophysical properties.

Controllable Synthesis, Formation Mechanism, and Photocatalytic Activity of Tellurium with Various Nanostructures.

Telluriums (Te) with various nanostructures, including particles, wires, and sheets, are controllably synthesized by adjusting the content of polyvinylpyrrolidone (PVP) in a facile solvothermal reaction. Te nanostructures all have complete grain sizes with excellent crystallinity and mesopore structures. Further, the formation mechanisms of Te nanostructures are proposed to be that the primary nuclei of Te are released from the reduction of TeO using NH·HO, and then grow into various nanostructures depending on the different content of PVP.

A novel single-phase color tunable LiYGeO:Dy, Eu phosphor exhibiting warm white light and excellent thermal stability.

LiYGeO phosphors doped with Dy and Eu ions were synthesized using the solid phase method, and their color characteristics were adjustable. The bandgap value of LiYGeO calculated by diffuse reflection data is very close to the theoretical value of 3.669 eV, indicating that LiYGeO is an ideal candidate for doped rare earth activated ions.

Garnet Structure-Activated Warm White Light Phosphors CaAlGeO: Dy, Eu with Ultrahigh Thermal Stability and Tunable Luminescence.

A series of CaAlGeO: Dy, Eu phosphors were successfully prepared by the high-temperature solid-phase method. The phase and morphology of the phosphors were studied by means of Rietveld refinement and scanning electron microscopy. The results show that the phase is pure, and the crystal structure is the 3̅ space group.

A highly efficient Mn activated Nb-based oxyfluoride red fluorescent material with excellent water stability: preparation and performance analysis.

In this study, an efficient non-rare earth Mn-doped K(NbOF)(HF) red fluorescent material was synthesized by using the coprecipitation method. Replacing KF with KCO effectively solved the problem that KF was difficult to stir due to its strong water absorption. The sample was composed of rods.

Tunable covalent benzo-heterocyclic rings constructed using two-dimensional conjugated polymers for visible-light-driven water splitting.

Developing highly efficient, stable, and cost-effective two-dimensional (2D) conjugated polymers (CPs) for overall water splitting (OWS) is critical for producing clean and renewable hydrogen energy, yet it remains a great challenge. Here, we designed eight 2D CPs through the topological assembly of diacetylene and benzene-derived molecular linkers that can offer active sites for hydrogen and oxygen evolution reactions, and explored their structural, electronic, optical, and photocatalytic OWS properties by performing first-principles computations. It is shown that incorporating benzo-heterocyclic rings into CPs can significantly modulate the electronic structures of CPs and broaden the spectral absorption, suitable for visible-light-driven OWS.

Polarization-Sensitive Detector Based on MoTe/WTe Heterojunction for Broadband Optoelectronic Imaging.

Polarization-sensitive detectors have significant applications in modern communication and information processing. In this study. We present a polarization-sensitive detector based on a MoTe/WTe heterojunction, where WTe forms a favorable bandgap structure with MoTe after forming the heterojunction.