A5102002176- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Polyoxometalates: Synthesis and Applications
- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Organic Light-Emitting Diodes Research
- Advanced Thermoelectric Materials and Devices
- Chalcogenide Semiconductor Thin Films
- Catalytic Processes in Materials Science
- Advanced Photocatalysis Techniques
- Thermal Radiation and Cooling Technologies
- Geomechanics and Mining Engineering
- Catalysis and Oxidation Reactions
- 3D Printing in Biomedical Research
- Industrial Gas Emission Control
- Synthesis and Properties of Aromatic Compounds
- Advanced Nanomaterials in Catalysis
- Thermal properties of materials
- Additive Manufacturing and 3D Printing Technologies
- Nanomaterials for catalytic reactions
- Optical properties and cooling technologies in crystalline materials
- Metal-Organic Frameworks: Synthesis and Applications
- Advanced Algorithms and Applications
- Luminescence and Fluorescent Materials
- Advanced Control Systems Optimization
Beijing University of Chemical Technology
2023-2024
Energy Research Institute
2024
Nanjing Institute of Technology
2023
Collaborative Innovation Center of Quantum Matter
2021-2022
Peking University
2020-2022
China Medical University
2020-2021
Central South University
2019
Northeast Normal University
2013-2018
China University of Petroleum, Beijing
2013-2015
Shenhua Group (China)
2014
Lead halide perovskite films have witnessed rapid progress in optoelectronic devices, whereas polycrystalline heterogeneities and serious native defects are still responsible for undesired recombination pathways, causing insufficient utilization of photon-generated charge carriers. Here, radiation-enhanced with ultralong carrier lifetimes exceeding 6 μs single-crystal-like electron-hole diffusion lengths more than 5 μm achieved. Prolongation charge-carrier activities is attributed to the...
The depth-dependent defect manipulation strategy using binary modulators with selective penetrability within perovskite films can concurrently passivate the defects both in bulk and at interfaces, boosting efficiency of solar cell to 24.36%.
The benefits of excess PbI2 on perovskite crystal nucleation and growth are countered by the photoinstability interfacial in solar cells (PSCs). Here we report a simple chemical polishing strategy to rip crystals off surface decouple these two opposing effects. results favorable exhibiting enhanced luminescence, prolonged carrier lifetimes, suppressed ion migration, better energy level alignment. These desired translate into increased photovoltages fill factors, leading high-performance...
Perovskite light-emitting diodes (PeLEDs) are the next promising display technologies because of their high color purity and wide gamut, while two classical emitter forms, i.e., polycrystalline domains quantum dots, encountering bottlenecks. Weak carrier confinement large leads to inadequate radiative recombination, surface ligands on dots main annihilation sites for injected carriers. Here, pinpointing these issues, we screened out an amphoteric agent, namely, 2-(2-aminobenzoyl)benzoic acid...
A variety of defects exist on the crystalline surfaces solution-processed polycrystalline perovskites, resulting in photovoltaic output losses and subsequent degradations. It is necessary to develop a versatile passivator that can concurrently eliminate multiple defects, including vacancy, interstitial, antisite substitution, dissociative I2. Herein, we focus multiple-defect management optimize defective perovskite by using three kinds chemical bonds with pyridine-containing polymeric agent....
A prerequisite for commercializing perovskite photovoltaics is to develop a swift and eco-friendly synthesis route, which guarantees the mass production of halide perovskites in industry. Herein, green-solvent-assisted mechanochemical strategy developed fast synthesizing stoichiometric δ-phase formamidinium lead iodide (δ-FAPbI3 ) powder, serves as high-purity precursor film deposition with low defects. The presynthesized δ-FAPbI3 possesses high concentration micrometer-sized colloids, are...
Abstract Blue conjugated polymers‐based OLEDs with both high efficiency and low roll‐off are under big challenge. Herein, a strategy of local conjugation is proposed to construct high‐efficiency blue‐emitting polymers, in which the degree polymeric backbones adjusted by inserting different spacers. In this way, energy level triplet state transfer direction main‐chains can be effectively regulated. Benefiting from such fine regulation, prepared alternative copolymers Alt‐PB36 better suppress...
Single-crystal trigonal tellurium nanowires and nanotubes were synthesized using a facile, efficient, relatively green solution phase method with ethylene glycol as solvent an alternative reducing agent in the presence of NaOH. Large-scale production slender hollow average diameters 72 240 nm, respectively, was achieved by increasing temperature from 170 °C to 200 °C. Tellurium morphology also controlled adjusting NaOH dosage. Scanning electron micrographs show that low or insufficiency...
Abstract The development of universal interlayer materials for diverse optoelectronic devices not only decreases the costs in both laboratory research and industrialized production, but also improves uniformity different so as to facilitate device integration. However, using one material fabricate remains a great challenge. Herein, p‐π conjugation is utilize replace commonly used π–π develop an unprecedented anode (AIL) PCP‐S that can be universally devices, including organic light‐emitting...
Gelatin methacryloyl (GelMA) hydrogels have aroused considerable interests in the field of tissue engineering due to tunable physical properties and cell response parameters. A number works studied impact GelMA concentration, photo-initiator methacrylic anhydride (MA) cooling rate temperature gradient on hydrogel generation, but little attention has been paid effect freezing temperatures time prepolymer solution during preparation. In this study, were synthesized with different time. It was...
Organic semiconductors with chemically tailored photoelectric properties and deliberately engineered chiral-optical activity, along their cost-effectiveness superior processing efficiency, exhibit considerable potential as promising candidates for circularly polarized light (CPL) detection. Nevertheless, traditional organic materials constructing high-performance CPL photodetectors remain challenging due to the constrained triplet exciton utilization, resulting in a moderate responsivity....
A large-grained perovskite film, with a crystal grain size of ca. 30-50 μm, was achieved by polyoxometalate-induced Ostwald ripening. Aiming at commercially-oriented fully printable hole-conductor-free solar cells, the power conversion efficiency device significantly improved from 9.17% to 11.35% (average) via polyoxometalate molecular doping. This is because film could effectively reduce bulk defects and charge recombination, thereby facilitating transport.
The perovskite–polyoxometalate composite displayed better photoconductivity and photodetction performance than pristine perovskite.
The polyoxometalates and TiO<sub>2</sub> composite displayed better photoconductivity gas sensing performance for acetone than pristine TiO<sub>2</sub>.
Porous aromatic frameworks (PAFs) with rich metal coordination sites are highly effective support materials for gold nanoparticles (AuNPs), which would not only prevent AuNPs agglomeration but also facilitate mass transfer during the catalytic process. In this work, PAF-160, -161, and -162 bearing diphosphine units synthesized via Friedel–Crafts alkylation reaction to act as efficient platforms immobilization. These PAFs possess high surface areas (up 655 m2 g–1) together excellent...
Abstract Solar cells capable of light‐harvesting during daytime and light‐emission at night are multifunctional semiconductor devices with many potential applications. Here, it is reported that halide perovskite heterojunction interfaces can be refined to yield stable efficient solar cells. The cell also operate effectively as an ultralow‐voltage light‐emitting diode (LED) a peak external quantum efficiency electroluminescence (EQE EL ) 3.3%. Spectroscopic microscopic studies reveal...
Abstract In this research, molecular structure models were developed respectively for Shenhua coal vitrinite concentrates (SDV) and inertinite (SDI), on the basis of information constitutional unit Shenhau elemental analysis results obtained from 13 C-NMR characterization, FTIR X-ray diffraction XRD XPS characterization. It can be observed characterization data that SDV SDI is dominated by aromatic hydrocarbon, with aromaticity higher than SDV; mainly consists small molecule basic unit,...