A5100350242- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Advanced Photocatalysis Techniques
- Conducting polymers and applications
- Solid-state spectroscopy and crystallography
- Advancements in Battery Materials
- ZnO doping and properties
- Thin-Film Transistor Technologies
- Chalcogenide Semiconductor Thin Films
- Air Quality and Health Impacts
- TiO2 Photocatalysis and Solar Cells
- Advanced Battery Materials and Technologies
- Atmospheric chemistry and aerosols
- Catalytic Processes in Materials Science
- 2D Materials and Applications
- Organic Light-Emitting Diodes Research
- Data-Driven Disease Surveillance
- Calibration and Measurement Techniques
- Atmospheric Ozone and Climate
- Layered Double Hydroxides Synthesis and Applications
- Copper-based nanomaterials and applications
- Infrared Target Detection Methodologies
- Evacuation and Crowd Dynamics
- Geographic Information Systems Studies
- Air Quality Monitoring and Forecasting
Peking University
2016-2025
King University
2025
Ministry of Education of the People's Republic of China
2025
Heilongjiang Electric Power Workers University
2021-2025
State Key Laboratory for Structural Chemistry of Unstable and Stable Species
2013-2024
Beijing National Laboratory for Molecular Sciences
2014-2024
Swinburne University of Technology
2023-2024
Peking University People's Hospital
2024
Institute of Microelectronics
2020-2022
Beijing University of Chemical Technology
2022
In the paper a novel hybrid model combining air mass trajectory analysis and wavelet transformation to improve artificial neural network (ANN) forecast accuracy of daily average concentrations PM2.5 two days in advance is presented. The was developed from 13 different pollution monitoring stations Beijing, Tianjin, Hebei province (Jing-Jin-Ji area). used recognize distinct corridors for transport "dirty" "clean" selected stations. With each corridor, triangular station net constructed based...
Due to light-induced effects in CH3NH3-based perovskites, such as ion migration, defects formation, and halide segregation, the degradation of perovskite solar cells under maximum power point is generally implicated. Here we demonstrated that effect light-enhanced migration CH3NH3PbI3 can be eliminated by inorganic Cs substitution, leading an ultrastable cell. Quantitatively, barrier for 0.62 eV dark conditions, larger than CsPbI2Br (0.45 eV); however, it reduces 0.07 illumination, smaller...
In recent years, deep learning has been widely studied for remote sensing image analysis. this paper, we propose a method remotely-sensed classification by using sparse representation of features. Specifically, use convolutional neural networks (CNN) to extract features from high levels the data. Deep provide level spatial information created hierarchical structures. Although may have dimensionality, they lie in class-dependent sub-spaces or sub-manifolds. We investigate characteristics...
Abstract Soft lattice and strong exciton–phonon coupling have been demonstrated in layered double perovskites (LDPs) recently; therefore, LDPs represents a promising class of compounds as excellent self‐trapped exciton (STE) emitters for applications solid‐state lighting. However, few with outstanding STE emissions discovered, their optoelectronic properties are still unclear. Based on the three‐dimensional (3D) Cs 2 NaInCl 6 , we synthesized two 2D derivatives (PEA) 4 8 :Sb...
Dry reforming of methane (DRM) has provided an effective avenue to convert two greenhouse gases, CH4 and CO2 , into syngas. Here, we design a DRM photocatalyst Rh/Cex WO3 that invokes both photothermal photoelectric processes, which overcomes the thermodynamic limitation under conventional conditions. In contrast plasmonic or UV-response photocatalysts, our produces superior light-to-chemical energy efficiency (LTCEE) 4.65 % with moderate light intensity. We propose light-induced...
Abstract Composition engineering of halide perovskite allows the tunability band gap over a wide range so that photons can be effectively harvested, an aspect is critical importance for increasing efficiency photocatalysis under sunlight. However, poor stability and low photocatalytic activity perovskites prevent use these defect‐tolerant materials in applications involving photocatalysis. Here, alcohol‐based system dye degradation demonstrated high through double Cs 2 AgBiBr 6 . The...
Organometal halide perovskites are mixed electronic–ionic semiconductors. It is imperative to develop a deeper understanding of how ion-migration behavior in impacts the long-term operational stability solar cells. In this work, we found that ion penetration from perovskite layer into adjacent organic hole-selective crucial cause performance degradation The monovalent cation, namely, methylammonium (MA+), main species penetrates Spiro-MeOTAD because built-in electric field during operation....
The fabrication of high-quality perovskite film highly relies on chemical composition and the synthesis method perovskite. So far, sequentially deposited MA
MACl, as additive to the standard FAPbI3 precursor solution, enables near-complete coverage perovskite film stabilize phase-pure black annealing at 100 °C. A partial substitution of FACl for FAI in solution is used grow FA perovskites with controllable chlorine doped fraction, which improves performance planar solar cell. As a service our authors and readers, this journal provides supporting information supplied by authors. Such materials are peer reviewed may be re-organized online...
Uniform perovskite films are achieved by HCl-assisted one-step spin-coating at room temperature. By this method, a highest power conversion efficiency of 17.9% is obtained for solar cells (PSCs). The devices retain ≈95% their original after storage in air two months. large-area PSCs (0.86 cm2) 15.7%. As service to our authors and readers, journal provides supporting information supplied the authors. Such materials peer reviewed may be re-organized online delivery, but not copy-edited or...
Specific point was achieved for flexible MAPbI<sub>3</sub> solar cells with CPTA modified SnO<sub>2</sub> ETL.
The lead-free halide perovskite A3 Sb2 Br9 is utilized as a photocatalyst for the first time C(sp3 )-H bond activation. nanoparticles (A3 NPs) with different ratios of Cs and CH3 NH3 (MA) show photocatalytic activities toluene oxidation performance enhanced when increasing amount Cs. octahedron distortion caused by A-site cations can change electronic properties X-site ions further affect electron transfer from molecules to Br sites. After regulation cations, activity higher NPs than that...
Abstract Organolead trihalide perovskite films with a large grain size and excellent surface morphology are favored to good‐performance solar cells. However, interstitial antisite defects related trap‐states originated unavoidably on the surfaces of prepared by solution deposition procedures. The development post‐growth treatment defective is an attractive method reduce form good‐quality layers. Herein, post‐treatment tactic developed optimize crystallization treating one‐step deposited CH 3...
Abstract Ion migration and phase segregation, in mixed‐cation/anion perovskite materials, raises a bottleneck for its stability improvement solar cells operation. Here, the synergetic effect of electric field illumination on segregation Cs 0.05 FA 0.80 MA 0.15 Pb(I 0.85 Br ) 3 (CsFAMA) is demonstrated. CsFAMA with CsPbBr ‐clusters passivated structure realized, which are located at surface/interface grains. This realized by introducing colloidal solution into precursor. It found that...
Abstract Transition metal sulfides hold promising potentials as Li‐free conversion‐type cathode materials for high energy density lithium batteries. However, the practical deployment of these is hampered by their poor rate capability and short cycling life. In this work, authors take advantage hollow structure CuS nanoboxes to accommodate volume expansion facilitate ion diffusion during discharge–charge processes. As a result, achieve excellent performance (≈371 mAh g −1 at 20 C) ultra‐long...
Monodisperse TiO2 hollow spheres assembled by nanospindles were prepared via the facile hydrothermal reaction of peroxotitanium complex precursors. Time dependent trails revealed that shape evolution involved a one-step chemical conversion from amorphous Ti microspheres to anatase hierarchical spheres. Meanwhile, sizes could be tuned in region 400–1000 nm simply adjusting ammonia dosage precursor solution. Furthermore, these as-prepared deposited as scattering layer on top nanocrystalline...
An ideal counter electrode, with high electrocatalytic activity, performance stability, and applicable fabrication simplicity, is essential to give full play the advantages of quantum-dot-sensitized solar cells (QDSSCs) such as theoretical efficiency simple synthetic procedure. Herein, we report a facile one-step electrochemical deposition approach for growth hierarchical covellite (CuS) nanostructures on conductive glass substrates. The as-synthesized copper sulfide can be employed directly...
Abstract Molecular imaging techniques based on surface‐enhanced Raman scattering (SERS) face a lack of reproducibility and reliability, thus hampering its practical application. Flower‐like gold nanoparticles have strong SERS enhancement performance due to having plenty hot‐spots their surfaces, this is not dependent the aggregation particles. These features make kind particle an ideal substrate improve in imaging. Here, properties individual flower‐like are systematically investigated. The...
Integrating metallic halide perovskites with established modern semiconductor technology is significant for promoting the development of application-level optoelectronic devices. To realize such devices, exploring growth dynamics and interfacial carrier deposited on core materials essential. Herein, we report incommensurate heteroepitaxy highly oriented single-crystal cesium lead bromide (CsPbBr3) c-wurtzite GaN/sapphire substrates atomically smooth surface uniform rectangular shape by...
Exploring the exciton-phonon interaction of cesium lead bromide (CsPbBr3) perovskite nanowires (NWs) is not only important to fundamental understanding phonon-assisted carrier dynamics but also critical for development high performance miniaturized light sources. Herein, we systematically investigated temperature (T) dependent spontaneous emission (SE) and lasing spectra chemical vapor deposited CsPbBr3 NWs. We demonstrated that both SE energy were mainly determined by two facts:...
Abstract Rechargeable magnesium batteries are a promising alternative to Li‐based energy storage because of their abundant and inexpensive components. The high sensitivity reactivity the organic Mg 2+ electrolyte makes development challenging. Herein, we develop new hybrid electrolyte, based on three simple inorganic salts MgCl 2 , AlCl 3 Mg(TFSI) . exhibits unprecedented electrochemical performance for reversible deposition stripping Mg, with Coulombic efficiency up 97 %, overpotential down...
Indium (In)-based halide perovskites are desirable for next-generation phosphors and emitting devices, due to their broad emission, nontoxicity, oxidization avoidance capabilities. However, the...
Organic–inorganic hybrid halide perovskite materials have attracted enormous interest in recent years due to their excellent photovoltaic properties, which are strongly limited by instability. Solar cells based on the inorganic been developed rapidly and exhibit stability. The crystalline quality composition of layer play key role efficiency solar cells. Among various film deposition techniques, pulsed laser has distinctive advantages preparation thin films high close duplication targets. In...