A5002123986- Perovskite Materials and Applications
- Advancements in Battery Materials
- Chalcogenide Semiconductor Thin Films
- Ferroelectric and Piezoelectric Materials
- Quantum Dots Synthesis And Properties
- Advanced Battery Materials and Technologies
- Multiferroics and related materials
- Acoustic Wave Resonator Technologies
- Force Microscopy Techniques and Applications
- Dielectric materials and actuators
- Nonlocal and gradient elasticity in micro/nano structures
- Mechanical and Optical Resonators
- Conducting polymers and applications
- Advanced Battery Technologies Research
- Advanced Sensor and Energy Harvesting Materials
- Solid-state spectroscopy and crystallography
- Extraction and Separation Processes
- Cerebrovascular and Carotid Artery Diseases
- Material Dynamics and Properties
- High voltage insulation and dielectric phenomena
- Advanced Memory and Neural Computing
- Magnetic properties of thin films
- Cellular Mechanics and Interactions
- Organic Light-Emitting Diodes Research
- 2D Materials and Applications
Southern University of Science and Technology
2020-2025
Second Hospital of Hebei Medical University
2022-2023
University of Science and Technology Beijing
2023
Hebei Medical University
2022-2023
Feng Chia University
2022
Gansu Provincial Hospital
2022
National Chi Nan University
2022
Center for Interdisciplinary Studies
2021
Shenzhen Institutes of Advanced Technology
2017-2020
Chinese Academy of Sciences
2017-2020
Van der Waals layered CuInP 2 S 6 (CIPS) is an ideal candidate for developing two-dimensional microelectronic heterostructures because of its room temperature ferroelectricity, although field-driven polarization reversal CIPS intimately coupled with ionic migration, often causing erratic and damaging switching that highly undesirable device applications. In this work, we develop alternative mechanism using flexoelectric effect, abandoning external electric fields altogether, the method...
Triple-cation mixed-halide perovskites of composition Csx (FAy MA1-y )1-x Pb(Iz Br1-z )3 (CsFAMA) have been reported to possess excellent photovoltaic efficiency with minimal hysteresis; in this work, nanoscale insight is shed into the roles illumination-induced polarization and ionic migration hysteresis. By examining concurrent evolution distribution spontaneous CsFAMA under light illumination using dynamic-strain-based scanning probe microscopy, strong linear piezoelectricity arising from...
Abstract Photovoltaic conversion efficiency (PCE) of halide perovskite solar cells has risen spectacularly, yet the very crystalline structure CH 3 NH PbI remains ambiguous after extensive researches, and its polar nature hotly debated. Here we present compelling evidences that crystals self-grown on FTO/TiO 2 substrate consist ferroic domains with alternating nonpolar orders, in contrast to previous experimental theoretical expectations, possess reduced photocurrent. It is found orders can...
Abstract Indoor photovoltaics (IPVs) are expected to power the Internet of Things ecosystem, which is attracting ever‐increasing attention as part rapidly developing distributed communications and electronics technology. The conversion efficiency IPVs strongly depends on match between typical indoor light spectra band gap absorbing layer. Therefore, band‐gap tunable materials, such metal‐halide perovskites, specifically promising candidates for approaching illumination limit ∼56%. However,...
Room-temperature polar skyrmions, which have been recently discovered in oxide superlattice, received considerable attention for their potential applications nanoelectronics owing to nanometer size, emergent chirality, and negative capacitance. For practical applications, manipulation using external stimuli is a prerequisite. Herein, we study the dynamics of individual skyrmions at nanoscale via situ scanning transmission electron microscopy. By monitoring electric-field-driven creation,...
The bulk photovoltaic effect (BPVE) offers an interesting approach to generate a steady photocurrent in single-phase material under homogeneous illumination, and it has been extensively investigated ferroelectrics exhibiting spontaneous polarization that breaks inversion symmetry. Flexoelectricity symmetry via strain gradient the otherwise nonpolar materials, enabling manipulation of ferroelectric order without electric field. Combining these two effects, we demonstrate active mechanical...
An AI-AFM is capable of classification, feature identification, and adaptive experimentation, all without human interference.
Abstract Silicon‐based field effect transistors have underpinned the information revolution in last 60 years, and there is a strong desire for new materials, devices, architectures that can help sustain computing power age of big data artificial intelligence. Inspired by Piezo channels, mechanically gated transistor abandoning electric gating altogether, achieving an ON/OFF ratio over three orders magnitude under mechanical force hundreds nN developed. The two‐terminal device utilizes...
Halide perovskite solar cells based on CH3NH3PbI3 and related materials have emerged as the most exciting development in next generation photovoltaic technologies, yet microscopic phenomena involving photo-carriers, ionic defects, spontaneous polarization, molecular vibration rotation interacting with numerous grains, grain boundaries, interfaces are still inadequately understood. In fact, there is need for an effective method to interrogate local properties of halide that can be directly...
Carbon-coating strengthens the stability of SEI on Si anodes through optimizing chemical composition with more LiF to reach higher Young's modulus, which inhibits cracking in active materials and suppresses decomposition electrolyte.
Optoelectronic logic gates (OELGs) converting photonic inputs into electric output based on Boolean are promising for next-generation computations, and it is highly desirable to be able control the current polarity by light multifunctional devices. Here we report a new strategy OELGs bipolar photoconduction intrinsic ferroelectric materials, simplifying device configuration considerably while enabling multiple operations. We demonstrate this concept in two-dimensional (2D) CuInP2S6 (CIPS),...
The Materials Genome Initiative aims to discover, develop, manufacture, and deploy advanced materials at twice the speed of conventional approaches. To achieve this, high-throughput characterization is essential for rapid screening candidate materials. In this study, a scanning second-harmonic-generation microscope with automatic partitioning, accurate positioning, fast developed that can rapidly probe screen polar Using technique, typical ferroelectrics, including periodically poled lithium...
Nanocomposites combining inorganic nanoparticles with high dielectric constant and polymers breakdown strength are promising for the energy density storage of electricity, carrier traps can significantly affect process. Nevertheless, there still lacks direct experimental evidence on how trap characteristics nanocomposites, especially in a spatially resolved manner. Here, technique is developed to image distribution based sequential Kelvin probe force microscopy (KPFM) combination isothermal...
Background: ‘Push’ and ‘pull’ factors motivate Filipino registered nurses (RNs) to leave for employment in foreign countries making the Philippines leading source country overseas. Objective: To assess current RN‐staffing situation Philippine hospitals. Design: A self‐administered survey was mailed a sample of 200 hospital chiefs nurses. Results: According respondents, majority RNs their hospitals (73%) were aged 40 years younger female (85%); government earned higher wages than private RNs;...
Surface modification based on 4-DMABA allows for the enhancement of efficiency and stability an inverted perovskite solar cell. This is ascribed to passivation surface traps recombination suppression, hydrophobic capping layer, respectively.
Perovskite solar cell (PSC) is one of the most promising next generation photovoltaic technologies, and there are considerable interests in role possible polarization organic-inorganic halide perovskites (OIHPs) conversion. The polarity OIHPs, however, still hotly debated. In this review, we examine recent literature on OIHPs from both theoretical experimental points view, argue that they can be polar nonpolar, depending compositions, processing, environments. Implications OIHP to conversion...
Abstract International health experts agree that China is on the verge of an AIDS crisis. In response, Chinese government initiated “Four Frees and One Care” policy in 2003 to decrease economic barriers increase access antiretroviral therapies for people with HIV. However, long-term treatment success requires not only access, but high rates medication adherence. This qualitative interview study 29 persons receiving HIV care at Beijing's Ditan Hospital identified facilitators The interviews...
Abstract In 2004, K. S. Novoselov and A. Geim et al. have used sellotape to peel off the layered 2D graphite, successfully obtained few‐layer thin graphene. Inspired by this, herein, is initially exfoliate Ruddlesden–Popper (RP) quasi‐2D perovskite film for efficient light‐emitting diodes application. The top surface layer of mechanically peeled without damaging crystalline region below, which minimizes poor conductivity issue owing decreased defect density. Moreover, exfoliated exhibits low...