A5053503466- Perovskite Materials and Applications
- Conducting polymers and applications
- Chalcogenide Semiconductor Thin Films
- Granular flow and fluidized beds
- Organic Electronics and Photovoltaics
- Quantum Dots Synthesis And Properties
- Particle Dynamics in Fluid Flows
- Semiconductor materials and devices
- Organic Light-Emitting Diodes Research
- Silicon and Solar Cell Technologies
- Ideological and Political Education
- Educational Technology and Pedagogy
- Soil Mechanics and Vehicle Dynamics
- Integrated Circuits and Semiconductor Failure Analysis
- Advancements in Semiconductor Devices and Circuit Design
- Material Dynamics and Properties
- Advanced ceramic materials synthesis
- 2D Materials and Applications
- Silicon Nanostructures and Photoluminescence
- Metal and Thin Film Mechanics
- Geotechnical and Geomechanical Engineering
- Plasmonic and Surface Plasmon Research
- Nanowire Synthesis and Applications
- Mineral Processing and Grinding
- GaN-based semiconductor devices and materials
Peking University
2014-2024
University of Science and Technology Beijing
2011-2024
Durham University
2022
State Council of the People's Republic of China
2020
Collaborative Innovation Center of Quantum Matter
2017
Shanxi University
2017
Monolayer molybdenum disulphide (MoS2) has attracted much attention, due to its attractive properties, such as two-dimensional direct bandgap, valley-selective circular dichroism, and valley Hall effect. However, some of fundamental physical parameters, e.g. refractive index, have not been studied in detail because measurement difficulties. In this work, we synthesized highly crystalline monolayer MoS2 on SiO2/Si substrates via chemical vapor deposition (CVD) method devised a measure their...
Research concerning CH3NH3PbI3 solar cells (SCs) has attracted great attention. However, the material’s critical dispersion relationships, i.e. refractive index and extinction coefficient, n(λ) k(λ), as functions of λ, have been little studied. Without this knowledge, it will be difficult to quantitively investigate optical properties SCs. We studied k(λ) with spectroscopic ellipsometry. The film was fabricated by dual-source evaporation, surface roughness investigated facilitate SE...
Abstract With field effect transistor (FET) sustained to downscale sub‐10 nm nodes, performance degradation originates from short channel effects (SCEs) and power consumption increment attributed inhibition of supply voltage (VDD) scaling down proportionally caused by thermionic limit subthreshold swing (SS) (60 mV dec −1 ) pose substantial challenges for today's semiconductor industry. To further sustain the Moore's law life, incorporation new device concepts or materials are imperative. 2D...
Very recently, the NH2CH = NH2PbI3 (FAPbI3) perovskite material has attracted considerable attention in fabricating solar cells (SCs). For a photovoltaic material, its refractive index and extinction coefficient, n(λ) k(λ), as functions of λ, are important to study optical properties estimate power conversion efficiency potential for SCs made it. As far we know, date there been no reports k(λ) FAPbI3 material. In this article, with spectroscopic ellipsometry (SE) measurements, well E g 1.45...
This paper studies the segregation behavior of binary granular particles with diameters at approximately 10:1 in a vertically vibrated container. An array transitional separation patterns between reversed Brazilian nut (RBN) and (BN) separations are observed, their geometrical features carefully measured. The particle system develops into either stable pattern when $f$ \ensuremath{\Gamma} relatively low or an oscillating high. We regard these as different phases, which can be divided phases...
We studied the separation behaviour of binary granular particles in a vertically vibrated container. The final particle system exhibited Brazil-Nut (BN) effect, though it was not complete. Particle convection occurred, and four different typical modes were observed when frequency f changed from 20 Hz to 80 at constant dimensionless acceleration Γ = 4πAf2/g. However, 2 4 f, system's mode stayed almost same. In our experiments, one type generally moved much faster than other, so former termed...
Optical refractive index (RI) sensors, with the advantages of fast response, resistance to electromagnetic interference, and more options for signal collection, are widely used in biological fields. Compared metallic nanoparticle RI sensors based on localized surface plasmon resonance (SPR), nonmetallic nanomaterial leaky resonant scattering have high sensitivity, large sensing volume, good reliability, suitability biosensing. However, so far studies less reported. In this work, we study...
Optical absorption enhancement in submicrometre silicon films with three types of nanotexturing arrays, i.e. a column-shaped nanohole (CLNH), and cone-shaped (CNNH) an inverted (I-CNNH) array, is studied via simulation. The ultimate efficiency, which function the type film thickness, array period filling fraction, optimized. We find that all CNNH (or I-CNNH) arrays same thickness period, ones having fraction equal to critical value 1 − π/12 correspond highest efficiencies. For given...
The optical absorption properties of a-Si:H have acquired much attention in solar cell(SC) research. In this paper, we studied enhancement light the a-Si:H(10%H) SCs with thicknesses from 31.25nm to 2μm and nano textures column-shaped nanohole (CLNH) array cone-shaped (CNNH) array, via Finite Difference Time Domain (FDTD) simulation. For a given type texture film thickness, d, ultimate efficiency, ideal efficiency without considering carrier combinations, is optimized over period, p, filling...
A mixture of 13X molecular sieve (13XMS) particles and glass with identical diameters is placed in a cylindrical container. Under vertical vibration, heavier tend to cluster are wrapped inside the convection 13XMS particles, resulting granular core phenomenon. The vibration frequency $f$ strongly influences particle modes. By contrast, effect dimensionless acceleration amplitude \ensuremath{\Gamma} can be neglected. For different ranges, classified as center-type ring-type cores. core, heavy...
In flexible perovskite solar cells, layer conductance reductions of constituent layers are found to be essential for PCE reduction due bending.
In a TiO2–perovskite heterojunction solar cell (TiO2–PHSC), besides the perovskite CH3NH3PbX3, TiO2 as one side of TiO2/CH3NH3PbX3 also plays an important role in photovoltaic effect. order to improve performance TiO2–PHSC with structure glass/FTO/compact TiO2/mesoporous TiO2/CH3NH3PbI3–xClx /poly-TPD (poly(N,N ′-bis(4-butylphenyl)-N,N ′-bis(phenyl)benzidine))/Au, 2 nanometer thick Cs2CO3 layer is thermally evaporated on mesoporous layer. The short-circuit current density (Jsc) raises from...
Recently, short channel effects (SCE) and power consumption dissipation problems impose tremendous challenges that need imperative actions to be taken deal with for field effect transistor further scale down as semiconductor technology enters into sub-10 nm node. From 3 node beyond, gate all around steps onto the history stage attributed its improved SCE suppressing ability thanks surrounding structure. Herein, we demonstrate super electrostatic control of a double-gated nanotube (DG NT...
We performed experiments to investigate the effects of simultaneous vertical vibration and rotation (around a axis) on binary particle system. In particular, frequency f, dimensionless acceleration Γ, angle velocity ω, total mass m system final separation results are investigated. The exhibited transitional Brazilian Nut (BN) patterns in both axial directions. coupling mechanisms determined spatial state. defined parameters λz λr between −1 for Complete Reversed BN (RBN) 1 describe states...