A5100711463- Perovskite Materials and Applications
- Advanced Welding Techniques Analysis
- Welding Techniques and Residual Stresses
- Conducting polymers and applications
- Aluminum Alloy Microstructure Properties
- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Metal Forming Simulation Techniques
- Gas Sensing Nanomaterials and Sensors
- ZnO doping and properties
- Aluminum Alloys Composites Properties
- Organic Light-Emitting Diodes Research
- Graphene research and applications
- Metallurgy and Material Forming
- Carbon Nanotubes in Composites
- High-Velocity Impact and Material Behavior
- Fatigue and fracture mechanics
- Advanced Fiber Optic Sensors
- Metal and Thin Film Mechanics
- Microstructure and mechanical properties
- Metal Alloys Wear and Properties
- Laser and Thermal Forming Techniques
- Photonic and Optical Devices
- Transition Metal Oxide Nanomaterials
- Surface Treatment and Residual Stress
Beijing Information Science & Technology University
2007-2024
Dalian Jiaotong University
2007-2021
Henan Normal University
2018
Xinxiang University
2018
State Key Laboratory on Integrated Optoelectronics
2010
Technical Institute of Physics and Chemistry
2010
Beijing Institute of Technology
2010
Beijing University of Posts and Telecommunications
2009-2010
Beijing National Laboratory for Molecular Sciences
2009
Peking University
2009
The hole blocking layer plays an important role in suppressing recombination of holes and electrons between the perovskite fluorine-doped tin oxide (FTO). Morphological defects, such as cracks, at compact TiO2 due to rough FTO surface seriously affect performance solar cells (PSCs). Herein, we employ a simple spin-coating SnO2 thin film solution cover cracks for PSCs. experiment results indicate that TiO2/SnO2 complementary composite could eliminate serious electrical current leakage...
A layered nanosphere structured NiO catalyst was successfully synthesized by a simple and efficient hydrothermal method as cathode material for lithium-oxygen (Li-O2) batteries. Cyclic voltammetry (CV), dual electrode (DECV) chronoamperometry (CA) rotating ring-disk (RRDE) were carried out to investigate the catalytic activity of this oxygen evolution reaction (OER). The results revealed that exhibited excellent electrochemical performance, stability typical four-electron electrocatalyst...
High-performance perovskite solar cells are strongly dependent on the quality of layer. Two-step sequential deposition CH3NH3PbI3 (MAPbI3) films is widely used to fabricate and many factors influence films, such as delay time before annealing MAI-PbI2-DMSO intermediate phase, which would impact morphology photo-physical properties thin films. Here, experimental research indicates that phase quality, crystallinity, film crucial. During process, plays an important role in nucleation process...
Atomic force microscopy (AFM), high resolution transmission electron microscopy, and Raman spectroscopy were used to study the assembling structure of thin bundles containing only a few single-walled carbon nanotubes (SWCNTs). The normal close-packed as well two novel kinds including spiral ribbon-like observed for both free-standing SWCNTs on substrates. Molecular mechanics calculation was employed energetic competition between these three types bundles. It found that are metastable...
Lead nitrate mixed with alkali in solution generates insoluble precipitates. The morphology and microstructure of the precipitates are dramatically influenced by chloride anion concentration lead precursor solution. To intensively investigate effect concentration, we performed a series controllable experiments different concentrations anions (the ratios Pb2+ : Cl− = 1 0, 0.2, 0.5, 1, 2, 3 solution) at temperatures 90 80 °C. results reveal that, increasing anions, colour changes from yellow...
Perovskite thin films with excellent optical semiconductor and crystallization properties superior surface morphology are normally considered to be vital perovskite solar cells (PSCs). In this paper, we systematically survey the process of modulating methylammonium lead iodide film by controlling doping K⁺ for PSC prepared in air propose mechanism large K⁺-doped grain formation related speed. The increase speed leads production grains without localized-solvent-vapor (LSV) pores via moderate...
We present a simple method to synthesize Pb(OH)2 nanorods by solution-phase reaction. Rod-like lead hydroxide precipitates are obtained mixing nitrate with concentration of about 0.01 M and potassium 0.03 in an aqueous solution. Sodium chloride as additive is premixed the The presence ions precursor solution results rod-like morphology precipitates. growth mechanism discussed.
The electron transport layer (ETL) is critical to carrier extraction for perovskite solar cells (PSCs). Moreover, the morphology and surface condition of ETL could influence topography layer. ZnO, TiO2, SnO2 were widely investigated as materials. However, TiO2 requires a sintering process under high temperature ZnO has trouble chemical instability. possesses advantages low-temperature fabrication conductivity, which performance PSCs prepared low temperature. Here, we optimized property by...
In recent years, flexible perovskite solar cells have drawn tremendous attention in the field of wearable devices, and optimization composition plays an important role improving film quality photophysical properties. At present, some researchers only studied A-site organic cations mixing or X-site halide anions ABX3 structure perovskite, but there are few reports on co-mixing ions cells. this paper, we mainly try to study effects different concentrations mixed formamidine methylamine...
The 5A06 aluminium alloy is widely used in the aerospace industry, owing to its good corrosion resistance and excellent weldability. tensile strength of this material welded joint can reach 90% that base alloy. However, when applications, thermal cycling conditions affect mechanical performance In paper, deterioration properties damage mechanism under were investigated. was examined after test. microstructural changes fracture analysed. Results show induce more severe than particles formed...
A simple and effective electrochemical deposition method to fabricate lead oxide micro-octahedrons is reported. Unlike previous reports in which the current densities of were normally not more than 5 mA/cm 2 resulted flakes, our process improved 15 results micro-octahedrons. Our indicated that well-shaped could form at range 15–25 .
In this paper, we report a fiber optic microphone with large dynamic range. The probe of consists bi-fiber Fabry-Perot cavity architecture. wavelength the working laser is about 1552.05nm. At wavelength, interference spectroscopies these two cavities have quadrature shift. So outputs sensors are orthogonal signal. By using signal demodulation method, can output acoustic wave. Due to no relationship between and linear region on spectroscopy, microphones maximum pressure above 125dB.
Abstract The preparation of a high-performance hole transport layer is pivotal factor in achieving efficiency and stable perovskite solar cells. 2,2’,7,7’-Tetrakis[N, N-di(4-methoxyphenyl)amino]−9,9’-spirobifluorene (Spiro-OMeTAD) currently stands as the most widely employed material current methodologies for its primarily revolve around three techniques: O 2 oxidation, cobalt salt doping, CO bubbled doping. In this study, we systematically investigated analyzed Spiro-OMeTAD prepared through...
By adding an appropriate proportion of DMS to the anti-solvent, DMSO remaining in tin-based perovskite films can be effectively extracted, resulting with better crystallography, and devices have lower trap densities.
Using finite element method, the residual stress distribution of TIG dressed welded toe followed by spray treatment with different cooling intensity was calculated. And stresses were also measured using blind-hole method. The results indicate that increase intensity, longitudinal in are gradually transited from tensile to compressive ones, and there is no significant change for transverse stresses, depth layer increases at region.
The negative temperature field with a certain strength is exerted on the TIG dressing zone in welding toes, which could decrease and offset residual stress. When of or above 450 °C, chilling treatment produce stress biaxial compression. performed when 550 °C. fatigue joints can be increased more than twice comparing those after welding.
It is crucial to find a good material as hole transport layer (HTL) improve the performance of perovskite solar cells (PSCs), devices with an inverted structure. Polyethylene dioxythiophene-poly (styrene sulfonate) (PEDOT:PSS) and inorganic nickel oxide (NiOx) have become hotspots in study materials PSCs on account their excellent properties. In our research, NiOx PEDOT: PSS, two kinds materials, were prepared compared impact bottom light absorption morphology layer. By way, some...