A5100448071- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Luminescence Properties of Advanced Materials
- Radar Systems and Signal Processing
- Organic Light-Emitting Diodes Research
- Direction-of-Arrival Estimation Techniques
- Target Tracking and Data Fusion in Sensor Networks
- Indoor and Outdoor Localization Technologies
- Speech and Audio Processing
- Advanced Adaptive Filtering Techniques
- 2D Materials and Applications
- Sparse and Compressive Sensing Techniques
- Advanced SAR Imaging Techniques
- Inertial Sensor and Navigation
- Water Systems and Optimization
- Sensor Technology and Measurement Systems
- Cognitive Science and Education Research
- Advanced MEMS and NEMS Technologies
- Numerical methods in engineering
- Acoustic Wave Phenomena Research
- Nanowire Synthesis and Applications
- Structural Health Monitoring Techniques
- Computational Drug Discovery Methods
- Optical properties and cooling technologies in crystalline materials
- Medical Imaging and Analysis
Xidian University
2018-2024
Shanghai Jiao Tong University
2019-2024
Hefei University of Technology
2022
Wuhan Institute of Technology
2020
Beijing Jishuitan Hospital
2017
Huazhong University of Science and Technology
2016
Henan University of Science and Technology
2016
Ordnance Engineering College
2010
Yantai University
2010
Tianjin University of Finance and Economics
2006
Micro light-emitting diodes (μ-LEDs) coupled to color conversion phosphors are among the most promising technologies for future display and artificial light sources. However, current emitters suffer from excessively large particle sizes, preventing micron-scale processability, and/or low stability that hampers device lifetime. Here, we demonstrate down-conversion μ-LED based on CsPbBr3 perovskite nanocrystals directly grown inside perfectly sealed mesoporous silica nanospheres (NSs). Key...
Sn-based perovskites are the most promising alternative materials for Pb-based to address toxicity problem of lead. However, development SnII -based has been hindered by their extreme instability. Here, we synthesized efficient and stable lead-free Cs4 SnBr6 perovskite using SnF2 as tin source instead easily oxidized SnBr2 . The configures a fluorine-rich environment, which can not only suppress oxidation Sn2+ in synthesis, but also construct chemically Sn-F coordination hinder electron...
Recently, two-dimensional colloidal perovskite nanoplatelets (NPLs) have attracted great attention as one of the most promising candidate blue emitters due to their large exciton binding energy and precisely tunable thickness. However, lack techniques simultaneously obtain highly emissive stable NPLs has limited successful exploitation efficient NPL-based optoelectronic devices. Herein, we report surface ligand-engineering strategy enhance photoluminescence quantum yields stability using a...
Abstract For the display applications of perovskite nanocrystals (NCs), photoluminescence quantum yield (PLQY), emission linewidth, and operational stability are main parameters that directly affect performance optoelectronic device. High‐temperature solid‐state synthesis has been regarded as an eco‐friendlier process to prepare NCs than colloidal synthesis. However, it is relatively difficult control sizes size distribution at high temperatures, which usually results in a lower PLQY wider...
For next-generation high-definition displays, the newly recommendation 2020 (Rec. 2020) standard calls for emission wavelength of green emitters to be kept at 525–535 nm with narrow line width below 25 nm. All-inorganic lead halide perovskite CsPbBr3 nanocrystals (NCs) sharp seem as prefect one match call, however, it is a great challenge tune their target window because intrinsic band gap CsPbBr3. Herein, we report facile strategy prepare NCs finely tunable emissions in range by...
Lead halide perovskite nanocrystals as promising ultrapure emitters are outstanding candidates for next-generation light-emitting diodes (LEDs) and display applications, but the thermal quenching behavior of light emission has severely hampered their real-world applications. Here, we report an anion passivation strategy to suppress CsPbBr3 nanocrystals. By treating with specific anions (such SO42-, OH-, F- ions), corresponding wide-bandgap layers, PbSO4, Pb(OH)2, PbF2, were obtained. They...
Owing to outstanding optoelectronic properties, lead halide perovskite nanocrystals (PNCs) are considered promising emitters for next-generation displays. However, the development of pure blue (460-470 nm) nanocrystal light-emitting diodes (PNC-LEDs), which correspond requirements Rec. 2020 standard, lag far behind that their green and red counterparts. Here, CsPb(Br/Cl)3 with remarkable optical performance demonstrated by a facile fluorine passivation strategy. Prominently, on vacancies...
For the further development of sodium-ion batteries (SIBs), it is very important to research and develop low-cost high-performance anode materials. Though hard carbon has high theoretical capacity for SIBs, nevertheless, in practical applications, presents low conductivity, poor electrochemical stability, slow kinetics. In this research, a N-doped biomass carbon/reduced graphene oxide (NC/RGO) composite facilely constructed by pyrolyzing cellulose, chitosan, GO. The NC/RGO shows highly...
Nickel oxides exhibit a great potential as hole transport layers for the fabrication of efficient perovskite light-emitting diodes (LEDs) due to their high carrier mobility and good energy band matching with nanocrystals. In this work, nickel were directly decorated on CsPbBr3 nanocrystal surface through adsorption sequential oxidation treatment. The resulting sample shows photoluminescence quantum-yield 82%. LED using nanocrystals achieves external quantum efficiency (EQE) up 16.8% low...
Abstract In this article, we propose a new discontinuous finite volume element (DFVE) method for the second‐order elliptic problems. We treat DFVE as perturbation of interior penalty and get superapproximation estimate in mesh dependent norm between solution that method. This reveals is much closer to than have known. By using estimate, can easily optimal order error estimates L 2 ‐norm maximum norms method.© 2010 Wiley Periodicals, Inc. Numer Methods Partial Differential Eq 28: 425–440, 2012
This letter investigates the problem of locating a moving target using bistatic range (BR) and rate (BRR) measurements in multi-input multi-output (MIMO) radar systems. The proposed estimator constructs two separate semidefinite programming (SDP) problems, which both BR BRR measurement noise powers can be neglected. By utilizing optimization toolbox, we efficiently solve SDP problems give source position velocity successively. Unlike traditional techniques, method does not require exact...
By exploiting the relationship between probability density and differential geometry structure of received data geodesic distance, recently proposed information (IG) method can provide higher accuracy resolution ability for direction arrival (DOA) estimation than many existing methods. However, its performance is not robust even high signal-to-noise ratio. To have a deep understanding unstable performance, theoretical analysis IG presented by deriving cost function number array elements,...
This paper presents an efficient two-dimensional (2D) direction of arrival (DOA) estimation method, termed as decoupled projected atomic norm minimization (D-PANM), to solve the angle-ambiguity problem. It first introduces a novel metric via projecting original atom set onto smoothing space, based on which we formulate equivalent semi-definite programming (SDP) Then, two relatively low-complexity Toeplitz matrices can be obtained estimate DOAs. We further exploit structural information...
As known, utilization of the information about signal waveforms can improve direction-of-arrival (DOA) estimation results. However, with a fast moving platform, Doppler effect occurs, which distorts known and may result in large DOA bias even errors for conventional methods sources waveforms. To deal this problem, robust method against shifts is developed. The proposed first transforms nonlinear mixing model to an approximately linear one using discrete-time Fourier transform finite Taylor...
Inverted perovskite nanocrystal light-emitting diodes with average 61% transmittance have been achieved PFN as electron transport layer.
Calcium and fluorine ions combined-passivation perovskite nanocrystals through a room-temperature triple-ligand method exhibit excellent photostability, thermal-resistance light-emitting diodes performance.
This paper proposes a superresolution two‐dimensional (2D) direction of arrival (DOA) estimation algorithm for rectangular array based on the optimization atomic norm and series relaxation formulations. The response describes minimum number sources, which is derived from minimization (ANM) problem. However, resolution restricted high computational complexity incurred by using ANM 2D angle estimation. Although an improved named decoupled (DAM) has reduced burden, still relatively low in terms...
Abstract Sn‐based perovskites are the most promising alternative materials for Pb‐based to address toxicity problem of lead. However, development Sn II ‐based has been hindered by their extreme instability. Here, we synthesized efficient and stable lead‐free Cs 4 SnBr 6 perovskite using SnF 2 as tin source instead easily oxidized . The configures a fluorine‐rich environment, which can not only suppress oxidation 2+ in synthesis, but also construct chemically Sn−F coordination hinder electron...
3-D target localization based on multi-input and multioutput radar systems is studied in this letter by utilizing time delay angle of arrival measurements, which can be obtained some local sensor signal processing methods. For such a positioning problem, the typical closed-form solution first establishes pseudolinear equation then, applies weighted least squares (WLS) technique to determine final position. However, WLS often suffers from performance degradation when noise large. To alleviate...
For direction of arrival (DOA) estimation with known waveform information, a larger number snapshots and longer duration the waveforms, required storage space for hardware implementation will increase. To save resources also reduce response time array system, DOA problem short waveforms in snapshot size is studied this paper. We first establish connection between sources structured least squares (SLS) technique utilizing potential rotation invariant property. Next, constraint formulated then...
A schematic diagram of the device principle a wavelength sensor consisting two horizontally stacked MLG/Ge heterojunctions and wavelength-dependent photocurrent ratio at different thicknesses PD1.