A5004875127- Advanced Thermoelectric Materials and Devices
- Luminescence Properties of Advanced Materials
- Chalcogenide Semiconductor Thin Films
- Medical Image Segmentation Techniques
- Thermal properties of materials
- Radiomics and Machine Learning in Medical Imaging
- Advanced Neural Network Applications
- Advanced Semiconductor Detectors and Materials
- Handwritten Text Recognition Techniques
- Perovskite Materials and Applications
- Glass properties and applications
- Generative Adversarial Networks and Image Synthesis
- Solid State Laser Technologies
- Inorganic Fluorides and Related Compounds
- Thermal Radiation and Cooling Technologies
- Advanced Photocatalysis Techniques
- Brain Tumor Detection and Classification
- Medical Imaging Techniques and Applications
- Face and Expression Recognition
- Radiation Detection and Scintillator Technologies
- Heusler alloys: electronic and magnetic properties
- Phase-change materials and chalcogenides
- Advanced X-ray and CT Imaging
- Machine Learning and ELM
- Microwave Dielectric Ceramics Synthesis
Xi’an Jiaotong-Liverpool University
2017-2025
University of Edinburgh
2020-2023
Zhejiang Medicine (China)
2021
Chinese Academy of Sciences
2013-2020
Ningbo Institute of Industrial Technology
2013-2020
Yancheng Teachers University
2020
Academia Sinica
2015
Nantong University
2015
Aalto University
2013-2014
Institució Catalana de Recerca i Estudis Avançats
2013
The Ba<sub>9</sub>Lu<sub>2</sub>Si<sub>6</sub>O<sub>24</sub>:Ce<sup>3+</sup>cyan phosphor has excellent luminescence properties and displays promising application in NUV-based white LEDs with high performance.
Among the inorganic phosphors used in advanced solid‐state lighting technologies, nitridosilicates have drawn significant attention because of their superior photoluminescence properties with high efficiency and thermal stabilities. However, synthesis nitride usually requires strict processing conditions a long time, leading to very manufacturing costs. Herein, novel orthosilicate green phosphor, Ba 9 Lu 2 Si 6 O 24 :Ce 3+ , is synthesized via simple reaction. The characterization identifies...
Mn alloying in SnTe increases the band gap and decreases energy separation between light heavy hole valence bands, leading to a significant enhancement Seebeck coefficient. The maximum <italic>ZT</italic> of ~1.25 is found at 920 K for p-type SnMn<sub>0.07</sub>Te.
We report on the reduction of thermal conductivity in ultra-thin suspended Si membranes with high crystalline quality. A series thicknesses ranging from 9 nm to 1.5 μm was investigated using Raman thermometry, a novel contactless technique for determination. systematic decrease observed as reducing thickness, which is explained Fuchs-Sondheimer model through influence phonon boundary scattering at surfaces. The thinnest membrane d = resulted (9 ± 2) W/mK, thus approaching amorphous limit but...
The power factor was significantly enhanced benefiting from texture modulation, resulting in a<italic>ZT</italic>of ∼1.0 p-type polycrystalline SnSe.
N-type SnSe compound has been synthesized through melting with spark plasma sintering. By doping BiCl3, the carrier concentration of is significantly increased, leading to a large enhancement electrical conductivity. Meanwhile, SnSe0.95-BiCl3 samples also exhibit higher Seebeck coefficient and lower lattice thermal conductivity, compared polycrystalline SnSe. Consequently, high power factor ∼5 μW cm−1 K−2 ZT 0.7 have achieved at 793 K. The synergistic roles BiCl3 in provide many...
We report an enhanced thermoelectric performance by manipulating band engineering in Mn–In codoped SnTe. It has been revealed that SnTe is a unique example achieving the synergy of convergence and resonant state. According to theory, favors heavy doping, while state light doping. Following this idea, series samples are prepared hot pressing. A significantly Seebeck coefficient 116 μV K–1 at 300 K observed Sn0.915Mn0.11In0.005Te. By carefully tuning structure solid solution, we achieve high...
Tb3+-doped phosphors are widely used in fluorescent lamps and plasma display panels (PDP) due to the strong vacuum ultraviolet (VUV)/UV light absorption of Tb3+. Most these fluorides. The quantum efficiency (QE) is more than 90%; however, it still too low. Theoretically, one VUV/UV photon can convert two visible photons or by cutting (QC), QE reach 200% more. Usually, oxides have a higher In this work, we obtained novel oxide phosphor Ba9Lu2Si6O24:Tb3+ (BLS:Tb3+). Under 251 nm UV-light...
Session-based recommender systems have attracted much attention recently. To capture the sequential dependencies, existing methods resort either to data augmentation techniques or left-to-right style autoregressive training. Since these are aimed model nature of user behaviors, they ignore future a target interaction when constructing prediction for it. However, we argue that interactions after interaction, which also available during training, provide valuable signal on preference and can...
The thermoelectric properties of two-dimensional graphyne sheets are investigated by using first-principles calculations and the Boltzmann transport equation method.
A new red-emitting phosphor, Ce3+–Mn2+ codoped Ba9Lu2Si6O24 was synthesized by using solid-state reactions. The phase formation, luminescence properties, energy transfer mechanisms, and thermal stabilities were investigated. Under the near-ultraviolet excitation, Ba9Lu2Si6O24:Ce3+,xMn2+ shows a tunable emission from blue-violet to red. When x = 0.08, photoluminescence characterized major peak at 610 nm with an internal quantum efficiency of about 70%. Ce3+ Mn2+ further enhanced self-charge...
Deep learning (DL) based image processing methods have been successfully applied to low-dose x-ray images on the assumption that feature distribution of training data is consistent with test data. However, computed tomography (LDCT) from different commercial scanners may contain amounts and types noise, violating this assumption. Moreover, in application DL LDCT, distributions LDCT simulation clinical CT examination can be quite different. Therefore, network models trained simulated or one...
We report on fabrication and characterization of ultra-thin suspended single crystalline flat silicon membranes with thickness down to 6 nm. have developed a method control the strain in by adding compensating frame membrane perimeter avoid buckling after release. show that changing properties can be tuned controlled manner. Consequently, both mechanical band structure engineered, resulting provide unique laboratory study low-dimensional electronic, photonic, phononic phenomena.
α‐MgAgSb is recently discovered to be a new class of thermoelectric material near room temperature. A competitive ZT 1.4 at 525 K achieved in Ni‐doped α‐MgAgSb, and the measured efficiency energy conversion reaches record value 8.5%, which even higher than that commercially applied bismuth telluride. On other hand, band structure believed unprofitable power factor, owing less degenerate valence valleys. Here, this paper reports systematic theoretical study on properties by using...
P-type Bi0.48Sb1.52Te3 alloys added with WSe2 were achieved via the zone melting method. The electrical performance was improved due to increased carrier concentration, while lattice thermal conductivity simultaneously decreased, mainly numerous types of nanoprecipitates produced, such as second phase, antisite substitution and interfaces different scales. As a result, 23% improvement in thermoelectric figure merit zT obtained addition WSe2, making these composites more attractive for...
By using a two-step solid-state reaction to synthesize the yellow-persistent Gd3Al2Ga3O12:Ce3+ phosphor, both luminescence and afterglow properties were greatly enhanced. Its internal quantum efficiency reaches as high 81.9%, indicating its promising application in reducing flicker effect AC-LED-based white light systems.
Synergistic effect of band convergence and resonant level could be manipulated in SnTe by co-doping In Hg, leading to a potential thermoelectric performance enhancement much wider temperature range. this work we carefully investigated properties the In-Hg co-doped SnTe, synthesized hot pressing method. With Seebeck coefficients samples were greatly improved (over 50 μVK−1) at room temperature. Although power factors also able optimized, peak ZT (0.9 850 K Sn0.98Bi0.02Te-1%HgInTe2), however,...
A series of SnTe-AgSbSe2 composites were synthesized by a zone-melting method. The nanostructure the was determined high resolution transmission electron microscope. results show that lattice thermal conductivity is decreased to ∼0.6 W/m·K at 820 K due intense scattering phonon. Also, carrier concentration increases with AgSbSe2 amounts, and large effective mass ∼ 4m0 room temperature appears ∼2 × 1021/cm3. relatively thermoelectric figure merit ZT 0.92 obtained composition optimization. It...
We report the synergistic optimization of thermoelectric properties in p-type Bi0.48Sb1.52Te3 by additional graphene. Highly dense + graphene (x wt%, x = 0, 0.05, 0.1 and 0.15) composites have been synthesized zone-melting followed spark plasma sintering. With help scanning electron microscopy, has clearly observed at edge grain composites. Due to graphene, show an improved power factor 4.8 × 10−3 Wm−1K−2 with modified carrier concentration suppressed lattice thermal conductivity....
Partial shading is an unavoidable complication in the field of photovoltaic (PV) generation. Bypass diodes have become a standard feature solar cell arrays to improve array performance under partial scenarios (PSS). However, current-voltage and power-voltage characteristic data vary with different patterns. In this paper, pattern detection algorithm first proposed estimate number shaded modules PV string. The result then fed field-support vector regression (F-SVR) model, which measured...
Purpose The low‐dose computed tomography (CT) imaging can reduce the damage caused by x‐ray radiation to human body. However, CT images have a different degree of artifacts than conventional images, and their resolution is lower that which affect disease diagnosis clinicians. Therefore, methods for noise‐level reduction improvement in inevitably become research hotspot field imaging. Methods In this paper, residual attention modules (RAMs) are incorporated into encoder–decoder convolutional...