A5077906770- Ferroelectric and Piezoelectric Materials
- Multiferroics and related materials
- Acoustic Wave Resonator Technologies
- Advanced Photocatalysis Techniques
- Dielectric materials and actuators
- Microwave Dielectric Ceramics Synthesis
- Electronic and Structural Properties of Oxides
- 2D Materials and Applications
- Perovskite Materials and Applications
- Dielectric properties of ceramics
- Gas Sensing Nanomaterials and Sensors
- Advanced Sensor and Energy Harvesting Materials
- Glass properties and applications
- ZnO doping and properties
- Ferroelectric and Negative Capacitance Devices
- Ultrasonics and Acoustic Wave Propagation
- Advanced Battery Materials and Technologies
- Nuclear materials and radiation effects
- Semiconductor materials and devices
- Luminescence Properties of Advanced Materials
- Chalcogenide Semiconductor Thin Films
- Advancements in Battery Materials
- Thermodynamic and Structural Properties of Metals and Alloys
- Advanced Battery Technologies Research
- Science and Science Education
Wuhan National Laboratory for Optoelectronics
2021-2024
Huazhong University of Science and Technology
2018-2024
Northwest University
2016-2024
Chinese Academy of Medical Sciences & Peking Union Medical College
2024
Wuhan University of Technology
2021-2024
Sandia National Laboratories
2023
Shanghai Jiao Tong University
2012-2022
University of Warwick
2018-2022
Australian National University
2017-2019
Sandia National Laboratories California
2017-2018
Stimulated by the excellent colossal permittivity (CP) behavior achieved in In+Nb co-doped rutile TiO2, this work we investigate CP of Ga and Nb i.e., (Ga0.5Nb0.5)xTi1–xO2, where Ga3+ is from same group as In3+ but with a much smaller ionic radius. Colossal up to 104–105 an acceptably low dielectric loss (tan δ = 0.05–0.1) over broad frequency/temperature ranges obtained at x 0.5% after systematic synthesis optimizations. Systematic structural, defect, characterizations suggest that multiple...
Currently, various electronic devices make our life more and safe, healthy, comfortable, but at the same time, they produce a large amount of nondegradable nonrecyclable waste that threatens environment. In this work, we explore an environmentally friendly flexible mechanical sensor is biodegradable recyclable. The consists bacterial cellulose (BC) hydrogel as matrix imidazolium perchlorate (ImClO4) molecular ferroelectric functional element, hybrid which possesses high sensitivity 4 mV...
Electron-pinned defect dipoles, in the form of highly stable triangle-diamond and/or triangle-linear dopant clusters with well defined relative positions for Ti reduction, are present rutile In + Ta co-doped TiO<sub>2</sub> colossal permittivity and low loss.
The diode and photovoltaic effects of BiFeO3 Bi0.9Sr0.1FeO3−δ polycrystalline thin films were investigated by poling the with increased magnitude alternating direction. It was found that both electromigration oxygen vacancies polarization flipping are able to induce switchable effects. For high vacancy concentration, reversibly can be observed due under an electric field much lower than its coercive field. However, for pure effect is hard detect until occurrence flipping. explained well...
Defect-engineered perovskite oxides that exhibit ferroelectric and photovoltaic properties are promising multifunctional materials. Though introducing gap states by transition metal doping on the B-site can obtain low bandgap (i.e., 1.1-3.8 eV), electrically leaky generally lose piezoelectricity mainly due to oxygen vacancies. Therefore, development of highly piezoelectric semiconductor remains challenging. Here, inspired point-defect-mediated large in ferroelectrics especially at...
Although excellent dielectric, piezoelectric, and pyroelectric properties matched with or even surpassing those of ferroelectric ceramics have been recently discovered in molecular ferroelectrics, their successful applications devices are scarce. The fracture proneness ferroelectrics under mechanical loading precludes as flexible sensors bulk crystalline form. Here, self-powered prepared from the facile deposition [C(NH2 )3 ]ClO4 onto a porous polyurethane (PU) matrix reported. -PU is...
Large-scale multi-heterostructure and optimal band alignment are significantly challenging but vital for photoelectrochemical (PEC)-type photodetector water splitting. Herein, the centimeter-scale bismuth chalcogenides-based cascade heterostructure is successfully synthesized by a sequential vapor phase deposition method. The multi-staggered of Bi2 Te3 /Bi2 Se3 S3 optimized verified X-ray photoelectron spectroscopy. PEC photodetectors based on these heterostructures demonstrate highest...
To mimic the natural photosynthesis system, a Z-scheme heterostructure is proposed as viable and effective strategy for efficient solar energy utilization such photocatalysis photoelectrochemical (PEC) water splitting due to high carrier separation efficiency, fast charge transport, strong redox, wide light absorption. However, it remains huge challenge form direct internal electric-field restriction vital band-alignment at interface. Herein, van der Waals based on allotrope SnSe2 SnSe...
Electrostatic energy storage technology based on dielectrics is the basis of advanced electronics and high-power electrical systems. High polarization (<i>P</i>) high electric breakdown strength (<i>E</i><sub>b</sub>) are key parameters for dielectric materials to achieve superior performance. In this work, a composite strategy antiferroelectric (AFEs) has been proposed improve Here, AlN selected as second phase...
This work investigates the synthesis, chemical composition, defect structures and associated dielectric properties of (Mg2+, Ta5+) co-doped rutile TiO2 polycrystalline ceramics with nominal compositions (Mg2+1/3Ta5+2/3) x Ti1-x O2. Colossal permittivity (>7000) a low loss (e.g. 0.002 at 1 kHz) across broad frequency/temperature range can be achieved = 0.5% after careful optimization process conditions. Both experimental theoretical evidence indicates such colossal intrinsically originate...
Abstract The construction of nanostructured Z‐scheme heterostructure is a powerful strategy for realizing high‐performance photoelectrochemical (PEC) devices such as self‐powered photodetectors and water splitting. Considering the band structure internal electric field direction, BiVO 4 promising candidate to construct SnS 2 ‐based heterostructure. Herein, direct vertically oriented nanosheet on nanoflower rationally fabricated efficient PEC photodetectors. identified by ultraviolet...
The photovoltaic effect of BiVO4 semiconductor was investigated by incorporating an ultrathin BiFeO3 ferroelectric layer. It is found that the layer with strong self-polarization and high carrier density desirable to enhance manipulate polarity semiconductors. photovoltage increases 5-fold 1 V, photocurrent 2-fold 140 μA/cm(2), in which highest compared reported values polycrystalline epitaxial thin film solar cells. mechanism for observed discussed on basis a polarization-induced...
Al-PTFE (Al-polytetrafluoroethene) is an important kind of Reactive Material (RM), however only limited importance was placed to the effect crystallinity PTFE on mechanical and reactive behavior. This paper investigated influence compression behavior at strain rates range from 10-2 3 × 10³ s-1. Two kinds samples were prepared by different sintering procedures acquire crystallinity. The samples' characterized density method X-ray diffraction method. tested using electro-hydraulic press for...
Van der Waals heterostructures have great potential for the emerging self-powered photoelectrochemical photodetectors due to their outstanding photoelectric conversion capability and efficient interfacial carrier transportation. By considering band alignment, structural design, growth optimization, of vertically oriented SnS2 with different densities on MoS2 nanosheets are designed fabricated using a two-step epitaxial method. Compared SnS2, MoS2, low density-vertical SnS2/MoS2...