A5007888783- 2D Materials and Applications
- Perovskite Materials and Applications
- Ga2O3 and related materials
- GaN-based semiconductor devices and materials
- Quantum Dots Synthesis And Properties
- Graphene research and applications
- ZnO doping and properties
- Semiconductor materials and devices
- MXene and MAX Phase Materials
- Photonic Crystal and Fiber Optics
- Advanced Fiber Laser Technologies
- Multiferroics and related materials
- Advanced Memory and Neural Computing
- Nanowire Synthesis and Applications
- Chalcogenide Semiconductor Thin Films
- Ferroelectric and Negative Capacitance Devices
- Advanced Thermoelectric Materials and Devices
- Conducting polymers and applications
- Laser-Matter Interactions and Applications
- Metal and Thin Film Mechanics
- Radiomics and Machine Learning in Medical Imaging
- Advanced Photocatalysis Techniques
- Polyoxometalates: Synthesis and Applications
- Advanced Fiber Optic Sensors
- Ferroelectric and Piezoelectric Materials
Shenzhen University
2018-2025
Shandong Normal University
2021-2023
University of Electronic Science and Technology of China
2021
Chongqing University
2021
Zhengzhou University
2021
Shanghai Normal University
2021
Peking University
2013-2019
Institute of Microelectronics
2018
State Council of the People's Republic of China
2016
Inner Mongolia Normal University
2015
Two-dimensional (2D) semiconductors are very promising channel materials in next-generation field effect transistors (FETs) due to the enhanced gate electrostatics and smooth surface. Two new 2D materials, arsenene antimonene (As Sb analogues of graphene), have been fabricated recently. Here, we provide first investigation many-body effect, carrier mobility, device performance monolayer (ML) hexagonal based on accurate ab initio methods. The quasi-particle band gaps ML by using GW...
Graphdiyne (GDY), a newly emerging 2D carbon allotrope, has been widely explored in various fields owing to its outstanding electronic properties such as the intrinsic bandgap and high carrier mobility. Herein, GDY-based photoelectrochemical-type photodetection is realized by spin-coating ultrathin GDY nanosheets onto flexible poly(ethylene terephthalate) (PET) substrates. The photodetectors (PDs) demonstrate excellent photo-responsive behaviors with photocurrent (Pph , 5.98 µA cm-2 ),...
Non-layered tellurium (Te) is a promising material for applications in transistor and optoelectronic devices its advantages excellent intrinsic electronic properties. However, the poor photodetection performance relatively uncertain stability of tellurene under ambient conditions greatly limit practical applications. In order to improve tellurene-based materials, Te@Se roll-to-roll nanotubes with different selenium (Se) contents synthesized by epitaxial growth Se on Te are, first time,...
Abstract Two-dimensional molecular crystals, consisting of zero-dimensional molecules, are very appealing due to their novel physical properties. However, they mostly limited organic molecules. The synthesis inorganic version two-dimensional crystals is still a challenge the difficulties in controlling crystal phase and growth plane. Here, we design passivator-assisted vapor deposition method for Sb 2 O 3 as thin monolayer. passivator can prevent heterophase nucleation suppress low-energy...
2D nonlayered materials have attracted intensive attention due to their unique surface structure and novel physical properties. However, it is still a great challenge realize the planar structures of owing naturally intrinsic covalent bonds. Ge one them with cubic impeding its anisotropic growth. Here, ultrathin single-crystalline flakes as thin 8.5 nm were realized via halide-assisted self-limited CVD The growth mechanism has been confirmed by experiments theoretical calculations, which can...
Abstract 2D nonlayered materials that possess appealing properties are entering the researchers' vision. However, direct access to level of these is still a great challenge due instrinsic isotropic chemical bond. This work presents initially self‐limited epitaxial growth ultrathin CdS flakes (as thin as 6 nm) on mica substrate with large domain size (>40 µm) by employing In 2 S 3 passivation agent. Besides, thickness and sizes products could be tunable addition amount. The mechanism...
To enhance the low hole mobility (∼40 cm2 V-1 s-1) of InSe monolayer, a novel two-dimensional (2D) van der Waals heterostructure made and black phosphorus (BP) monolayers with high (∼103 has been constructed its structural electronic properties are investigated using first-principles calculations. We find that InSe/BP exhibits direct band gap 1.39 eV type-II alignment electrons (holes) located in layer. The offsets BP 0.78 for conduction minimum 0.86 valence maximum, respectively....
Nanocrystals (NCs) with identical components and sizes but different crystal structures could not be distinguished by conventional absorption emission spectra. Herein, we find that circular dichroism (CD) spectroscopy can easily distinguish the CdSe nanoplatelets (NPLs) of wurtzite (WZ) zincblende (ZB) help chiral l- or d-cysteine ligands. In particular, CD signs first excitonic transitions in WZ ZB NPLs capped same cysteine are opposite. Theoretic calculation supports viewpoint surfaces...
The recent advances in 2D ferromagnets are reviewed, including materials synthesis, ferromagnetism modulation, physical properties, and potential device applications.
The successful implementation of perovskite light-emitting diodes (PeLEDs) in advanced displays and lighting has proven to be challenging because the inferior performance blue devices. Here, we point out that a strained system would lead quasi-degenerate energy state enhance excited-state transition due formation double-polarized channel. tensile structure also brings about synergetic control carrier dynamics virtue lattice deformation reduced dimensional phase regulation promote population...
2D transition metal dichalcogenides (TMDs) are promising candidates for realizing ultrathin and high-performance photovoltaic devices. However, the external quantum efficiency (EQE) power conversion (PCE) of most devices face great challenges in exceeding 50% 3%, respectively, due to low photocarrier separation collection. Here, this study demonstrates with defect-free interface recombination-free channel based on WS2 , showing high EQE 92% approaching theoretical limit PCE 5.0%. The...
Keggin-type polyoxometalate (POM) cluster based non-volatile memory has been investigated, and the molecular reconfiguration induced by reduction process of POM molecules is proposed to initialize resistive switching behavior.
Electrides constitute a unique class of materials that can be developed as conventional superconductors with diverse dimensional superconductivity. However, the transition temperatures $({T}_{c})$ electride are generally low and promoting their ${T}_{c}$ usually requires extremely high external pressures formidable for practical applications. Here, based on first-principles calculations, we proposed recently reported electride, ${\mathrm{Be}}_{2}\mathrm{N}$, exhibit two-dimensional (2D)...
Van der Waals (vdW)-integrated heterojunctions have been widely investigated in optoelectronics due to their superior photoelectric conversion capability. In this work, 0D bismuth quantum dots (Bi QDs)-decorated 1D tellurium nanotubes (Te NTs) vdW (Te@Bi vdWHs) are constructed by a facile bottom-up assembly process. Transient absorption spectroscopy suggests that Te@Bi vdWH is promising candidate for new-generation optoelectronic devices with fast response properties. The subsequent...
Two-dimensional (2D) GeSe is an important IVA-VIA semiconductor for future applications in electronics and optoelectronics because of its high absorption coefficient, mobility, photoresponsivity. However, the controllable synthesis 2D flakes still a huge problem. Here, high-quality single-crystalline ultrathin are synthesized by salt-assisted chemical vapor deposition method. The tend to grow along [010] crystal orientation presenting rectangular shape with thickness down 5 nm. Then,...
The physical origin of the strong emission line at 3.45 eV and broadening yellow luminescence (YL) band centered 2.2 in GaN nanowire (NW) has been debated for many years. Here, we solve these two notable issues by using state-of-the-art first-principles calculations based on many-body perturbation theory combined with polarization-resolved experiments. We demonstrate that ubiquitous surface "microwires" amazing characteristics, i.e., outgrowth nanocrystal along NW side wall, are vital offer...
To solve a challenging issue, i.e., the gap opening of graphene, we designed several heterojunctions graphene and other two-dimensional carbonitride materials with natural holes in their monolayers, namely, nitrogenated holey (NHG), g-C3N4, g-CN, to destroy graphene's sublattice symmetry investigated electronic structures by first-principles calculations, which external electric field effect was also considered. We found that heterojunctions, except for have direct band important edge states...
Objectives: To develop and validate the model for distinguishing brain abscess from cystic glioma by combining deep transfer learning (DTL) features hand-crafted radiomics (HCR) in conventional T1-weighted imaging (T1WI) T2-weighted (T2WI). Methods: This single-center retrospective analysis involved 188 patients with pathologically proven (102) or (86). One thousand DTL 105 HCR were extracted T1WI T2WI of patients. Three feature selection methods four classifiers, such as k-nearest neighbors...
Electrides are a special family of materials with exotic physical properties and various crystal structures in different dimensions. Among them, alkaline-earth metal nitrides (${\mathrm{AE}}_{2}\mathrm{N}$) have attracted enormous attention, since the synthesis ${\mathrm{Ca}}_{2}\mathrm{N}$ as two-dimensional (2D) electride. However, apart from ${\mathrm{Ca}}_{2}\mathrm{N}$, physicochemical other ${\mathrm{AE}}_{2}\mathrm{N}$ not well understood, some cases, their remain unknown. To overcome...
Intrinsic transparent conductors (ITCs) correspond to a unique class of TCs that do not need intentional doping. This character can provide ITCs significant advantages by avoiding severe "doping bottlenecks" and dopant scattering usually encountered in conventional conducting oxides (TCOs). However, the realization generally requires minimization photon absorption reflection metallic conductors, which is difficult due gapless nature their band structures. Here, based on first-principles...
Based on the density functional theory (DFT) calculations, a new mechanism about oxygen vacancies(Vo) in HfO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> -based ferroelectric devices is presented. In this mechanism, Vo m-phase not only serve as electron traps but also emerge ferroelectricity besides known o-phase . And increased remanent polarization during "wake-up" process mainly attributed to part of Vo-m-phase cells. Kinetic Monte...
The physical origin of the observed anomalous photoluminescence (PL) behavior, that is, large-size graphene quantum dots (GQDs) exhibiting higher PL energy than small ones and broadening spectra from deep ultraviolet to near-infrared, has been debated for many years. Obviously, it is in conflict with well-accepted confinement. Here we shed new light on these two notable debates by state-of-the-art first-principles calculations based many-body perturbation theory. We find confinement...
Abstract Ultrathin III‐nitrides beyond BN, such as GaN and AlN, have attracted much research interest due to their potential applications in 2D optoelectronic devices. Taking advantage of the atomic thickness, bandgap is expected be widened these thin films quantum confinement. As a promising intrinsic dielectric tunneling layer for devices, ultrathin freestanding AlN structures not been systematically studied, band structure still remains theoretical description. In this work, atomically...