A5100742760- Silicon Nanostructures and Photoluminescence
- ZnO doping and properties
- Semiconductor materials and devices
- Semiconductor materials and interfaces
- Thin-Film Transistor Technologies
- Covalent Organic Framework Applications
- Photonic and Optical Devices
- Nanowire Synthesis and Applications
- Metal-Organic Frameworks: Synthesis and Applications
- Semiconductor Quantum Structures and Devices
- Magnetic and transport properties of perovskites and related materials
- Silicon and Solar Cell Technologies
- Advanced battery technologies research
- GaN-based semiconductor devices and materials
- Phase-change materials and chalcogenides
- Advanced Semiconductor Detectors and Materials
- Physics of Superconductivity and Magnetism
- Advanced Condensed Matter Physics
- Transition Metal Oxide Nanomaterials
- Gold and Silver Nanoparticles Synthesis and Applications
- Conducting polymers and applications
- Magnetic properties of thin films
- Integrated Circuits and Semiconductor Failure Analysis
- Ga2O3 and related materials
- Quantum and electron transport phenomena
Helmholtz-Zentrum Dresden-Rossendorf
2016-2024
Chongqing Public Health Medical Center
2024
Chongqing Medical University
2024
Sichuan Normal University
2023-2024
Fanjingshan National Nature Reserve
2023
Harbin Institute of Technology
2015-2022
TU Dresden
2017-2021
Universidad Complutense de Madrid
2021
Institut für Technische und Angewandte Physik (Germany)
2019
King Abdullah University of Science and Technology
2018
π-Conjugated two-dimensional covalent organic frameworks (2D COFs) are emerging as a novel class of electroactive materials for (opto)electronic and chemiresistive sensing applications. However, understanding the intricate interplay between chemistry, structure, conductivity in π-conjugated 2D COFs remains elusive. Here, we report detailed characterization electronic properties two samples consisting Zn- Cu-phthalocyanine-based pyrazine-linked COFs. These synthesized by condensation...
Abstract 2D conjugated metal‐organic frameworks (2D c ‐MOFs) are emerging as a novel class of conductive redox‐active materials for electrochemical energy storage. However, developing ‐MOFs flexible thin‐film electrodes have been largely limited, due to the lack capability solution‐processing and integration into nanodevices arising from rigid powder samples by solvothermal synthesis. Here, synthesis phthalocyanine‐based ‐MOF (Ni 2 [CuPc(NH) 8 ]) nanosheets through ball milling mechanical...
Abstract The realization of ferromagnetism in semiconductors is an attractive avenue for the development spintronic applications. Here, we report a semiconducting layered metal-organic framework (MOF), namely K 3 Fe 2 [( 2,3,9,10,16,17,23,24 -octahydroxy phthalocyaninato)Fe] (K [PcFe-O 8 ]) with spontaneous magnetization. This MOF features in-plane full π-d conjugation and exhibits behavior room temperature carrier mobility 15 ± cm V −1 s as determined by time-resolved Terahertz...
Two-dimensional conjugated covalent organic frameworks (2D c-COFs) are emerging as a unique class of semiconducting 2D polymers for (opto)electronics and energy storage. Doping is one the common, reliable strategies to control charge carrier transport properties, but precise mechanism underlying COF doping has remained largely unexplored. Here we demonstrate molecular iodine metal–phthalocyanine-based pyrazine-linked c-COF. The resultant c-COF ZnPc-pz-I2 maintains its structural integrity...
Ultrathin and large-sized 2D conjugated MOF single-crystalline nanosheets are synthesized, which allow fast ion diffusion high utilization of active sites, therefore exhibit remarkable performance for Li-ion batteries.
The development of layer-oriented two-dimensional conjugated metal–organic frameworks (2D c-MOFs) enables access to direct charge transport, dial-in lateral/vertical electronic devices, and the unveiling transport mechanisms but remains a significant synthetic challenge. Here we report novel synthesis metal-phthalocyanine-based p-type semiconducting 2D c-MOF films (Cu2[PcM–O8], M = Cu or Fe) with an unprecedented edge-on layer orientation at air/water interface. structure formation is guided...
The room-temperature broadband photoresponse of silicon in the infrared region is great interest for on-chip photonic platforms, but fundamentally limited to near infrared, due particular value band gap. authors combine ion implantation with pulsed laser melting a CMOS-compatible approach introducing Te dopant into Si crystal, at concentrations orders magnitude above solid solubility limit. This leads formation an intermediate upper half silicon's gap, extending Te-hyperdoped...
In-plane asymmetric micro-supercapacitors with ultrahigh energy density are rationally constructed using nano-sandwiched metal hexacyanoferrate/graphene hybrid thin films.
Increasing the free-carrier concentration in silicon is a pressing issue modern electronics. The common shallow-level donors like P and As only permit electrically active doping up to 5\ifmmode\times\else\texttimes\fi{}10${}^{20}$ cm${}^{\ensuremath{-}3}$. authors discover that, surprisingly, with deep-level Te can actually exceed this limit. Density-functional calculations unveil microscopic mechanism behind behavior: Substitutional dimers occupying adjacent Si lattice sites provide free...
Electrochemical proton storage plays an essential role in designing next-generation high-rate energy devices, e.g., aqueous batteries. Two-dimensional conjugated covalent organic frameworks (2D c-COFs) are promising electrode materials, but their competitive and metal-ion insertion mechanisms remain elusive, COFs is rarely explored. Here, we report a perinone-based poly(benzimidazobenzophenanthroline) (BBL)-ladder-type 2D c-COF for fast both mild Zn-ion electrolyte strong acid. We unveil...
Highly sensitive short-wave infrared (SWIR) detectors, compatible with the silicon-based complementary metal oxide semiconductor (CMOS) process, are regarded as key enabling components in miniaturized system for weak signal detection. To date, high photogain devices greatly limited by a large bias voltage, low-temperature refrigeration, narrow response band, and complex fabrication processes. Here, we demonstrate detectors working SWIR region at room temperature, which use graphene charge...
Abstract Si‐based photodetectors satisfy the criteria of being low‐cost and environmentally friendly, can enable development on‐chip complementary metal‐oxide‐semiconductor (CMOS)‐compatible photonic systems. However, extending their room‐temperature photoresponse into mid‐wavelength infrared (MWIR) regime remains challenging due to intrinsic bandgap Si. Here, we report on a comprehensive study MWIR photodetector based Si hyperdoped with Te. The demonstrated p‐n photodiode exhibits spectral...
In the present work, single-crystalline quasi-van der Waals ferromagnet $\mathrm{F}{\mathrm{e}}_{0.26}\mathrm{Ta}{\mathrm{S}}_{2}$ was successfully synthesized with Fe atoms intercalated at ordered positions between $\mathrm{Ta}{\mathrm{S}}_{2}$ layers. Its critical behavior systematically studied by measuring magnetization around ferromagnetic to paramagnetic phase transition temperature, ${T}_{C}\ensuremath{\sim}100.7\phantom{\rule{0.16em}{0ex}}\mathrm{K}$, under different magnetic fields....
Herein, the assembly behavior of gold nanoparticles (AuNPs) at oil/water interface is studied by surface-enhanced Raman scattering (SERS) spectroscopy. Two selected chemicals [1-dodecanethiol (DDT) and tetramethylammonium ion (TMA(+))] are applied to tune surface properties AuNPs corresponding behaviors thoroughly investigated. Various films, namely sparse 2D film, perfect monolayer, multilayers obtained. The SERS spectra analyses show that composition strongly dependent on chemical...
In the present work, we report 25 MeV oxygen irradiation effects in n-type single crystal β-Ga2O3 at different fluences. We demonstrate that symmetric stretching modes and bending vibrations of GaO4 GaO6 units are impaired upon increasing O fluence. Blue green photoluminescence (PL) emission bands found to be mainly associated with gallium–oxygen divacancies, gallium vacancies interstitials. The increase optically active centers low fluence PL quenching high ascribed reduction carrier...
Integration of high quality single crystalline InP thin film on Si substrate has potential applications in Si-based photonics and high-speed electronics. In this work, the exfoliation a 634 nm layer from bulk was achieved by sequential implantation He ions H at room temperature. It found that sequence ion implantations decisive influence surface blistering exfoliation, which only occur pre-implanted with ions. The efficiency first increases then decreases as function fluence. A kinetics...
Plasmonic sensing in the infrared region employs direct interaction of vibrational fingerprints molecules with plasmonic resonances, creating surface-enhanced platforms that are superior to traditional spectroscopy. However, standard noble metals used for resonances suffer from high radiative losses as well fabrication challenges, such tuning spectral resonance positions into mid- far-infrared regions, and compatibility issue existing complementary metal-oxide-semiconductor (CMOS)...
This paper presents a systematic study of the charge transport behavior heavily doped n-type Ge layers with As and Sb. A nonequilibrium method ion implantation followed by milliseconds flash lamp annealing is applied to synthesize n++ (Ge:As Ge:Sb). The resulting materials contain free electrons density above 3 × 1019 cm−3 mobility more than 220 cm2/(V s). Quantum corrections conductance in magnetic field are observed at low temperatures. Weak localization persists up 30 K Ge:Sb, while only...
Abstract Tellurium‐hyperdoped silicon (Si:Te) shows significant promise as an intermediate band material candidate for highly efficient solar cells and photodetectors. Time‐resolved THz spectroscopy (TRTS) is used to study the excited carrier dynamics of Si hyperdoped with 0.5, 1, 2%. The two photoexcitation wavelengths enable us understand temperature‐dependent transport in region comparison region. Temperature significantly influences magnitude transient conductivity decay time when...
Ion irradiation has emerged as a powerful tool for the efficient control of uniaxial lattice expansion to fine tune and modulate otherwise inaccessible complex correlated phases in oxide thin-films. We report tuning magnetic moment, ferromagnetic-paramagnetic metal-insulator transition temperatures NiCo2O4 inverse-spinel by creating oxygen deficiencies, employing high energy He-ion irradiation. Tailoring vacancies consequently out-of-plane direction drives system toward increase moment...
Two-dimensional conjugated metal–organic frameworks (2D c-MOFs) have emerged as a new generation of conducting MOFs for electronics. However, controlled synthesis thin-film samples with high crystallinity and defined layer orientation, which is beneficial achieving high-performance devices reliable structure–property relationship, has remained challenge. Here, we develop surfactant-directed two-step layered 2D c-MOF films based on benzene triphenylene ligands linked by copper-bis(diimino)...
Hyperdoped silicon with deep level impurities has attracted much research interest due to its promising optical and electrical properties. In this work, single crystalline supersaturated titanium is fabricated by ion implantation followed both pulsed laser melting flash lamp annealing. The decrease of sheet resistance increasing Ti concentration attributed a surface morphology effect the formation cellular breakdown at percolation conduction high responsible for metallic-like conductivity....
Mn5Ge3 thin films have been demonstrated as a promising spin-injector material for germanium-based spintronic devices. So far, has grown epitaxially only on Ge (111) substrates. In this letter we present the growth of epitaxial (100) The film is synthetized via sub-second solid-state reaction between Mn and upon flash lamp annealing 20 ms at ambient pressure. single crystalline ferromagnetic with Curie temperature 283 K. Both c-axis hexagonal magnetic easy axis are parallel to surface....
Sensor fault estimation and isolation is significant for an attitude control systems model of a satellite, as it works in complex environment. The standard unscented Kalman filter algorithm may lose its accuracy when the noise considerable. Therefore, adaptive filtering proposed based on sampled-data descriptor model. performance sensor improved by depending innovation measurement residual, convergence guaranteed. Combining with multiple-model estimation, method proposed. Finally, simulation...