A5044618789- Luminescence Properties of Advanced Materials
- Glass properties and applications
- Solid State Laser Technologies
- Quantum Dots Synthesis And Properties
- Perovskite Materials and Applications
- Chalcogenide Semiconductor Thin Films
- Lanthanide and Transition Metal Complexes
- Nanocluster Synthesis and Applications
- Radiation Detection and Scintillator Technologies
- Luminescence and Fluorescent Materials
- Inorganic Fluorides and Related Compounds
- 2D Materials and Applications
- Advanced Photocatalysis Techniques
- Microwave Dielectric Ceramics Synthesis
- Gas Sensing Nanomaterials and Sensors
- Advanced Thermoelectric Materials and Devices
- Photonic and Optical Devices
- Digital Radiography and Breast Imaging
- Nuclear materials and radiation effects
- Aerogels and thermal insulation
- Nanoplatforms for cancer theranostics
- Ga2O3 and related materials
- Advanced Semiconductor Detectors and Materials
- Solid-state spectroscopy and crystallography
- Photorefractive and Nonlinear Optics
Zhejiang University
2015-2024
Baotou Research Institute of Rare Earths
2024
State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization
2024
Luoyang Institute of Science and Technology
2024
University of Electronic Science and Technology of China
2024
China Jiliang University
2022
Hangzhou Xixi hospital
2016-2021
State Key Laboratory of Silicon Materials
2010-2018
Silicon Labs (United States)
2010-2018
Hangzhou Academy of Agricultural Sciences
2016-2018
Thermal quenching of photoluminescence represents a significant obstacle to practical applications such as lighting, display, and photovoltaics. Herein, novel strategy is established enhance upconversion luminescence at elevated temperatures based on the use negative thermal expansion host materials. Lanthanide-doped orthorhombic Yb2 W3 O12 crystals are synthesized characterized by in situ X-ray diffraction spectroscopy. The thermally induced contraction distortion lattice demonstrated...
Abstract Antimony selenide (Sb 2 Se 3 ) is a promising candidate for photodetector applications boasting unique material benefits and remarkable optoelectronic properties. Achieving high‐performance self‐powered Sb through synergistic regulation of absorber layer heterojunction interface demonstrates great potential needs essential investigation. In this study, an effective two‐step thermodynamic/kinetic deposition technique containing sputtered selenized precursor implemented to induce...
Abstract Yb/Er doped hexagonal β‐NaLnF 4 (Ln = Gd, Y, Lu) are regarded as the most efficient green upconversion (UC) materials. Unfortunately, is quite difficult to grow monocrystal owing cubic‐to‐hexagonal phase transition during cooling. As an alternative, herein a nanocrystallization controllable strategy synthesize monodisperse whole‐family (from NaLaF NaLuF ) embedded bulky glass ceramics reported. A series of structural and spectroscopic characterizations indicate that Na content Al/Si...
Controlling excitation power is the most convenient approach to dynamically tuning upconversion that essential for a variety of studies. However, this suffers from significant constraint due insensitive response systems power. Here we present study amplifying power-sensitivity in Ho3+ ions through use NaYbF4 host. Mechanistic investigation reveals sensitive stems maximal incident energy enabled by concentrated Yb3+ sensitizers. This allows us sensitively tune red-to-green emission intensity...
We describe the use of a layer-by-layer hierarchical nanostructure to exploit synergy different lanthanide ions for converting single wavelength excitation into emissions spanning whole spectral region. By lining up set with matched energy levels in core–shell nanostructure, we demonstrate well-defined cascades transfer that gives access optical from large collection (Tb3+, Eu3+, Dy3+, Sm3+, Nd3+, Yb3+, and Er3+) after common sensitizer Ce3+ featuring broad absorption. Through optimization...
Optimizing the light‐emitting efficiency of silicon quantum dots (Si QDs) has been recently intensified by demand practical use Si QDs in a variety fields such as optoelectronics, photovoltaics, and bioimaging. It is imperative that an understanding optimum should be obtained to guide design synthesis processing QDs. Here investigation presented on characteristics photoluminescence (PL) from hydrosilylated rather broad size region (≈2–10 nm), which enables effective mass approximation model...
Colloidal silicon quantum dots (Si QDs) hold ever-growing promise for the development of novel optoelectronic devices such as light-emitting diodes (LEDs). Although it has been proposed that ligands at surface colloidal Si QDs may significantly impact performance LEDs based on QDs, little systematic work carried out to compare are fabricated using with different ligands. Here, rather short octyl (Octyl-Si and phenylpropyl (PhPr-Si employed fabrication LEDs. It is found optical power density...
An effective colloidal process involving the hot‐injection method is developed to synthesize uniform nanoflowers consisting of 2D γ‐In 2 Se 3 nanosheets. By exploiting narrow direct bandgap and high absorption coefficient in visible light range In , a high‐quality /Si heterojunction photodiode fabricated. This shows photoresponse under illumination, short response/recovery times, long‐term durability. addition, self‐powered displays broadband spectral response ranging from UV IR with...
Tremendous enhancement of optical emission efficiency was achieved in fluorosilicate glasses by growing lanthanide doped fluoride nanocrystals embedded oxide glass matrix. The formation mechanism the microstructure elucidated combining solid-state NMR, scanning TEM, EDX map, and large-scale molecular dynamics simulations. results reveal that growth originated from phase separation. Atomic level structures separation fluoride-rich regions oxyfluoride matrix were observed both maps MD...
Abstract Mixed lanthanide metal–organic framework (LnMOF) films are directly grown on a quartz substrate through wet chemical synthesis. Thermometric properties of the LnMOF originating from temperature dependent emission intensity ratio Tb/Eu systematically investigated in 298–383 K range. At an optimized concentration 98.0:2.0, ratiometric thermometer registers high relative sensitivity 16.14% −1 at 359 K. As increases 298 to 383 K, film also displays distinct change color green red,...
Abstract Core–shell structured nanoparticles are increasingly used to host luminescent lanthanide ions but the structural integrity of these still lacks sufficient understanding. Herein, we present a new approach detect diffusion dopant in core–shell nanostructures using probes whose emission profile and luminescence lifetime sensitive chemical environment. We show that solution‐synthesized firmly confined designed locations. However, annealing at certain temperatures (greater than circa 350...
Abstract The effect of anisotropic interfacial strain on epitaxial growth and optical emission sodium rare‐earth fluoride core–shell nanoparticles is investigated. A variety shells are grown hexagonal‐phase NaYF 4 :Yb/Er core for providing tuning strains. Using high‐resolution transmission electron microscopy X‐ray diffraction characterizations, the correlations between habits strains quantitatively addressed. Furthermore, affinity tuned by controlling precursor concentration in conjunction...
A class of one-dimensional hollow microstructure is described, which was formed by a kinetically controlled crystal growth process. hexagonal-phase NaYbF4 microrod comprising isolated holes along the longitudinal axis synthesized one-pot hydrothermal method with assistance citrate ligands. The structural void feature modulates light intensity across microrods as result interference arising from scattering and reflection inner walls. single doped upconverting lanthanide ions. Upon...
Much can be learned from the research and development of scintillator crystals for improving scintillation performance glasses. Relying on concept "embedding crystalline order in glass", we have demonstrated that properties Ce3+-doped nanoglass composites (nano-GCs) optimized via synergistic effects Gd3+-sublattice sensitization band-gap engineering. The nano-GCs host a large volume fraction KYxGd1–xF4 mixed-type fluoride nanocrystals (NCs) still retain reasonably good transparency at...
Abstract Metal halide crystals are bright but hygroscopic scintillator materials that widely used in X‐ray imaging and detectors. Precipitating them situ glass to form ceramics (GCs) offers an efficient avenue for large‐scale preparation, high spatial resolution, excellent stability. However, precipitating a fraction of metal nanocrystals maintain light yield remains challenge. Herein, ionic‐covalent hybrid network strategy constructing GCs with crystallinity (up ≈37%) BaCl 2 : Eu 2+ is...
The upconversion luminescence and near infrared of the Er3+ ions in transparent oxyfluoride glass ceramics containing SrF2 nanocrystals have been investigated. formation was confirmed by x-ray diffraction. oscillator strengths for several transitions obtained then Judd-Ofelt parameters were determined. split emission peaks can be observed because incorporated into crystalline environment nanocrystals. intensity increased significantly with increasing crystallization time. transition...
The preparation process and upconversion luminescence of the Er(3+)-doped glass ceramics containing Ba(2)LaF(7) nanocrystals were investigated. formation in was confirmed by X-ray diffraction. exhibited highly efficient comparison with glasses. With increase heat treatment temperature intensity increased gradually. composition glasses also found to have significant influence on crystallization ceramics. mixture La(2)O(3) La(2)F(3) could be obtained controlling different compositions varied...
The Ce3+ and Dy3+ codoped oxyfluoride glasses glass ceramics containing LaF3 nanocrystals have been prepared in the reducing atmosphere. emission intensity Commission International de I'Eclairage (CIE) chromaticity coordinates of significantly changed with concentration ratio to Dy3+. both ions 3.0% increased comparison that glass. could emit bright white light by adjusting