A5100323289- Luminescence Properties of Advanced Materials
- Advanced Photocatalysis Techniques
- Aeolian processes and effects
- Chalcogenide Semiconductor Thin Films
- Geology and Paleoclimatology Research
- Quantum Dots Synthesis And Properties
- Perovskite Materials and Applications
- Photonic and Optical Devices
- Ammonia Synthesis and Nitrogen Reduction
- Climate variability and models
- Pineapple and bromelain studies
- Luminescence and Fluorescent Materials
- Soil erosion and sediment transport
- Nanocluster Synthesis and Applications
- Meteorological Phenomena and Simulations
- Geological formations and processes
- bioluminescence and chemiluminescence research
- Glass properties and applications
- Market Dynamics and Volatility
- Optical Systems and Laser Technology
- Adaptive optics and wavefront sensing
- Complex Systems and Time Series Analysis
- Nuclear materials and radiation effects
- Advanced Chemical Sensor Technologies
- Radiation Detection and Scintillator Technologies
Shaanxi Normal University
2014-2023
Xi'an Institute of Optics and Precision Mechanics
2023
Tianjin University of Technology
2022
Siberian Federal University
2022
Xi'an Jiaotong University
2016
Qingdao University of Science and Technology
2012
Shanghai University
2010-2011
A detailed nondestructive analytical method for quantitative food analysis was established by using a self-fabricated NIR-LED light source combined with Mg3Ga2GeO8 (MGGO) phosphor and blue LED chip in one package, which can be integrated into smartphones. The of MGGO:Cr3+ exhibits ultra-broadband NIR emission the range 650–1200 nm, matches well overtones molecular vibrations (e.g., O–H, C–H, N–H) presented composition. crystal structure MGGO investigated powder XRD Rietveld refinements,...
Achieving tunable color and white light emission in a single phase phosphor is challenging issue. Here, series of Ce3+-Eu2+ co-doped Ca2Si5N8 phosphors were successfully synthesized by high temperature solid state method. Luminescence properties, energy transfer (ET) thermal quenching the as-synthesized samples investigated detail. The as-prepared Ca1.94Na0.03Si5N8:0.03Ce3+,yEu2+ (0.0000 ≤ y 0.0035) could be tuned from blue to eventually orange via ET changing Ce3+/Eu2+ ratio. efficiency...
Nitridomagnesosilicate phosphors are promising candidates for white light emitting diodes. Here, we report a yellow nitride phosphor Ca8Mg7Si9N22:Ce3+, which exhibits broad band emission in the spectral range of 475–675 nm under excitation 445 nm. The photoluminescence intensity Ca8–xMg7Si9N22:xCe3+ (0.01 ≤ x 0.11) reaches maximum when = 0.05. CIE coordinates and color purity Ca7.95Mg7Si9N22:0.05Ce3+ (0.449, 0.531) 84.0%, respectively. good drifting resistance with chromaticity shift 0.0085...
We report a novel narrow-band blue emitting phosphor Sr7.92Mg7Si9N22:0.08Eu2+. The crystal structure of Sr8Mg7Si9N22 is composed corner-sharing and edge-sharing [SiN4] tetrahedra distorted square-pyramid [MgN5] polyhedra. Under 350 nm excitation, Eu2+ doped emits light with maximum intensity at 450 fwhm 38 nm.
Abstract Nebkhas (coppice dunes) have formed throughout the gobi desert regions of China in response to decreased near‐surface wind speed caused by vegetation, combined with deposition aeolian sediment and around vegetation. Although nebkhas been extensively studied on several land surfaces, they not yet fully described where form areas desert. Based field investigations nebkha morphology adjacent surface content inside these dunes, following were found: (i) that develop deserts consist two...
Abstract Climate models project a weakening and expansion of the Hadley circulation (HC) under global warming but with considerable spread in magnitude these changes. Here, utilizing from latest Coupled Model Intercomparison Project Phase 6 (CMIP6), we illustrate how variance projected changes HC arises equilibrium climate sensitivity (ECS) uncertainty across models. Models higher ECS greater extent static stability increase hence larger Using best estimate value 3 K (∼2.5–4.0 K) to...
Abstract A low‐temperature topochemical reduction strategy is used herein to prepare unconventional phosphors with luminescence covering the biological and/or telecommunications optical windows. This approach demonstrated by using Bi III ‐doped Y 2 O 3 (Y 2− x ) as a model system. Experimental results suggest that treatment of CaH creates randomly distributed oxygen vacancies in matrix, resulting change oxidation states lower states. The coordination environments from [BiO 6 ] octahedra...
A novel PbS quantum dots (QDs) fiber amplifier based on SiO<sub>2</sub> Sol-Gel method was proposed. The QDs doped films deposited onto a fused tapered coupler standard single mode (SMF). With 980 nm wavelength laser diode (LD) as the pump, 1550 signal and pump light waves were injected into region simultaneously, through evanescent wave, we obtained gain at 1576 high 5 dB. proposed amplififier can implement property of small, integrated, output, low noise, gain, cost, which meet need future...
The structure of the initial system is calculated according to aberration theory, in which radius primary mirror 300 mm, secondary 320 distance between and 90 blocking ratio close 0.4, occlusion 0.4. A three-piece correction lens set designed solve spherical comet caused by Cassegrain large field view, imaging edge view realized. Through optimization layout overall system, MTF value finally greater than 0.4 within frequency 130 lp/mm. This paper provides important reference for design...
A novel PbS quantum dots (QDs) fiber amplifier based on SiO2 Sol-Gel method was proposed. The QDs doped films deposited onto a fused tapered coupler standard single mode (SMF). With 980 nm wavelength laser diode (LD) as the pump, 1550 signal and pump light waves were injected into region simultaneously, through evanescent wave, we obtained gain at 1576 high 5 dB. proposed amplififier can implement property of small, integrated, output, low noise, gain, cost, which meet need future optical...
A PbSe quantum dots (QDs) fiber amplifier has been demonstrated. The QDs were synthesized via sol-gel self-assembly method. size of was controlled to 5.5 nm through control the reaction time as well growth temperature. Transmission electron microscopy (TEM) and photoluminescence (PL) spectroscopy used characterize samples. fabricated by coating onto a tapered optical coupler. Through evanescent wave, excited realize amplification. 1550 semiconductor light emitting diode (SLED) signal source...
A PbSe quantum dots (QDs) fiber amplifier has been demonstrated. The QDs were synthesized via sol-gel self-assembly method. size of was controlled to 5.5 nm through control the reaction time as well growth temperature. Transmission electron microscopy (TEM) and photoluminescence (PL) spectroscopy used characterize samples. fabricated by coating onto a tapered optical coupler. Through evanescent wave, excited realize amplification. 1550 semiconductor light emitting diode (SLED) signal source...