A5091488849- Luminescence Properties of Advanced Materials
- Perovskite Materials and Applications
- Solid State Laser Technologies
- Radiation Detection and Scintillator Technologies
- Glass properties and applications
- Microwave Dielectric Ceramics Synthesis
- Lanthanide and Transition Metal Complexes
- Photorefractive and Nonlinear Optics
- Luminescence and Fluorescent Materials
- Solid-state spectroscopy and crystallography
- Gas Sensing Nanomaterials and Sensors
- Spectroscopy Techniques in Biomedical and Chemical Research
- Inorganic Fluorides and Related Compounds
- Atomic and Subatomic Physics Research
Dalian Maritime University
2015-2024
Er 3+ /Yb are distributed in a double-layer structure, blocked by single layer of Sc /La . Red UCL intensity (Gd 0.8 0.1 Yb )(La 0.9 )O 3 is comparable to β-NaYF 4 :Er
BiTa7O19:Er3+/Yb3+/Sb phosphors were successfully synthesized by high temperature solid sintering. X-ray diffraction (XRD), fluorescence spectrometry and photoelectron spectroscopy (XPS), used to analyze the phase structure, upconversion luminescence (UCL) features Sb valence state, respectively. The results suggest that polyvalent with Sb3+ Sb5+ can replace Ta5+ sites in a BiTa7O19 host form pure phase. Compared BiTa7O19:0.1Er3+/0.4Yb3+, doping further improves UCL intensity 1.2 times under...
A series of Eu3+ doped Sr2GdTaO6 (SGT) phosphors with double perovskite structure were synthesized via a high-temperature solid-state reaction approach. The crystal structure, morphology and luminescence properties characterized by means X-ray diffraction, transmission electron microscope, spectroscopy fluorescence decay lifetimes, respectively. Under the excitation 394 nm, intense red emission in visible region was observed SGT phosphors, critical quenching concentration derived to be 15...
Comparison image of the microstructure and UCL intensity STO:0.02Er 3+ /0.04Yb UCLPs under all preparation methods.
Abstract Based on the previous optimal concentration of Er 3+ /Yb /Mo 4+ co‐doped BiTa 7 O 19 (BTO) samples, Sc or Sb is planned to be doped into BTO:Er for further improving upconversion luminescence (UCL) intensity under 980‐nm laser excitation. A series /Sc and /Sb samples are prepared by high‐temperature solid‐phase sintering method. The microstructure UCL properties investigated X‐ray diffraction, Raman, photoelectron spectroscopy (XPS), diffuse reflection, spectrum. green little better...
Tb <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3+</sup> /Yb codoped α-NaYF <sub xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> single crystals with various Yb concentrations and ~0.40 mol% are grown by Bridgman method using KF (Potassium fluoride) as flux a temperature gradient of 70 °C/cm-90 °C/cm across the solid-liquid interface. The effect mechanisms in growing process studied. crystal structure is characterized means XRD. high...
Cs 3 BiSr(P 2 O 7 ) :Er 3+ /Yb phosphors show excellent upconversion luminescence thermal enhancement performance under 980 nm (a) and 1550 (b) laser excitation, respectively.
LiYF₄ single crystals co-doped with various Tm³⁺/Yb³⁺ concentrations were grown using the Bridg- man method. The luminescent properties of investigated through emission spectra, cross section, and decay curves under excitation by 980 nm. Compared Tm³⁺ single-doped crystal, an enhanced band from 1600 to 2150 nm was observed upon a laser diode. energy transfer Yb³⁺ optimum fluo- rescence around 1.80 µm ion investigated. maximum section at 1.8 calculated be 1.48 x 10⁻²⁰ cm² according measured...
In order to facilitate the selection of relevant matrix materials in study optical and temperature sensing properties, effect M5+ ions on properties characteristics YMO4: Er3+ (M=Nb, Ta, V, P) samples were discussed compared detail. YMO4 with varied concentrations synthesized via a traditional solid-state reaction, crystal structure phase purity confirmed by means X-ray diffraction. Though analysis Raman spectra, it was found that YNbO4 has lowest phonon energy (806 cm-1). Upon 980 nm...
Abstract Optimization of the host lattice is a novel strategy to achieve efficient up‐conversion luminescence (UCL) with multi‐peak full‐spectrum emission. Herein, optimization performed in non‐vacuum sulfur‐rich environment, where ultra‐low phonon energy NaYS 2 heterogeneous phase forced intergrow, which overcomes limitations conventional vacuum preparation method and achieves high‐efficient UCL. Remarkably, sites are preferentially occupied by S 2− , causes distortion generates layered /Y...