2018年3月30日 · By monitoring the emission wavelength of 467 nm, the measured PLE spectrum consists of two excitation bands at 250 and 330 nm due to the 1 A 1 → 1 T 1 and 1 A 1 → 1 T 2 electronic transitions of VO 4 3− groups, respectively. Under the excitations of 250 and 330 nm, the NGVO sample revealed broadband blueish-green emission from the ...

2016年12月15日 · In this work, we tried to develop a method to improve the self-activated luminescence in NaMg 4 (VO 4) 3, i.e., the cationic substitutions of Cs/Ca for Na/Mg. This is based on the well-known fact that the self-activated luminescence of vanadates is dominantly controlled by the crystallographic surrounding of VO 43− groups [5], [6].

The Sr2CaLa(VO4)3:Eu³⁺ phosphor (denoted as SCLVO:Eu³⁺) exhibited the strongest photoluminescence (PL) intensity at 618 nm among the samples under excitation of 394-nm near-UV (NUV) light.

2020年4月1日 · The spectroscopic properties, including the photoluminescence (PL) and photoluminescence excitation (PLE) spectra and luminescence decay curve, could be obtained with the help of an Edinburgh Instruments FS5 spectrofluorometer with 150 W xenon lamps.

2022年3月1日 · The optical properties were investigated by UV-visible absorption, PL, and PLE spectroscopies. The absorption measurements show the formation of the vanadate host by the presence of its characteristic band in the visible region related to VO 4 3− groups.

The photoluminescence (PL) and PL excitation (PLE) spectra are investigated together with color coordinates. The luminescence process is discussed on the charge-transfer transitions in [VO4]3− ions and the crystal structure.

2015年9月15日 · In this work, a new vanadate phosphor K 3 Y (VO 4) 2:Eu 3+ with monoclinic structure was synthesized by conventional solid-state reaction. The luminescence properties of this phosphor were studied by photoluminescence excitation (PLE) spectrum, photoluminescence emission (PL) spectrum, concentration quenching, and color coordinates.

The photoluminescence (PL) and PL excitation (PLE) spectra, PL decay curves, and absolute quantum efficiency (QE) were investigated. Unlike the conventional Eu 3+ -doped vanadates, these Eu 3+ -doped samples showed not only several sharp emission lines due to Eu 3+ but also a broad emission band with a maximum at 530 nm due to the [VO 4 ] 3 ...

Eu(3+)-activated novel alkaline earth metal (Sr and Ca) vanadate phosphors, Na(Sr(0.97-x), Ca(x))VO4:Eu0.03(3+) (x = 0 to 0.97) has been successfully synthesized using solid state reaction method and characterized by XRD, XPS, FE-SEM, luminescence (PLE, PL and CIE coordinate) and decay rate measurem …

Download scientific diagram | PLE spectra for 612 nm Eu³⁺ emission in Eu³⁺-doped CsK2Gd(VO4)2 and Y2O2S crystals at room temperature. from publication: Cooperative Energy Transfer between ...