scholarly journals Structural, vibrational study and UV photoluminescence properties of the system Bi(2−x)Lu(x)WO6 (0.1 ≤ x ≤ 1)

RSC Advances ◽  
2015 ◽  
Vol 5 (116) ◽  
pp. 96242-96252 ◽  
Author(s):  
H. Ait ahsaine ◽  
M. Ezahri ◽  
A. Benlhachemi ◽  
B. Bakiz ◽  
S. Villain ◽  
...  
Keyword(s):  
Solid Solutions ◽  
Photoluminescence Properties ◽  
Vibrational Study ◽  
Time Correlations ◽  
First Time ◽  
Uv Excitation

This study on bismuth lutetium tungstates presents, for the first time, correlations between structure, vibrational and photoluminescence properties in the case of solid solutions Bi2−xLuxWO6. The origin of luminescence signals under UV excitation is discussed.

Study of the photoluminescence properties of Eu2+-doped Ca(AlxGa1−x)2S4 solid solutions at high excitation intensity and low temperature

2018 ◽  
Vol 32 (25) ◽  
pp. 1850306
Author(s):  
E. G. Asadov ◽  
O. B. Tagiev ◽  
K. O. Tagiev ◽  
G. S. Hadjieva ◽  
M. S. Leanenia ◽  
...  
Keyword(s):  
Power Density ◽  
Solid Solutions ◽  
Room Temperature ◽  
Emission Spectra ◽  
Excitation Power ◽  
Excitation Intensity ◽  
Excitation Power Density ◽  
Photoluminescence Properties ◽  
First Time ◽  
Extreme Stability

The investigation of photoluminescence (PL) properties of Ca(Al[Formula: see text]Ga[Formula: see text]S4:Eu[Formula: see text] solid solutions with [Formula: see text] = 0, 0.1, 0.2 and 0.3 synthesized for the first time was performed in wide temperature and excitation power density ranges. It is shown that PL intensity decreases by only 20–30% for different [Formula: see text] in the temperature range from 10 K to 300 K. The extreme stability of shape and position of the emission spectra was found in the range of excitation power density from [Formula: see text] W/cm2 to [Formula: see text] W/cm2 by nanosecond pulsed radiation. The reversible PL efficiency droop was only above 104 W/cm2 of excitation power density. The PL decay time constant was found to be of about 560 ns to 595 ns for [Formula: see text] ranging between 0.1 and 0.3 at room temperature.

A new disordered langbeinite-type compound, K2Tb1.5Ta0.5P3O12, and Eu3+-doped multicolour light-emitting properties

2019 ◽  
Vol 75 (2) ◽  
pp. 213-220 ◽  
Author(s):  
Ya-Li Xue ◽  
Dan Zhao ◽  
Shi-Rui Zhang ◽  
Ya-Nan Li ◽  
Yan-Ping Fan
Keyword(s):  
Three Dimensional ◽  
Spectroscopic Properties ◽  
Energy Transfer Mechanism ◽  
Photoluminescence Properties ◽  
X Ray Diffraction ◽  
Light Emitting ◽  
X Ray ◽  
First Time ◽  
Uv Excitation ◽  
The Eu

For the first time, a new langbeinite-type phosphate, namely potassium terbium tantalum tris(phosphate), K2Tb1.5Ta0.5(PO4)3, has been prepared successfully using a high-temperature flux method and has been structurally characterized by single-crystal X-ray diffraction. The results show that its structure can be described as a three-dimensional open framework of [Tb1.5Ta0.5(PO4)3]∞ interconnected by K+ ions. The TbIII and TaV cations in the structure are disordered and occupy the same crystallographic sites. The IR spectrum, the UV–Vis spectrum, the morphology and the Eu3+-activated photoluminescence spectroscopic properties were studied. A series of Eu3+-doped phosphors, i.e. K2Tb1.5–x Ta0.5(PO4)3:xEu3+ (x = 0.01, 0.03, 0.05, 0.07, 0.10), were prepared via a solid-state reaction and the photoluminescence properties were studied. The results show that under near-UV excitation, the luminescence colour can be tuned from green through yellow to red by simply adjusting the Eu3+ concentration from 0 to 0.1, because of the efficient Tb3+→Eu3+ energy-transfer mechanism.

Synthesis, crystal structure and photoluminescence properties of Eu2+-activated RbCaGd(PO4)2 phosphors

RSC Advances ◽  
2016 ◽  
Vol 6 (14) ◽  
pp. 11211-11217 ◽  
Author(s):  
Xue Chen ◽  
Qidi Wang ◽  
Fengzhu Lv ◽  
Paul K. Chu ◽  
Yihe Zhang
Keyword(s):  
Crystal Structure ◽  
Sol Gel ◽  
Dipole Interaction ◽  
Concentration Quenching ◽  
Photoluminescence Properties ◽  
Gel Method ◽  
Sol Gel Method ◽  
First Time

RbCaGd(PO4)2:Eu2+ was prepared by the Pechini-type sol–gel method. The crystal structure was determined in the first time. The dipole–dipole interaction plays a major role in the mechanism of concentration quenching of Eu2+ in this phosphor.

Scheelite (CaWO4)-type microphosphors: Facile synthesis, structural characterization and photoluminescence properties

2016 ◽  
Vol 30 (32n33) ◽  
pp. 1650400 ◽  
Author(s):  
Yuanyuan Han ◽  
Dan Wang ◽  
Danyang Liang ◽  
Shiqi Wang ◽  
Guoxin Lu ◽  
...  
Keyword(s):  
Luminescence Decay ◽  
Precipitation Method ◽  
Ammonium Bromide ◽  
Photoluminescence Properties ◽  
Facile Synthesis ◽  
Cetyltrimethyl Ammonium Bromide ◽  
Broad Emission ◽  
Transition Formula ◽  
Cetyltrimethyl Ammonium ◽  
Uv Excitation

Scheelite (CaWO4)-type microphosphors were synthesized by the precipitation method assisted with cetyltrimethyl ammonium bromide (CTAB). All compounds crystallized in the tetragonal structure with space group [Formula: see text] (No. 88). FE-SEM micrographs illustrate the spherical-like morphologies and rough surface. PL spectra indicate the broad emission peak maximum at 613 nm under UV excitation. Luminescence decay curves monitored by [Formula: see text] transition ([Formula: see text] nm) of Eu[Formula: see text] in doped CaWO4 are presented, the curves exhibit a single-exponential feature and the lifetime for doped CaWO4 is 0.61 ms.

Structure and crystallization of SiO2and B2O3doped lithium disilicate glasses from theory and experiment

2017 ◽  
Vol 19 (37) ◽  
pp. 25298-25308
Author(s):  
Andreas Erlebach ◽  
Katrin Thieme ◽  
Marek Sierka ◽  
Christian Rüssel
Keyword(s):  
Solid Solutions ◽  
Lithium Disilicate ◽  
First Time ◽  
Theory And Experiment

Solid solutions of SiO2and B2O3in Li2O·2SiO2are synthesized and characterized for the first time by calculations and experiments.

scholarly journals The effect of manganese oxidation state on antiferromagnetic order in SrMn1−xSbxO3 (0 < x < 0.5) perovskite solid solutions

2019 ◽  
Vol 7 (7) ◽  
pp. 2085-2095
Author(s):  
Gennady V. Bazuev ◽  
Alexander P. Tyutyunnik ◽  
Alexander V. Korolev ◽  
Emmanuelle Suard ◽  
Cheuk-Wai Tai ◽  
...  
Keyword(s):  
Solid Solution ◽  
Oxidation State ◽  
Solid Solutions ◽  
Mixed Valence ◽  
Antiferromagnetic Order ◽  
Manganese Oxidation ◽  
Magnetic Structures ◽  
First Time

Two ranges of mixed-valence manganese (Mn3+/Mn4+) SrMn1−xSbxO3 solid solution and corresponding magnetic structures were described for the first time.

scholarly journals Nanohybrid scaffolds with luminescent remote control

2018 ◽  
Vol 190 ◽  
pp. 04022
Author(s):  
Anastasia V. Sochilina ◽  
Alexander G. Savelyev ◽  
Natalya V. Sholina ◽  
Denis N. Karimov ◽  
Andrey V. Nechaev ◽  
...  
Keyword(s):  
Remote Control ◽  
Small Animal ◽  
Upconversion Nanoparticles ◽  
Hybrid Nanocomposite ◽  
Direct Laser Writing ◽  
Photoluminescence Properties ◽  
Direct Laser ◽  
Scaffold Structure ◽  
Nanocomposite Scaffolds ◽  
First Time

We report on hybrid nanocomposite scaffolds on the base of cross-linked hyaluronic acid derivative with embedded upconversion nanoparticles (UCNPs). The unique photoluminescence properties of specially designed hydrophilic UCNPs enable visualization of hydrogel using NIR irradiation. Formation of scaffold structure can be produced by means of 3D printing or direct laser writing. For the first time, we present visualization of nanohybrid scaffolds in live small animal aiming to demonstrate new possibilities of their luminescent remote control for tissue engineering.

scholarly journals Structure, electronic properties, morphology evolution, and photocatalytic activity in PbMoO4 and Pb1−2xCaxSrxMoO4 (x = 0.1, 0.2, 0.3, 0.4 and 0.5) solid solutions

2020 ◽  
Vol 22 (44) ◽  
pp. 25876-25891
Author(s):  
E. O. Gomes ◽  
L. Gracia ◽  
A. A. G. Santiago ◽  
R. L. Tranquilin ◽  
F. V. Motta ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Electronic Properties ◽  
Solid Solutions ◽  
Precipitation Method ◽  
Morphology Evolution ◽  
Water Based ◽  
Co Precipitation ◽  
First Time

In this work PbMoO4 and Pb1−2xCaxSrxMoO4 (x = 0.1, 0.2, 0.3, 0.4 and 0.5) solid solutions have been successfully prepared, for the first time, by a simple co-precipitation method and the as-synthesized samples were subjected to a water-based reflux treatment.

Synthesis and up-conversion photoluminescence properties of uniform monodisperse YbPO4:Ln3+ (Ln3+ = Er3+, Tm3+, Ho3+) hollow microspheres

2017 ◽  
Vol 41 (17) ◽  
pp. 8959-8964 ◽  
Author(s):  
Zhenhe Xu ◽  
Yanfeng Bi ◽  
He Yu ◽  
Junying Lin ◽  
Fu Ding ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Exchange Process ◽  
Hollow Microspheres ◽  
Homogeneous Precipitation ◽  
Photoluminescence Properties ◽  
Calcination Process ◽  
Ion Exchange Process ◽  
First Time

Uniform monodisperse YbPO4 hollow microspheres have been successfully synthesized via the combination of a facile homogeneous precipitation approach, an ion-exchange process, and a calcination process for the first time.

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