The luminescence properties of yttria based phosphors and study of YBO3 formation via H3BO3 addition

In this paper, Y2O3:Eu3+ nano-phosphor was synthesized through the facile solid-state method and influence of H3BO3 addition to the prepared Y2O3:Eu3+ powder was investigated. The consumption of boric acid resulted in the formation of YBO3 by changing the crystal structure from cubic to hexagonal. Noteworthy, through the use of specific quantities of H3BO3 (medium amount), Y3BO6 impurity with the monoclinic crystal structure and the space group C2/m was formed. FESEM observations showed that the addition of H3BO3 leads to the coarsening of the synthesized particles; changing from approximately 80 nm to 1 ?m. Also, it was concluded that the transformation of the crystal structure causes a dramatic change of phosphor emission colours from reddish to orange.

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Crystal structure, luminescence properties, energy transfer, tunable occupation and thermal properties of a novel color-tunable phosphor NaBa1−zSrzB9O15:xCe3+,yMn2+

Dalton Transactions ◽

10.1039/c8dt02780c ◽

2018 ◽

Vol 47 (39) ◽

pp. 13913-13925 ◽

Cited By ~ 16

Author(s):

Qi Bao ◽

Zhijun Wang ◽

Jiang Sun ◽

Zhipeng Wang ◽

Xiangyu Meng ◽

...

Keyword(s):

Crystal Structure ◽

Energy Transfer ◽

Thermal Properties ◽

High Temperature ◽

Solid State ◽

Luminescence Properties ◽

Solid State Method ◽

Color Tunable ◽

State Method

A series of color-tunable NaBa1−zSrzB9O15:Ce3+,Mn2+ phosphors were synthesized by a high temperature solid state method.

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Photoluminescence Properties of Ca3Si2O7: Pr3+ Orange-Red Phosphors Prepared by High-Temperature Solid-State Method

Zeitschrift für Naturforschung A ◽

10.1515/zna-2018-0050 ◽

2018 ◽

Vol 73 (6) ◽

pp. 555-558 ◽

Cited By ~ 3

Author(s):

Zhi-Qing Peng ◽

Rong Chen ◽

Wen-Lin Feng

Keyword(s):

Crystal Structure ◽

High Temperature ◽

Solid State ◽

Solid State Method ◽

Light Emitting ◽

Light Emitting Devices ◽

Red Phosphors ◽

Typical Sample ◽

State Method ◽

Xrd Patterns

AbstractNovel luminescent materials Ca3-xSi2O7: xPr3+ were successfully prepared by the high-temperature solid-state method. The crystal structure, morphology, and optical spectrum were characterised by X-ray diffraction (XRD), scanning electron microscopy (SEM), and spectroscopy, respectively. The XRD patterns of the samples indicate that the crystal structure is monoclinic symmetry. The SEM shows that the selected sample has good crystallinity although its appearance is irregular and scalelike. The peak of the excitation spectrum of the sample is located at around 449 nm, corresponding to 3H4→3P2 transition of Pr3+. The peak of the emission spectrum of the sample is situated at around 612 nm which is attributed to 3P0→3H6 transition of Pr3+, and the colour is orange-red. The optimum concentration for Pr3+ replaced Ca2+ sites in Ca3Si2O7: Pr3+ is 0.75 mol%. The lifetime (8.48 μs) of a typical sample (Ca2.9925Pr0.0075)Si2O7 is obtained. It reveals that orange-red phosphors Ca3-xSi2O7: xPr3+ possess remarkable optical properties and can be used in white light emitting devices.

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Structural, optical, electric and dielectric characterization of a NaCu0.2Fe0.3Mn0.5O2 compound

RSC Advances ◽

10.1039/d1ra08263a ◽

2022 ◽

Vol 12 (3) ◽

pp. 1563-1570

Author(s):

Ichrak Ben Slima ◽

Karim Karoui ◽

Abdelfattah Mahmoud ◽

Frédéric Boschini ◽

Abdallah Ben Rhaiem

Keyword(s):

Solid State ◽

Solid State Method ◽

Hexagonal System ◽

Space Group ◽

Dielectric Characterization ◽

Type Phase ◽

State Method

The compound NaCu0.2Fe0.3Mn0.5O2 was synthesized using a solid-state method and it crystallized in a hexagonal system with a R3̄m space group in an O3-type phase.

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Investigation of luminescence properties of Dy3+ doped YAlO3 phosphors synthesized through solid state method

Optik ◽

10.1016/j.ijleo.2015.12.159 ◽

2016 ◽

Vol 127 (20) ◽

pp. 9178-9195 ◽

Cited By ~ 4

Author(s):

Huma Nazli Baig ◽

Jagjeet Kaur Saluja ◽

D. Haranath

Keyword(s):

Solid State ◽

Luminescence Properties ◽

Solid State Method ◽

State Method

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Luminescence properties of Ho3+ co-doped SrAl2O4:Eu2+, Dy3+ long-persistent phosphors synthesized with a solid-state method

Journal of Molecular Structure ◽

10.1016/j.molstruc.2012.11.008 ◽

2013 ◽

Vol 1044 ◽

pp. 87-93 ◽

Cited By ~ 9

Author(s):

Z. Győri ◽

V. Havasi ◽

D. Madarász ◽

D. Tátrai ◽

T. Brigancz ◽

...

Keyword(s):

Solid State ◽

Luminescence Properties ◽

Solid State Method ◽

State Method ◽

Co Doped

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Synthesis, Crystal Structure, and Electrical Properties of a New Molybdylarsenate LiNa5K3Mo11As3O45

Journal of Crystallography ◽

10.1155/2014/181695 ◽

2014 ◽

Vol 2014 ◽

pp. 1-9

Author(s):

Hamadi Hamza ◽

Mohamed Faouzi Zid ◽

Ahmed Driss

Keyword(s):

Crystal Structure ◽

Electrical Conductivity ◽

Solid State ◽

Inorganic Compound ◽

X Ray Diffraction ◽

Solid State Method ◽

One Dimensional ◽

X Ray ◽

Triclinic System ◽

State Method

LiNa5K3Mo11As3O45 is a new inorganic compound. It was synthesized by a solid state method. The crystal structure has been studied by single crystal X-ray analysis. The R-values reached 2.8%. The title compound crystallizes in the triclinic system, space group P-1, with a = 10.550 (2) Å, b = 11.723 (2) Å, c = 17.469 (3) Å, α = 102.35 (3)°, β = 87.61 (2)°, and γ = 111.03 (3)°. The anionic unit [Mo11As3O45]9− is formed by nine MoO6 octahedra, two MoO5 trigonal bipyramids, and three AsO4 tetrahedra. The association of [Mo11As3O45]9− units, running along [010], leads to a one-dimensional framework. Li, K, and Na are located in the space surrounding the anionic ribbons. This material was characterized by SEM microscopy, IR spectroscopy, and powder X-ray diffraction. The electrical conductivity was investigated from 528 K to 673 K by impedance complex followed by DSC spectroscopy.

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Electron density, disorder and polymorphism: high-resolution diffraction studies of the highly polymorphic neuralgic drug carbamazepine

Acta Crystallographica Section B Structural Science Crystal Engineering and Materials ◽

10.1107/s2052520615019538 ◽

2016 ◽

Vol 72 (1) ◽

pp. 39-50 ◽

Cited By ~ 11

Author(s):

Ioana Sovago ◽

Matthias J. Gutmann ◽

Hans Martin Senn ◽

Lynne H. Thomas ◽

Chick C. Wilson ◽

...

Keyword(s):

Crystal Structure ◽

High Resolution ◽

Diffraction Data ◽

Structural Formula ◽

Orthorhombic Crystal ◽

Monoclinic Crystal ◽

Orthorhombic Crystal Structure ◽

Space Group ◽

X Ray ◽

Monoclinic Crystal Structure

Analysis of neutron and high-resolution X-ray diffraction data on form (III) of carbamazepine at 100 K using the atoms in molecules (AIM) topological approach afforded excellent agreement between the experimental results and theoretical densities from the optimized gas-phase structure and from multipole modelling of static theoretical structure factors. The charge density analysis provides experimental confirmation of the partially localized π-bonding suggested by the conventional structural formula, but the evidence for any significant C—N π bonding is not strong. Hirshfeld atom refinement (HAR) gives H atom positional and anisotropic displacement parameters that agree very well with the neutron parameters. X-ray and neutron diffraction data on the dihydrate of carbemazepine strongly indicate a disordered orthorhombic crystal structure in the space groupCmca, rather than a monoclinic crystal structure in space groupP21/c. This disorder in the dihydrate structure has implications for both experimental and theoretical studies of polymorphism.

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Design and synthesis of Ba3SiSe5 with suitable birefringence modulated via MIV atoms in Ba-MIV-Q (MIV = Si, Ge; Q = S, Se) system

Dalton Transactions ◽

10.1039/d1dt01747k ◽

2021 ◽

Author(s):

Huanhuan Cheng ◽

Abudukadi Tudi ◽

Peng Wang ◽

Kewang Zhang ◽

Zhihua Yang ◽

...

Keyword(s):

High Temperature ◽

Solid State ◽

Solid State Method ◽

Orthorhombic System ◽

Space Group ◽

Design And Synthesis ◽

Centrosymmetric Space Group ◽

System P ◽

State Method

A new ternary Ba-based selenide, Ba3SiSe5, was synthesized by high-temperature solid-state method. It crystalizes in the centrosymmetric space group Pnma (No. 62) of the orthorhombic system. The structure of the...

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Long-lasting luminescence in ZnGa2O4: Cr3+ through persistent energy transfer

Modern Physics Letters B ◽

10.1142/s0217984916500196 ◽

2016 ◽

Vol 30 (04) ◽

pp. 1650019 ◽

Cited By ~ 4

Author(s):

Lei Li ◽

Yinhai Wang ◽

Haiju Huang ◽

Hong Li ◽

Hui Zhao

Keyword(s):

Energy Transfer ◽

High Temperature ◽

Solid State ◽

Near Infrared ◽

Blue Emission ◽

Fluorescence Decay ◽

Luminescence Properties ◽

Solid State Method ◽

Zinc Gallate ◽

State Method

Cr[Formula: see text]-doped zinc gallate (ZnGa2O4) near-infrared (NIR) phosphors were synthesized via a high temperature solid state method. The luminescence properties of the phosphors were studied systematically. A significant spectra overlap between the emission of ZnGa2O4 and the absorption of Cr[Formula: see text] was observed and 300 nm excitation exhibited the most excellent long-lasting luminescence properties among the three main excitation bands. Luminescence intensity was changed with the ratio of Ga[Formula: see text]/Cr[Formula: see text] and the blue host emission of ZnGa2O4 was suppressed when doping Cr[Formula: see text] into ZnGa2O4. The fluorescence decay curves of blue emission of ZnGa2O4 with different Cr[Formula: see text] doping concentrations indicated that the lifetime of ZnGa2O4 at 505 nm become shorter with the increase of the Cr[Formula: see text] concentration. Herein, a possible mechanism of long-lasting luminescence in ZnGa2O4: Cr[Formula: see text] was proposed that the NIR long-lasting luminescence in ZnGa2O4: Cr[Formula: see text] comes from the persistent energy transfer from ZnGa2O4 to Cr[Formula: see text].

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