Partially Yttria-Stabilized Zirconia Crystals Co-Doped with Neodymium, Cerium, Terbium, Erbium or Ytterbium Oxides

In this work, we studied the phase composition, local structure and mechanical characteristics of ZrO2 crystals partially stabilized with Y2O3 and co-doped with Nd2O3, CeO2, Er2O3, Tb2O3 and Yb2O3. Crystals were grown by directional melt crystallization in a cold container. The phase composition and structure of crystals were studied by X-ray diffractometry and transmission electron microscopy. The study of the features of the incorporation of rare-earth cations with different ionic radii into the transformable (t) and nontransformable (t’) tetragonal phases was carried out by the method of selective laser spectroscopy and time-resolved spectroscopy. Mechanical characteristics such as microhardness and fracture toughness were studied by the indentation method. It is shown that the phase composition and structure of crystals at the same total concentration of doping oxides depends on the degree of substitution of Y3+ cations by rare-earth cations. Rare earth ions of the beginning of the lanthanide series predominantly occupy positions in the nontransformable tetragonal phase of crystals based on zirconium dioxide. Ions of the end of a series of lanthanides do not show selectivity when entering the transformable (t) phase and nontransformable (t’) phase. The study of the mechanical characteristics of the crystals showed that the values of fracture toughness increase with an increase in the ionic radius of the rare earth element of the co-doped oxide, while the values of the microhardness of the crystals slightly decrease.

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Warm-white luminescence of Dy3+ and Sm3+ co-doped NaSrPO4 phosphors through energy transfer between rare earth ions

Journal of Materials Science Materials in Electronics ◽

10.1007/s10854-021-06219-4 ◽

2021 ◽

Author(s):

Wen Yan ◽

Junhan Li ◽

Wentao Zhang ◽

Xi Gao ◽

Peicong Zhang

Keyword(s):

Energy Transfer ◽

Rare Earth ◽

Rare Earth Ions ◽

White Luminescence ◽

Co Doped

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Tunable emissions via the white region from Sr2Gd8(SiO4)6O2:RE3+ (RE3+: Dy3+, Tm3+, Eu3+) phosphors

New Journal of Chemistry ◽

10.1039/c6nj00017g ◽

2016 ◽

Vol 40 (7) ◽

pp. 6214-6227 ◽

Cited By ~ 16

Author(s):

Gattupalli Manikya Rao ◽

G. Seeta Rama Raju ◽

Sk. Khaja Hussain ◽

E. Pavitra ◽

P. S. V. Subba Rao ◽

...

Keyword(s):

Rare Earth ◽

White Light ◽

Host Lattice ◽

Rare Earth Ions ◽

White Region ◽

Light Region ◽

Trivalent Rare Earth ◽

Co Doped

Sr2Gd8(SiO4)6O2 is an excellent host lattice for tunable emissions via the white-light region when co-doped with suitable trivalent rare-earth ions.

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Fluoroindate glasses co-doped with Pr3+/Er3+ for near-infrared luminescence applications

Scientific Reports ◽

10.1038/s41598-020-77943-w ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

Wojciech A. Pisarski ◽

Joanna Pisarska ◽

Marta Kuwik ◽

Marcin Kochanowicz ◽

Jacek Żmojda ◽

...

Keyword(s):

Rare Earth ◽

Near Infrared ◽

Rare Earth Ions ◽

Luminescence Spectra ◽

Nonradiative Relaxation ◽

Transfer Processes ◽

Direct Excitation ◽

Infrared Luminescence ◽

Doped Glass ◽

Co Doped

AbstractFluoroindate glasses co-doped with Pr3+/Er3+ ions were synthesized and their near-infrared luminescence properties have been examined under selective excitation wavelengths. For the Pr3+/Er3+ co-doped glass samples several radiative and nonradiative relaxation channels and their mechanisms are proposed under direct excitation of Pr3+ and/or Er3+. The energy transfer processes between Pr3+ and Er3+ ions in fluoroindate glasses were identified. In particular, broadband near-infrared luminescence (FWHM = 278 nm) associated to the 1G4 → 3H5 (Pr3+), 1D2 → 1G4 (Pr3+) and 4I13/2 → 4I15/2 (Er3+) transitions of rare earth ions in fluoroindate glass is successfully observed under direct excitation at 483 nm. Near-infrared luminescence spectra and their decays for glass samples co-doped with Pr3+/Er3+ are compared to the experimental results obtained for fluoroindate glasses singly doped with rare earth ions.

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Improved Infrared Emissions of Er3+-Tm3+ Co-Doped Al2O3 Thin Films: The Role of Cross Relaxation Among Rare Earth Ions

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2011.4004 ◽

2011 ◽

Vol 11 (12) ◽

pp. 10673-10676

Author(s):

Bo Zhou ◽

Zhisong Xiao ◽

Lu Yan ◽

Fang Zhu ◽

Feng Zhang ◽

...

Keyword(s):

Thin Films ◽

Rare Earth ◽

Cross Relaxation ◽

Rare Earth Ions ◽

Infrared Emissions ◽

Co Doped

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Optical properties of oxide glasses with semiconductor nanoparticles co-doped with rare earth ions

Chemical Physics Letters ◽

10.1016/j.cplett.2013.10.023 ◽

2013 ◽

Vol 588 ◽

pp. 188-192 ◽

Cited By ~ 10

Author(s):

M.C. Neto ◽

G.H. Silva ◽

A.P. Carmo ◽

A.S. Pinheiro ◽

N.O. Dantas ◽

...

Keyword(s):

Optical Properties ◽

Rare Earth ◽

Semiconductor Nanoparticles ◽

Rare Earth Ions ◽

Oxide Glasses ◽

Co Doped

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Influence of Sintering Temperature on the Thermoluminescence Spectra of MgSO4 Doped with RE(Tm,Dy) and Mn

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.664.57 ◽

2014 ◽

Vol 664 ◽

pp. 57-61

Author(s):

Jing Yuan Guo ◽

Qiang Tang ◽

Li Gao ◽

Ting Ting Lan ◽

Chun Xiang Zhang ◽

...

Keyword(s):

Rare Earth ◽

High Temperature ◽

Low Temperature ◽

Sintering Temperature ◽

Complex Structure ◽

Rare Earth Ions ◽

3 Dimensional ◽

Luminescence Process ◽

Co Doped ◽

The Rare Earth

In this paper, MgSO4:Dy,MgSO4:Tm and MgSO4:Mn phosphors are prepare by high temperature solid state reaction. The MgSO4:Dy or MgSO4:Tm powder are mixed and sintered with MgSO4:Mn respectively to obtain the co-doped MgSO4:Dy,Mn and MgSO4:Tm,Mn phosphors. The 3-dimensional thermoluminescence spectra of these two phosphors under different sintering temperature are measured.Results show that when the sintering temperature is below 800°C, Dy, Tm and Mn ions emissions are independent. However, when the sintering temperature was over 800°C, the emission peak of Mn becomes weaker, and so do the low temperature peaks of Dy and Tm, while the high temperature peaks of Dy and Tm become stronger. This indicated that the defect complex structure in the formation of the thermoluminescence material depends on the sintering temperature. As the sintering temperature rises, more and more Mn ions combine with the rare earth ions. Therefore, the luminescence process of the energy transfer of Mn ions to the rare earth ions can be observed and the suppression to low temperature peaks of Tm and Dy, and also shown in spectra.

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Photostimulated Luminescence Studies of Electron Trapping Materials SrS:Eu2+,RE (RE= Dy3+,Yb3+,Pr3+,Ho3+,Tm3+)

Materials Science Forum ◽

10.4028/www.scientific.net/msf.663-665.264 ◽

2010 ◽

Vol 663-665 ◽

pp. 264-267

Author(s):

Hai Yan Du ◽

Zhen Xing Liu ◽

Jia Yue Sun

Keyword(s):

Rare Earth ◽

Rare Earth Ions ◽

Fluorescence Properties ◽

Electron Trapping ◽

Photostimulated Luminescence ◽

Trivalent Rare Earth ◽

Sun Light ◽

Co Doped

Trivalent rare-earth ions, Dy3+, Yb3+, Pr3+, Ho3+, Tm3+, have been investigated as the co-doped auxiliary sensitizer for the electron trapping materials SrS:Eu2+ in order to enhance the fluorescence properties. It is found that Dy3+ and Ho3+ has the optimum photoluminescence stimulated luminescence (PSL) effect among the selected trivalent rare-earth ions. All the SrS: Eu2+ samples coped by different trivalent rare-earth ions can be stimulated by 980 nm laser after exposing to the conventional sun light, and they emit PSL with the peak located at 615 nm. The present research also indicates that some co-doped rare earth ions can increase fluorescence intensities of the traditional electron trapping materials SrS: Eu2+.

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Thermal and structural analysis of germanate glass and thin films co-doped with silver nanoparticles and rare earth ions with insights from visible and Raman spectroscopy

Vibrational Spectroscopy ◽

10.1016/j.vibspec.2016.10.001 ◽

2016 ◽

Vol 87 ◽

pp. 143-148 ◽

Cited By ~ 4

Author(s):

E.A. Carvalho ◽

A.M. Freitas ◽

G.H. Silva ◽

M.J.V. Bell ◽

L.R.P. Kassab ◽

...

Keyword(s):

Thin Films ◽

Raman Spectroscopy ◽

Silver Nanoparticles ◽

Rare Earth ◽

Structural Analysis ◽

Rare Earth Ions ◽

Germanate Glass ◽

Co Doped

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Preparation and tunable luminescence of CaCO3:Eu3+,Dy3+ phosphors

Functional Materials Letters ◽

10.1142/s1793604714500386 ◽

2014 ◽

Vol 07 (04) ◽

pp. 1450038 ◽

Cited By ~ 6

Author(s):

Yanwei Dong ◽

Ming Kang ◽

Ping Zhang ◽

Qijun Cheng ◽

Jie Wang

Keyword(s):

Rare Earth ◽

Uv Light ◽

Host Lattice ◽

Rare Earth Ions ◽

Precipitation Method ◽

Scanning Calorimetry ◽

Chromaticity Coordinates ◽

Co Precipitation ◽

Co Doped ◽

The Rare Earth

Phosphors based on calcium carbonate, co-doped with various Eu 3+ and Dy 3+ concentrations were prepared by microwave co-precipitation method. The prepared phosphors were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), thermogravimetry and differential scanning calorimetry (TG-DSC) and photoluminescence and photoluminescence excitation (PL-PLE) spectroscopy. Results showed that Dy 3+ and Eu 3+ ions were uniformly introduced into the host lattice of CaCO 3 taking the place of Ca 2+ ions. Under the excitation at 382 nm, the emission peak wavelengths were at 487 nm (4 F 9/2 → 6 H 15/2 of Dy 3+), 576 nm (4 F 9/2 → 6 H 13/2 of Dy 3+), and 614 nm (5 D 0 → 7 F 2 of Eu 3+). The luminescent intensities and emitting colors of Eu 3+- Dy 3+ co-doped CaCO 3 phosphors could be controlled by UV–violet excitations wavelengths or the rare-earth ions concentrations of Eu 3+ and Dy 3+ in phosphors. The chromaticity coordinates and photographs of samples under UV light showed the changes of the luminescence color intuitively through the varing UV–violet excitations wavelengths or the rare-earth ions concentrations of Eu 3+ and Dy 3+.

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