Optical properties and luminescence kinetics of Ln1.9Pr0.1(WO4)3 (where Ln=Gd, La) immobilized in silica xerogel

Grobelna, Beata; Bojarski, Piotr; Kukliński, B.; Kubicki, A.; Synak, Anna

doi:10.1016/j.optmat.2011.07.011

Cited by 13 publications

(4 citation statements)

References 26 publications

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“…First of they allow to us manipulate the color of emitting light. Trivalent Eu 3+ , Pr 3+ ions show intense red emission and Tb 3+ ions show intense green emission [6][7][8]. However, Dy 3+ ions are known as two primary color phosphors.…”

Section: Introductionmentioning

confidence: 99%

Luminescence of Gd₂(WO₄)₃:Ln³⁺at ambient and high hydrostatic pressure

Mahlik

Lazarowska

Grobelna

2012

J. Phys.: Condens. Matter

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This paper presents a spectroscopic characterization of Gd(2)(WO(4))(3):Ln(3+) (Ln=Eu, Pr, Tb and Dy). The luminescence and luminescence kinetics were measured under pressures up to 250 kbar. It was found that pressure quenches the luminescence of Pr(3+) and Tb(3+), whereas the emission of Eu(3+) and Dy(3+) was stable up to 250 kbar. This effect was related to a decrease in the ionization energy of Pr(3+) and Tb(3+) caused by pressure induced increase in energies of the Ln(2+) and Ln(3+) ions with respect to the band edges. Analysis of emission and excitation spectra allowed us to estimate the energies of the ground states of Ln(3+) and Ln(2+) with respect to the valence and conduction band edges of the Gd(2)(WO(4))(3) host. Differences between energies of the ground states of Ln(2+) and Ln(3+) have also been calculated.

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Section: Introductionmentioning

confidence: 99%

Luminescence of Gd₂(WO₄)₃:Ln³⁺at ambient and high hydrostatic pressure

Mahlik

Lazarowska

Grobelna

2012

J. Phys.: Condens. Matter

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“…Time-resolved emission spectra (TRES) were acquired using a pulsed spectrofluorometer described in detail [27]. The laser system PL2251-20 with an Nd:YAG laser and a PG 401/SH optical parametric generator emitting pulses of FWHMz30 ps from EXSPLA was used as the excitation light source.…”

Section: Borate-bismuth Glasses With a Nominal Composition (In Mol%mentioning

confidence: 99%

“…SrF 2 nanocrystals are usually grown in glasses by annealing them at a suitable temperature above the glass transition temperature (T g ). The size of nanocrystals can be then controlled by changing heat treatment parameters, but it also depends on the type of glass structure [23][24][25][26][27]. In the case of borate-bismuth glass, the problem is more complicated because in this glass it is possible to obtain at least five stable crystalline phases of Bi 2 O 3 -B 2 O 3 [11] and metastable bismuth orthoborate phases [28].…”

Section: Introductionmentioning

confidence: 99%

From Structure to Luminescent Properties of B2O3-Bi2O3-SrF2 Glass and Glass-Ceramics Doped with Eu3+ Ions

et al. 2021

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Glass-ceramics with the composition B2O3-Bi2O3-SrF2 were synthesized by the conventional melt-quenching technique and subsequent crystallization of the parental glasses. The temperature at which the ceramization was carried out was selected based on differential scanning calorimetry (DSC) analysis. The structure of the studied materials and the formation of SrF2 nanocrystals were confirmed by the Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) techniques. It was found that the amount of strontium fluoride introduced into the parental borate-bismuth glass has a significant impact on the growth of SrF2 nanocrystals. In particular, the influence of the crystalline SrF2 phase on luminescence intensity and kinetics was studied using Eu2O3-doped samples. An increase in luminescence intensity was observed in the samples in which SrF2 nanocrystals were formed. This is most likely related to the fact that some of the Eu3+ ions were (after annealing of the glass) located in the crystalline structure of strontium fluoride. This was confirmed both by the luminescence lifetime obtained based on the luminescence decay curves and the calculated Judd–Ofelt parameters, Ω2 and Ω4. The results achieved confirm that the glasses and glass-ceramics described in this work could be considered as a new phosphor for light-emitting diodes (LEDs).

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“…Thus, there are a fairly large number of works describing the properties of compounds doped with praseodymium. As a rule, in the main majority they deal with the luminescent properties, − although there are also publications considering the investigations that have been carried out by differential thermal analysis and thermogravimetry. , The latest work also includes studying the magnetic properties of the compounds doped with lanthanides by the electron paramagnetic resonance method.…”

Section: Introductionmentioning

confidence: 99%

Structural Characteristics and Thermodynamic Functions of Compounds Ba(La_1–xPr_x)₂WO₇ (x from 0.005 to 0.05)

Bissengaliyeva¹,

Zhakupov

Knyazev

et al. 2019

J. Chem. Eng. Data

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A sol–gel method was used to synthesize barium, lanthanum, and tungsten-based samples doped with praseodymium Ba(La1–x Pr x )2WO7, where x = 0.005 ÷ 0.05. The morphological and elemental analyses of the samples were carried out by electron probe microanalysis. A full-profile refinement of the crystal structure of the compounds belonging to the monoclinic system with the space group P1121/b was carried out. Using the adiabatic calorimetry method, the heat capacity of the samples was measured and the thermodynamic functions in the range of 5–320 K were found. In the heat capacity of the samples below 15 K, anomalies were detected and the excessive and lattice heat capacities were determined.

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Optical properties and luminescence kinetics of Ln1.9Pr0.1(WO4)3 (where Ln=Gd, La) immobilized in silica xerogel

Cited by 13 publications

References 26 publications

Luminescence of Gd₂(WO₄)₃:Ln³⁺at ambient and high hydrostatic pressure

Luminescence of Gd₂(WO₄)₃:Ln³⁺at ambient and high hydrostatic pressure

From Structure to Luminescent Properties of B2O3-Bi2O3-SrF2 Glass and Glass-Ceramics Doped with Eu3+ Ions

Structural Characteristics and Thermodynamic Functions of Compounds Ba(La_1–xPr_x)₂WO₇ (x from 0.005 to 0.05)

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Optical properties and luminescence kinetics of Ln1.9Pr0.1(WO4)3 (where Ln=Gd, La) immobilized in silica xerogel

Cited by 13 publications

References 26 publications

Luminescence of Gd2(WO4)3:Ln3+at ambient and high hydrostatic pressure

Luminescence of Gd2(WO4)3:Ln3+at ambient and high hydrostatic pressure

From Structure to Luminescent Properties of B2O3-Bi2O3-SrF2 Glass and Glass-Ceramics Doped with Eu3+ Ions

Structural Characteristics and Thermodynamic Functions of Compounds Ba(La1–xPrx)2WO7 (x from 0.005 to 0.05)

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Luminescence of Gd₂(WO₄)₃:Ln³⁺at ambient and high hydrostatic pressure

Luminescence of Gd₂(WO₄)₃:Ln³⁺at ambient and high hydrostatic pressure

Structural Characteristics and Thermodynamic Functions of Compounds Ba(La_1–xPr_x)₂WO₇ (x from 0.005 to 0.05)