Optical and luminescence properties of Eu&lt;SUP&gt;3+&lt;/SUP&gt;-doped phosphate based glasses

Rasool, Shaik Nayab; Moorthy, Lalapeta Rama; Jayasankar, C.K.

doi:10.1166/mex.2013.1123

Cited by 68 publications

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“…Asymmetry ratio, which is defined as a PL intensity ratio of electric dipole 5 D 0 – 7 F 2 and magnetic dipole 5 D 0 – 7 F 1 intensities (∧ = I ( 5 D 0 – 7 F 2 )/ I ( 5 D 0 – 7 F 1 )), estimated for discussion on the degree in asymmetry of local structure around Eu 3+ ions [ 28 , 29 , 30 ]. It is well known that 5 D 0 – 7 F 2 transition intensity is much affected by local asymmetry around Eu 3+ and 5 D 0 – 7 F 1 transition is independent of the local structure because of the respective natures of electric and magnetic dipole transitions [ 31 ]. Asymmetry ratios of 15mol% Ca 2.98 Eu 0.02 WO 6 glass, glass-ceramic and Ca 0.98 Eu 0.02 WO 4 are estimated as 3.0, 2.1, and 7.5, respectively.…”

Section: Resultsmentioning

confidence: 99%

Thermal Evolutions to Glass-Ceramics Bearing Calcium Tungstate Crystals in Borate Glasses Doped with Photoluminescent Eu3+ Ions

et al. 2021

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Thermal evolutions of calcium-tungstate-borate glasses were investigated for the development of luminescent glass-ceramics by using Eu3+ dopant in a borate glass matrix with calcium tungstate, which was expected to have a combined character of glass and ceramics. This study revealed that single-phase precipitation of CaWO4 crystals in borate glass matrix was possible by heat-treatment at a temperature higher than glass transition temperature Tg for (100−x) (33CaO-67B2O3)−xCa3WO6 (x = 8−15 mol%). Additionally, the crystallization of CaWO4 was found by Raman spectroscopy due to the formation of W=O double bondings of WO4 tetrahedra in the pristine glass despite starting with the higher calcium content of Ca3WO6. Eu3+ ions were excluded from the CaWO4 crystals and positioned in the borate glass phase as a stable site for them, which provided local environments in higher symmetry around Eu3+ ions.

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Section: Resultsmentioning

confidence: 99%

Thermal Evolutions to Glass-Ceramics Bearing Calcium Tungstate Crystals in Borate Glasses Doped with Photoluminescent Eu3+ Ions

et al. 2021

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“…Eu 3+ -doped materials are capable of producing red color emission with higher luminescence efficiency in the field emission technology and light-emitting diodes (LEDs). [17] In this paper, we report europium doped lithium tetraborate (Eu:LTB) single crystal by the micro-capillary Czochralski crystal pulling technique for the first time, and structural and luminescence properties of the grown crystals are discussed.…”

Section: Introductionmentioning

confidence: 99%

Structural and photoluminescence studies on europium-doped lithium tetraborate (Eu:Li ₂ B ₄ O ₇ ) single crystal grown by microtube Czochralski (μT-Cz) technique

et al. 2016

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Rare earth europium (Eu 3+ )-doped lithium tetraborate (Eu:Li 2 B 4 O 7 ) crystal is grown from its stoichiometric melt by microtube Czochralski pulling technique (µT-Cz) for the first time. The grown crystals are subjected to powder x-ray diffraction (PXRD) analysis which reveals the tetragonal crystal structure of the crystals. UV-vis-NIR spectral analysis is carried out to study the optical characteristics of the grown crystals. The crystal is transparent in the entire visible region, and the lower cutoff is observed to be at 304 nm. The existence of BO 3 andBO 4 bonding structure and the molecular associations are analyzed by Fourier transform infrared (FTIR) spectroscopy. The results of excitation and emission-photoluminescence spectra of europium ion incorporated in lithium tetraborate (LTB) single crystal reveal that the observations of peaks at 258, 297, and 318 nm in the excitation spectra and peaks at 579, 591, 597, 613, and 651 nm are observed in the emission spectra. The chromaticity coordinates are calculated from the emission spectra, and the emission intensity of the grown crystal is characterized through a CIE 1931 (Commission International d'Eclairage) color chromaticity diagram.

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“…Additionally, various other materials have also been applied for this purpose, such as, borates [1], phosphors [2], MOFs [3], different types of mixed metal oxides including CeO 2 , ZnO, ZnAl 2 O 4 [4], Cr-doped ZnGa 2 O 4 [5]. In recent times, scientists have paid more attention towards the preparation and characterization of trivalent lanthanide doped materials due to their applicability as solid-state laser media, fiber amplifiers, infrared to-visible up-converters, field emission displays [6,7] and, therefore, numerous luminescent materials were synthesized with suitable rare earth activators [Ln 3+ ].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photoluminescence and Photocatalytic Efficiency of La-Doped Bismuth Molybdate: Its Preparation and Characterization

et al. 2019

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Herein, a systematic study of the enhanced physicochemical properties of lanthanide doped (La-doped) bismuth molybdate (Bi2MoO6) is performed. For this purpose, Bi2MoO6 and La-doped Bi2MoO6 were prepared by the sol-gel method. BiCl3, Na2MoO4·2H2O, and LaCl3·7H2O were taken as the main precursors while sodium dodecyl sulfate was used as a surfactant. Both Bi2MoO6 and La-doped Bi2MoO6 were calcined at 650 °C for 2 h. These prepared materials were characterized by spectroscopic techniques such as UV–VIS, FT-IR, XRD, photoluminescence, XPS, along with other techniques such as SEM, TEM, TGA, etc. The investigation of luminescence behavior revealed that the La-doped Bi2MoO6 nanocomposite exhibited much greater luminescence compared to the undoped Bi2MoO6. The photocatalytic behavior of the prepared materials was explored by studying the degradation of methylene blue (MB) at room temperature. The degradation of MB with Bi2MoO6 and La-doped bismuth molybdate were observed to be 68% and 75% @ 45 s, respectively, indicating an enhancement of catalytic performance due to the La doping.

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Optical and luminescence properties of Eu<SUP>3+</SUP>-doped phosphate based glasses

Cited by 68 publications

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Thermal Evolutions to Glass-Ceramics Bearing Calcium Tungstate Crystals in Borate Glasses Doped with Photoluminescent Eu3+ Ions

Thermal Evolutions to Glass-Ceramics Bearing Calcium Tungstate Crystals in Borate Glasses Doped with Photoluminescent Eu3+ Ions

Structural and photoluminescence studies on europium-doped lithium tetraborate (Eu:Li ₂ B ₄ O ₇ ) single crystal grown by microtube Czochralski (μT-Cz) technique

Enhanced Photoluminescence and Photocatalytic Efficiency of La-Doped Bismuth Molybdate: Its Preparation and Characterization

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Optical and luminescence properties of Eu<SUP>3+</SUP>-doped phosphate based glasses

Cited by 68 publications

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Thermal Evolutions to Glass-Ceramics Bearing Calcium Tungstate Crystals in Borate Glasses Doped with Photoluminescent Eu3+ Ions

Thermal Evolutions to Glass-Ceramics Bearing Calcium Tungstate Crystals in Borate Glasses Doped with Photoluminescent Eu3+ Ions

Structural and photoluminescence studies on europium-doped lithium tetraborate (Eu:Li 2 B 4 O 7 ) single crystal grown by microtube Czochralski (μT-Cz) technique

Enhanced Photoluminescence and Photocatalytic Efficiency of La-Doped Bismuth Molybdate: Its Preparation and Characterization

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Structural and photoluminescence studies on europium-doped lithium tetraborate (Eu:Li ₂ B ₄ O ₇ ) single crystal grown by microtube Czochralski (μT-Cz) technique