Upconversion and near infrared emission properties of a novel Er3+/Yb3+ codoped fluoro-tellurite glass

Maaoui, A.; Slimen, Fedia Ben; Haouari, Mohamed; Bulou, A.; Boulard, B.; Ouada, H. Ben

doi:10.1016/j.jallcom.2016.04.112

Cited by 31 publications

(4 citation statements)

References 54 publications

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“…Rare-earth elements "sometimes called lanthanides", and rare earth doped materials have been widely researched due to their diverse optical applications in the fields of solar energy, up-conversion, lasers, color displays, optical amplifiers and temperature sensors, etc. (Monteiro et al 2013;Lozano et al 2013;Maaoui et al 2016;Mohanty and Rai 2014;Annapoorani et al 2016;Maheshvaran et al 1079;Seshadri et al 2014;Sajna et al 2015;Maqbool et al 2015). Lanthanum is the first element in the lanthanide group with electronic configuration [Xe] 5d 1 6s 2 is one of the most common rare earth elements occupying about 14.1% of total rare earth resources (Zhao et al 2011) which makes it economically suitable for optical application industries.…”

Section: Introductionmentioning

confidence: 99%

Effect of lanthanum doping on the structure and optical properties of nanocrystalline vanadium pentoxide films prepared by sol–gel method

et al. 2023

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The structural and optical properties of lanthanum oxide doped nanocrystalline vanadium pentoxide films with the chemical composition xLa2O3-(1-x)V2O5.nH2O (where x = 0.25, 0.50 and 1.0 mol%) prepared by sol–gel method were studied. The XRD analysis also revealed that the (002) line is noticeable in the pure film and gets sharper by the addition of Lanthanum, which indicates a layer of intercalation between the vanadium layers. The average crystallite size decreased with increasing Lanthanum content from 4.45 nm to 3.57 nm. By using double-beam UV–VIS spectrophotometers, the optical properties were studied by measuring the absorption, reflectance and transmittance of the prepared films. Some optical parameters like absorption coefficient α, dispersion energy parameters, refractive index n, optical band gap Eop for various transition mechanisms, real parts and imaginary part of the dielectric constants and effective mass were calculated. The absorption coefficient slightly increases with increasing La content, which can be attributed to the increasing of lattice distortion as a result of crystallite size increasing as indicated in the XRD. The transition mechanism was found to be indirect allowed type with optical band gap Eop increasing relative to the La content. By assuming hydrogen like model, the carrier’s contents N were deduced. The absorption spectrum behavior in visible and UV region suggests a promising solution for solar cells and optical-electronic applications.

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Section: Introductionmentioning

confidence: 99%

Effect of lanthanum doping on the structure and optical properties of nanocrystalline vanadium pentoxide films prepared by sol–gel method

et al. 2023

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“…This property leads to minimization of the nonradiative losses. Tellurite glasses also exhibit good solubility of rare earth ions that allows for possible employment of their f-f transitions in order to obtain efficient light sources with tunable emission color [7,8].…”

Section: Introductionmentioning

confidence: 99%

Heat Treatment Effect on Eu³⁺ Doped TeO₂-BaO-Bi₂O₃ Glass Systems with Ag Nanoparticles

Lewandowski

Dembski

Walas

et al. 2017

Journal of Nanomaterials

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Glass systems of 73TeO 2 -4BaO-3Bi 2 O 3 -2Eu 2 O 3 -xAg (in molar ratio where x = 0, 1, 2, and 3) compositions have been successfully synthesized. Silver nanoparticles were obtained with the employment of heat treatment (HT) procedure executed at 350 ∘ C. Glass transition temperatures of different compositions have been determined through DSC measurements. XRD results presented characteristic amorphous halo indicating lack of long range order in the samples. FTIR structural studies revealed that glass matrix is mainly composed of TeO 3 and TeO 4 species and is stable after different applied heat treatment times. X-ray photoelectron spectroscopy (XPS) measurements confirmed that in selected samples part of Ag ions changed oxidation state to form Ag 0 species. TEM measurements revealed nanoparticles of size in the range of 20-40 nm. UV-vis absorption results demonstrated characteristic transitions of Eu 3+ ions. Additionally, UV-vis spectra of samples heat-treated for 6, 12, 24, and 48 hours presented bands related to silver nanoparticles. Photoluminescence (PL) studies have been performed with excitation wavelength of exc = 395 nm. Obtained spectra exhibited peaks due to 5 D 0 -7 F J (where = 2, 3, 4) and 5 D 1 -7 F J (where = 1, 2, 3) transitions of Eu 3+ . Moreover, luminescence measurement indicated enhancement of rare earth ions emissions in several of the annealed samples. Increase of emission intensity of about 35% has been observed.

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“…The ET2 process from the 2 F 5/2 level to the 4 F 9/2 level and CR1 also supports the red luminescence of Er 3+ ions. 50 In addition, the 4 I 9/2 → 4 I 15/2 transition corresponds to the 800 nm emission created by the CR2 process. In the CR2 process, while a part of the population in the 4 I 13/2 level relaxes to the ground state, they transfer their energy to other parts of the population at the same level and are excited to the 4 I 9/2 level from 4 I 13/2 .…”

Section: Glass Materialsmentioning

confidence: 99%

Investigation of Up Conversion Emissions of Er³⁺/Yb³⁺ Codoped TeO₂-B₂O₃-Nb₂O₅-ZnO-WO₃-TiO₂ Glass Systems for Optical Thermometry

Caner

Sümer

Doğan

et al. 2023

ECS J. Solid State Sci. Technol.

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The conventional melt quenching technique was used to create Er3+/Yb3+ doped TeO2-B2O3-Nb2O5-ZnO-WO3-TiO2 glasses. The upconversion luminescence characteristics of the glasses were examined under 975 nm laser excitation at different powers. Luminescence intensities increased with increasing pump power until a certain power value was reached, at which point they declined. Lower pump power levels resulted in stronger green emissions, while higher pump power values resulted in stronger red emissions. The intensity-power curve was used to compute the number of transition photons. The calculations show that the 2H11/2 → 4I15/2 and 4S3/2 → 4I15/2 transitions are based the sequential absorption of two photons. With increased pump power, the (x, y) color coordinates shifted from green to red on the CIE diagram. The glasses' temperature-dependent luminescence was obtained. The intensity ratio approach was used to calculate the temperature sensitivity of the glasses. Maximum absolute sensitivity was found to be 0.0032 K-1 at 560 K for the TeO2 based glass with 1.25 mol% Er3+.

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Upconversion and near infrared emission properties of a novel Er3+/Yb3+ codoped fluoro-tellurite glass

Cited by 31 publications

References 54 publications

Effect of lanthanum doping on the structure and optical properties of nanocrystalline vanadium pentoxide films prepared by sol–gel method

Effect of lanthanum doping on the structure and optical properties of nanocrystalline vanadium pentoxide films prepared by sol–gel method

Heat Treatment Effect on Eu³⁺ Doped TeO₂-BaO-Bi₂O₃ Glass Systems with Ag Nanoparticles

Investigation of Up Conversion Emissions of Er³⁺/Yb³⁺ Codoped TeO₂-B₂O₃-Nb₂O₅-ZnO-WO₃-TiO₂ Glass Systems for Optical Thermometry

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Upconversion and near infrared emission properties of a novel Er3+/Yb3+ codoped fluoro-tellurite glass

Cited by 31 publications

References 54 publications

Effect of lanthanum doping on the structure and optical properties of nanocrystalline vanadium pentoxide films prepared by sol–gel method

Effect of lanthanum doping on the structure and optical properties of nanocrystalline vanadium pentoxide films prepared by sol–gel method

Heat Treatment Effect on Eu3+ Doped TeO2-BaO-Bi2O3 Glass Systems with Ag Nanoparticles

Investigation of Up Conversion Emissions of Er3+/Yb3+ Codoped TeO2-B2O3-Nb2O5-ZnO-WO3-TiO2 Glass Systems for Optical Thermometry

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Heat Treatment Effect on Eu³⁺ Doped TeO₂-BaO-Bi₂O₃ Glass Systems with Ag Nanoparticles

Investigation of Up Conversion Emissions of Er³⁺/Yb³⁺ Codoped TeO₂-B₂O₃-Nb₂O₅-ZnO-WO₃-TiO₂ Glass Systems for Optical Thermometry