Spectroscopic Properties of Er 3+ Doped Zinc Lithium Arsenic Strontium Vanadium Bismuth Borate Glasses (original) (raw)
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Spectroscopic Properties of Er3+ Doped Zinc Lithium Bismuth Borate Glasses
IOSR Journal of Applied Physics, 2016
Zinc lithium bismuth borate glasses containing Er 3+ in (25-x): Bi 2 O 3 :20Li 2 O:20ZnO: 35B 2 O 3 :xEr 2 O 3 (where x=1, 1.5,2 mol %) have been prepared by melt-quenching method. The amorphous nature of the glasses was confirmed by x-ray diffraction studies. Optical absorption and fluorescence spectra were recorded at room temperature for all glass samples. Judd-Ofelt intensity parameters Ω λ (λ=2, 4, 6) are evaluated from the intensities of various absorption bands of optical absorption spectra. Using these intensity parameters various radiative properties like spontaneous emission probability, branching ratio, radiative life time and stimulated emission cross-section of various emission lines have been evaluated.
Spectral and Transmittance Properties of Er 3+ Doped Zinc Lithium Lead Calcium Borophosphate Glasses
International Journal for Research in Applied Science and Engineering Technology (IJRASET), 2021
Zinc lithium lead calcium borophosphate glasses containing Er 3+ in (40x):P 2 O 5 :10ZnO:10Li 2 O:10PbO:10CaO:20B 2 O 3 :xEr 2 O 3 (where x=1, 1.5,2 mol %) have been prepared by melt-quenching method. The amorphous nature of the glasses was confirmed by x-ray diffraction studies. Optical absorption, Excitation, fluorescence and Transmittance spectra were recorded at room temperature for all glass samples. Judd-Ofelt intensity parameters Ω λ (λ=2, 4, 6) are evaluated from the intensities of various absorption bands of optical absorption spectra. Using these intensity parameters various radiative properties like spontaneous emission probability, branching ratio, radiative life time and stimulated emission cross-section of various emission lines have been evaluated.
Journal of Alloys and Compounds, 2011
Glasses having composition 20ZnO•xBi 2 O 3 •(79.5 − x)B 2 O 3 •0.5Pr 6 O 11 were prepared by melt quench technique. The amorphous nature of the prepared glass samples was confirmed by X-ray diffraction. The spectroscopic properties of these glasses were investigated by recording optical absorption and fluorescence spectra. The structural investigations of the glasses were carried out by recording the IR spectra. The optical properties of Pr 3+ ions doped zinc borate glasses with varying concentration of bismuth oxide have been studied. The Judd-Ofelt intensity parameters˝ (= 2, 4, 6) and other radiative properties like radiative transition probability, radiative life time, branching ratio and stimulated emission crosssection of the prepared glasses have been calculated. The variation of˝2 with Bi 2 O 3 content has been attributed to changes in the asymmetry of the ligand field at the rare earth ion site and to the changes in their rare earth oxygen (RE-O) covalency. The branching ratio for 3 P 0 → 3 F 2 transition is 42% and the predicted spontaneous radiative transition probability rates are fairly high (14,347-14,607 s −1). This is beneficial for lasing emission. The stimulated emission cross-section for all the emission bands has been calculated.
Materials Research Bulletin, 2015
Zinc bismuth borate (ZBB) glasses with chemical composition of (60 À x) B 2 O 3 : 30Bi 2 O 3 : 10ZnO: xEu 2 O 3 for different Eu 2 O 3 concentrations of x = 1, 3, 5, 7 and 9 mol% were prepared by the conventional melt quenching technique. The density and molar volume of the glasses have been found to increase with Eu 2 O 3 concentration. The IR studies indicated that these glasses were made up of [BiO 3 ], [BO 3 ], [BO 4 ] and [BO] basic structural units. The absorption spectra had revealed two intense bands due to 7 F 0 ! 7 F 6 (2076 nm) and 7 F 1 ! 7 F 6 (2198 nm) transitions in the NIR regions. The fractional populations of the (7 F 0) and (7 F 1) ground state were 65% and 35% , respectively. Five luminescence bands were observed at 579 nm (5 D 0 ! 7 F 0), 589 nm (5 D 0 ! 7 F 1), 613 nm (5 D 0 ! 7 F 2), 651 nm (5 D 0 ! 7 F 3) and 696 nm (5 D 0 ! 7 F 4), when excited by a 465 nm source, the most intense red emission was found at 613 nm. A shorter decay time of 5 D 0 excited state was found with increasing of Eu 3+ concentration as more asymmetries were created around Eu 3+. For comparison, further investigations were carried out with two other glass structures; bismuth borate glass (BB) and zinc borate glass (ZB), doped with Eu 3+ in the same range. The ZBB glasses have exhibited with the highest emission intensity especially at 613 nm; the intensity for the ZBB was around 7 times of the ZB and twice of the BB glasses.
Zinc Alumino Bismuth borate (ZnAlBiB) optical glasses of different compositions doped with 1 mol% of Dy 3+ ions were prepared by the conventional melt quenching technique and investigated by the XRD, optical absorption, photoluminescence and decay curve analysis. The glassy nature of ZnAlBiB host has been confirmed through XRD measurements. From the absorption spectral measurements, the three phenomenological intensity parameters Ω λ (λ ¼2,4 and 6) have been determined from the Judd–Ofelt (J–O) theory. By using JO intensity parameters, several radiative properties such as transition probability (A R), branching ratio (β R) and radiative lifetimes (τ R) have been determined. The room temperature photoluminescence spectra of Dy 3+ ions doped ZnAlBiB glasses gave two relatively intense emission bands 4 F 9/2-6 H 15/2 (blue), 4 F 9/2-6 H 13/2 (yellow) along with one faint band. The higher values of branching ratios and stimulated emission cross-sections for the 4 F 9/2-6 H 13/2 transition suggest the utility of these glasses as potential laser materials. The decay curves have been recorded for all the ZnAlBiB glasses to measure the quantum efficiency of these glasses by measuring the experimental lifetime (τ exp). The radiative properties and CIE chromaticity coordinates have been evaluated from the emission spectra to understand the feasibility of these glasses for optoelectronic devices.
Visible luminescence characteristics of Sm 3 þ doped Zinc Alumino Bismuth Borate glasses
Zinc Alumino Bismuth Borate (ZnAlBiB) glasses at different compositions doped with 1 mol% of Sm 3 þ ions were prepared by using the melt quenching technique and investigated by XRD, optical absorption, emission and decay curve analysis to understand the visible luminescence of these glasses. From the absorption spectra the JO parameters are evaluated and are used to calculate the radiative properties such as transition probability, radiative lifetime, branching ratio and absorption cross-sections for various fluorescent levels of Sm 3 þ ions. The emission spectra of Sm 3 þ ions doped ZnAlBiB glasses show two intense emission bands 4 G 5/2-6 H 7/2 (orange) and 4 G 5/2-6 H 9/2 (red) for which the stimulated emission cross-section and branching ratios are evaluated to understand the potentiality of these materials as visible lasers. The decay profiles for the 4 G 5/2 fluorescent level of Sm 3 þ doped ZnAlBiB glasses have been recorded to measure the quantum efficiency (η) of these glasses. The strong visible emissions, large stimulated emission cross-sections, high branching ratios and good quantum efficiencies observed for the present ZnAlBiB glasses suggest the suitability of these glasses as laser and photonic devices operating in visible region.
Spectroscopic Properties of Er 3+ Doped in Zinc Lithium Calcium Potassiumniobate Phosphate Glasses
International Journal for Research in Applied Science & Engineering Technology (IJRASET), 2022
Zinc lithium calcium potassiumniobate phosphate glasses containing Er 3+ in (45-x): P 2 O 5 :10ZnO:10Li 2 O:10CaO:10K 2 O:15Nb 2 O 5 :xEr 2 O 3. (where x=1, 1.5,2 mol %) have been prepared by melt-quenching method. The amorphous nature of the glasses was confirmed by x-ray diffraction studies. Optical absorption, Excitation, and fluorescence spectra were recorded at room temperature for all glass samples. Judd-Ofelt intensity parameters Ω λ (λ=2, 4, 6) are evaluated from the intensities of various absorption bands of optical absorption spectra. Using these intensity parameters various radiative properties like spontaneous emission probability, branching ratio, radiative life time and stimulated emission crosssection of various emission lines have been evaluated.
Tb 3 þ doped Zinc Alumino Bismuth Borate glasses for green emitting luminescent devices
Zinc Alumino Bismuth Borate (ZnAlBiB) glasses doped with terbium (Tb 3 þ) ions with a chemical composition 20ZnO–10Al 2 O 3 –(10 À x)Bi 2 O 3 –60B 2 O 3 À xTb 2 O 3 (x ¼ 0.1, 0.5, 1.0, 1.5, 2.0, 2.5 and 3.0 mol%) were prepared by a conventional melt quenching method and studied their optical absorption, photoluminescence and decay spectral properties. The Judd–Ofelt (J–O) parameters evaluated from the experimental oscillator strengths were used to measure the radiative properties for the prominent luminescent transitions of Tb 3 þ ions such as 5 D 4-7 F 6 , 7 F 5 , 7 F 4 and 7 F 3. The effect of Tb 3 þ ion concentration on the luminescence process observed in the visible region was discussed in detail. The emission spectra recorded for all the ZnAlBiB glasses doped with Tb 3 þ ions, show an intense peak in green region at 542 nm. The stimulated emission cross-section, branching ratios and quantum efficiency values evaluated for green emission (5 D 4-7 F 5) suggests the utility of these glasses for green luminescence applications. It was found that, within the concentration range investigated, 2.5 mol% of Tb 3 þ doped ZnAlBiB glass is most suitable for green luminescence applications at 542 nm in principle.
Scientific Reports, 2023
A host glass network of 70B 2 O 3-10Pb 3 O 4-18ZnO-2Er 2 O 3 (ErCoCu1) was proposed and the impact of 1 mol% of Co or/and Cu ions on its structural, thermal, optical, and green emission properties was studied extensively. The X-ray diffraction spectra confirmed the amorphous structure of the produced glasses. Density and density-based parameters behavior showed that the Co or/and Cu ions fill the interstitial positions of the proposed ErCoCu1 network, causing its compactness. Both ATR-FTIR and Raman Spectra affirmed the formation of the fundamental structural units of the borate network, B-O-B linkage, BO 3 , and BO 4. Additionally, the penetration of Co or/and Cu ions inside the ErCoCu1 converts the tetrahedral BO 4 units to triangle BO 3 causing its richness by non-bridging oxygens. The addition of Co or/and Cu reduces the glass transition temperature as a result of the conversion of the BO 4 to BO 3 units. Optical absorption spectra for the host glass ErCoCu1 showed many of the distinguished absorption bands of the Er 3+ ion. Penetration of Co ion generates two broadbands referring to the presence of Co 2+ ions in both tetrahedral and octahedral coordination and Co 3+ ions in the tetrahedral coordination. In the Cu-doped glasses, the characteristic absorption bands of Cu 2+ and Cu + were observed. A green emission was generated from the ErCoCu1 glass under 380 nm excitation wavelength. Moreover, no significant effect of Co or/and Cu on the emission spectra was recorded. The considered glasses had appropriate properties qualifying them for optoelectronics and nonlinear optics applications.