Thermal analyses, spectral characterization and structural interpretation of Nd3+/Er3+ ions co-doped TeO2-ZnCl2 glasses system

Ahmed, K.; Ibrahim, Saeed Omer; Sahar, Md. Rahim; Mawlud, Saman Q.; Khizir, Hersh Ahmed

doi:10.1063/1.5004285

Cited by 7 publications

(3 citation statements)

References 22 publications

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“…This leads to a higher gain in the laser medium, which is essential for laser operation. A higher gain allows the laser to achieve threshold more easily and generate a more intense laser beam [77]. The prepared TPBE2 glass sample is better candidate than those reported in Table 8, due to its large stimulated emission cross-section, high optical gain and high quantum efficiency.…”

Section: Photoluminescence Analysismentioning

confidence: 99%

Spectroscopic Characteristics and Radiative Parameters of Er+3 Doped Ternary Lead Bismuth Tellurite Glass: Judd-Ofelt Analysis

Ahmed,

Mawlud

2023

Preprint

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Er+ 3doped lead-bismuth tellurite glasses with the composition (75-x) TeO2 − 15 PbO – 10 Bi2O3 - xEr2O3 where (x = 0, 0.5, 1, 1.5, 2 and 2.5 mole%) were synthesized by using melt quenching technique. The influence of Er3+ doping was evaluated through physical and optical properties. The non-crystalline nature of the samples was analyzed by XRD. The density of the samples was increased from 6.387 to 6.528 g.cm− 3. The absorption spectra show eight transition bands corresponding to the transitions from 4I15/2 to 4I13/2, 4I11/2, 4I9/2, 4F9/2, 4S3/2, 4H11/2, 4F7/2 and 4F5/2, respectively. The experimental and calculated oscillator strengths were calculated based on the Judd-Ofelt theory. The intensity parameters follow the trend Ω2 > Ω6 > Ω4. Three emission bands were observed from the fluorescence spectra. The green transition 4S3/2 →4I15/2 is the strongest among other transitions. The color coordinates were determined by using CIE 1931 chromaticity diagram. The highest quantum efficiency was 95.11% for the transition 4S3/2 →4I15/2. The results suggest that the TPBE2 glass is a great promising candidate for photonic applications and fabrication of laser optical devices.

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Section: Photoluminescence Analysismentioning

confidence: 99%

Spectroscopic Characteristics and Radiative Parameters of Er+3 Doped Ternary Lead Bismuth Tellurite Glass: Judd-Ofelt Analysis

Ahmed,

Mawlud

2023

Preprint

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“…The diminishing of molar volume can be ascribed to the strong bond strength of Zn-O bond in comparison to P-O-P and P-O bonds which results in smaller bond lengths consequently causing a tightening of the glass network [27,29,30]. The replacement of P 2 O 5 by ZnO is the primary cause of systematic decreases as the ionic radii of oxygen ions are higher when compared with radii of both the Zn and P ions [31,32]. Oxygen packing density (OPD) of the glasses varied from 76.389 to 72.667 mol/L and were found to decrease with the content of Zinc oxide (2 to 10 mol%) which is attributing to the less tightly packing of oxygen atoms in the glass network [22].…”

Section: Physical Parameters Of the Bioglassesmentioning

confidence: 99%

Investigations on Physico-Mechanical and Spectral Studies of Zn2+ Doped P2O5-Based Bioglass System

et al. 2020

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ZnO incorporated phosphate based bioglasses with the composition xZnO–22Na2O–24CaO–(54-X)P2O5 (where X = 2, 4, 6, 8, 10 mol%) were developed by melt-quenching process. The physical, thermal and other structural properties of the glasses were studied in detail. By employing various characterization techniques such as X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM) in addition to the energy dispersion spectroscopy (EDS), and Raman spectroscopy, the structural properties were analyzed. Interestingly, physical, thermal and mechanical properties were enhanced with the increasing content of zinc oxide up to 8 mol%, due to the presence of more ionic nature of P–O–Zn bonds than P–O–P bonds in the glass network. The FTIR and Raman analysis revealed the evolution of the phosphate network with increasing zinc concentration and leads to progressive depolymerisation of the glass network. The obtained results from the physical and structural properties of these zinc added calcium phosphate glasses support their potential to use as bone implant applications.

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“…Sm 2 O 3 is thought to have a lower a nity for oxygen attraction than TeO 2 , which results in a larger interstitial site that is unoccupied(Mawlud, 2018). More addition of Sm 2 O 3 up to 2.5 mol%, results in a signi cant drop in molar volume to 25.89 m 3 /mol, this impact can be compensated by the fact when the Sm 3+ mol friction concentration increased, the structure of glasses will become more compacted(Yusoff and Sahar, 2016) Ahmed et al 2016, Yusof et al, 2015…”

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confidence: 99%

Spectroscopic and Surface Wetting Properties of Samarium Doped Lead-Tellurite Glass Embedded with Titanium Nanoparticles: Self-Cleaning Glass

Hamad,

Mawlud

2023

Plasmonics

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Two series of samarium doped lead-tellurite glass embedded with titanium nanoparticles (Ti NPs) of different compositions (60-x) TeO 2 -30PbO-10ZnO-xSm 2 O 3 (x = 0.5, 1, 1.5, 2, 2.5 mol%) and (58.5-x) TeO 2 -30PbO-10ZnO-1.5Sm 2 O 3 -xTiO 2 (x = 0.3, 0.6, 0.9, 1.2, 1.5mol %) were prepared using conventional melt quenching technique. The existence of a broad hump XRD pattern veri es the amorphous nature of glasses. The homogeneous distribution and growth of spherical and non-spherical Ti NPs (average diameter ~11.11±0.13 nm) in the glassy matrix are evidenced from the TEM analyses. The HRTEM con rmed the presence of Ti NPs by measuring the lattice spacing of Ti NPs, which is found to be 0.211nm. The UV-Vis-NIR absorption spectra reveal nine bands corresponding to the transition from ground state 6 H 5/2 to excited states 4 I 13/2, 4 I 11/2 , 6 F 11/2 , 6 F 9/2 , 6 F 7/2 , 6 F 5/2 , 6 F 3/2 , 6 H 15/2 , and 6 F 1 /2 , the most intense hypersensitive bands are F 9/2 , 6 F 7/2 , 6 F 5/2 and 6 F 3/2 . The down conversion corresponding to Sm 3+ ions transitions under 404 nm excitation reveals four emission bands centered at 548nm, 583nm, 628nm, and 692 nm related to the transitions

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Thermal analyses, spectral characterization and structural interpretation of Nd3+/Er3+ ions co-doped TeO2-ZnCl2 glasses system

Cited by 7 publications

References 22 publications

Spectroscopic Characteristics and Radiative Parameters of Er+3 Doped Ternary Lead Bismuth Tellurite Glass: Judd-Ofelt Analysis

Spectroscopic Characteristics and Radiative Parameters of Er+3 Doped Ternary Lead Bismuth Tellurite Glass: Judd-Ofelt Analysis

Investigations on Physico-Mechanical and Spectral Studies of Zn2+ Doped P2O5-Based Bioglass System

Spectroscopic and Surface Wetting Properties of Samarium Doped Lead-Tellurite Glass Embedded with Titanium Nanoparticles: Self-Cleaning Glass

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