Structural, optical and thermal properties of Er3+-Ag codoped bio-silicate borotellurite glass

Hamza, A.M.; Halimah, M.K.; Muhammad, F.D.; Chan, K.T.; Usman, A.; Faznny, M.F.; Zaitizila, I.; Tafida, R.A.

doi:10.1016/j.rinp.2019.102457

Cited by 20 publications

(5 citation statements)

References 35 publications

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“…It disclosed a diffuse diffraction band in the 2θ range of 15 o − 45 o , suggesting there is no periodicity of long-range arrangement in the materials. The lack of long-range recurring order infers that the materials are in the glass phase [33]. Sharp peak location of XRD spectra enables crystal structure investigation by establishing the corresponding d values, thereby identifying the integrated metallic structure.…”

Section: Resultsmentioning

confidence: 99%

Spectroscopic evaluation of gold nanoparticles-imbued Dy 3+ -doped Li 2 CO 3 –SrO–ZnO– B 2 O 3 glasses: White solid-state lighting potential

Ahmad,

Yam,

Hashim

et al. 2024

Preprint

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This paper reports the white solid-state lighting potential of gold nanoparticles-imbued Dy3+-doped Li2CO3–SrO–ZnO–B2O3 glasses prepared using melt quenching. The produced materials undergo characterizations using various instrumentations to access the sensitivity of changing AuNP concentrations on their emission and colorimetric characteristics. XRD phase analysis established that the samples were glasses. TEM analysis shows AuNPs, whereas EDX spectroscopic analysis confirmed the inclusion of precursor elements into the glasses. The thermal stability, Hruby parameter, and glass-forming ability are 146 to 156 oC, 1.27 to 1.39, and 66-0.65, respectively. The optical absorption spectra of the glasses are consistent with Dy3+ transitions, while the surface plasmon resonance band fits the AuNPs characteristics band. The emission spectroscopic analysis reveals 1.52, 1.84, and 1.14 intensification for 6H15/2, 6H13/2, and 6H11/2 transitions. The Judd-Ofelt evaluation was made to support the experimental spectroscopic data. The CIE coordinates were traced to the cool white colour field with a purity of 15.64-7.79 % and CCT values of 5491-5437 K. The excellent thermal properties, enhanced emission, and improved colorimetric properties such as colour purity and natural daylight (cool) CCT values were due to the inclusion of AuNPs in the proposed glasses, which may be helpful in white solid-state lighting applications.

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Section: Resultsmentioning

confidence: 99%

Spectroscopic evaluation of gold nanoparticles-imbued Dy 3+ -doped Li 2 CO 3 –SrO–ZnO– B 2 O 3 glasses: White solid-state lighting potential

Ahmad,

Yam,

Hashim

et al. 2024

Preprint

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“…3 presents the XRD pattern of GO-deposited on zinc-tellurite glass. A broad diffuse or hump pattern was observed within 20°-40° in the 2θ scale without the existence of any sharp discrete diffraction peaks which indicates the presence of long-range structural disorder characteristics or lack of atomic orderliness in the glass network [21,22]. It can be seen from the figure that the absorption coefficient increases with an increase of Er 3+ concentration.…”

Section: X-ray Diffraction (Xrd) Analysismentioning

confidence: 90%

Polarizability of erbium-doped zinc-tellurite glasses coated with graphene oxide for telecommunication devices

Azlina¹,

Azlan²,

Shaari³

et al. 2021

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Graphene-based nanomaterials offer superior properties especially in optical performance. The existence of oxygen functionalized group in graphene active layers is beneficial to enhance the optical properties of current tellurite glass. In this work, two series of glasses denoted as ZBTEr (uncoated) and ZBTEr-GO (coated) were successfully prepared using melt-quenching and low-cost spray coating techniques. X-ray diffraction analysis was done on both glass series and confirmed the amorphous structural arrangement in the glass system. Morphological study was investigated by using Scanning Electron Microscopy (SEM) and revealed the distribution of graphene layers on the glass surface. The UV-Vis spectroscopy was carried out and several absorption bands were determined for both series of glasses. The computation of oxide ion polarizability and optical basicity were investigated based on Lorentz-Lorentz equation. The oxide ion polarizability and optical basicity for ZBTEr-GO (coated) glasses were found higher than ZBTEr (uncoated) glasses due to the existence of sp 2 graphitic attached on the oxygenic functional groups in GO layers. The metallization criterion values for ZBTEr-GO (coated) glasses were found decreased and tend to be more metallic. Hence, the deposition of graphene layers on the tellurite glasses offer a new strategy to improve the current telecommunication devices.

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“…The XRD pattern in Figure 3, displays broad diffusion at lower scattering angles in the range of 2θ = 20° to 40° revealing the absence of crystalline peaks. it depicts the existence of long-range structural disorder which is the characteristics of an amorphous material [17]. The sharpness of the hump is more pronounced at 2θ =30o.…”

Section: X-ray Diffraction Analysis (Xrd)mentioning

confidence: 93%

“…The decreasing values of Urbach energy is an indication that the samples have a higher tendency to minimize static disorder within its structure [17]. This has also indicated that as the concentration of Sm3+ ions increase, the Urbach energy as well as the fragility gets reduce as a result of decreasing amount of NBOs in the glass system.…”

Section: Urbach Energymentioning

confidence: 94%

Microporous Materials for Hydrogen Liquefiers and Storage Vessels

RA¹,

Thakur²

2022

J Mater Sci Manufac Res

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Using the traditional melt quenching method, a zinc tellurite glass system doped with Sm3+ ions and having the following composition: [(TeO2 )0.7 (ZnO) 0.3]1-x [Sm2 O3 ] x , where x = 0.01, 0.02, 0.03, 0.04, and 0.05 molar fraction was synthesized. The structural properties of a fabricated glass system were investigated using Fourier Transform Infrared (FTIR) and X-ray diffraction (XRD) analyses. The results obtained from XRD revealed the amorphous nature of e glass system. FTIR analysis shows the bonding parameters present in the prepared glass system. The physical parameters such as density and molar volume show opposite behaviour. The UV-VIS spectroscopy was employed in order to obtain the optical properties of glass system. The optical absorption spectra were recorded in the wavelength ranging from of 200 to 2000 nm. The optical energy band gap for both direct and indirect transitions are found to be increased on increasing the content of samarium oxide. Other useful optical parameters such as refractive index, molar refraction and Urbach energy are found to be decreased. The photo luminescent spectra displays four emission spectral bands at wavelengths 566, 604, 647 and 710 nm under the excitation wavelength of 404 nm. The recorded transitions correspond to 4 G5/2 → 6 H5/2, 6 H7/2, 6 H9/2 and 6 H11/2 transitions of samarium ions respectively. The observed luminescence spectra ascertain that the studied glasses have potential to serve as laser active medium.

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Structural, optical and thermal properties of Er3+-Ag codoped bio-silicate borotellurite glass

Cited by 20 publications

References 35 publications

Spectroscopic evaluation of gold nanoparticles-imbued Dy 3+ -doped Li 2 CO 3 –SrO–ZnO– B 2 O 3 glasses: White solid-state lighting potential

Spectroscopic evaluation of gold nanoparticles-imbued Dy 3+ -doped Li 2 CO 3 –SrO–ZnO– B 2 O 3 glasses: White solid-state lighting potential

Polarizability of erbium-doped zinc-tellurite glasses coated with graphene oxide for telecommunication devices

Microporous Materials for Hydrogen Liquefiers and Storage Vessels

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