Effect of heavy metal oxides on photoluminescence and spectroscopic attributes of Eu3+ activated borate glasses

Ramesh, P.; Jagannath, G.; Sathish, Kota; Pramod, A.G.; Hegde, Vinod; Pasha, U. Mahaboob; Khan, Sultan; Annapurna, K.; Sayyed, M.I.; Alhuthali, Abdullah; Агарков, Д. А.; Kokila, M.K.

doi:10.1016/j.optmat.2021.110933

Cited by 25 publications

(4 citation statements)

References 57 publications

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“…High-temperature Raman spectroscopy allows obtaining additional information on the microstructure of samples both at room and operating temperature, where most other investigation methods become less applicable. Previously it was used to study the structure of single-crystal samples of anionic conductors (47)(48), sealing glasses (49)(50) for SOFCs, as well as optical glasses (51)(52)(53) including in situ experiments at the operating temperature of SOFCs (46).…”

Section: Studies Of Sofc Anode Fabrication Materialsmentioning

confidence: 99%

Application of High-Temperature Raman Spectroscopy (RS) for Studies of Electrochemical Processes in Solid Oxide Fuel Cells (SOFCs) and Functional Properties of their Components

et al. 2021

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Combined technique and setup have been created that combines capabilities of electrochemical methods, as well as high-temperature Raman spectroscopy (RS) at Osipyan Institute of Solid State Physics RAS. In order to study the processes in the electrochemically active zone, a special geometry of samples was developed on basis of optically transparent single crystal membranes of an anionic conductor with a toroidal shape counter-electrode. With the use of this combined technique and special geometry, studies of the kinetics of reduction of nickel in composite SOFC anodes were carried out. The influence of the composition of fuel on Raman spectra obtained from the internal interface in the current load mode was also investigated, and the correlations with the cell voltage were studied. RS is also used to study the structure of single-crystal samples of anionic conductors, including at SOFCs operating temperature. The new combined technique was used to study other components: sealing glasses for SOFCs and optical glasses.

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Section: Studies Of Sofc Anode Fabrication Materialsmentioning

confidence: 99%

Application of High-Temperature Raman Spectroscopy (RS) for Studies of Electrochemical Processes in Solid Oxide Fuel Cells (SOFCs) and Functional Properties of their Components

et al. 2021

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“…Rare earth (RE)-doped phosphor materials today find immense usage in various imaging and optoelectronic applications like white-lightemitting diodes (w-LEDs), solid-state lighting (SSL), solar cells, display devices, cathode ray tubes, lasers, and scintillators. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] Although RE materials give sharp luminescence, the w-LEDs built on such phosphor-based platforms have major disadvantages like a low color rendering index (CRI) and excessively correlated color temperatures (CCT > 4500 K). 7,[20][21][22] Near ultraviolet (UV) LED chips integrated with RGB phosphors have been used to construct w-LEDs.…”

Section: Introductionmentioning

confidence: 99%

Structural and luminescence studies on thermally stable Bi³⁺‐activated Ba₃MoTiO₈ phosphors for near UV‐pumped w‐LED applications

Rohilla,

Prasad,

Srinivasa Rao

2023

Int J Applied Ceramic Tech

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This research presents the outcomes of diverse morphological and photoluminescence (PL) studies performed on Bi3+ ion–doped Ba3MoTiO8 phosphors prepared via the conventional solid‐state reaction method. Phase assessment was carried out via the X‐ray diffraction (XRD) studies. Field emission scanning microscopy (FE‐SEM) and energy‐dispersive X‐ray analysis (EDAX) have been used to study the surface morphology anda elemental composition. Fourier transform infrared spectroscopy (FT‐IR) was used to study the character and vibrational frequencies of bonds in the phosphor lattice. Room‐temperature PL was performed under 275 and 386 nm excitations, displaying a broad band in the blue region corresponding to the 3P1 → 1S0 transition of Bi3+ ions. The Commission Internationale de L'Eclairage coordinates and correlated color temperature values show that the as‐prepared phosphors emit in the blue vicinity. The decay curves under both excitation wavelengths show a single exponential behavior. Temperature‐dependent PL studies confirmed the high thermal stability of the phosphor. We want to endorse these phosphors as a blue‐emitting component in white light‐emitting diodes (w‐LEDs) and solid‐state lighting (SSL) applications.

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“…However, each glass manufacturing process necessitates developing a unique set of characterization methods, based on experimental and modeling approaches, to ensure that the results are understandable and acceptable for the purposes for which they are designed. Among the different types of glasses, heavy metal oxide glasses (HMO) have received a lot of interest lately because of their low phonon characteristics [ 1 , 2 ]. Glasses with more than 50% mol percent of a heavy metal cation are heavy metal oxide glasses.…”

Section: Introductionmentioning

confidence: 99%

Novel HMO-Glasses with Sb2O3 and TeO2 for Nuclear Radiation Shielding Purposes: A Comparative Analysis with Traditional and Novel Shields

et al. 2021

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The radiation shielding characteristics of samples from two TeO2 and Sb2O3-based basic glass groups were investigated in this research. TeO2 and Sb2O3-based glasses were determined in the research as six samples with a composition of 10WO3-(x)MoO3-(90 − x)(TeO2/Sb2O3) (x = 10, 20, 30). A general purpose MCNPX Monte Carlo code and Phy-X/PSD platform were used to estimate the radiation shielding characteristics. Accordingly, the linear and mass attenuation coefficients, half value layer, mean free path, variation of the effective atomic number with photon energy, exposure and built-up energy factors, and effective removal cross-section values were determined. It was determined that the results that were produced using the two different techniques were consistent. Based on the collected data, the most remarkable findings were found to be associated with the sample classified as T80 (10WO3 + 10MoO3 + 80TeO2). The current study showed that material density was as equally important as composition in modifying radiation shielding characteristics. With the T80 sample with the greatest density (5.61 g/cm3) achieving the best results. Additionally, the acquired findings were compared to the radiation shielding characteristics of various glass and concrete materials. Increasing the quantity of MoO3 additive, a known heavy metal oxide, in these TeO2 and Sb2O3-based glasses may have a detrimental impact on the change in radiation shielding characteristics.

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Effect of heavy metal oxides on photoluminescence and spectroscopic attributes of Eu3+ activated borate glasses

Cited by 25 publications

References 57 publications

Application of High-Temperature Raman Spectroscopy (RS) for Studies of Electrochemical Processes in Solid Oxide Fuel Cells (SOFCs) and Functional Properties of their Components

Application of High-Temperature Raman Spectroscopy (RS) for Studies of Electrochemical Processes in Solid Oxide Fuel Cells (SOFCs) and Functional Properties of their Components

Structural and luminescence studies on thermally stable Bi³⁺‐activated Ba₃MoTiO₈ phosphors for near UV‐pumped w‐LED applications

Novel HMO-Glasses with Sb2O3 and TeO2 for Nuclear Radiation Shielding Purposes: A Comparative Analysis with Traditional and Novel Shields

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Effect of heavy metal oxides on photoluminescence and spectroscopic attributes of Eu3+ activated borate glasses

Cited by 25 publications

References 57 publications

Application of High-Temperature Raman Spectroscopy (RS) for Studies of Electrochemical Processes in Solid Oxide Fuel Cells (SOFCs) and Functional Properties of their Components

Application of High-Temperature Raman Spectroscopy (RS) for Studies of Electrochemical Processes in Solid Oxide Fuel Cells (SOFCs) and Functional Properties of their Components

Structural and luminescence studies on thermally stable Bi3+‐activated Ba3MoTiO8 phosphors for near UV‐pumped w‐LED applications

Novel HMO-Glasses with Sb2O3 and TeO2 for Nuclear Radiation Shielding Purposes: A Comparative Analysis with Traditional and Novel Shields

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Structural and luminescence studies on thermally stable Bi³⁺‐activated Ba₃MoTiO₈ phosphors for near UV‐pumped w‐LED applications