Optical studies on Tb3+: Dy3+ singly and doubly doped Borosilicate glasses for white light and solid state lighting applications

Bashar, Kh. A.; Fong, Wilkaan; Haider, Kh.A.; Baki, S.O.; Zaid, Mohd Hafiz Mohd; Mahdi, Mohd Adzir

doi:10.1016/j.jnoncrysol.2020.119943

Cited by 49 publications

(3 citation statements)

References 36 publications

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“…These findings suggest that the glasses doped with Dy 2 O 3 are able to emit yellowish-white light. The photoluminescence properties of the prepared glasses are comparable with the previous work [18,29,40,55,59].…”

Section: The Photoluminescence Analysissupporting

confidence: 87%

“…This particular transition, denoted as 4 F 9/2 → 6 H 13/2 and involving an electric dipole, is influenced by the coordination environment. The dependence of the transition at 482 nm ( 4 F 9/2 → 6 H 15/2 , magnetic dipole) on the coordination environment is comparatively lower than that of the electric dipole transition [18,54]. The PL spectra exhibit three distinct emission bands near-infrared (NIR) emissions at 850 nm, 980 nm, and 1150 nm, attributed to 4 F 9/2 → 6 F 5/2 , 4 F 9/2 → 6 F 7/2 , and 4 F 9/2 → 6 F 9/2 respectively [55,56].…”

Section: The Photoluminescence Analysismentioning

confidence: 82%

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Elucidating the impact of Dy₂O₃ substitution on structure, optical, photoluminescence and mechanical properties of borosilicate glass

Abouhaswa,

Abomostafa,

Nasr

et al. 2024

Phys. Scr.

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This work aims to investigate the changes in characteristics seen in the composition 60B2O3+ (30-x) BaO+10SiO2 +xDy2O3 where x is 0.0, 1.0, 2.0, and 3.0 mole% glass samples. Melt-quenching technique was used to prepare the glass samples. A variety of analytical techniques were employed to characterize the prepared glasses, such as X-ray, Raman, photoluminescence, and UV-Vis-NIR spectroscopy. XRD spectra verified the glassy nature. The glasses' compactness was studied using structural properties such as density, molar volume, and oxygen packing density. Glass absorption spectra showed eleven distinct peaks in the range 300–2000 nm, resulting from Dy3+ electronic transitions. Urbach energy, refractive index, and optical band gap energy were determined. The optical parameters, such as molar refraction, molar polarizability, reflection loss, optical transmission, metallization, and optical electronegativity, were estimated. The photoluminescence spectra revealed five distinct peaks in the 400–750 nm wavelength range under excitation at 325 nm. Makishima-Mackenzie's (M-M) method was used to determine mechanical parameters such as elastic moduli, Poisson's ratio, and hardness, and it was found that these properties decreased with increasing Dy2O3 concentration. 

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Section: The Photoluminescence Analysissupporting

confidence: 87%

Section: The Photoluminescence Analysismentioning

confidence: 82%

Elucidating the impact of Dy₂O₃ substitution on structure, optical, photoluminescence and mechanical properties of borosilicate glass

Abouhaswa,

Abomostafa,

Nasr

et al. 2024

Phys. Scr.

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“…Recently, borosilicate glasses attract the researcher's attention due to their properties and performance in various applications. Also, there is more interest in developing good radiation shielding materials against gamma rays and neutrons [1][2][3]. Currently, the concretes are using for protection from radiation as shielding materials were they are cost-effective, and their shapes and sizes are easily controllable [4].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Structural, Thermal Properties and Shielding Parameters of Borosilicate Glasses Doped with Dy3+/ Tb3+ Ions for Gamma and Neutron Radiation Shielding Applications

Abbas

Baki

Leng

et al. 2021

ARFMTS

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In this study, borosilicate host (H) and seven (S1-S7) samples are prepared by traditional melt-quenching technique. The samples are singly (S1, S2) and doubly (S3-S7) doped with deferent contents of Tb3+ and Dy3+ ions. All samples are analyzed and characterized by XRD (x-ray diffraction), ATR-FTIR (Attenuated total Reflectance-Fourier transform infrared) spectroscopy, TGA/DSC (Thermogravimetric analysis/Differential scanning calorimetry), and Raman spectroscopy. Moreover, the radiation shielding parameters of mentioned glasses such as mass attenuation (?/?), mean free path (MFP), and half-value layer (HVL) are evaluated within the energy of 0.015MeV-15MeV. These parameters are theoretically investigated and evaluated by using XCOM, WINXCOM, and Phy-X programs in addition to the other relevant equations. The ATR-FTIR measurement and Raman spectroscopy results confirmed the unit structure of BO3 and BO4 groups as the main compound as well as the Aluminum-oxide (Al-O-Al) and zinc-oxide (ZnO4) bonds. The transition (Tg), onset crystallization (Tx), crystallization (Tc) temperatures, and weight loss were identified from DSC and TGA findings, respectively. Also, the prepared glass shows good stability against crystallization, as reflected by (?T) variation. Furthermore, the radiation shielding parameter findings show good enhancement of the performance of the samples. However, upon these findings, one can say that these glasses could be used and utilized for radiation shielding purposes.

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The effect of SiO₂ crystallization in enhancing the luminescence of Dy³⁺‐Sm³⁺ co‐doped glass ceramics for cool white light application

Monisha,

Saravanan,

Mazumder

et al. 2024

Luminescence

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The present work investigates the structural and luminescence behaviour of Dy3+‐Sm3+ co‐doped glass ceramics obtained through heat treatment of precursor glasses. The growth of SiO2 polycrystalline particles and evolution of these crystallites in the glass domain are witnessed via XRD and FESEM study. The presence of network vibrational bands, hydroxyl groups and the increased quantity of bridging oxygens (BOs) in glass ceramics are analysed through FTIR spectroscopy study. The absorption study (UV–Visible–NIR) showed the possible electronic transitions of Dy3+ and Sm3+ ions. The red shift in the absorption band edges and the lower bandgap values are obtained as a result of improved heat treatment in glass ceramics. Emission studies show the enhanced luminescence intensity of glass ceramics under 350 and 402 nm excitations. Decay measurement of glass ceramics showed the improved lifetimes of Dy3+ and Sm3+ ions to have appeared in microseconds (×10−6 s). The colour characteristics of glass ceramics analysed using CIE colour chromaticity diagram and correlated colour temperature (CCT) values suggest the neutral to cool white light emissions. Therefore, prepared glass ceramics with SiO2 polycrystalline phase are considered to be suitable materials in cool white LEDs applications.

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Optical studies on Tb3+: Dy3+ singly and doubly doped Borosilicate glasses for white light and solid state lighting applications

Cited by 49 publications

References 36 publications

Elucidating the impact of Dy₂O₃ substitution on structure, optical, photoluminescence and mechanical properties of borosilicate glass

Elucidating the impact of Dy₂O₃ substitution on structure, optical, photoluminescence and mechanical properties of borosilicate glass

Investigation of Structural, Thermal Properties and Shielding Parameters of Borosilicate Glasses Doped with Dy3+/ Tb3+ Ions for Gamma and Neutron Radiation Shielding Applications

The effect of SiO₂ crystallization in enhancing the luminescence of Dy³⁺‐Sm³⁺ co‐doped glass ceramics for cool white light application

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Optical studies on Tb3+: Dy3+ singly and doubly doped Borosilicate glasses for white light and solid state lighting applications

Cited by 49 publications

References 36 publications

Elucidating the impact of Dy2O3 substitution on structure, optical, photoluminescence and mechanical properties of borosilicate glass

Elucidating the impact of Dy2O3 substitution on structure, optical, photoluminescence and mechanical properties of borosilicate glass

Investigation of Structural, Thermal Properties and Shielding Parameters of Borosilicate Glasses Doped with Dy3+/ Tb3+ Ions for Gamma and Neutron Radiation Shielding Applications

The effect of SiO2 crystallization in enhancing the luminescence of Dy3+‐Sm3+ co‐doped glass ceramics for cool white light application

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Product

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Elucidating the impact of Dy₂O₃ substitution on structure, optical, photoluminescence and mechanical properties of borosilicate glass

Elucidating the impact of Dy₂O₃ substitution on structure, optical, photoluminescence and mechanical properties of borosilicate glass

The effect of SiO₂ crystallization in enhancing the luminescence of Dy³⁺‐Sm³⁺ co‐doped glass ceramics for cool white light application