Studies of structural and optical properties of tungsten tellurite glasses

Kumari, Hemlata; Patel, Kuldeep; Dhiman, S. K.; Mahajan, S. K.; Ansari, Ghizal F.

doi:10.1016/j.matpr.2022.03.027

Cited by 7 publications

(4 citation statements)

References 19 publications

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“…Table1 lists the additional physical characteristics, such as the molar volume Vm, polaron radius Rp, oxygen packing density (OPD), intermolecular distance Ri, and others that were computed [12][13].…”

Section: Fig1 Plot Between Density and Pbo Concentrationmentioning

confidence: 99%

“…The refractive index n determines the optical energy gap, and the optical energy gap Eg was examined using the equation [12][13].…”

Section: Refractive Index and Molar Refractivitymentioning

confidence: 99%

“…The tellurite network is continuously transformed as alkali, alkaline-earth, heavy metal and rare-earth ions are added to glasses, and the Te2O coordinating number drops [10,11]. The capacity of tellurite materials to make glass depends on the metal oxide concentration [12][13]. Because of their disordered structure, glasses are isotropic substances, dissimilar to crystals, and do not typically exhibit double refraction.…”

Section: Introductionmentioning

confidence: 99%

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Physical and Optical Properties of Lead-Tungsten-Tellurite Glasses

Ansari,

Patidar,

Pandey

et al. 2023

MSF

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By using the melt quenching approach, a number of tellurite-based heavy metal oxide glasses codoped with varied lead oxide (PbO), (80-x)TeO2-20%WO3-xPbO (x = 5, 10, 15 and 20 mol%) compositions, have been created. By using UV-Vis-IR spectroscopy, forbidden energy gap, Urbach energy, and refractive index were calculated and the contribution of PbO to the glasses structure was investigated. Calculations were also made for physical parameters such as density, molar mass, and oxygen packing density, polaron radius, inter-ionic distance, and molar refraction. The direct and indirect optical band gaps is 3.29 to 3.33 eV and 3.2 to 3.3 eV, respectively. The fact that the nonbridging oxygen ion content rises with increasing PbO content and shifts the band edge to lower frequencies, may be the cause of a drop in the values of the energy band gap Eg.

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Section: Fig1 Plot Between Density and Pbo Concentrationmentioning

confidence: 99%

“…The refractive index n determines the optical energy gap, and the optical energy gap Eg was examined using the equation [12][13].…”

Section: Refractive Index and Molar Refractivitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Physical and Optical Properties of Lead-Tungsten-Tellurite Glasses

Ansari,

Patidar,

Pandey

et al. 2023

MSF

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“…The thermal sensing properties of several tellurite glasses synthesized with various modifiers, such as tungsten, 27 ZnO/Nb 2 O 5 , 28 M 2 O, 29 and GeO 2 , 30 containing Er 3+ and Er 3+/ Yb 3+ ions, have been reported; however, no report on the thermal sensing behavior of Er 3+ and Er 3+ /Yb 3+ doped zinc borotellurite glasses has been uncovered. The temperature dependency of the UC spectra of the emissions from the 2 H 11/2 and 4 S 3/2 states of Er 3+ ions positioned at typically 525 and 545 nm has been analyzed between 304 K and 443 K under 975 nm laser excitation.…”

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Color Tuning and Optical Temperature Sensing Properties of Upconversion Emission in Yb³⁺/Er³⁺/Tm³⁺Doped Boro-Zinctellurite Glasses

Eryürek

Tabanli

Buhari

et al. 2023

ECS J. Solid State Sci. Technol.

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Zinc borotellurite (B2O3/BaO/ZnO/TeO2) glasses co-doped with Tm3+/Yb3+, Er3+/Yb3+ and tri-doped Tm3+/Er3+/Yb3+ were prepared using the traditional melt quenching method. Optical absorption spectra were measured in the wavelength range of 350-1100 nm at room temperature. The optical bandgap (Eg) and Urbach energy were calculated from Tauc’s plot. Blue and green emissions that can be seen by the naked eye were generated under 975 nm laser light excitation in doped Tm3+/Yb3+ and Er3+/Yb3+ doped glasses. Shifts in both blue and green color coordinates were seen as the excitation power density increased from 0.5 to 15.1 W/cm2. A white light generation was generated in glass doped with Tm3+/Er3+/Yb3+ ions, although a noticeable shift was not observed in both blue and green color coordinates for the same excitation power density range. Temperature sensing properties were investigated using the fluorescence intensity ratio of upconversion green emissions from the two thermally coupled 2H11/2 and 4S3/2 levels of Er3+ ions between 304 K and 443 K. The maximum sensitivity of the glasses doped with Er3+ and Er3+/Yb3+ were found to be 7.2x10-3 K-1 and 1.2x10-2 K-1 at 429 K, respectively. 

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Tailoring near-infrared luminescence with Er3+/Tm3+/Yb3+ tri-doped tellurite glasses for applications in the C, L and U bands

Pinto,

Rivera,

Falci

et al. 2024

Journal of Luminescence

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Studies of structural and optical properties of tungsten tellurite glasses

Cited by 7 publications

References 19 publications

Physical and Optical Properties of Lead-Tungsten-Tellurite Glasses

Physical and Optical Properties of Lead-Tungsten-Tellurite Glasses

Color Tuning and Optical Temperature Sensing Properties of Upconversion Emission in Yb³⁺/Er³⁺/Tm³⁺Doped Boro-Zinctellurite Glasses

Tailoring near-infrared luminescence with Er3+/Tm3+/Yb3+ tri-doped tellurite glasses for applications in the C, L and U bands

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Studies of structural and optical properties of tungsten tellurite glasses

Cited by 7 publications

References 19 publications

Physical and Optical Properties of Lead-Tungsten-Tellurite Glasses

Physical and Optical Properties of Lead-Tungsten-Tellurite Glasses

Color Tuning and Optical Temperature Sensing Properties of Upconversion Emission in Yb3+/Er3+/Tm3+Doped Boro-Zinctellurite Glasses

Tailoring near-infrared luminescence with Er3+/Tm3+/Yb3+ tri-doped tellurite glasses for applications in the C, L and U bands

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Color Tuning and Optical Temperature Sensing Properties of Upconversion Emission in Yb³⁺/Er³⁺/Tm³⁺Doped Boro-Zinctellurite Glasses