The effect of cobalt/copper ions on the structural, thermal, optical, and emission properties of erbium zinc lead borate glasses

Abstract

A host glass network of 70B2O3–10Pb3O4–18ZnO–2Er2O3 (ErCoCu1) was proposed and the impact of 1 mol% of Co or/and Cu ions on its structural, thermal, optical, and green emission properties was studied extensively. The X-ray diffraction spectra confirmed the amorphous structure of the produced glasses. Density and density-based parameters behavior showed that the Co or/and Cu ions fill the interstitial positions of the proposed ErCoCu1 network, causing its compactness. Both ATR-FTIR and Raman Spectra affirmed the formation of the fundamental structural units of the borate network, B–O–B linkage, BO3, and BO4. Additionally, the penetration of Co or/and Cu ions inside the ErCoCu1 converts the tetrahedral BO4 units to triangle BO3 causing its richness by non-bridging oxygens. The addition of Co or/and Cu reduces the glass transition temperature as a result of the conversion of the BO4 to BO3 units. Optical absorption spectra for the host glass ErCoCu1 showed many of the distinguished absorption bands of the Er3+ ion. Penetration of Co ion generates two broadbands referring to the presence of Co2+ ions in both tetrahedral and octahedral coordination and Co3+ ions in the tetrahedral coordination. In the Cu-doped glasses, the characteristic absorption bands of Cu2+ and Cu+ were observed. A green emission was generated from the ErCoCu1 glass under 380 nm excitation wavelength. Moreover, no significant effect of Co or/and Cu on the emission spectra was recorded. The considered glasses had appropriate properties qualifying them for optoelectronics and nonlinear optics applications.

Study of Conduction Mechanisms in Alkali and Transition Metal Oxides Doped Borosilicate Glasses

“…Xylene (= 0.865 g/cm 3 ) was used as an immersion liquid. Density was estimated using the expression (11) , D = W W −W L XD L Where, W is the weight of the sample in air, W L weight of the sample in liquid and D L the density of a buoyant liquid. For dc conductivity measurement, the samples of thickness 3 to 4 mm and cross-sectional areas in the range 46 mm 2 -61.5 mm 2 sizes were selected.…”

Deciphering the structure and potassium-ion transport mechanism of potassium borate glass

“…Potassium borate glass is widely used as a glass-forming agent, [1][2][3][4][5] which can be utilized to design and prepare new materials with potential applications in optics, electrochemistry, radiation shielding, etc. Alkali metal borate glass exhibits excellent nonlinear optical properties, 6 and the borate groups composed of B-O-B bonds contribute to enhancing the optical characteristics of glasses.…”