Tuning of smart cobalt doped borate glasses by electron beam as band-pass filters

Sallam, O.I.; Abdel-Galil, A.; Moussa, N.L.

doi:10.1016/j.optlastec.2023.109262

Cited by 6 publications

(3 citation statements)

References 36 publications

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“…Based on the optical absorption spectra, the optical band gap of the considered glasses was deduced according to Mott-Davis theory using the following equation 9 , 10 , 14 , 24 . where , , , are the absorption coefficient, the incident photon energy, the band tailing parameter, and the optical band gap energy respectively.…”

Section: Experimental and Theoretical Aspectsmentioning

confidence: 99%

“…To measure the disorder degree in the considered glasses, the band tail, which known as Urbach energy was estimated through the following equation 9 , 10 , 14 , 24 . where β is a constant.…”

Section: Experimental and Theoretical Aspectsmentioning

confidence: 99%

“…The formation of the mixed valence states of cobalt ions (Co 2+ /Co 3+ ) in octahedral (oh) and tetrahedral (Td) geometric forms inside the glass network makes it a favorable material in solar selective absorbers, fuel cells, visible and NIR-lasing materials, supercapacitors, gas sensors, and lithium-ion batteries. Cobalt imparts a blue or pink color to the glass depending on the Co 2+ ion geometrical shape coordination (tetrahedral or octahedral) 14 – 16 . Adding Cu ions to glasses networks generates two valence states, Cu + and Cu 2+ , during the preparation process under normal conditions.…”

Section: Introductionmentioning

confidence: 99%

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

Taha

Saeed

2023

Sci Rep

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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.

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