Er3+ ion doped low phonon energy glass as a white light emitter

Saeed, Aly; Abu-raia, W.; Farag, Mohammed

doi:10.21608/ejs.2021.90000.1017

Cited by 10 publications

(4 citation statements)

References 22 publications

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“…Hence, the located bands at 838 (11,933 cm −1 ), 908 (11,013 cm −1 ), and 1058 nm (9452 cm −1 ) are assigned to 2 2 , 2 2 , and 2 2 transitions respectively 73 – 75 . The others appeared bands in the ErCoCu3 glass at 314, 354, 384, 414, 492, 522, 548, 984, and 1540 & 1584 nm are assigned to the transition in Er 3+ ion from the ground state 4 I 15/2 to the excited states 2 D 3/2 , 2 K 15/2 , 4 G 11/2 , 4 F 3/2 , 4 F 7/2 , 2 H 11/2 , 4 S 3/2 , 4 I 11/2 , and 4 I 13/2 respectively 58 , 59 , 76 , 77 . In the ErCoCu4, ErCoCu5, and ErCoCu6 glasses, which contain a mixture of Co and Cu ions, the same broadbands are formed as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

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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Section: Resultsmentioning

confidence: 99%

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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“…12 18 , 31 . While the Urbach energy results were calculated through the slope reciprocal resulting from the relationship between the absorption coefficient logarithm and the photon energy 32 – 35 . The observed reduction in the optical band gap with the rise in the concentration of the Ni ions attributed to the creation of a great number of donor centers; consequently, the excited states of localized electrons originally trapped on Ni 2+ positions initiate to overlap with the unfilled 3d states on the neighboring impurity sites.…”

Section: Resultsmentioning

confidence: 99%

Ni ions doped oxyflourophosphate glass as a triple ultraviolet–visible–near infrared broad bandpass optical filter

Abu-raia¹,

Aloraini

El-Khateeb³

et al. 2022

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Research and development R&D about new materials that can be used as an optical filter, shortpass, bandpass, and longpass is still ongoing. So, in this context, the 50P2O5–20ZnF2–15MgF2–15PbF2 doped different concentrations of NiO ranging from 0 up to 4 mol% as a bandpass filter was prepared using the conventional melt annealing method. The formation of the amorphous essence was observed in the X-ray diffraction patterns. The role of Ni ions in the produced glass network was studied by density and Fourier Transform Infrared FTIR spectroscopy results, which showed that the Ni ions play a network modifier role. Thermal analysis results showed high thermal stability for the produced glasses. Electron paramagnetic resonance EPR spectra results clarified that the Ni3+ ions occupy an elongated octahedral $$\left( {g_{ \bot } > g_{\parallel } \approx 2} \right)$$ g ⊥ > g ‖ ≈ 2 . The measurements of AC conductivity, dielectric constant, and electric modulus were studied at different temperatures and frequencies. The ionic conduction dominates the conductivity at high temperatures, while the electronic dominates at low temperatures. The appearance of Ni3+ (confirmed by ESR) and Ni2+ were observed in the optical absorption spectra, also it was found that both of them occupy both tetrahedral and octahedral sites. Three distinguished bands in the UV (centered at 354 nm), visible (centered at 620 nm), and NIR (centered at 1074 nm) regions appeared in the optical transmittance spectra, indicating the defining characteristic of the bandpass filter.

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“…The glass heat treatment temperature that was chosen according to a previous published paper contains a similar phosphate glass composition prepared at the same conditions in our lab. T g was found to be around 360 °C while T c of such glasses was found to be around 480 °C [21]. In this work, the samples were poured around T g and cooled at a slow rate of cooling, which allowed the crystalline phase to be formed.…”

Section: Methodsmentioning

confidence: 93%

Enhancement of structural and optical properties of transparent sodium zinc phosphate glass–ceramics nano composite

et al. 2022

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Transparent sodium phosphate glass–ceramics system according to the composition (55-x) P2O5.(30 + x)ZnO.15Na2O where x = 0, 2.5, 5, 7.5, and 10 was prepared with the melt quenching technique. Different techniques such as XRD and infrared spectroscopy (FTIR) were used to investigate the structure of the studied glass samples and glass–ceramics nano composite. XRD revealed the formation of crystalline phase. The crystalline phase of Na2Zn (P2O7) and Na2ZnP2O7.Zn2P2O7 has been detected which varies according to the ZnO concentration. The density increased whereas molar volume decreased as ZnO content was increased. Optical band gap values, direct and indirect, decreased with increasing ZnO content revealing that bridging oxygen linkage Zn–O-P present in the glass network. The band gaps were found to be ranging between 3.42 and 3.13 eV for indirect transition and ranging between 4.34 and 4.20 eV for direct transitions. It was concluded that the samples have a strong tendency to be crystallized with increasing ZnO content in the sample. This crystallization behavior with increasing the ZnO content affected the structure and optical properties of the prepared samples. In this work, a low cost, wide band gap transparent ceramic with wide range of transparency was prepared and investigated. Such glass–ceramic system is suitable for doping with rare-earth element and/or transition metals for laser and optical devices.

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Er3+ ion doped low phonon energy glass as a white light emitter

Cited by 10 publications

References 22 publications

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

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

Ni ions doped oxyflourophosphate glass as a triple ultraviolet–visible–near infrared broad bandpass optical filter

Enhancement of structural and optical properties of transparent sodium zinc phosphate glass–ceramics nano composite

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