Optical and EPR studies of zinc phosphate glasses containing Mn2+ ions

Franco, Douglas F.; Manzani, Danilo; Carvajal, Eduar; Prando, Gabriela Augusta; Donoso, José Pedro; Magon, Cláudio José; Antônio, Selma Gutierrez; Gobato, Y. Galvão; Nalin, Marcelo

doi:10.1007/s10853-020-04725-0

Cited by 18 publications

(13 citation statements)

References 56 publications

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“…Moreover, all the emission peaks in the glasses are gradually red‐shifted with increasing Mn 2+ concentrations. This trend in general is in keeping with Mn 2+ ‐doped zinc phosphate glasses with silicon as reducation 45 . With increasing the Mn 2+ content, the distance of Mn 2+ ‐Mn 2+ is decreased, then the interaction of Mn 2+ ‐Mn 2+ and coordination field intensity surrounding Mn 2+ are enhanced.…”

Section: Resultssupporting

confidence: 65%

“…This trend in general is in keeping with Mn 2+ -doped zinc phosphate glasses with silicon as reducation. 45 With increasing the Mn 2+ content, the distance of Mn 2+ -Mn 2+ is decreased, then the interaction of Mn 2+ -Mn 2+ and coordination field intensity surrounding Mn 2+ are enhanced. It makes the excited state of Mn 2+ close to its ground d state, resulting in longer wavelength emission.…”

Section: Photoluminescence Characteristicsmentioning

confidence: 95%

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White‐light emission and red scintillation from Mn²⁺ ions single‐doped aluminum‐silicate glasses

Hua

Tang

Wei

et al. 2023

Int J of Appl Glass Sci

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A series of Mn2+ single‐doped 0.2Gd2O3‐0.2Al2O3‐0.6SiO2 (GAS: xMn2+) glasses with Si3N4 as reducing agent were prepared. The presence of [SiO4‐x] defects and Mn2+ ions was determined from the absorption and excitation spectra of the glasses. With the increase of Mn2+ concentration, the intensity of blue emission decreases, while the intensity of red emission increases. The color coordinate of GAS: 6Mn2+ glass is (0.264, 0.226). The lifetime of the glasses was tested. Under the monitoring of 440 nm, the fast components (τf) are between 17 and 85 μs, and the slow components (τs) are between 200–650 μs. The former belongs to [SiO4‐x] defects, and the latter is [4E(G), 4A1(G)]→6A1(S) transition of Mn2+ ions. Under the monitoring at 630 nm, the τf are between 110 and 300 μs, and the τs are between 680 and 1220 μs, which are due to 4T1(G)→6A1(S) transition of Mn2+ ions and Mn2+ pairs, respectively. The energy transfer mechanism of [SiO4‐x] defect→Mn2+ ions are explained. The efficient [SiO4‐x] defect →Mn2+ ions energy transfer process was demonstrated by time‐resolved photoluminescence, and the energy transfer efficiency is over 85%. The maximum photoluminescence quantum yield (PL QY) of the glasses can reach 15.87%. The thermal activation energy of the glasses was calculated. In addition, X‐ray excited red luminescence spectra and the mechanism of the glasses were investigated.

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Section: Resultssupporting

confidence: 65%

Section: Photoluminescence Characteristicsmentioning

confidence: 95%

White‐light emission and red scintillation from Mn²⁺ ions single‐doped aluminum‐silicate glasses

Hua

Tang

Wei

et al. 2023

Int J of Appl Glass Sci

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“…(50-x)PbO-50P2O5 with x reaches to 40 mol%. This compositional range appears wider compared to the compositions reported on the Al2O3 or ZnO phosphate glasses [13,14]. The phenomenon of mixed former effect (between CeO2 and P2O5) is considered as the main reason for obtaining amorphous glasses over wide composition range.…”

Section: Resultsmentioning

confidence: 82%

Improving structure and properties of lead phosphate glass through precipitation of few crystals from CeO2

et al. 2021

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New lead-cerium phosphate glasses in the system xCeO2(50-x)PbO-50P2O5 were successfully prepared by the meltquenching process. The amorphous and/or crystalline character of the as prepared compositions were confirmed by both X-ray powder diffraction (XRD) and electron diffraction patterns (EDP) related to transmission electron microscopy (TEM). The surface morphology and the analytical amounts of glasses constituents have been studied by scanning electron microscopy (SEM) equipped with Energy-dispersive X-ray spectroscopy (EDX) apparatus. It was found that P2O5 as a host network can dissolve extremely high concentration from CeO2 without crystallization of the host glass network. Some cerium phosphate (CeP2O7) clusters can be formed and precipitated in the main amorphous network. Formation of such type of clusters has an effective influence on enhancing material structure and properties, since the hardness number of the studied materials is highly enhanced. The chemical shift 31 P NMR of glasses is improved toward increasing shielding process by the effect of CeO2 addition.

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“…The EPR spectra of the Na 4 Mg(WO 4 ) 3 :Mn 2+ phosphor synthesized in a reducing atmosphere (red line) is also shown for comparison. As shown in Figure 4, one can clearly observe that both spectra exhibit a similar well-resolved six-line hyperfine structure, which is typically attributed to the interaction between the electron spin (S = 5/2) of Mn 2+ and 55Mn nuclear spin (I = 5/2) 21,22 The results of EPR analyses indicate that Mn 2+ ions indeed exist in a Na 4 Mg(WO 4 ) 3 host.…”

Section: The Luminescence Properties Of Mn 2+mentioning

confidence: 75%

Comment on “Bandshift Luminescence Thermometry Using Mn⁴⁺:Na₄Mg(WO₄)₃ Phosphors”

Xiao

Yan

2020

Chem. Mater.

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Optical and EPR studies of zinc phosphate glasses containing Mn2+ ions

Cited by 18 publications

References 56 publications

White‐light emission and red scintillation from Mn²⁺ ions single‐doped aluminum‐silicate glasses

White‐light emission and red scintillation from Mn²⁺ ions single‐doped aluminum‐silicate glasses

Improving structure and properties of lead phosphate glass through precipitation of few crystals from CeO2

Comment on “Bandshift Luminescence Thermometry Using Mn⁴⁺:Na₄Mg(WO₄)₃ Phosphors”

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Optical and EPR studies of zinc phosphate glasses containing Mn2+ ions

Cited by 18 publications

References 56 publications

White‐light emission and red scintillation from Mn2+ ions single‐doped aluminum‐silicate glasses

White‐light emission and red scintillation from Mn2+ ions single‐doped aluminum‐silicate glasses

Improving structure and properties of lead phosphate glass through precipitation of few crystals from CeO2

Comment on “Bandshift Luminescence Thermometry Using Mn4+:Na4Mg(WO4)3 Phosphors”

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Product

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White‐light emission and red scintillation from Mn²⁺ ions single‐doped aluminum‐silicate glasses

White‐light emission and red scintillation from Mn²⁺ ions single‐doped aluminum‐silicate glasses

Comment on “Bandshift Luminescence Thermometry Using Mn⁴⁺:Na₄Mg(WO₄)₃ Phosphors”