Luminescence emission features of Nd 3+ ions in PbO–Sb 2 O 3 glasses mixed with Sc 2 O 3 /Y 2 O 3 /HfO 2

Rao, K. S. R. Koteswara; Zhydachevskii, Ya.; Suchocki, A.; Piasecki, M.; Gandhi, Y.; Kumar, V. Ravi; Veeraiah, N.

doi:10.1016/j.optmat.2017.04.025

Cited by 26 publications

(6 citation statements)

References 48 publications

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“…The emission spectra display the typical Nd 3+4 F 3/2 → 4 I 9/2 , 4 I 11/2 , 4 I 13/2 NIR transitions ,,,, observed around 890, 1056, and 1330 nm, respectively. While the 4 F 3/2 → 4 I 9/2 , 4 I 11/2 emissions around 0.9 and 1.06 μm have been attractive for solar spectral conversion and lasing, ,,, the 4 F 3/2 → 4 I 11/2 , 4 I 13/2 around 1.06 and 1.33 μm have been also considered interesting for telecommunications and medical applications . The evolution of the PL intensities is not like the absorption which increased linearly with Nd 2 O 3 content.…”

Section: Resultsmentioning

confidence: 99%

Holistic Assessment of NIR-Emitting Nd³⁺-Activated Phosphate Glasses: A Structure–Property Relationship Study

Jiménez

2024

ACS Org. Inorg. Au

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Near-infrared (NIR)-emitting phosphate glasses containing Nd 3+ ions are attractive for applications in laser materials and solar spectral converters. The composition− structure−property relation in this type of glass system is thus of interest from fundamental and applied perspectives. In this work, Nd 3+ -containing glasses were made by melting with 50P 2 O 5 -(50 − x)BaO-xNd 2 O 3 (x = 0, 0.5, 1.0, 2.0, 3.0, 4.0 mol %) nominal compositions and studied comprehensively by density and related physical properties, X-ray diffraction (XRD), Raman spectroscopy, O 1s X-ray photoelectron spectroscopy (XPS), differential scanning calorimetry (DSC), dilatometry, ultraviolet−visible (UV−vis)−NIR optical absorption, and photoluminescence (PL) spectroscopy with decay dynamics assessment. The densities and molar volumes of the Nd 3+ -containing glasses generally increased with Nd 2 O 3 concentration also resulting in shorter Nd 3+ −Nd 3+ distances. XRD supported the amorphous nature of the glasses, whereas the Raman spectra evolution was indicative of glass depolymerization being induced by Nd 3+ ions. Oxygen (1s) and phosphorus (2p) analysis by XPS for the glass with 4.0 mol % Nd 2 O 3 agreed with the increase in nonbridging oxygens relative to the undoped host. DSC results showed that the glass transition temperatures increased with Nd 3+ concentration, with the glasses also displaying a decreased tendency toward crystallization. Dilatometry showed trends of increasing softening temperatures and decreasing thermal expansion coefficients with increasing Nd 2 O 3 content. A glass strengthening/tightening effect was then indicated to be induced by Nd 3+ with higher field strength compared to Ba 2+ ions. The UV−vis−NIR absorption by Nd 3+ ions increased consistently with Nd 3+ concentration. The UV−vis absorption edges of the Nd-containing glasses were also analyzed via Tauc and Urbach plots for comparison with the undoped host. Concerning the PL behavior, the Nd 3+ NIR emission intensity was highest for 1.0 mol % Nd 2 O 3 and decreased thereafter. The decay kinetics of the 4 F 3/2 emitting state in Nd 3+ ions analyzed revealed decreasing lifetimes where the decay rate analysis pointed to the prevalence of ion−ion excitation migration leading to PL quenching at high Nd 3+ concentrations.

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Section: Resultsmentioning

confidence: 99%

Holistic Assessment of NIR-Emitting Nd³⁺-Activated Phosphate Glasses: A Structure–Property Relationship Study

Jiménez

2024

ACS Org. Inorg. Au

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“…It is believed that the vibration of B–O bonds stretching of the [BO 4 ] units appears between 800 and 1200 cm –1 , which can correspond to the peak at 980 cm –1 in Figure ; and the peaks at 1200–1600 cm –1 belong to the asymmetric stretching relaxation of the B–O bands of triangles [BO 3 ] units, which can correspond to the peak at 1210 and 1420 cm –1 in Figure . The peak at 1210 cm –1 is the characteristic peak of B 3 O 6 . − Also, the peaks at 520 and 710 cm –1 are the deformation modes of the glass network, and in particular, the peak at 710 cm –1 belongs to the bond-bending motion of B–O–B groups.…”

Section: Resultsmentioning

confidence: 96%

“…According to the former study, the Verdet constant of Tb ion-doped MO glasses is directly proportional to the Tb 2 O 3 content. 20 Also, the external factors such as temperature 21 and incident wavelength 22 both have great influence, which we cannot ignore on the Faraday effect of MO materials. This chapter focuses on the effect of the internal structure of the matrix glassin particular, the type of boron groupson the Faraday effect of MO glasses.…”

Section: Resultsmentioning

confidence: 99%

Effect of B₂O₃ Content and Microstructure on Verdet Constant of Tb₂O₃-Doped GBSG Magneto-Optical Glass

et al. 2018

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Rare-earth-oxide Tb2O3-doped Ga2O3–B2O3–SiO2–GeO2 (GBSG) glasses with different B2O3 concentrations were prepared and studied. The Verdet constant of the GBSG glasses was measured, and it was found that the Verdet constant increased greatly when the content of Tb4O7 is fixed but the B2O3 concentration increases. The X-ray photoelectron spectrometry and electronic paramagnetic resonance spectrums show that the ratio Tb3+/Tb4+ increases with the increase of B2O3. The self-reduction of Tb4+ occurred. According to the Fourier transform infrared and MAS-NMR spectrums, when the B2O3 concentration increased, the depolymerization of the boron groups occurred. The [BO4]-based high polymeric network decomposed into the lower ones containing [BO3], which caused the reduction in which the diamagnetic Tb4+ gradually reduces to the paramagnetic Tb3+. This is the basic reason why the Verdet constant increases with the B2O3 concentration. Finally, the schematic illustration of the position of Tb ions and the electron transfer between Tb ions and the surrounding negative boron units were discussed.

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“…The nonconventional antimony oxide glass exhibits exceptional values of density, refractive index, and dielectric constant [1,2]. Moreover, these glass exhibit transparency across a wide wavelength region, extending from ultraviolet to infrared.…”

Section: Introductionmentioning

confidence: 99%

Luminescence features of Ho³⁺, Er³⁺ and Tm³⁺ ions in red lead added non‐conventional antimony oxide glass system

Rao,

Sekhar,

Kumar

et al. 2023

Luminescence

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In this study, a glass system based on heavy metal oxides, namely Pb3O4‐Sb2O3‐SiO2, was prepared with Ho2O3, Er2O3, and Tm2O3 as dopants. The prepared glasses were characterized using XRD and IR studies. The luminescence efficiencies of the three rare earth ions viz., Ho3+, Er3+, and Tm3+ in the glass system were investigated, specifically focusing on green (Ho3+, Er3+), blue (Tm3+), and near‐infrared (NIR) emissions. The optical absorption (OA) and photoluminescence (PL) spectra of RE mixed glasses displayed strong bands in the visible and NIR regions, which were analyzed using J‐O theory. The J‐O coefficients (Ωλ) found to be in the order of Ω2 > Ω4 > Ω6 for all the three glasses. Notably, the Tm3+‐doped glasses exhibited the lowest Ω2 value, which was attributed to a larger degree of disorder in the glass network due to lower fractions of Sb5+ and Pb4+ ions that take part glass network forming. Such conclusion was arrived based on the IR studies. Furthermore, the quantitative analysis of PL spectra and decay curves indicated that SbHo and SbEr glasses are suitable for efficient green emission, while SbTm glass is a promising choice for blue laser emission.

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Luminescence emission features of Nd 3+ ions in PbO–Sb 2 O 3 glasses mixed with Sc 2 O 3 /Y 2 O 3 /HfO 2

Cited by 26 publications

References 48 publications

Holistic Assessment of NIR-Emitting Nd³⁺-Activated Phosphate Glasses: A Structure–Property Relationship Study

Holistic Assessment of NIR-Emitting Nd³⁺-Activated Phosphate Glasses: A Structure–Property Relationship Study

Effect of B₂O₃ Content and Microstructure on Verdet Constant of Tb₂O₃-Doped GBSG Magneto-Optical Glass

Luminescence features of Ho³⁺, Er³⁺ and Tm³⁺ ions in red lead added non‐conventional antimony oxide glass system

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Luminescence emission features of Nd 3+ ions in PbO–Sb 2 O 3 glasses mixed with Sc 2 O 3 /Y 2 O 3 /HfO 2

Cited by 26 publications

References 48 publications

Holistic Assessment of NIR-Emitting Nd3+-Activated Phosphate Glasses: A Structure–Property Relationship Study

Holistic Assessment of NIR-Emitting Nd3+-Activated Phosphate Glasses: A Structure–Property Relationship Study

Effect of B2O3 Content and Microstructure on Verdet Constant of Tb2O3-Doped GBSG Magneto-Optical Glass

Luminescence features of Ho3+, Er3+ and Tm3+ ions in red lead added non‐conventional antimony oxide glass system

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Holistic Assessment of NIR-Emitting Nd³⁺-Activated Phosphate Glasses: A Structure–Property Relationship Study

Holistic Assessment of NIR-Emitting Nd³⁺-Activated Phosphate Glasses: A Structure–Property Relationship Study

Effect of B₂O₃ Content and Microstructure on Verdet Constant of Tb₂O₃-Doped GBSG Magneto-Optical Glass

Luminescence features of Ho³⁺, Er³⁺ and Tm³⁺ ions in red lead added non‐conventional antimony oxide glass system