Optical properties of zinc tellurite glasses doped with Cu2+ ions

Zamyatin, O. A.; Плотниченко, В. Г.; Чурбанов, М. Ф.; Zamyatina, E.V.; Karzanov, V. V.

doi:10.1016/j.jnoncrysol.2017.08.025

Cited by 32 publications

(10 citation statements)

References 89 publications

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“…Clearly, such a relationship following the Beer-Lambert law argues in favor of increasing amounts of Cu 2 + ions with increasing CuO contents in the glasses. [11,12,16,18] As shall be seen from our PL assessment, the extension of the Cu 2 + absorption band growing around 715 nm sets the basis for an efficient Eu 3 + !Cu 2 + energy transfer channel. On the other hand, a red shift in glass absorption edge is exhibited in Figure 3 with the increase in CuO contents in the 0.1-0.5CuEu glasses.…”

Section: Optical Absorption (Oa) Evaluationmentioning

confidence: 65%

“…Noticeably, the increase in CuO in the glasses results in the development of the broad absorption feature peaking around 715 nm due to d-d transitions in Cu 2 + (d 9 ) ions. [12,[15][16][17][18] The band is significantly red shifted compared to phosphate glasses where it has been observed around 850 nm, [12,18] and to some extent when compared to tellurite glass in the vicinity of 800 nm. [16] However, it is more typical of borate glasses that the Cu 2 + absorption band shows maxima below 800 nm in accord with an octahedral coordination supporting 2 E g !…”

Section: Optical Absorption (Oa) Evaluationmentioning

confidence: 94%

“…The decrease in optical band gap energies in glasses is frequently linked with the increase in non-bridging oxygen (NBO) terminals leading to decreasing chain lengths in the network. [15,16,20] Considering significant compositional changes, decreasing E opt values have been reported by Mahmoud [20] with increasing Bi 2 O 3 in glasses with compositions as…”

Section: Optical Absorption (Oa) Evaluationmentioning

confidence: 99%

“…It was argued by the author that the increase in Bi 2 O 3 concentration increases the bond length of the BO 3 structural units, and results in higher amounts of NBOs. [20] Zamyatin et al [16] similarly reported that in zinc tellurite glasses doped with Cu 2 + ions, the indirect band gap energies decreased considerably from 3.16 to 2.69 eV with increasing amounts of copper (II) up to 2400 ppm. The authors argued that the reduction of Cu 2 + to Cu + was suppressed by the occurrence of oxidizing agents in the batches such as the nitrates, and therefore the band gaps decreasing with Cu 2 + contents could be a result of an increase in NBOs and not Cu + .…”

Section: Optical Absorption (Oa) Evaluationmentioning

confidence: 99%

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Optical Spectroscopy and Excited‐State Dynamics of Eu³⁺‐Doped Bismuth Borate Glasses Containing CuO

Jiménez

Darley

2020

ChemPhysChem

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Bismuth borate glasses containing phosphors and luminescent rare‐earths are of interest for applications in light‐emitting devices. Herein, the influence of CuO impurities on red‐emitting Eu3+‐doped bismuth borate glasses of the 25Bi2O3‐15BaO‐10Li2O‐50B2O3 type was investigated by various spectroscopic methods. The glasses were prepared by the melt‐quench technique and characterized by X‐ray diffraction (XRD), Fourier transform‐infrared (FT‐IR) spectroscopy, UV/Vis optical absorption (OA), and photoluminescence (PL) spectroscopy including decay kinetics assessment. The XRD data confirmed the amorphous nature of the glasses whereas FT‐IR spectra indicated the basic structural features of trigonal BO3 units and BO4 tetrahedra. The OA analysis showed that addition of CuO up to 0.5 mol% results in significant growth of the visible Cu2+ absorption band around 715 nm, with slight decrease in the optical band gap energies assessed through Tauc plots. A drastic PL quenching of Eu3+ ions emission was evidenced concurring with the detrimental effect of Cu2+. The assessment of the Eu3+ emission decay curves revealed significant lifetime decrease of the 5D0 emitting state with increasing CuO concentration. An analysis of quenching constants was finally performed comparing results from integrated PL data with the emission decay rates. It is argued that the bismuth borate glass system supports an effective Eu3+→Cu2+ energy transfer (more so than phosphates) in connection with a strong spectral overlap between Eu3+ emission and Cu2+ absorption.

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Section: Optical Absorption (Oa) Evaluationmentioning

confidence: 65%

Section: Optical Absorption (Oa) Evaluationmentioning

confidence: 94%

Section: Optical Absorption (Oa) Evaluationmentioning

confidence: 99%

Section: Optical Absorption (Oa) Evaluationmentioning

confidence: 99%

See 2 more Smart Citations

Optical Spectroscopy and Excited‐State Dynamics of Eu³⁺‐Doped Bismuth Borate Glasses Containing CuO

Jiménez

Darley

2020

ChemPhysChem

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“…In particular, for x ≧ 0.20, its intensity drastically increased, and the glasses were strongly colored in blue-green. In addition, since a strong absorption band due to the 3d 9 4s 1 ( 3 D)←3d 10 ( 1 S) transition of Cu + ions appeared in the wavelength region shorter than 325 nm as will be mentioned below, 12 and since the number of nonbridging oxygen and color center 15,16 increased with an increase in x, the apparent absorption edge shifted to the long wavelength. Fluorescence and excitation spectra for the 60P 2 O 5 -35ZnO-5Al 2 O 3 -8MnO-xCu 2 O glasses are shown in Figure 2.…”

Section: Cu 2 Omentioning

confidence: 87%

Preparation of Mn²⁺‐Cu⁺ co‐doped P₂O₅–ZnO–Al₂O₃ glasses and their red fluorescence properties

et al. 2019

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To make a Mn 2+ -doped red glass phosphor that can be excited with ultraviolet (UV) light of light-emitting diodes (LEDs), 60P 2 O 5 -35ZnO-5Al 2 O 3 -8MnO-xCu 2 O glasses (x = 0-1.00) were prepared by a melt-quenching method at 1200-1400°C for 30-180 minutes in atmospheric air, and the redox of Mn and Cu as well as fluorescence properties were investigated. The Mn 2+ ion was not reduced and oxidized in the melting, quenching, and annealing processes. The valence of Cu in the glasses changed in the order of 0, 1+, and 2+ with the increase in the amount of Cu 2 O and in the melting temperature and time. In this study, a 60P 2 O 5 -35ZnO-5Al 2 O 3 -8MnO-0.10Cu 2 O glass melted at 1250°C for 90 minutes, having the highest Cu + concentration, showed the strongest Mn 2+ red fluorescence under the UV light at 275 nm. This strong Mn 2+ red fluorescence has been caused by the energy transfer from excited Cu + ions to Mn 2+ ions.

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Incorporating Er:YAP Microcrystals Into Tellurite Fiber Using Volumetric Interface Doping

Lee,

Wei,

Ren

et al. 2024

Advanced Optical Materials

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In this semi‐quantitative study, laser crystal microparticles which are potentially capable of generating mid‐infrared (MIR) light are incorporated into MIR transmitting optical fibers using a volumetric interface doping technique that combines interface doping with volumetric doping. Using confocal microscopy with a refractive index matching fluid, the Er:YAP microcrystals (MCs) inside the tellurite glass fiber are observed based on the detection of the green upconversion fluorescence emission of Er3+ ions, produced under excitation at 976 nm and localized at the central region within the fiber. The key outcome from this proof‐of‐concept study is that MC particles that are fused with the glass during the fiber drawing process survived heat treatment because the MC particles are exposed for a short time to a glass fluid with high viscosity of ≈105 Pa.s, which prevented the glass from exerting a dissolution effect. The survival of the MCs demonstrated the viability of the doping technique for fabricating fibers with exotic crystal‐glass combinations for applications including good refractive index matching across the pump and lasing bands of rare earth ions. This latter parameter provides significant particle size flexibility whilst minimizing additional loss from scattering especially at MIR wavelengths where the MC diameter‐to‐wavelength ratio becomes smaller.

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Optical properties of zinc tellurite glasses doped with Cu2+ ions

Cited by 32 publications

References 89 publications

Optical Spectroscopy and Excited‐State Dynamics of Eu³⁺‐Doped Bismuth Borate Glasses Containing CuO

Optical Spectroscopy and Excited‐State Dynamics of Eu³⁺‐Doped Bismuth Borate Glasses Containing CuO

Preparation of Mn²⁺‐Cu⁺ co‐doped P₂O₅–ZnO–Al₂O₃ glasses and their red fluorescence properties

Incorporating Er:YAP Microcrystals Into Tellurite Fiber Using Volumetric Interface Doping

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Optical properties of zinc tellurite glasses doped with Cu2+ ions

Cited by 32 publications

References 89 publications

Optical Spectroscopy and Excited‐State Dynamics of Eu3+‐Doped Bismuth Borate Glasses Containing CuO

Optical Spectroscopy and Excited‐State Dynamics of Eu3+‐Doped Bismuth Borate Glasses Containing CuO

Preparation of Mn2+‐Cu+ co‐doped P2O5–ZnO–Al2O3 glasses and their red fluorescence properties

Incorporating Er:YAP Microcrystals Into Tellurite Fiber Using Volumetric Interface Doping

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Product

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About

Optical Spectroscopy and Excited‐State Dynamics of Eu³⁺‐Doped Bismuth Borate Glasses Containing CuO

Optical Spectroscopy and Excited‐State Dynamics of Eu³⁺‐Doped Bismuth Borate Glasses Containing CuO

Preparation of Mn²⁺‐Cu⁺ co‐doped P₂O₅–ZnO–Al₂O₃ glasses and their red fluorescence properties