Structural and Photoluminescence Investigations of Tb3+/Eu3+ Co-Doped Silicate Sol-Gel Glass-Ceramics Containing CaF2 Nanocrystals

Pawlik, Natalia; Szpikowska‐Sroka, Barbara; Goryczka, Tomasz; Pisarska, Joanna; Pisarski, Wojciech A.

doi:10.3390/ma14040754

Cited by 11 publications

(4 citation statements)

References 81 publications

(129 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The crucial aspect of analyzing the optical properties of transparent glass-ceramics, ceramics, and various phosphors is the characterization of the luminescence, which results from the 4f-4f electronic transitions of rare earth ions [ 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 ]. It is worth noting that studies of ceramic samples containing trivalent holmium ions are focused on characterizing the efficient green visible emission [ 6 , 18 , 48 ].…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Li2MgGeO4:Ho3+

et al. 2022

Self Cite

View full text Add to dashboard Cite

In this work, the synthesis and characterization of Li2MgGeO4:Ho3+ ceramics were reported. The X-ray diffraction measurements revealed that the studied ceramics belong to the monoclinic Li2MgGeO4. Luminescence properties were analyzed in the visible spectral range. Green and red emission bands correspondent to the 5F4,5S2→5I8 and 5F5→5I8 transitions of Ho3+ were observed, and their intensities were significantly dependent on activator concentration. Luminescence spectra were also measured under direct excitation of holmium ions or ceramic matrix. Holmium ions were inserted in crystal lattice Li2MgGeO4, giving broad blue emission and characteristic 4f-4f luminescent transitions of rare earths under the selective excitation of the ceramic matrix. The presence of the energy transfer process between the host lattice and Ho3+ ions was suggested.

show abstract

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Li2MgGeO4:Ho3+

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…This is particularly evident in samples with 0.75 mol% and 1.0 mol% phosphorus content. For amorphous materials, the results are approximated by a single-exponential function, while the appearance of crystalline structures requires a dual-exponential function [ 4 , 43 ]. Data from the experiment were fitted by the following equation:

…”

Section: Resultsmentioning

confidence: 99%

“…The double-exponential character of the decay curves indicates the presence of two different surroundings of europium ions. Long lifetime τ 1 corresponds to higher symmetry of the crystal field, while short lifetime τ 2 is connected with lower symmetry of the Eu 3+ surroundings [ 4 , 12 , 43 ].…”

Section: Resultsmentioning

confidence: 99%

Crystallization Mechanism and Optical Properties of Antimony-Germanate-Silicate Glass-Ceramic Doped with Europium Ions

et al. 2022

Self Cite

View full text Add to dashboard Cite

Glass-ceramic is semi-novel material with many applications, but it is still problematic in obtaining fibers. This paper aims to develop a new glass-ceramic material that is a compromise between crystallization, thermal stability, and optical properties required for optical fiber technology. This compromise is made possible by an alternative method with a controlled crystallization process and a suitable choice of the chemical composition of the core material. In this way, the annealing process is eliminated, and the core material adopts a glass-ceramic character with high transparency directly in the drawing process. In the experiment, low phonon antimony-germanate-silicate glass (SGS) doped with Eu3+ ions and different concentrations of P2O5 were fabricated. The glass material crystallized during the cooling process under conditions similar to the drawing processes’. Thermal stability (DSC), X-ray photo analysis (XRD), and spectroscopic were measured. Eu3+ ions were used as spectral probes to determine the effect of P2O5 on the asymmetry ratio for the selected transitions (5D0 → 7F1 and 5D0 → 7F2). From the measurements, it was observed that the material produced exhibited amorphous or glass-ceramic properties, strongly dependent on the nucleator concentration. In addition, the conducted study confirmed that europium ions co-form the EuPO4 structure during the cooling process from 730 °C to room temperature. Moreover, the asymmetry ratio was changed from over 4 to under 1. The result obtained confirms that the developed material has properties typical of transparent glass-ceramic while maintaining high thermal stability, which will enable the fabrication of fibers with the glass-ceramic core.

show abstract

“…Inorganic silicate materials containing Eu 3+ and Tb 3+ are already known from a number of publications with a theoretical and applied focus [6][7][8][9][10][11]. Moreover, binary lanthanide aerogels are prepared during the search for porous materials with suitable optical and catalytic activities [12].…”

Section: Introductionmentioning

confidence: 99%

Luminescence of Binary-Doped Silica Aerogel Powders: A Two-Step Sol-Gel Approach

Shandurkov,

Danchova,

Spassov

et al. 2024

Gels

View full text Add to dashboard Cite

In this study, we report a novel synthesis of hydrophobic silica aerogel powder composites, functionalized and binary-doped with [Tb(phen)2](NO3)3 and [Eu(phen)2](NO3)3 nanocrystals, employing a two-step sol-gel methodology. The investigation delves into the structural elucidation, optical properties and thermal conductivity of these functionalized Tb(III)-Eu(III) composites. Our analysis includes diffuse reflectance spectra and excitation and luminescence spectra, highlighting the quantum yields of composites with varying chemical compositions. Remarkably, these samples exhibit a strong luminescence, with distinct hues of red or green based on the specific doping type and level. The detailed examination of excitation spectra and quantum yields establishes robust energy-transfer mechanisms from the 1,10-phenanthroline molecule to the lanthanide ions. Notably, our study uncovers a Tb3⁺→Eu3⁺ energy-transfer phenomenon within the binary functionalized samples, providing compelling evidence for a structural formation process occurring within the mesoporous framework of the aerogel powders.

show abstract

Structural and Photoluminescence Investigations of Tb3+/Eu3+ Co-Doped Silicate Sol-Gel Glass-Ceramics Containing CaF2 Nanocrystals

Cited by 11 publications

References 81 publications

Synthesis and Characterization of Li2MgGeO4:Ho3+

Synthesis and Characterization of Li2MgGeO4:Ho3+

Crystallization Mechanism and Optical Properties of Antimony-Germanate-Silicate Glass-Ceramic Doped with Europium Ions

Luminescence of Binary-Doped Silica Aerogel Powders: A Two-Step Sol-Gel Approach

Contact Info

Product

Resources

About