Optically active nano-glass-ceramic coatings of Nd3+ doped-80SiO2-20LaF3 prepared by the pre-crystallized nanoparticles sol-gel route

Cruz, María Eugenia; Fernández, José Rodríguez; Durán, Alicia; Balda, Rolindes; Castro, Yolanda

doi:10.1016/j.jnoncrysol.2022.122050

Cited by 7 publications

(7 citation statements)

References 45 publications

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“…The luminescence intensities of green and red emissions are higher in glass-ceramic compared to glass and ceramic. In addition, the Stark splitting observed in the glass-ceramic confirms the ordered local field environment of rare-earth ions, which reduces the probability of the multiphonon nonradiative relaxation of erbium and ytterbium ions [31]. The enhancement of the upconversion luminescence of the glass-ceramic compared to the glass may be correlated with the partial incorporation of erbium ions in the low phonon energy nanocrystals of the Ba 0.75 Er 0.25 F 2.25 [32].…”

Section: Optical Characterization 331 Upconversion Luminescencementioning

confidence: 59%

“…However, their low thermal stability limits their use. For that reason, the use of other dopants such as GeO 2 that increase its thermal stability and maintain its high RE solubility results very attractive [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32]. Also, it was observed that its presence diminishes the phonon density of the glass, causing a slight enhancement in the UC emission intensity [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

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Efficient green upconversion emission in transparent Teo2-Geo2 glass-ceramic obtained by billet extrusion

Leśniak,

Jiménez,

Starzyk

et al. 2024

Metrology and Measurement Systems

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Transparent Yb3+/Er3+glass-ceramic was successfully obtained by the extrusion method. The extrusion of oxyfluoride tellurite-germanate glass co-doped with Yb3+and Er3+ions at 520°C resulted in the formation of Ba0:75Er0:25F2:25 nanocrystals, leading to an increase in the upconversion (UC) emission intensity of 35 times in glass-ceramic with respect to the glass. The glass to glass-ceramic transition was confirmed by X-ray diffraction (XRD) and Transmission electron microscope (TEM). Also, the structural changes that occurred during crystallization were assessed using Fourier-transform infrared (FTIR) spectroscopy. Furthermore, the pump power and temperature UC emission dependence of glass and glass-ceramic under 976 nm laser excitation were investigated in detail. The assessments showed that i) two-phonons are involved in the UC process and ii) the temperature has a significant influence over it. The Yb3+/Er3+ codoped glass-ceramic shows relatively high Sa and Sr values in a wide temperature range from 300 to 573 K, presenting the maximal Sa value of 3:50 x 10–3 at 573 K and the maximal Sr value of 6:30 x 10–3at 364 K. These results suggest that the glass-ceramic is a good candidate for optical applications such as luminescent thermometry.

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Section: Optical Characterization 331 Upconversion Luminescencementioning

confidence: 59%

Section: Introductionmentioning

confidence: 99%

Efficient green upconversion emission in transparent Teo2-Geo2 glass-ceramic obtained by billet extrusion

Leśniak,

Jiménez,

Starzyk

et al. 2024

Metrology and Measurement Systems

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“…By using the calculated E and the D hkl taken from the Scherrer equation (Equation ( 1)) for all peaks, a linear regression was generated with its corresponding slope and y-intercept. Considering that the linear regression corresponds to Equation (3), the strain component was calculated from the slope and the crystallite size from the yintercept [33,34,44].…”

Section: Synthesis Of Oxgcs With Compositionmentioning

confidence: 99%

“…The optical characterisation of the OxGCs powders was also reported, with similar lifetimes to those for nanoparticles. Later, the GlaSS group reported the preparation of OxGCs coatings with the composition Nd 3+ -doped 80SiO 2 -20LaF 3 , obtaining a bulk-like lifetime value of 440 µs [33].…”

Section: Introductionmentioning

confidence: 99%

Novel Sol-Gel Route to Prepare Eu3+-Doped 80SiO2-20NaGdF4 Oxyfluoride Glass-Ceramic for Photonic Device Applications

et al. 2023

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Oxyfluoride glass-ceramics (OxGCs) with the molar composition 80SiO2-20(1.5Eu3+: NaGdF4) were prepared with sol-gel following the “pre-crystallised nanoparticles route” with promising optical results. The preparation of 1.5 mol % Eu3+-doped NaGdF4 nanoparticles, named 1.5Eu3+: NaGdF4, was optimised and characterised using XRD, FTIR and HRTEM. The structural characterisation of 80SiO2-20(1.5Eu3+: NaGdF4) OxGCs prepared from these nanoparticles’ suspension was performed by XRD and FTIR revealing the presence of hexagonal and orthorhombic NaGdF4 crystalline phases. The optical properties of both nanoparticles’ phases and the related OxGCs were studied by measuring the emission and excitation spectra together with the lifetimes of the 5D0 state. The emission spectra obtained by exciting the Eu3+-O2− charge transfer band showed similar features in both cases corresponding the higher emission intensity to the 5D0→7F2 transition that indicates a non-centrosymmetric site for Eu3+ ions. Moreover, time-resolved fluorescence line-narrowed emission spectra were performed at a low temperature in OxGCs to obtain information about the site symmetry of Eu3+ in this matrix. The results show that this processing method is promising for preparing transparent OxGCs coatings for photonic applications.

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“…Embedding the optically active nanoparticles into a glass matrix is a promising strategy to fabricate multifunctional devices for lighting, digital display, optical communication, and biosensing without the disadvantages of agglomeration of nanoparticles, which leads to unexpected transmission loss and luminescent quenching. − The melting technique, ion implantation technique, and femtosecond laser radiation induction technique have been developed for incorporating the nanoparticles into the glass matrix. However, the high melting temperature required for glass melting, − the possibility of damaging the glass network for the ion implantation technique, and the complexity of the lab equipment needed for femtosecond laser radiation trigger the development of cost-effective technology for fabricating nanoparticle doped glass composites. , …”

Section: Introductionmentioning

confidence: 99%

Nanoconfined Synthesis of Lead Sulfide Quantum Dots Embedded in Mesoporous Aluminosilicate Glass with Adjustable Near-Infrared Broadband Luminescence

Chen,

Lau

et al. 2024

Chem. Mater.

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Functionalizing glass with optically active quantum dots has shown great potential in near-infrared bioimaging and optical communication. However, the size distribution of quantum dots is hard to control by traditional glass quenching method due to extremely high processing temperature (∼1300 °C), resulting in unexpected transmission loss and luminescent quenching of quantum dots embedded in a glass composite. Herein, we developed a nanoconfined synthesis of lead sulfide (PbS) quantum dots in a mesoporous aluminosilicate glass matrix at a relatively low temperature of 600 °C with adjustable near-infrared broadband luminescence. The sol−gel-synthesized glass composite precursor with high surface areas over 480 m 2 /g and a nanopore mean diameter of about 3.2 nm can enable the homogeneous dispersal of PbS quantum dots in the mesoporous glass matrix as well as restrict the overgrowth of quantum dots to prevent aggregation. The PbS−AS glass composites exhibited dual-band near-infrared luminescence, showcasing morphological and nonlinear saturable absorption properties. The 0.8PbS−AS glass served as an effective saturable absorber for a passively mode-locked Er-doped fiber laser, achieving a pulse repetition rate of ∼0.09 kHz/mW and a pulse width of ∼0.04 μs/kHz. The PbS−SA is confirmed to be suitable for a Q-switched mode-locking laser, showing high potential for mode-locked laser generation with further SA optimization.

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Optically active nano-glass-ceramic coatings of Nd3+ doped-80SiO2-20LaF3 prepared by the pre-crystallized nanoparticles sol-gel route

Cited by 7 publications

References 45 publications

Efficient green upconversion emission in transparent Teo2-Geo2 glass-ceramic obtained by billet extrusion

Efficient green upconversion emission in transparent Teo2-Geo2 glass-ceramic obtained by billet extrusion

Novel Sol-Gel Route to Prepare Eu3+-Doped 80SiO2-20NaGdF4 Oxyfluoride Glass-Ceramic for Photonic Device Applications

Nanoconfined Synthesis of Lead Sulfide Quantum Dots Embedded in Mesoporous Aluminosilicate Glass with Adjustable Near-Infrared Broadband Luminescence

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