Insights into Ba4Si6O16 structure and photoluminescence tuning of Ba4Si6O16:Ce3+,Eu2+ phosphors

Chen, Mingyue; Xia, Zhiguo; Мolokeev, Maxim S.; Liu, Quanlin

doi:10.1039/c5tc03271g

Cited by 38 publications

(9 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, barium silicate-based ceramics are used as solid-oxide sealant materials (e.g. Namwong et al 2010), erasable-writable optical storage devices (Lin et al 2019), and, when doped with rare-earth elements, as light emitting diode materials (Xiao et al 2009;Chen et al 2015). Barium silicates are built of SiO 4 ntetrahedra, the fundamental building blocks of almost all silicate minerals and liquids (Liebau 1985).…”

Section: Introductionmentioning

confidence: 99%

A theoretical and experimental investigation of hetero- vs. homo-connectivity in barium silicates

Moulton

Gomes

Cunha

et al. 2022

American Mineralogist

View full text Add to dashboard Cite

Barium silicates may be found in contact aureoles and are used in several important technologies (e.g. LEDs). The BaO-SiO 2 system stabilizes 13 crystalline phases with different silicate tetrahedral and connectivity profiles. Aside from phases composed of a single structural unit (isolated or homo-connected tetrahedra) one encounters the relatively rare case of heteroconnected tetrahedra in which varying proportions of several Q n species are linked together. Here, we analyze the 29 Si MAS NMR and Raman spectroscopic manifestations of the connectivities in seven barium silicates: Ba 2 SiO 4 , high-BaSiO 3 , Ba 4 Si 6 O 16 , Ba 5 Si 8 O 21 , Ba 6 Si 10 O 26 , high-BaSi 2 O 5 and sanbornite (low-BaSi 2 O 5 ). The structures and purity of these phases were confirmed by Rietveld refinement. From the Raman spectroscopic database on 144predominantly homo-connected crystalline silicates, the mean Q n mode frequencies (ν Qn ± 1σ) are found at 827.7 (±13.8) cm -1 for Q 0 , 905.3 (±22.1) cm -1 for Q 1 , 993.5 (±25.9) cm -1 for Q 2 , and 1068.4 (±17.6) cm -1 for Q 3 units. Experimentally, homo-connected barium silicates show good agreement with these values whereas the hetero-connected phases show a wider range of ν Q2 than of ν Q3 frequencies. While the 29 Si NMR chemical shifts of the barium silicates are in agreement with known structural trends, those measured for the Q 2 resonances remain essentially constant, which may be caused by the lattice distortion around the large Ba 2+ cations. To complement and rationalize experimental measurements, first-principles calculations, at the This is the peer-reviewed, final accepted version for American Mineralogist, published by the Mineralogical Society of America.The published version is subject to change. Cite as Authors (Year) Title. American Mineralogist, in press.

show abstract

Section: Introductionmentioning

confidence: 99%

A theoretical and experimental investigation of hetero- vs. homo-connectivity in barium silicates

Moulton

Gomes

Cunha

et al. 2022

American Mineralogist

View full text Add to dashboard Cite

show abstract

“…From the PLE spectra, it can be seen that the obtained samples showed a broad excitation band from 250 to 450 nm, indicating the potential application in near UV chip‐based LEDs. Researchers have demonstrated the application of (BaO‐SiO 2 ):Eu 2+ phosphors in near‐UV‐ or blue chip‐based LEDs . A symmetrical broad yellow emission band peaked at 570 nm (λ ex = 350 nm) and a full width at half maximum (FWHM) about 125 nm was recorded for the precipitation reaction prepared BaSiO 3 :Eu 2+ phosphor.…”

Section: Resultsmentioning

confidence: 99%

“…As a member of the silicate phosphors, the BaO‐SiO 2 :Eu 2+ phosphor system with different Ba/Si mole ratios (e.g. BaSiO 3 :Eu 2+ , Ba 2 SiO 4 :Eu 2+ , Ba 3 SiO 5 :Eu 2+ , BaSi 2 O 5 :Eu 2+ , Ba 4 Si 6 O 16 :Eu 2+ ) has been reported for application in WLEDs . For the orthorhombic BaSiO 3 :Eu 2+ phosphor, a broad yellow luminescence band with a maximum at 550 nm at 4.2 K was first reported by Blasse in 1996 .…”

Section: Introductionmentioning

confidence: 99%

Insights into the discrepant luminescence for BaSiO₃:Eu²⁺ phosphors prepared by solid‐state reaction and precipitation reaction methods

Zhao

Chen

et al. 2017

Luminescence

View full text Add to dashboard Cite

Two synthesis routes, solid-state reaction and precipitation reaction, were employed to prepare BaSiO :Eu phosphors in this study. Discrepancies in the luminescence green emission at 505 nm for the solid-state reaction method sample and in the yellow emission at 570 nm for the sample prepared by the precipitation reaction method, were observed respectively. A detail investigation about the discrepant luminescence of BaSiO :Eu phosphors was performed by evaluation of X-ray diffraction (XRD), photoluminescence (PL)/photoluminescence excitation (PLE), decay time and thermal quenching properties. The results showed that the yellow emission was generated from the BaSiO :Eu phosphor, while the green emission was ascribed to a small amount of Ba SiO :Eu compound that was present in the solid-state reaction sample. This work clarifies the luminescence properties of Eu ions in BaSiO and Ba SiO hosts.

show abstract

“…A glass of molar composition Al2O3(3)-SiO2(58.2)-BaO (38.8), referred to as B2S3 in what follows, with a Ba/Si ratio (2/3) similar to that of the Ba2Si3O8 crystallized phase, was chosen to promote congruent crystallization. Interest in this crystallized phase is that when doped with rare-earth it exhibits interesting optical properties [27,28]. A small quantity of alumina was added to limit crystallization during cooling.…”

Section: Materials Synthesis and Methods: 21 Glassmentioning

confidence: 99%

Nucleation and crystallization of Ba2Si3O8 spherulites in a barium aluminum silicate glass, and mechanical properties of the obtained glass-ceramics

Moriceau

Houizot

et al. 2021

Journal of the European Ceramic Society

View full text Add to dashboard Cite

The effect of spherulitic crystallization on the elastic moduli and fracture toughness of a barium aluminum silicate glass was investigated. The crystallization process results in Ba2Si3O8 phase and is initiated from Ba rich nuclei. Nucleation is optimal in the 690-720 °C interval. Young's modulus is increased by 12.5% when the glass-ceramic conversion is nearly complete. Nevertheless, as the size and the volume fraction of crystals are increased, some microcracking shows up upon cooling from the crystallization temperature. An optimal improvement of the fracture toughness (SEPB method) by 27 % is observed for a 49 % volume fraction of 5 to 10 m large spherulites.

show abstract

Insights into Ba₄Si₆O₁₆ structure and photoluminescence tuning of Ba₄Si₆O₁₆:Ce³⁺,Eu²⁺ phosphors

Abstract: An investigation of the structure and photoluminescence tuning of Ce3+/Li+,Eu2+ singly-doped and Ce3+/Li+/Eu2+-co-doped Ba4Si6O16 phosphors has been undertaken.

Cited by 38 publications

References 39 publications

A theoretical and experimental investigation of hetero- vs. homo-connectivity in barium silicates

A theoretical and experimental investigation of hetero- vs. homo-connectivity in barium silicates

Insights into the discrepant luminescence for BaSiO₃:Eu²⁺ phosphors prepared by solid‐state reaction and precipitation reaction methods

Nucleation and crystallization of Ba2Si3O8 spherulites in a barium aluminum silicate glass, and mechanical properties of the obtained glass-ceramics

Contact Info

Product

Resources

About

Insights into Ba4Si6O16 structure and photoluminescence tuning of Ba4Si6O16:Ce3+,Eu2+ phosphors

Abstract: An investigation of the structure and photoluminescence tuning of Ce3+/Li+,Eu2+ singly-doped and Ce3+/Li+/Eu2+-co-doped Ba4Si6O16 phosphors has been undertaken.

Cited by 38 publications

References 39 publications

A theoretical and experimental investigation of hetero- vs. homo-connectivity in barium silicates

A theoretical and experimental investigation of hetero- vs. homo-connectivity in barium silicates

Insights into the discrepant luminescence for BaSiO3:Eu2+ phosphors prepared by solid‐state reaction and precipitation reaction methods

Nucleation and crystallization of Ba2Si3O8 spherulites in a barium aluminum silicate glass, and mechanical properties of the obtained glass-ceramics

Contact Info

Product

Resources

About

Insights into Ba₄Si₆O₁₆ structure and photoluminescence tuning of Ba₄Si₆O₁₆:Ce³⁺,Eu²⁺ phosphors

Insights into the discrepant luminescence for BaSiO₃:Eu²⁺ phosphors prepared by solid‐state reaction and precipitation reaction methods