Silica nanoparticles assisted preparation of reddish-yellow emitting Eu2+ activated remote-type CaSrSiO4 phosphor for warm white LED applications

Mayavan, Abinaya; Krishnan, Senthil Durai; Rajendran, P.; Jang, Kiwan; Gandhi, Sakthivel

doi:10.1016/j.ceramint.2020.01.269

Cited by 14 publications

(1 citation statement)

References 32 publications

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“…The main problem related to carbon dots is that their emission quenches while being in the solid state [35], which can be caused by their aggregation. Similarly, in previous studies [36][37][38] it was shown that the light emission characteristics of phosphor depend on its morphology. Embedding C-dots into the pores of SiO 2 particles allowed the realization of their spatial distribution without forming aggregates and preserving their optical characteristics after drying.…”

Section: (B) Curve 2)supporting

confidence: 59%

Micro-mesoporous submicron silica particles with pore size tunable in a wide range: synthesis, properties and prospects for LED manufacturing

Eurov¹,

Kurdyukov²,

Medvedev³

et al. 2021

Nanotechnology

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An approach has been developed that allows the synthesis of submicron spherical silica particles with a controlled micro-mesoporous structure possessing a large specific surface area (up to 1300 m2 g−1). Particle synthesis is carried out by the hydrolysis of a mixture of various organosilanes mostly associated either with CTAB or with each other. A change in the concentration of CTAB in the reaction mixture apparently leads to a change in the formation mechanism of nuclei for the silica particle growth, which allows for varying the diameter of the synthesized particles in the range from 40–450 nm. The effect of the composition of the silica precursor ([3-(methacryloyloxy)propyl]trimethoxysilane, (3-aminopropyl)triethoxysilane and tetraethoxysilane) on the formation process and porosity of the resulting particles is studied. It was shown that by simply varying the ratio of organosilanes in the composition of the precursor, one can control the pore diameter of the particles in a wide range from 0.6–15 nm. The large-pore (up to 15 nm) silica particles are used as a matrix for the spatial distribution of luminescent carbon dots. The incorporation of carbon dots into SiO2 particles prevents their aggregation leading to emission quenching after drying, thus allowing us to obtain highly luminescent composite particles. LEDs based on the obtained composite material show bright visible luminescence with spectral characteristics similar to that of a commercial cold white LED.

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Section: (B) Curve 2)supporting

confidence: 59%

Micro-mesoporous submicron silica particles with pore size tunable in a wide range: synthesis, properties and prospects for LED manufacturing

Eurov¹,

Kurdyukov²,

Medvedev³

et al. 2021

Nanotechnology

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Site‐Engineering for Controlling Multiple‐Excitation and Emission in Eu²⁺‐Activated CaSrSiO₄ Phosphors in Marine Fisheries

Liu

Wen

et al. 2023

Advanced Optical Materials

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Designing Tb³⁺‐Sensitized Silica‐Nanoparticles‐Aided Eu³⁺‐Doped Sr₂SiO₄ Phosphors with Enhanced Luminescence for Anti‐Counterfeiting Applications

Mayavan,

Ganesamurthi,

Balaji

et al. 2024

Advanced Photonics Research

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Silica‐nanoparticles‐assisted Eu3+‐doped Sr2SiO4 and Tb3+‐ and Eu3+‐co‐doped Sr2SiO4 phosphors, as potential phosphors for anti‐counterfeiting application are synthesized via a solid‐state reaction technique. The crystal structure, photoluminescence, and decay times are investigated. The characteristic emission of Eu3+‐doped Sr2SiO4 phosphors exhibits two major peaks at 617 and 595 nm under an excitation wavelength of 394 nm, which corresponds to 5D0 → 7F2 and 5D0 → 7F1 electron transitions of Eu3+ ions. Upon co‐doping with Tb3+, the red emission intensities of the Eu3+‐doped Sr2SiO4 phosphors are enhanced by 1.78‐fold times through an energy‐transfer process. The optimized Tb3+‐ and Eu3+‐co‐doped Sr2SiO4 phosphors show a decay time of 0.49 ns and an energy‐transfer efficiency of 73%. The calculated International Commission on Illumination value (x, y) and color purity are (0.63, 0.37) and 94%, respectively. Subsequently, a luminescent ink is formulated using the optimized phosphor and tested for efficiency on currency notes. Additionally, a flexible film is fabricated, and its luminescence properties are studied. The formulated ink can serve as security ink in the anti‐counterfeiting application.

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Silica nanoparticles assisted preparation of reddish-yellow emitting Eu2+ activated remote-type CaSrSiO4 phosphor for warm white LED applications

Cited by 14 publications

References 32 publications

Micro-mesoporous submicron silica particles with pore size tunable in a wide range: synthesis, properties and prospects for LED manufacturing

Micro-mesoporous submicron silica particles with pore size tunable in a wide range: synthesis, properties and prospects for LED manufacturing

Site‐Engineering for Controlling Multiple‐Excitation and Emission in Eu²⁺‐Activated CaSrSiO₄ Phosphors in Marine Fisheries

Designing Tb³⁺‐Sensitized Silica‐Nanoparticles‐Aided Eu³⁺‐Doped Sr₂SiO₄ Phosphors with Enhanced Luminescence for Anti‐Counterfeiting Applications

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Silica nanoparticles assisted preparation of reddish-yellow emitting Eu2+ activated remote-type CaSrSiO4 phosphor for warm white LED applications

Cited by 14 publications

References 32 publications

Micro-mesoporous submicron silica particles with pore size tunable in a wide range: synthesis, properties and prospects for LED manufacturing

Micro-mesoporous submicron silica particles with pore size tunable in a wide range: synthesis, properties and prospects for LED manufacturing

Site‐Engineering for Controlling Multiple‐Excitation and Emission in Eu2+‐Activated CaSrSiO4 Phosphors in Marine Fisheries

Designing Tb3+‐Sensitized Silica‐Nanoparticles‐Aided Eu3+‐Doped Sr2SiO4 Phosphors with Enhanced Luminescence for Anti‐Counterfeiting Applications

Contact Info

Product

Resources

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Site‐Engineering for Controlling Multiple‐Excitation and Emission in Eu²⁺‐Activated CaSrSiO₄ Phosphors in Marine Fisheries

Designing Tb³⁺‐Sensitized Silica‐Nanoparticles‐Aided Eu³⁺‐Doped Sr₂SiO₄ Phosphors with Enhanced Luminescence for Anti‐Counterfeiting Applications