Synthesis, structural and photoluminescence behaviour of novel La2SiO5:Eu3+/Tb3+ nanomaterials for UV-LEDs

Singh, Devender; Simantilleke, Anura Priyajith

doi:10.1016/j.ijleo.2020.165324

Cited by 12 publications

(2 citation statements)

References 34 publications

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“…Together with these peaks, two highly intense green emissions are present at 542 and 551 nm. All emission peaks originate from transitions between the 5 D 3 and 5 D 4 excited levels and the 7 F j ground state of Tb 3+ ions [41][42][43].…”

Section: Optical Characterizationmentioning

confidence: 99%

Concentration‐dependent luminescence characterization of terbium‐doped strontium aluminate nanophosphors

Thomas,

Safeera,

Vanchipurackal

et al. 2024

Luminescence

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The present investigation describes the synthesis of luminescent terbium‐doped strontium aluminate nanoparticles emitting bright green light, which were synthesized through a solid‐state reaction method assisted by microwave radiation. Various samples containing different concentrations of Tb were synthesized, and an analysis of their structural and morphological features was conducted using powder x‐ray diffraction, Fourier transform infrared spectroscopy and field emission scanning electron microscopy. The band gaps of the samples were determined utilizing the Kubelka–Munk method. The quenching mechanism observed was identified to be due to dipole–dipole interaction using the Dexter theory. The optimized sample with a terbium concentration of 4 at.% has a luminescence lifetime of 1.05 ms with 20.62% quantum efficiency. The results of this study indicate that the terbium‐doped strontium aluminate fluorescent nanoparticles exhibit promising potential for a wide range of applications, including bioimaging, sensing and solid‐state lighting.

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Section: Optical Characterizationmentioning

confidence: 99%

Concentration‐dependent luminescence characterization of terbium‐doped strontium aluminate nanophosphors

Thomas,

Safeera,

Vanchipurackal

et al. 2024

Luminescence

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“…[ 4 ] For the last two decades, a number of nanophosphors codoped with Bi 3+ ‐Eu 3+ have attracted attention of many researchers due to their potential applications relevant to general illumination applications, light‐emitting diode (LED) displays and luminescent thermometers. [ 5–7 ] An efficient enhanced red emission from Eu 3+ was observed in Bi 3+ ‐Eu 3+ codoped nanophosphors on comparison with Eu 3+ singly doped nanophosphors, for instance the energy transfer between Bi 3+ and Eu 3+ in LaScO 3 , ZnWO 4 , GdVO 4 and CaWO 4 phosphors emits an efficient enhanced red emission from Eu 3+ . [ 8–11 ] Among the rare earth ions (RE 3+ ), the Eu 3+ (4f 6 ) is a well‐known and extensively researched red‐emitting activator.…”

Section: Introductionmentioning

confidence: 99%

Tunable luminescence from Bi³⁺ sensitized La₂Zr₂O₇:Eu³⁺ red nanophosphors for display applications

Kumar

Venkatarao

Shaik³

et al. 2022

Luminescence

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Bismuth ion (Bi3+) sensitized, europium ion (Eu3+) activated La2Zr2O7 nanophosphors are prepared successfully by simple wet chemical method. Strong blue emission of singly doped La2Zr2O7 with Bi3+ was observed at 310 nm excitation, its wide emission spectrum has a peak maximum at 465 nm ascribed to electronic transition 3P1 → 1S0 of Bi3+. The recorded photoluminescence spectra of y at% Eu3+ codoped La2Zr2O7, when excited at 285 nm, the emission spectrum exhibits maximum peaks at wavelength values 615 nm, 646 nm and 665 nm which are ascribed to 5D0 → 7F2, 5D0 → 7F3 and 5D0 → 7F4 transitions of Eu3+ respectively. The chromaticity coordinates for the optimized sample were found to be (0.519, 0.329). Sensitizing with Bi3+ can affect the luminescence properties of La2Zr2O7:Eu3+ phosphors. With reference to the change in Eu3+ concentration from Y = 1, 2, 3, 4 and 5%, color tunable luminescence from blue to orange, red of La2Zr2O7:Bi3+,Eu3+ phosphors are observed. The lifetime decay values, energy level description and CIE chromatic color coordinates for Bi3+, Eu3+ in La2Zr2O7:Bi3+,Eu3+ codoped sample was discussed. The spectral overlap between sensitizer, activator ions confirms the efficient energy transfer from Bi3+ to Eu3+ in La2Zr2O7:Bi3+,Eu3+ codoped sample and is via a dipole‐quadruple mechanism.

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Synthesis Strategies for Rare Earth Activated Inorganic Phosphors: A Mini Review

Singh,

Siwach

et al. 2024

Applied Research

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Rare‐earth (RE)‐activated inorganic nanophosphors have garnered significant attention due to their unique optical properties and versatile applications in fields ranging from lighting and displays to biomedical imaging. The mini review provides a concise overview of recent advances in the synthesis strategies employed for the fabrication of these nanomaterials. Various synthesis techniques, including solid‐state, sol‐gel, solution combustion, hydrothermal, co‐precipitation, and microwave methods have been discussed, highlighting their advantages and limitations in tailoring the properties of nanophosphors. Furthermore, the role of different rare earth dopants and host matrices in controlling the luminescent properties of nanophosphors has been explored. Future perspectives and emerging trends in preparation of RE‐activated inorganic nanophosphors has also been discussed, with an emphasis on addressing current challenges and exploring new avenues for the fabrication of adequate and functional nanomaterials.

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Synthesis, structural and photoluminescence behaviour of novel La2SiO5:Eu3+/Tb3+ nanomaterials for UV-LEDs

Cited by 12 publications

References 34 publications

Concentration‐dependent luminescence characterization of terbium‐doped strontium aluminate nanophosphors

Concentration‐dependent luminescence characterization of terbium‐doped strontium aluminate nanophosphors

Tunable luminescence from Bi³⁺ sensitized La₂Zr₂O₇:Eu³⁺ red nanophosphors for display applications

Synthesis Strategies for Rare Earth Activated Inorganic Phosphors: A Mini Review

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Synthesis, structural and photoluminescence behaviour of novel La2SiO5:Eu3+/Tb3+ nanomaterials for UV-LEDs

Cited by 12 publications

References 34 publications

Concentration‐dependent luminescence characterization of terbium‐doped strontium aluminate nanophosphors

Concentration‐dependent luminescence characterization of terbium‐doped strontium aluminate nanophosphors

Tunable luminescence from Bi3+ sensitized La2Zr2O7:Eu3+ red nanophosphors for display applications

Synthesis Strategies for Rare Earth Activated Inorganic Phosphors: A Mini Review

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Product

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Tunable luminescence from Bi³⁺ sensitized La₂Zr₂O₇:Eu³⁺ red nanophosphors for display applications