Structural, Judd-Ofelt, photoluminescence properties of Eu3+activated SrWO4 phosphors: Electronic, vibrational, elastic properties from ab initio study

Shruthi, D.L.; Reddy, A. Jagannatha; Kumar, G.N. Anil

doi:10.1016/j.optmat.2021.111243

Cited by 18 publications

(2 citation statements)

References 40 publications

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“…Interaction type is determined by θ value i.e. 3 (exchange interaction), 6 (dipole-dipole interaction), 8 (dipole-quadrupole interaction) and 10 (quadrupolequadrupole interaction) [21,22] .…”

Section: Photoluminescence (Pl) Propertiesmentioning

confidence: 99%

“…22 ≈ 6 for 595 nm emission wavelength at different excitations 260 nm and 395 nm. Above values indicate that concentration quenching effect is due to dipole -dipole interaction throughout the Eu 3+ ion in Mg 3 (PO 4 ) 2 phosphor.Substitution of Phosphate ions with molybdate, tungstate and sulfate ionsTo investigate the effect of molybdate, tungstate and sulfate ions in Mg 3 (PO 4 ) 2 :0.5mol%Eu 3+ phosphor, we replaced phosphate group with molybdate, tungstate and sulfate group.…”

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confidence: 96%

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Synthesis and luminescence properties of Eu3+-activated Mg3(PO4)2 phosphors and substitution of phosphate with Molybdate, Tungstate and Sulphate

Dhiman

Parauha²,

Chourasia

et al. 2023

Preprint

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In the present work, trivalent europium (Eu3+) ion activated Mg3(PO4)2 red phosphors have been synthesized through solid-state reaction method. X-ray diffraction (XRD) confirmed the successful formation of Mg3(PO4)2:Eu3+ phosphors with monoclinic phase (space group P21/c (14). The photoluminescence (PL) spectroscopy was used to record the excitation and emission spectrum of Eu3+ activated Mg3(PO4)2 phosphor. The resulting samples displayed the typical emissions of Eu3+ ions corresponding to the 5D0 → 7FJ transitions when excited at 395 nm. A 0.5 mol% Eu3 + ion doping concentration was found to be ideal. The best concentration of Eu3+ ions for doping was discovered to be 0.5 mol%. The CIE coordinates of Eu3+ activated Mg3(PO4)2 phosphor is calculated, which shows strong red emission. In addition, phosphate group replaced with molybdate, tungstate and sulfate group and found enhancement in emission intensity of prepared phosphors. The outcomes showed that the Eu3+-activated Mg3(PO4)2 phosphors are excellent red-emitting phosphors for use in white LEDs that are driven by near-ultraviolet light.

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Section: Photoluminescence (Pl) Propertiesmentioning

confidence: 99%

mentioning

confidence: 96%

Synthesis and luminescence properties of Eu3+-activated Mg3(PO4)2 phosphors and substitution of phosphate with Molybdate, Tungstate and Sulphate

Dhiman

Parauha²,

Chourasia

et al. 2023

Preprint

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Novel red colour emitting Ca_0.995Mg₂(SO₄)₃:0.5Eu²⁺ phosphor under ultraviolet, blue, and green excitation for plant growth LEDs

et al. 2022

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In the recent few years, Eu 2+ -and Mn 4+ -activated phosphors are widely used as potential colour converters for indoor plant cultivation lighting application due to their marvellous luminescence characteristics as well as low cost. In this investigation, we synthesized novel red colour-emitting Ca (2Àx) Mg 2 (SO 4 ) 3 :xmol% Eu 2+ (x = 0-1.0 mol%) phosphors via a solid-state reaction method in a reducing atmosphere. The photoluminescence (PL) excitation spectra of synthesized phosphors exhibited a broad excitation band with three excitation bands peaking at 349 nm, 494 nm, and 554 nm. Under these excitations, emission spectra exhibited a broad band in the red colour region at $634 nm. The PL emission intensity was measured for different concentrations of Eu 2+ . The maximum Eu 2+ doping concentration in the Ca 2 Mg 2 (SO 4 ) 3 host was observed for 0.5 mol%. According to Dexter theory, it was determined that dipole-dipole interaction was responsible for the concentration quenching. The luminous red colour emission of the sample was confirmed using Commission international de l'eclairage colour coordinates. The results of PL excitation and emission spectra of the prepared phosphors were well matched with excitation and emission wavelengths of phytochrome P R . Therefore, from the entire investigation and obtained results it was concluded that the synthesized Ca 0.995 Mg 2 (SO 4 ) 3 :0.5mol %Eu 2+ phosphor has huge potential for plant cultivation application.

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SrWO4: Er3+; an efficient green phosphor for LED and optical thermometry applications

Gopal

Manam

2022

J Mater Sci: Mater Electron

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Structural, Judd-Ofelt, photoluminescence properties of Eu3+activated SrWO4 phosphors: Electronic, vibrational, elastic properties from ab initio study

Cited by 18 publications

References 40 publications

Synthesis and luminescence properties of Eu3+-activated Mg3(PO4)2 phosphors and substitution of phosphate with Molybdate, Tungstate and Sulphate

Synthesis and luminescence properties of Eu3+-activated Mg3(PO4)2 phosphors and substitution of phosphate with Molybdate, Tungstate and Sulphate

Novel red colour emitting Ca_0.995Mg₂(SO₄)₃:0.5Eu²⁺ phosphor under ultraviolet, blue, and green excitation for plant growth LEDs

SrWO4: Er3+; an efficient green phosphor for LED and optical thermometry applications

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Structural, Judd-Ofelt, photoluminescence properties of Eu3+activated SrWO4 phosphors: Electronic, vibrational, elastic properties from ab initio study

Cited by 18 publications

References 40 publications

Synthesis and luminescence properties of Eu3+-activated Mg3(PO4)2 phosphors and substitution of phosphate with Molybdate, Tungstate and Sulphate

Synthesis and luminescence properties of Eu3+-activated Mg3(PO4)2 phosphors and substitution of phosphate with Molybdate, Tungstate and Sulphate

Novel red colour emitting Ca0.995Mg2(SO4)3:0.5Eu2+ phosphor under ultraviolet, blue, and green excitation for plant growth LEDs

SrWO4: Er3+; an efficient green phosphor for LED and optical thermometry applications

Contact Info

Product

Resources

About

Novel red colour emitting Ca_0.995Mg₂(SO₄)₃:0.5Eu²⁺ phosphor under ultraviolet, blue, and green excitation for plant growth LEDs