Novel single-component CaLaAlO4:Tb3+, Eu3+ phosphor for white light-emission

Mendhe, M.S.; Puppalwar, S. P.; Dhoble, S.J.

doi:10.1016/j.optmat.2018.05.037

Cited by 24 publications

(6 citation statements)

References 40 publications

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“…Emission spectra consist of emissions from the ground state 5 D 0 to the excited state 7 F 2. Emission curve shape did not vary with concentration because most valence electrons in trivalent rare‐earth elements are shielded by the 5s and 5p outer electrons. According to Judd–Ofelt theory, the electric dipole transition 5 D 0 → 7 F 2 is hypersensitive, and emission intensity is strongly influenced by ligand ions in the crystals.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and luminescence study of Eu³⁺‐doped SrYAl₃O₇ phosphor

Kadam

Dhoble

2019

Luminescence

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Rare-earth ions play an important role in eco-friendly solid-state lighting for the lighting industry. In the present study we were interested in Eu 3+ ion-doped inorganic phosphors for near ultraviolet (UV) excited light-emitting diode (LED) applications.Eu 3+ ion-activated SrYAl 3 O 7 phosphors were prepared using a solution combustion route at 550°C. Photoluminescence characterization of SrYAl 3 O 7 :Eu 3+ phosphors showed a 612 nm emission peak in the red region of the spectrum due to the 5 D 0 → 7 F 2 transition of Eu 3+ ions under excitation at 395 nm in the near-UV region and at the 466 nm blue excitation wavelength. These red and blue emissions are supported for white light generation for LED lighting. Structure, bonding between each element of the sample and morphology of the sample were analysed using X-ray diffraction (XRD) and scanning electron microscopy (SEM), which showed that the samples were crystallized in a well known structure. The phosphor was irradiated with a 60 Co-γ (gamma) source at a dose rate of 7.2 kGy/h. Thermoluminescence (TL) studies of these Eu 3+ -doped SrYAl 3 O 7 phosphors were performed using a Nucleonix TL 1009I TL reader. Trapping parameters of this phosphor such as activation energy (E), order of kinetics (b) and frequency factor (s) were calculated using Chen's peak shape method, the initial rise method and Ilich's method.

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Section: Resultsmentioning

confidence: 99%

Synthesis and luminescence study of Eu³⁺‐doped SrYAl₃O₇ phosphor

Kadam

Dhoble

2019

Luminescence

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“…x , Na + y (x = 0.00, 0.01, 0.02, 0.03, y = 0.00, 0.01, 0.02, 0.03) phosphors fall into the nearly white light region in the CIE diagram, which makes it suitable for the fabrication of white light emitting LEDs [28,29].…”

Section: Discussion On the Tunable Emissionsmentioning

confidence: 99%

Optimization of LaPO₄:Bi³⁺ Single-Phased White-Emitting Phosphor Luminescence Properties by Li⁺/Na⁺ Doping

Deng

Zhang

2019

International Journal of Optics

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LaPO4:Bi3+ single-phased white-emitting phosphors doped with both Li+/Na+ ions were successfully prepared by a conventional solid-state reaction technique. Microstructures were analyzed by both X-ray diffraction and high-resolution scanning electron microscopy experiments. Under the excitation of 335 nm, the La0.97PO4:Bi3+0.03 phosphor showed four emission bands with maxima at 460 nm, 487 nm (blue), 530 nm (yellow), and 637 nm (red); these can be successfully combined to form pure white light in a single host lattice only by simple activator Bi3+ ion. It was found that changing the concentration of dopant (Li+, Na+ ions) did not produce a change in shape or location of the emission peaks, but the value of the emission intensity increased; this was particularly evident in the red emission, which could optimize the white light emitting performance of the phosphors. When the Na+ doping concentration was 0.02, the CIE chromaticity coordinate of phosphor La0.95PO4:Bi3+0.03, Na+0.02 was (0.3008, 0.3203), close to that of the standard white light.

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“…It is clear from the preceding emission spectra that selfactivated emissions of blue light from lanthanum phosphate, orange light from Eu 3+ emission, and green light from Tb 3+ characteristic emission are combined when ultraviolet excitation is used. White light can be created when the emission intensities of several components match in the right proportion [32,33].…”

Section: Excitation and Emission Spectra Of Microspheres With Differe...mentioning

confidence: 99%

Rare earth Eu³⁺/Tb³⁺‐doped hollow microspheres (LaPO₄) and core‐shell nanocomposite luminescent materials with different transmittance (SiO₂@LaPO₄ Eu³⁺) preparation and research on luminescence performance

Wang

Namila

2023

Luminescence

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For the manufacture of hollow nanospheres that had different shapes, three distinct templates—urea, carbon microspheres, and polyethylene glycol 20000—were used. The relationship between microspheres with various hollow structures and their luminescent properties, as well as the effects of annealing temperature and the proportion of rare earth Eu3+/Tb3+ions in the reaction, were investigated using the structural characteristics of the microspheres and fluorescent materials, and the fluorescent materials were wrapped on the outer surface of the microspheres. Find the ideal balance between the best structure and superior luminescent performance, and then create reasonably good white light.

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Novel single-component CaLaAlO4:Tb3+, Eu3+ phosphor for white light-emission

Cited by 24 publications

References 40 publications

Synthesis and luminescence study of Eu³⁺‐doped SrYAl₃O₇ phosphor

Synthesis and luminescence study of Eu³⁺‐doped SrYAl₃O₇ phosphor

Optimization of LaPO₄:Bi³⁺ Single-Phased White-Emitting Phosphor Luminescence Properties by Li⁺/Na⁺ Doping

Rare earth Eu³⁺/Tb³⁺‐doped hollow microspheres (LaPO₄) and core‐shell nanocomposite luminescent materials with different transmittance (SiO₂@LaPO₄ Eu³⁺) preparation and research on luminescence performance

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Novel single-component CaLaAlO4:Tb3+, Eu3+ phosphor for white light-emission

Cited by 24 publications

References 40 publications

Synthesis and luminescence study of Eu3+‐doped SrYAl3O7 phosphor

Synthesis and luminescence study of Eu3+‐doped SrYAl3O7 phosphor

Optimization of LaPO4:Bi3+ Single-Phased White-Emitting Phosphor Luminescence Properties by Li+/Na+ Doping

Rare earth Eu3+/Tb3+‐doped hollow microspheres (LaPO4) and core‐shell nanocomposite luminescent materials with different transmittance (SiO2@LaPO4 Eu3+) preparation and research on luminescence performance

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Synthesis and luminescence study of Eu³⁺‐doped SrYAl₃O₇ phosphor

Synthesis and luminescence study of Eu³⁺‐doped SrYAl₃O₇ phosphor

Optimization of LaPO₄:Bi³⁺ Single-Phased White-Emitting Phosphor Luminescence Properties by Li⁺/Na⁺ Doping

Rare earth Eu³⁺/Tb³⁺‐doped hollow microspheres (LaPO₄) and core‐shell nanocomposite luminescent materials with different transmittance (SiO₂@LaPO₄ Eu³⁺) preparation and research on luminescence performance