Structural and photoluminescence properties of a novel green emitting Tb3+ doped Ba3La2 (BO3)4 phosphor

Peddaiah, M.; Ankoji, P.; Rudramadevi, B. Hemalatha

doi:10.1016/j.matpr.2020.07.345

Cited by 6 publications

(2 citation statements)

References 26 publications

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“…The optimized phosphor (9.0 mol% Tb 3+ ‐doped NCMS) CIE coordinates under UV and n‐UV excitation wavelengths are located near to the European broadcasting union illuminant green phosphor coordinates (0.29, 0.60). [ 54 ] The CIE coordinates reflect the pure green emission colour under the 378 nm excitation wavelength, whereas , colour tunability from the blue to green region was observed under 232 nm with increasing concentration of Tb 3+ ions in the Na 4 Ca 4 Si 6 O 18 phosphor. Therefore, the observed colour tunability in the NCMS:Tb 3+ phosphor under efficient UV chip excitation may be useful for lighting and display device applications.…”

Section: Resultsmentioning

confidence: 99%

UV‐excited blue‐ to green‐emitting Tb³⁺‐activated sodium calcium metasilicate colour tunable phosphor for luminescence devices

Chauhan

Jayasimhadri

2022

Luminescence

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Tb3+‐doped Na4Ca4Si6O18 (NCMS:Tb3+) phosphors were synthesized using a solid‐state reaction route with increasing dopant concentration. The phase identification studies for NCMS:Tb3+ phosphors were carried out using an X‐ray diffraction (XRD) technique. The XRD patterns for the as‐synthesized phosphors showed satisfactory agreement with the standard pattern (JCPDS card no. 75‐1687) for the pure phase of the Na4Ca4Si6O18 compound. The morphology and size of particles were illustrated from scanning electron microscope (SEM) micrographs. The photoluminescence excitation (PLE) spectrum of Tb3+‐doped Na4Ca4Si6O18 phosphor depicts the strong excitation peak obtained in the UV spectral region. The trivalent terbium‐activated NCMS phosphors excited in the UV region (232 nm wavelength) exhibited intense emission in the blue (350–470) and green (470–650) spectral regions. When increasing the concentration of Tb3+ ions in the host matrix, the emission colour shifted from the blue to the green region due to cross‐relaxation energy transfer (CRET) mechanisms and showed the tunable behaviour of the Tb3+‐activated as‐synthesized NCMS phosphor. These results demonstrated that the Tb3+‐activated sodium calcium metasilicate phosphor has immense potential to contribute as a green‐ and blue–green‐emitting component in lighting and display device applications.

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Section: Resultsmentioning

confidence: 99%

UV‐excited blue‐ to green‐emitting Tb³⁺‐activated sodium calcium metasilicate colour tunable phosphor for luminescence devices

Chauhan

Jayasimhadri

2022

Luminescence

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“…[ 17 ] All the absorption bands in the region of 600–800 cm −1 are attributed to B–O–B bending vibrations between the borate network. [ 18,19 ] In addition, other bands at 2347 cm −1 and 3850 cm −1 were also observed, due to the O–H stretching vibration related to moisture in the sample. [ 20 ]…”

Section: Resultsmentioning

confidence: 99%

Synthesis and novel emission properties of Bi³⁺‐doped Ca₂BO₃Cl phosphor for plant cultivation

et al. 2022

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In the present work, a series of Bi 3+ -activated Ca 2 BO 3 Cl phosphors was synthesized using the conventional high-temperature solid-state reaction method. The crystal structure of the prepared sample was determined to be monoclinic with space group P21/c. Scanning electron microscopy (SEM) analysis demonstrated the surface morphology with aggregated particles and sizes in the nano range.The presence of vibrational features and their luminescence characteristics were studied using Fourier transform infrared spectroscopy and photoluminescence (PL) techniques, respectively. At the 486 nm excitation wavelength, the PL spectrum revealed a sharp emission centred at 732 nm that was attributed to the 3 P 1 ! 1 S 0 transition of Bi 3+ . The emission spectra exhibited the highest emission intensity at 0.5 mol% Bi 3+ ion concentration, beyond this the emission intensity decreased due to the concentration quenching phenomenon attributed to multipolar interaction. The Commission Internationale de l'éclairage coordinates located at (0.7347, 0.2653) confirmed emission in the deep-red region with a colour purity of 99.98%. The obtained outcomes suggested that the reported material may be a promising candidate as a red-emitting phosphor for w-LEDs and plant growth applications.

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Spectroscopic investigation by incorporation of charge compensator ions in CaBaSiO4: Dy3+ phosphors for solid-state lighting applications

Banjare,

Bisen,

Brahme

et al. 2024

Indian J Phys

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Structural and photoluminescence properties of a novel green emitting Tb3+ doped Ba3La2 (BO3)4 phosphor

Cited by 6 publications

References 26 publications

UV‐excited blue‐ to green‐emitting Tb³⁺‐activated sodium calcium metasilicate colour tunable phosphor for luminescence devices

UV‐excited blue‐ to green‐emitting Tb³⁺‐activated sodium calcium metasilicate colour tunable phosphor for luminescence devices

Synthesis and novel emission properties of Bi³⁺‐doped Ca₂BO₃Cl phosphor for plant cultivation

Spectroscopic investigation by incorporation of charge compensator ions in CaBaSiO4: Dy3+ phosphors for solid-state lighting applications

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Structural and photoluminescence properties of a novel green emitting Tb3+ doped Ba3La2 (BO3)4 phosphor

Cited by 6 publications

References 26 publications

UV‐excited blue‐ to green‐emitting Tb3+‐activated sodium calcium metasilicate colour tunable phosphor for luminescence devices

UV‐excited blue‐ to green‐emitting Tb3+‐activated sodium calcium metasilicate colour tunable phosphor for luminescence devices

Synthesis and novel emission properties of Bi3+‐doped Ca2BO3Cl phosphor for plant cultivation

Spectroscopic investigation by incorporation of charge compensator ions in CaBaSiO4: Dy3+ phosphors for solid-state lighting applications

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UV‐excited blue‐ to green‐emitting Tb³⁺‐activated sodium calcium metasilicate colour tunable phosphor for luminescence devices

UV‐excited blue‐ to green‐emitting Tb³⁺‐activated sodium calcium metasilicate colour tunable phosphor for luminescence devices

Synthesis and novel emission properties of Bi³⁺‐doped Ca₂BO₃Cl phosphor for plant cultivation