The structural and spectral study of LiSrVO4:Tb3+ phosphor for UV-shifted imaging devices

Biswas, Pankaj; Kumar, Vinay; Kamni,

doi:10.1016/j.matpr.2019.12.342

Cited by 12 publications

(3 citation statements)

References 17 publications

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“…A smaller percentage difference between ionic radii enhances the site occupying probability. The percentage difference of ionic radii (D r ) can be estimated using the following equation [ 28 ] :

D_{r} goodbreak= \frac{R_{s} - R_{d}}{R_{s}}

where

R_{s}

is the respective ionic radii of the substituted ion, whereas

R_{d}

is the ionic radii of the dopant ion. The percentage difference of ionic radii was calculated to be 9.8, 8.0, and 130.0% for ions listed as Na + , Ca 2+ , and Si 4+ , respectively.…”

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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D_{r} goodbreak= \frac{R_{s} - R_{d}}{R_{s}}

where

R_{s}

is the respective ionic radii of the substituted ion, whereas

R_{d}

is the ionic radii of the dopant ion. The percentage difference of ionic radii was calculated to be 9.8, 8.0, and 130.0% for ions listed as Na + , Ca 2+ , and Si 4+ , respectively.…”

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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“…The material crystallinity was computed by calculating its Urbach energy. The absorption coefficient (α) and the Urbach energy were correlated by an empirical relationship [16,23]. The slope of the curve was obtained from Figure 5 and the reciprocal of the slope gave an Urbach energy of 136.4 meV.…”

Section: Optical Propertiesmentioning

confidence: 99%

Emission enhancement in the luminescence performance of warm red light‐emitting LiSrVO₄:Pr³⁺ phosphors

Mala,

Albert,

Princy

et al. 2024

Luminescence

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Warm red‐emitting praseodymium‐doped LiSrVO4 phosphors were synthesized via solid‐state reaction. The phase formation was verified using an X‐ray diffraction study and the morphology was investigated using a scanning electron microscope study. The LiSrVO4:Pr3+ phosphors emitted red light when exposed to ultraviolet light, indicating their possibility for use in warm white light‐emitting diodes (WLEDs). Furthermore, the effect of charge compensators on the luminescence characteristics was addressed. The decay time was investigated using time‐resolved photoluminescence. Furthermore, thermal quenching was analyzed through temperature‐dependent photoluminescence spectra. Their sensitivity was calculated using temperature‐dependent decay time analysis. The colour purity of the emitted light could be measured by photometric analysis. This comprehensive investigation provides a thorough understanding of the luminescence properties of phosphors for WLED applications.

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“…In addition to activating the LSV:0.015Eu 3+ nanoplate lattice and increasing the luminescence intensity, oxygen vacancies act as sensitizers for energy transfer to Eu 3+ ions. 82 When the concentration of Eu 3+ ions exceeds the optimum value, excessive oxygen vacancies are created, resulting in the loss of crystallinity and a decrease in luminescence. 83,84 The LSV:0.015Eu 3+ nanoplate emission peaks are shown in Fig.…”

Section: Optical Characterization Of Lisr (1−x) V:xeu 3+ Nanoplatesmentioning

confidence: 99%

A bacterial cellulose-based LiSrVO₄:Eu³⁺ nanosensor platform for smartphone sensing of levodopa and dopamine: point-of-care diagnosis of Parkinson's disease

Mahdavi¹,

Emadi²,

Nabavi³

2023

Nanoscale Adv.

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The structural and spectral study of LiSrVO4:Tb3+ phosphor for UV-shifted imaging devices

Cited by 12 publications

References 17 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

Emission enhancement in the luminescence performance of warm red light‐emitting LiSrVO₄:Pr³⁺ phosphors

A bacterial cellulose-based LiSrVO₄:Eu³⁺ nanosensor platform for smartphone sensing of levodopa and dopamine: point-of-care diagnosis of Parkinson's disease

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The structural and spectral study of LiSrVO4:Tb3+ phosphor for UV-shifted imaging devices

Cited by 12 publications

References 17 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

Emission enhancement in the luminescence performance of warm red light‐emitting LiSrVO4:Pr3+ phosphors

A bacterial cellulose-based LiSrVO4:Eu3+ nanosensor platform for smartphone sensing of levodopa and dopamine: point-of-care diagnosis of Parkinson's disease

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Product

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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

Emission enhancement in the luminescence performance of warm red light‐emitting LiSrVO₄:Pr³⁺ phosphors

A bacterial cellulose-based LiSrVO₄:Eu³⁺ nanosensor platform for smartphone sensing of levodopa and dopamine: point-of-care diagnosis of Parkinson's disease