Luminescence properties of SrAl2O4: Tb3+/ Bi3+ nanophosphors for photonic applications

Jamalaiah, B.C.; Madhu, N.

doi:10.1016/j.molstruc.2019.127599

Cited by 11 publications

(5 citation statements)

References 27 publications

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“…AlO 4 tetrahedra in SrAl 2 O 4[31][32][33] and Sr 3 Al 2 O 6 , respectively[35],supporting the presence of both phases in the sample as indicated in XRD. Carbonate vibrations are indicated by peaks at 1392 and 1394 cm À1[34].…”

mentioning

confidence: 53%

“…The peak at 598 cm −1 found in the deconvoluted region corresponds to Tb–O bonds [38]. The peaks at 785 cm −1 and 1450 cm −1 are assigned to stretching vibration of AlO 4 tetrahedra in SrAl 2 O 4 [31–33] and Sr 3 Al 2 O 6 , respectively [35], supporting the presence of both phases in the sample as indicated in XRD. Carbonate vibrations are indicated by peaks at 1392 and 1394 cm −1 [34].…”

Section: Resultsmentioning

confidence: 86%

“…Shimadzu UV-2600 was used to record diffuse reflectance spectra (DRS) in the 200-800 nm range. Previous research has determined that Sr 2+ , Al 3+ and Tb 3+ ionic radii are 1.18, 0.535 and 0.92 Å, respectively [31]. According to the existing literature, it has been established that the permissible deviation in the percentage of host and dopant ions referred to as acceptable percentage difference (D r ) should not exceed 30% [32].…”

Section: Methodsmentioning

confidence: 99%

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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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mentioning

confidence: 53%

Section: Resultsmentioning

confidence: 86%

Section: Methodsmentioning

confidence: 99%

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

Thomas,

Safeera,

Vanchipurackal

et al. 2024

Luminescence

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“…7 F 5 (545 nm) and Tb 3þ : 5 D 3 ! 7 F 4 (438 nm) LAGBTbx phosphors are also found close to La 2 W 3 O 12 : 0.05Tb 3þ (0.299, 0.568), [41] SrLaAlO 4 :0.05Tb 3þ (0.297, 0.498), [42] SrAl 2 O 4 :5.0Tb 3þ (0.296, 0.478), [43] and SrAl 2 O 4 :5.0Tb 3þ / 3.0Bi 3þ (0.287, 0.607) [44] phosphors.…”

Section: Photoluminescence Analysismentioning

confidence: 64%

“…The location of CIE coordinates of LAGBTb x phosphors and the standard EBU green illuminant are illustrated in Figure . The CIE coordinates of LAGBTb x phosphors are also found close to La 2 W 3 O 12 :0.05Tb 3+ (0.299, 0.568), [ 41 ] SrLaAlO 4 :0.05Tb 3+ (0.297, 0.498), [ 42 ] SrAl 2 O 4 :5.0Tb 3+ (0.296, 0.478), [ 43 ] and SrAl 2 O 4 :5.0Tb 3+ /3.0Bi 3+ (0.287, 0.607) [ 44 ] phosphors.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Greenish‐Yellow Luminescence Properties of Li₆AlGd(BO₃)₄: Tb³⁺ Phosphors for Solid State Lighting

Netheti,

Jamalaiah,

Rasool

et al. 2023

Physica Status Solidi (a)

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The Li6AlGd(1−x)(BO3)4:xTb3+ (0 ≤ x ≤ 4.0 mol%) phosphors are fabricated via solid‐state reaction process. The structural investigations are carried out through powder X‐ray diffraction and Fourier transform infrared techniques. The morphology is examined using high‐resolution scanning electron microscope and transmission electron microscope. The temperature‐dependent luminescence properties are completed at 378 nm excitation. The photoluminescence excitation analysis is carried out by controlling the emission at 545 nm corresponding to Tb3+:5D4 → 7F5 transition. The suitable excitation wavelength is selected as 378 nm for efficient emission by studying the emission spectra at several excitation wavelengths. The emission spectra show two groups of emission bands through Tb3+:5D3 → 7FJ and Tb3+:5D4 → 7FJ transitions. The concentration‐dependent investigations reveal the optimum Tb3+ions concentration as 2.0 mol% for intense luminescence. Upon 378 nm excitation, they produce greenish‐yellow luminescence of color purity 60% with CIE color coordinates (0.286, 0.572) close to the standard European Broadcasting Union Green Illuminant and they found suitability in the design of solid‐state lighting devices.

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Luminescence Properties of Bi3+-doped Sr3B2O6

Pekgözlü

2023

J Appl Spectrosc

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Luminescence properties of SrAl2O4: Tb3+/ Bi3+ nanophosphors for photonic applications

Cited by 11 publications

References 27 publications

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

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

Synthesis and Greenish‐Yellow Luminescence Properties of Li₆AlGd(BO₃)₄: Tb³⁺ Phosphors for Solid State Lighting

Luminescence Properties of Bi3+-doped Sr3B2O6

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Luminescence properties of SrAl2O4: Tb3+/ Bi3+ nanophosphors for photonic applications

Cited by 11 publications

References 27 publications

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

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

Synthesis and Greenish‐Yellow Luminescence Properties of Li6AlGd(BO3)4: Tb3+ Phosphors for Solid State Lighting

Luminescence Properties of Bi3+-doped Sr3B2O6

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Synthesis and Greenish‐Yellow Luminescence Properties of Li₆AlGd(BO₃)₄: Tb³⁺ Phosphors for Solid State Lighting