Characterization of Luminescent Li3Ba2Gd3Mo8O32:Tb3+ Phosphors Prepared via Sol–Gel Method

Luminescent Li 3 Ba 2 Gd 3 Mo 8 O 32 :Tb 3+ phosphors were synthesized using the sol–gel method, and extensively characterized through various spectroscopic techniques, including x-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier-transform infrared (FT-IR) spectroscopy, photolumine...

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Veröffentlicht in:Journal of electronic materials 2024-07, Vol.53 (7), p.3723-3732
Hauptverfasser: Singh, Vijay, Rao, B. R. V., Bhat, Aadil Ahmad, Devi, Ch. B. Annapurna, Rao, A. S., Joo, Ji Bong
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Sprache:eng
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Zusammenfassung:Luminescent Li 3 Ba 2 Gd 3 Mo 8 O 32 :Tb 3+ phosphors were synthesized using the sol–gel method, and extensively characterized through various spectroscopic techniques, including x-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier-transform infrared (FT-IR) spectroscopy, photoluminescence (PL) excitation, and emission. SEM micrographs revealed the irregular and non-uniform morphology and size of the prepared phosphors. The FT-IR spectra offered insights into the functional groups and bonding within the phosphor. The PL excitation spectra at a 545 nm emission wavelength displayed a slight shift in peak positions with a prominent peak at 283 nm, corresponding to the characteristic 4f 8  → 4f 7 5d 1 transitions of Tb 3+ ions, while under excitation at λ exc  = 283 nm, PL emission spectra exhibited distinct peaks associated with 5 D 4  →  7 F j ( j  = 6, 5, 4, 3) transitions. Notably, the transition 5 D 4  →  7 F 5 at 545 nm demonstrated strong and particularly high intensity in the Li 3 Ba 2 Gd 3 Mo 8 O 32 :0.09Tb 3+ phosphor. Photometric analysis showed the potential of this phosphor to serve as a vivid green light source for various display applications. The Li 3 Ba 2 Gd 3 Mo 8 O 32 :Tb 3+ phosphor may be used for creating sensors for environmental monitoring. Future research could explore its biocompatibility for biomedical applications and improve its targeting and photostability.
ISSN:0361-5235
1543-186X
DOI:10.1007/s11664-024-11144-3