• Venkata Reddy. G. N.

This study investigates the synthesis, structural characterization, optical properties, and multifunctional applications of terbium (Tb)-doped calcium fluoride (CaF₂) nanomaterials synthesized via the low-temperature solution combustion method. The influence of Tb doping (1–9 mol%) on phase composition, crystallinity, and electronic structure was examined through X-ray diffraction (XRD), revealing a stable cubic fluorite structure with lattice strain modifications. Scanning electron microscopy (SEM) coupled with energy-dispersive X-ray spectroscopy (EDAX) confirmed uniform nanoparticle dispersion and successful Tb incorporation. Optical properties were analyzed using UV-visible spectroscopy, indicating band gap modulation due to Tb doping, and photoluminescence (PL) studies revealed intense green emission (~545 nm) corresponding to the ⁵D₄ → ⁷F₅ transition of Tb³⁺ ions, making these materials suitable for LED applications. Gamma irradiation studies demonstrated enhanced defect formation and tunable optical properties, further optimizing their luminescent efficiency. Additionally, dielectric studies, including AC and DC conductivity measurements, revealed thermally activated conduction mechanisms and increased charge carrier mobility, suggesting potential applications in high-frequency electronic devices and energy storage systems. The combined results establish Tb-doped CaF₂ nanomaterials as promising candidates for nextgeneration optoelectronic, photonic, and dielectric applications.

Tb:CaF₂, XRD) analysis, SEM-EDAX, UV-visible spectroscopy, Fourier transform infrared (FT-IR) spectroscopy, photoluminescence (PL) studies, light-emitting diode (LED) applications

"LED and Dielectric Applications of (1 to 9 mol%) Tb Doped CaF2 nanomaterials", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.1, Issue 6, page no.863-875, November-2014, Available :http://www.jetir.org/papers/JETIR1701D74.pdf

"LED and Dielectric Applications of (1 to 9 mol%) Tb Doped CaF2 nanomaterials", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.1, Issue 6, page no. pp863-875, November-2014, Available at : http://www.jetir.org/papers/JETIR1701D74.pdf