• Lokeshwar Patel
• Manendra Mehta
• Rashmi Sharma

Abstract In the present work, Ce3+-activated GdPO4 phosphors were synthesized by the solid-state reaction method. The structural and morphological studies of the synthesized phosphors were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), and Fourier-transform infrared (FTIR) spectroscopy. The optical properties of the phosphors were investigated based on the photoluminescence excitation and emission spectra. The results showed that the photoluminescence excitation spectra of GdPO4:Ce3+ phosphors were recorded in the range of 300 to 500 nm excited at 512 nm. The PL excitation spectra have two peaks, one peak obtained at 335 nm and the second peak is the most intense peak obtained at 450 nm, which are attributed to the crystal field splitting of Ce3+ 4f→5d transition. The excitation peak at 335 nm is attributed to the 2F5/2→5D transition and also the peak at 450 nm belongs to 2F7/2→5D transitions. In addition to these, the PL emission spectra of these phosphors excited at 430 nm showed a broad emission peak around 557 nm, which is attributed to the transition from the 5d to the 4f energy level. Thus the above result indicates that both the strongest excitation and the strongest emission peak are associated with the lowest-lying 5d state, which is influenced by the crystal field and may be suitable candidates for photonic devices and biomedical applications.

GdPO4, solid state reaction method, EDX, FTIR.

"Structural and photoluminescence properties of ce3+ activated GdPO4 phosphors", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.9, Issue 10, page no.d34-d41, October-2022, Available :http://www.jetir.org/papers/JETIR2210315.pdf

"Structural and photoluminescence properties of ce3+ activated GdPO4 phosphors", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.9, Issue 10, page no. ppd34-d41, October-2022, Available at : http://www.jetir.org/papers/JETIR2210315.pdf