• S. R. Jaiswal
• N. S. Sawala
• P. A. Nagpure
• S. K. Omanwar

The luminescence phosphor GdPO4:Tb3+ with a single-phase monoclinic crystal structure has been successfully synthesized via the co-precipitation method by varying molar concentration of Tb3+ ions. Gadolinium phosphate singly doped terbium compound was first time reported with the co-precipitation method. This paper explores the photoluminescence properties of Gd (1-x) PO4: x%Tb3+ under VUV excitation. The energy transfer process between host matrix (GdPO4) and dopant (Tb3+) was investigated successfully. The extreme quantum efficiencies were found to be 168 and 163 %, under the VUV excitation of 205 and 155 nm respectively. The emission of green color (λ = 543 nm) was observed under the excitation of 147 and 172 nm. Therefore, this compound may be a potential candidate for mercury-free fluorescent lighting (MFFL) application.

Quantum Cutting (QC), Vacuum Ultraviolet (VUV), Quantum Efficiency (QE), Mercury Free Fluorescent Lamps (MFFL).

"VUV Photoluminescence properties of quantum harvester GdPO4: Tb3+", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.9, Issue 5, page no.75-81, May-2022, Available :http://www.jetir.org/papers/JETIRFO06015.pdf

"VUV Photoluminescence properties of quantum harvester GdPO4: Tb3+", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.9, Issue 5, page no. pp75-81, May-2022, Available at : http://www.jetir.org/papers/JETIRFO06015.pdf