• Dr.Anuradha Poddar

Luminescence of Cu+ and Mn2+ in NaMgF3 and NaMgCl3 Halo-phosphors by three different synthesis routes viz. wet chemical synthesis (WCS), solid state diffusion (SSD) and centrifuge (CS) methods, in the same atmospheric conditions are studied. Formation of compound was confirmed by taking XRDs of the samples and matched with the standered JCPDs showing the successful synthesis by different simple routes. PL emission and excitation spectra of NaMgF3 and NaMgCl3 when doped by Cu or Mn showed similar spectra when synthesized by different routes, moreover Pl remains at the same position (wavelengths) even if halogen atom in the compound (i.e. F by Cl ) is replaced. Photo-excited luminescence from Cu-doped halophosphor showed PL emission spectra of NaMgF3: Cu+ and NaMgCl3: Cu+ in the ultraviolet region due to 3d94s ↔ 3d10 transition. NaMgF3: Mn2+ and NaMgCl3: Mn2+ emission is placed in orange region (597 nm) for mercury free excitation of 380 nm due to 4F9/2→ 6H13/2 transition. Our emphasis is not only on the characterization of the samples but on the method of synthesis of the phosphors by simple routes. All the synthesis routes are easy, worked at low temperature, low cost and least hazardous and eco friendly.

Synthesis route; luminescence; phosphor; spectroscopy; wet chemical; Solid state diffusion; centrifuge route

"Photoluminescence Characteristics of Cu+ and Mn2+ in Activated Halosulphate Phosphor", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.8, Issue 6, page no.b704-b710, June-2021, Available :http://www.jetir.org/papers/JETIR2106240.pdf

"Photoluminescence Characteristics of Cu+ and Mn2+ in Activated Halosulphate Phosphor", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.8, Issue 6, page no. ppb704-b710, June-2021, Available at : http://www.jetir.org/papers/JETIR2106240.pdf