Collective optical, ftir, and photoluminescence spectra of CeO 2 and/or Sm 2 O 3 -Doped Na 2 O-ZnO-P 2 O 5 Glasses

Abstract

Glasses with the Na 2 O-ZnO-P 2 O 5 composition and doped with single CeO 2 , Sm 2 O 3 , or mixed dopants were melted and studied. Collective optical, photoluminescence, and FT-infrared spectral studies were carried out. CeO 2 -doped glasses show two extra UV absorption bands due to Ce 4+ and Ce 3+ ions while Sm 2 O 3 -doped samples reveal pronounced peaks collected into two segments from 367 to 472 nm and from 950 to 1623 nm which are characteristic of absorption from Sm 3+ ions. The mixed dopants glasses show combined UV-visible-near-IR absorption peaks due to cerium (Ce 4+ , Ce 3+ ) ions and samarium (Sm 3+ ) ions. The photoluminescence spectra (PL) of the single CeO 2 -doped and Sm 2 O 3 -doped glasses and even the mixed dopant sample reveal luminescence spectra after excitation which are characteristic of the rare-earth ions. The intensities for both excited or emitted peaks are found to increase with the increase of the rare-earth percent. FTIR spectra of the glasses show pronounced vibrational peaks related to phosphate groups (Q 2 and Q 3 units) in accordance with the P 2 O 5 percent (70 mol %).