Luminescence studies on lithium-calcium borophosphate glasses doped with Fe2+, Ni2+ and Zn2+ ions

Luminescence material is a solid which converts certain types of energy into electromagnetic radiation over and above thermal radiation. Due to the limited studies on luminescence properties of the transition metal ion doped glass, this present study aiming to understand further the effect of doping different transition metal ions to the luminescence properties. This paper report on the luminescence properties of 25Li₂CO₃-25Ca₂CO₃-30B₂O₃-20P₂O₅ glasses doped with 1 mol % of different transition metal ions (Fe, Ni, and Zn) which had been prepared by melt quenching technique. The luminescence properties were analyzed based on emission spectra obtained from the photoluminescence spectroscopy. The luminescence spectra of 25Li₂CO₃-25Ca₂O₃-25CA₂O₃-30B₂O₃-20P₂O₅: Fe2+ consists of three band regions in the range from 272 to 489 nm, 516 to 689 nm and 754 to 861 nm. It exhibits indigo emission band which is centered at 430 nm and this band has been assigned to the transition of z8Dº3/2º--> z6Dº3/2. While for the luminescence spectra of 25Li₂CO₃-25Ca₂CO₃-30B₂O₃-20P₂O₅: Ni²⁺, it exhibits a strong orange emission band centered at 580 nm and this band has been assigned to the transition of 2Pº1/2-->4F9/2. Lastly, for the luminescence spectra of 25Li₂Co₃-25Ca₂CO₃-30B₂O3₃20P₂O₅: Zn2+, it exhibits a strong indigo emission band at 433 nm ad this has been assigned to the transition of 2S1/2-->2D3/2.