Effect of Co-Doping of Charge Compensator Ions on the Photoluminescence Emission of Calcium Titanate Doped with Europium (III) Phosphor

Calcium Titanate doped with 1.5 mol% concentration of Europium (III) was prepared using solid - state reaction method. The trial to understand the effect of charge compensator ions in the emission spectrum was done. Li+, Na+ and K+ ions were considered in present case as co - dopants. Therefore, three samples of CaTiO3 doped with Eu3+ (1.5 mol%) and co - doped Li+, Na+ and K+ ions respectively were prepared. The sample doped with Eu3+ was characterized with an X - ray diffraction pattern. The pattern observed expressed good agreement with the standard XRD pattern card 96 - 101 - 1212 from the crystallographic open database. The said card was reported for CaTiO3 which followed the Cubic crystal system with space group Pm - 3 m (221). Fourier Transform Infrared spectrum of CaTiO3 doped with 1.5 mol% Eu3+ was recorded which supported the presence of Ti - O stretching and Ca - O. The FTIR spectrum Photoluminescence emission spectra were recorded for the prepared samples exhibited peaks centred at 590 nm and 617 nm and may be attributed to 5D0 7F1 and 5D0 7F2 respectively. It was observed that there wasn't a significant variation in the shape or the characteristics of the emission spectra whereas the intensity of photoluminescence emission increased. The relative increase in the intensity of the emission spectrum of Li+, Na+, K+ co - doped samples were 1.42, 1.62 and 1.78 when compared to Europium (III) doped Calcium Titanate.