Photoluminescence and beta-ray irradiation induced thermoluminescence of Er(III) doped tungstate double perovskite

A luminescent double perovskite Ca3WO6 3 WO 6 doped with Er3+ 3 + was successfully synthesized via traditional solid-state reaction. Structural analysis was performed through X-ray diffraction (XRD) patterns utilizing Rietveld refinement. When excited at 380 nm, the Ca3WO6:Er3+ 3 WO 6 :Er 3 + phosphors displayed green spectral emission, corresponds to 2 H 11/2 , 4 S 3/2 to 4I15/2 I 15/2 transitions of Er3+. 3 + . The influence of Er3+ 3 + concentrations on photoluminescence (PL) intensity and concentration quenching was discussed, ascribing multipolar interaction as a cause of intensity quenching. The temperature-dependent PL analysis revealed the phosphor's excellent thermal stability, retaining approximately 79.6 % of its PL intensity at 150 degrees C. Furthermore, the Ca3WO6:Er3+ 3 WO 6 :Er 3 + phosphors exhibited high- quality thermoluminescence (TL) after beta irradiation. The impact of Er3+ 3 + concentrations and beta dose on TL intensity was investigated comprehensively. The reproducibility of the phosphor was checked after several TL readouts. The various heating rate (VHR) experiments were conducted to examine the effect of HR and to determine the trapping parameters.