Thermally Stimulated Luminescence Properties of Dy-doped CaYAl3O7 Single Crystals

In this study, we prepared CaYAl 3 O 7 single crystals doped with 0.1, 0.5, and 1.0% Dy by the floating zone method, and investigated their photoluminescence (PL) and thermally stimulated luminescence (TSL) properties.All samples showed the luminescence of Dy 3+ at approximately 480, 570, 660, 750, and 830 nm in PL, and PL quantum yields (QYs) were 3.9-45%.TSL glow curve measurements showed peaks at about 70 and 250 for the 0.1 and 0.5% Dy-doped samples, while the 1.0% Dy-doped sample had a peak only at around 70 .The 0.5% Dy-doped sample indicated the highest TSL intensity among all samples and linearity in the 1-1000 mGy range.The lower detection limit of the 0.5% Dy-doped sample was 1 mGy.