Effects of X-ray irradiation on the luminescent properties of Eu-doped LiSrPO4 phosphors produced using the sol-gel method with glucose

Eu-doped LiSrPO4 (LSPO) phosphors were prepared using a sol-gel method, both with and without a chelating agent (glucose), and the effects of X-ray irradiation on the luminescence properties were investigated. The phase formation was carried out using X-ray diffraction (XRD). Optical properties such as photoluminescence (PL), spectroscopy excitation and emission, radioluminescence (RL) and photoluminescence emission after X-ray irradiated samples were examined. The results show that the sol-gel route without a chelating agent or the use of glucose is a reliable method for the synthesis of Eu-doped LSPO phosphors. The results also demonstrated an improvement in the luminescence for the sample produced without glucose. The PL and RL spectra showed different behavior; this behavior was connected to the X-ray absorption/reduction process of the Eu ions.