EFFECT OF CALCINATION TEMPERATURE AND DOPING IONS CONCENTRATION ON OPTICAL PROPERTIES OF YPO4:Tb3+

Tóm tắt

The luminescent nanomaterial YPO₄:Tb was successfully synthesized using the combustion method. The crystal structure and optical properties were analyzed using X-ray diffraction (XRD), fluorescence excitation spectroscopy, emission spectroscopy, and lifetime measurements. The synthesized material was single-phase with a tetragonal crystal structure and an average particle size of 20 - 30 nm. Under 220 nm excitation, these materials exhibited strong blue emission corresponding to the ​ ⁵D₄ → ⁷F_J  transitions of Tb³⁺, with the ⁵D₄ → ⁷F₅​ transition being the most intense. The optimal synthesis temperature in laboratory conditions was from 800 to 900°C, with the best Tb³⁺ doping concentration at 7 mol%. The measured luminescence lifetime of the material was 363 μs.