Extraction-Pyrolysis Synthesis and Luminescence Properties of Lanthanum–Cerium Phosphates Activated by Terbium

A method for producing lanthanum–cerium phosphates activated by terbium of the compositions La 0.8 Ce 0.15 Tb 0.05 PO 4 and La 0.8 Ce 0.15 Tb 0.05 (PO 3 ) 3 has been suggested. The main advantage of this method in comparison with those that are already known is a decrease in temperature and process time. Luminophores demonstrated an intensive green luminescence in the range 450–620 nm. It has been determined that the intensity of luminescence of the Tb 3+ ion in the presence of La 3+ and Ce 3+ ions increases significantly in comparison with simple terbium phosphates in the compounds, which indicates an increase in the transfer of the excitation energy to the Tb 3+ ion in the presence of activators.