Machinery & Energetics

The results of luminescent properties investigations of bismuth phosphate BiPO4 doped with Eu³⁺ and Pr³⁺ions are carried out. The possibility of application of the compounds studied as light sources for greenhouse cultivation of plants. It is found that in the cases of ВіРО4 doping with both Eu³⁺ and Pr³⁺ ions studied samples reveal intensive red luminescence at room temperature. Both emission and excitation spectra determined by transitions in rare-earth ions and in the same time no emission and corresponding excitation of phosphate host was not observed. Among all radiative transitions in case of Eu₃+ -doping lines of ⁵D₀→ ⁷ F₂ transition better fits to absorption spectra of chlorophyll. There is correlation between bands ³P₀→ ³H₆ and ³P₀→ ³ F₂ in case of Pr³⁺ ions with corresponding bands of chlorophyll a and chlorophyll b.

photoluminescence, bismuth phosphate, red luminophore, Eu3+, Pr3+