Photoluminescence properties of LiTi2-xEux(PO4)3 phosphor

A solid-state reaction route-based LiTi2-xEux(PO4)(3) was phosphor synthesized for the first time to evaluate its luminescence performance by excitation, emission and lifetime () measurements. The LiTi2-xEux(PO4)(3) phosphor was excited at (exci.)=397nm to give an intense orange-red (597nm) emission attributed to the (D0F1)-D-5-F-7 magnetic dipole (J=+/- 1) transition and red (616nm) emission ((D0F2)-D-5-F-7), which is an electric dipole (J=+/- 2) transition of the Eu3+ ion. Beside this, excitation and emission spectra of host LiTi2(PO4)(3) powder were also reported. The effect of Eu3+ concentration on luminescence characteristics was explained from emission and lifetime profiles. Concentration quenching in the LiTi2-xEux(PO4)(3) phosphor was studied from the Dexter's model. Dipole-quadrupole interaction is found to be responsible for energy transfer among Eu3+ ions in the host lattice. The LiTi2-xEux(PO4)(3) phosphor displayed a reddish-orange colour realized from a CIE chromaticity diagram. We therefore suggest that this new phosphor could be used as an optical material of technological importance in the field of display devices. Copyright (c) 2016 John Wiley & Sons, Ltd.