A solid-state reaction route-based LiTi2 - x Eux (PO4 )3 was phosphor synthesized for the first time to evaluate its luminescence performance by excitation, emission and lifetime (τ) measurements. The LiTi2 - x Eux (PO4 )3 phosphor was excited at λexci.  = 397 nm to give an intense orange-red (597 nm) emission attributed to the 5 D0  → 7 F1 magnetic dipole (ΔJ = ±1) transition and red (616 nm) emission (5 D0  → 7 F2 ), which is an electric dipole (ΔJ = ±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 - x Eux (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 - x Eux (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 © 2016 John Wiley & Sons, Ltd.

作者：R, Ramaraghavulu；V, Naresh；V, Eswaraiah

来源：Luminescence : the journal of biological and chemical luminescence 2016 年