Synthesis of New RE(3+) Doped Li(1+x)Ta(1−x)Ti(x)O(3) (RE: Eu, Sm, Er, Tm, and Dy) Phosphors with Various Emission Colors

New phosphors with various emission colors for RE(3+) doped Li(1+x)Ta(1−x)Ti(x)O(3) (LTT) (RE: Eu, Sm, Er, Tm, and Dy) were synthesized by electric furnace at 1423 K for 15 h. The microstructure of the host material and the photoluminescence (PL) property were determined and compared to those of RE(3+) doped Li(1+x)Nb(1−x)Ti(x)O(3) (LNT)(.) In the LTT phosphor, the highest PL intensity was achieved for the mixture composition Li(1.11)Ta(0.89)Ti(0.11)O(3) with a LiTaO(3) structure, although it has an M-phase superstructure. In the LTT host material, the effective activators were Eu(3+) and Sm(3+) ions, in contrast to the LNT host material. Here, we discuss the relationship between PL property and the host material’s structure.