Green Emissions from Green-Colored Y[sub 2]BaMO[sub 5]:Tb (M=Cu, Zn) Materials as Inorganic Luminescent Pigments

Photoluminescence and coloring properties of -doped were investigated for developing an inorganic luminescent pigment. Powder samples were synthesized by three kinds of methods, namely, a simple solid-state reaction, a stepwise solid-state reaction, and a precipitation. obtained by the simple solid-state reaction showed green emissions under UV light irradiation. However, substitution of for to give the material a green color led to the quenching of the green emissions from . The distance between and was assumed to play a crucial role in luminescence behavior due to the occurrence of energy transfer in this system. We then changed the synthesis method from the conventional solid-state reaction to the precipitation method based on solution chemistry. In this latter method, green-colored, green-luminescent phosphors could be obtained successfully because the coloring ions and the emitting ions were separated in the particle.