White-light-emission Afterglow Phosphor CaZnGe_2O_6:Dy^<3+>
A novel phosphor, CaZnGe<SUB>2</SUB>O<SUB>6</SUB>:Dy<SUP>3+</SUP>, which emits white long-lasting phosphorescence (LLP) upon UV excitation, is prepared by a conventional high-temperature solid-state method, and its luminescent properties are systematically reported in this letter. These phosphors are well crystallized by calcination at 1150 °C for 3 h and possess excellent performance. After irradiation under 240-nm UV light, CaZnGe<SUB>2</SUB>O<SUB>6</SUB>:2% Dy<SUP>3+</SUP> emits intense white emission with color coordinate values of <I>x</I>=0.36, <I>y</I>=0.39, and its afterglow can be seen with the naked eye in the dark clearly for more than 3 h after removal of the excitation source.
- Chemistry letters
Chemistry letters 37(2), 136-137, 2008-02-05
The Chemical Society of Japan