The present invention discloses a
boron phosphate near-
infrared second-region fluorescent material, its preparation method and application. The
chemical composition of the fluorescent material is Ba3BP 1‑x O7:xMn 5+ , where Mn 5+ is the activator, and x = 0.001 to 0.03 in the formula. The preparation method adopted in the present invention is the high-temperature
solid-
phase method. Weigh the Ba source, B source, P source, and Mn source according to the stoichiometric ratio. After mixing the raw materials evenly, sinter them at high temperature in an
air atmosphere, and naturally cool them to
room temperature to obtain the sintered product.
Grind it to obtain the
boron phosphate near-
infrared second-region fluorescent material. The fluorescent material of the present invention can be effectively excited by a commercial red LED
chip and form a narrow-band emission in the near-
infrared second region. This
boron phosphate near-infrared second-region fluorescent material has good physical and
chemical stability, is simple to prepare, does not require an oxidizing
atmosphere, and can form Mn 5+ in the air, and has a relatively low cost and is easy to be
mass-produced industrially.