Near-infrared fluorescent powder and light emitting device containing the fluorescent powder

摘要

TECHNICAL FIELD The present invention belongs to the field of luminescent materials, and more particularly, relates to a near infrared fluorescent powder, and further discloses a manufacturing method thereof and a light emitting device containing the fluorescent powder. The near infrared fluorescent powders wherein the compound comprises an inorganic compound configuration dietary A _x R _p O _r of this invention is a A _x R _p O _r structure as a substrate, to blend certain of the rare earth ions or transition metal ions Through, the excitation peak of the prepared fluorescent powder is located at 350 to 750 nm, realizes wide emission under excitation of ultraviolet light, blu ray or red light, and the emission main peak is located at 700 to 1600 nm. By forming a solid solution through ion replacement and the like, and by the influence of crystal electric field fragmentation, it is possible to prepare near-infrared fluorescent powder materials of different emission wavelengths, improve the emission intensity of the fluorescent powder, as well as control the spectrum's controllability. It has been realized, and its application range has been further expanded.