Fluoride nanocrystal, preparation method and application thereof

The invention discloses a fluoride nanocrystal, a preparation method and application thereof, and relates to the technical field of high-energy ray detection and delayed imaging, the fluoride nanocrystal contains a hexagonal phase NaLuF4 main body structure, the chemical composition is Cs0. 02Na0. 98LuF4: Tb < 3 + >, and the fluoride nanocrystal is prepared by a thermal injection method and has the following characteristics that: the fluoride nanocrystal has a hexagonal phase NaLuF4 main body structure; the fluoride nanocrystal is used for preparing a transparent fluoride scintillation screen (flexible large-area scintillation screen) for X-ray delay imaging. The flexible large-area scintillation screen prepared by the invention has high luminous efficiency, high transparency, high imaging resolution, high stability and long-term information storage capability, and is expected to be applied to X-ray delay imaging so as to realize X-ray imaging visualization independent of dangerous radiation. 本发明公开了一种氟化物纳米晶体、