The invention discloses an inorganic
perovskite material, a preparation method thereof and an LED device. The preparation method comprises the following steps that: S1, a
tin source and a
bismuth source are dissolved in a first
solvent to obtain a first solution, and a cesium source is dissolved in a second
solvent to obtain a second solution, wherein the
tin source is a stannous compound, the cesium source, the
tin source and the
bismuth source are
chlorine sources, and / or the first
solvent and the second solvent are
chlorine sources; and S2, the first solution and the second solution are mixed, stirring and heating reaction is performed, and then
solid-liquid separation, washing and
drying are performed. The preparation raw materials are low in cost, safe and non-toxic, the synthesis operation is simple, crystals can be obtained through a heating reaction, the
equipment requirement is low, the reaction condition requirement is loose, the product
crystallinity is good, particles are uniform, the
fluorescence yield is high, and the obtained product inorganic
perovskite material does not contain organic groups, is high in light stability and
heat stability, has potential application value in preparation of high-
fluorescence-yield
blue light fluorescent
powder, and can be further applied to preparation of LED devices.