| abstract |
The present application discloses an ammonium salt, including ammonium ion and halogen element anion; the chemical formula of the ammonium salt is shown in at least one of formula A, formula B, formula C, and formula D. and a perovskite material prepared from the ammonium salt. The material has good stability, good ultraviolet anti-aging effect, high absorption coefficient and good film-forming property, and the preparation method can be prepared and applied on a large scale. |