abstract |
An organic-inorganic perovskite compound according to the present invention contains: monovalent amidinium cations, monovalent alkylammonium cations and divalent alkylenediammonium cations as organic cations; divalent metal ions and alkali metal ions having an ionic radius of 0.8 to 1.3 with respect to the ionic radius of the divalent metal ions, as inorganic cations; and halogen ions as inorganic anions. |