Method for designing white light perovskite through strain regulation and control

The invention relates to a method for designing white light perovskite through strain regulation and control, belongs to the field of low-dimensional organic and inorganic perovskite white light emission, and solves the problem of exploring the origin of white light. The perovskite of cyclopropylamine (c-C3), cyclobutylamine (c-C4), cyclopentylamine (c-C5), cyclohexylamine (c-C6), isopropylamine (2-C3), sec-butylamine (2-C4), n-propylamine (1-C3) and n-butylamine (1-C4) is prepared through an anti-solvent method, a slow cooling crystallization method and the like. According to the present invention, with the increase of the ring size, the wide spectrum is enhanced and gradually subjected to red shift, the 2-C3 and 2-C4 with the large C-C (-NH2)-C angle still have the wide spectrum, and the 1-C3 and 1-C4 wide spectrum can be neglected; therefore, the amine with a (C-NH-C) or (C-N (-C)-C) structure is introduced, the strain degree is changed, the general synthesis strategy of the white perovskite is successfull