Schematic illustration of the comparison of the crystal structure inside the pristine perovskite film, D-p-FPhe-doped film, and D-p-FPhe-doped film with an applied magnetic field. (IMAGE)
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On the left side of the figure is the perovskite film prepared in three ways, in the middle is the enlarged internal crystal structure diagram, and on the right is the further enlarged interaction diagram between chiral molecules and perovskite. In the first row, irregular perovskite crystal films mixed with α and δ were produced due to large FA ions. In the second row, the passivation effect of doping chiral molecule D-p-FPhe resulted in the perovskite film without harmful δ phase but disordered. In the third row, the magnetic dipole moment between molecules and perovskites was enhanced by applying an external magnetic field, obtaining a uniformly ordered high-quality perovskite film.
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