Phase transition and ionic conduction enhancement induced by co-doping of LiI and MnI 2 in a one-dimensional lead iodide perovskite.

Herein, we demonstrated the unique advantage of a mechanochemical reaction to prepare a salt with hard and soft acid and base ions concurrently by solution synthesis owing to the soft acid preferring to combine with the soft base and vice versa . We prepared Bu 4 N 1- x Li x Mn x Pb 1- x I 3 ( x = 0.011-0.14) by mechanochemical synthesis. The doping induced a structural phase transition at ∼342 K and much enhancement of ionic conduction above 342 K for all co-doped hybrids regarding Bu 4 NPbI 3 because of the voids around the Mn 2+ /Li + ions by doping.