Perpendicularly oriented 2D perovskite thin films prepared using the bar-coating method and DMSO additive.

A 2D perovskite incorporating an amine moiety with a carboxy group exhibited orientation changes as the amount of DMSO additive varied. The degree of perpendicular orientation was increased by optimizing the amount of DMSO additive, while using the bar-coating method. Moreover, film thickness and the ratio of perpendicular orientation exhibited a positive correlation. [ABSTRACT FROM AUTHOR]