Formation of intermediate-phase free ultrasmooth quasi-two-dimensional perovskite films for high quality lasers
Ultrasmooth solution-processable quasi-2D perovskite thin films are of critical importance for many optoelectronic devices. In this work, we fabricated an ultrasmooth intermediate-phase free quasi-2D (PEA)2(FA)n−1PbnBr3n+1 perovskite film by using antisolvents with different polarities and boiling points to engineer the crystallization process. The XRD patterns of the perovskite powder showed that
