Researchers from Sweden's Chalmers University of Technology recently gained new insights into the dynamics of prototypical 2D halide perovskites (HPs) based on MAPbI3 as a function of linker molecule and the number of perovskite layers using atomic-scale simulations.
The team showed that the layers closest to the linker undergo transitions that are distinct from those of the interior layers. These transitions can take place anywhere between a few tens of Kelvin degrees below and more than 100 K above the cubic–tetragonal transition of bulk MAPbI3.
In combination with the thickness of the perovskite layer, this enables one to template phase transitions and tune the dynamics over a wide temperature range.
These results reveal the details of an important and generalizable design mechanism for tuning the properties of these materials.
