Direct Observation of Fast Carriers Transport along Out-of-Plane Direction in a Dion-Jacobson Layered Perovskite

Layered perovskites have been broadly applied in perovskite solar cells and light-emitting diodes to enhance device stability, but the poor carrier transport property along the out-of-plane direction for all known Ruddlesden-Popper (RP) layered perovskites imposes constraints to their application. Herein, using transient photoluminescence mapping, we visualized that the transport of carriers or excitons along the out-of-plane direction is comparable to along the in-plane direction in n Dion-Jacobson (DJ) layered perovskite, which has the reduced ligand length and stronger I...I electronic interaction between inorganic layers.

Automated summary

In this study, the transport properties of carriers in a new type of layered perovskite were observed using transient photoluminescence mapping, and it was found that the transport along the out-of-plane direction is comparable to that along the in-plane direction.