Pure crystal orientation and anisotropic charge transport in large-area hybrid perovskite films.

ABSTRACT: Controlling crystal orientations and macroscopic morphology is vital to develop the electronic properties of hybrid perovskites. Here we show that a large-area, orientationally pure crystalline (OPC) methylammonium lead iodide (MAPbI₃) hybrid perovskite film can be fabricated using a thermal-gradient-assisted directional crystallization method that relies on the sharp liquid-to-solid transition of MAPbI₃ from ionic liquid solution. We find that the OPC films spontaneously form periodic microarrays that are distinguishable from general polycrystalline perovskite materials in terms of their crystal orientation, film morphology and electronic properties. X-ray diffraction patterns reveal that the film is strongly oriented in the (112) and (200) planes parallel to the sub

SUBMITTER: Cho N 

PROVIDER: S-EPMC5109592 | biostudies-literature | 2016 Nov

REPOSITORIES: biostudies-literature