| 초록 |
Controlling crystal orientation and macroscopic morphology is vital to develop the electronic properties of hybrid perovskites. Here we showed 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 MAF, ionic liquid solution. We found 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. We confirmed perovskite crystals of MAPbI3 by using polarization microscope, scanning electron microscope and X-ray diffraction pattern. This material will be used to application of photoelectron devices. |
