Formamidinium lead iodide perovskite: Structure, shape and optical tuning via hydrothermal method

In this letter, we introduced a novel method for the preparation of room temperature stable α-FAPbI3 perovskite without using organic ligands and mixed cations by hydrothermal method. Structural, optical and morphology of the product were changed with respect to the temperature. Equal volume of the chlorobenzene anti-solvent was used together with perovskite solution to saturate and simply growing the perovskite crystals under hydrothermal method. Optimum temperature (140 °C) was determined from XRD and UV-vis absorption result achieving stable α-FAPbI3 perovskite. This work favours the understanding of the large scale with stable α-FAPbI3 perovskite with interesting morphology, and paves the way for potential applications in diverse field.