One primary reason for the rapid increase in efficiency of perovskite-based photovoltaic technology is their modular composition and modular fabrication methods. In this study, we utilize a two-step dipping method for the fabrication of a type of perovskite called formamidinium lead iodide (FAPbI3), which is formed from precursor lead iodide (PbI2) and formamidinium iodide (FAI). We study (a) how the FAI precursor temperature affects the resulting morphological features of the thin film and (b) how much of the precursor materials converted to FAPbI3. We found that as temperature of the dipping solution was increased, there was a greater precursor conversion, as seen by SEM, XRD, and UV-Vis. Also, as the temperature of the precursor solution increased, film thickness and absorbance also increased. Future work will involve attaining electrical data to gain an understanding of the optoelectronic properties of the solar cells.

Temperature dependence of solution processed formamidinium iodide based perovskite thin films

253rd National Meeting (2017)

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