Used in perovskite solar cells as a key precursor for forming stable and high-efficiency light-absorbing layers. It enables the formation of formamidinium-based perovskite structures, which have a broader light absorption range and better thermal stability compared to methylammonium-based counterparts. This makes it critical for advancing long-lasting, high-performance photovoltaic devices. Also explored in optoelectronic applications such as light-emitting diodes and photodetectors due to its favorable bandgap tunability and charge transport properties.