Low temperature preparation of all-inorganic CsPbI3 perovskite solar cells with ethanediamine as additive

All-inorganic CsPbI3 perovskite with phase stabilization are fabricated by employing a simple one-pot solution method with ethanediamine as the additive. The ethanediamine induceds the phase stabilization temperature of all-inorganic CsPbI3 perovskite film as low as 80 °C by reducing the grain size, which is the lowest reported phase stabilization temperature for CsPbI3 film so far. More importantly, the prepared films can be stable at room temperature for two months without phase decomposition. The CsPbI3 perovskite solar cells demonstrate power conversion efficiency to 9.62%.