Low temperature preparation of all-inorganic CsPbI_3 perovskite solar cells with ethanediamine as additive

摘要

All-inorganic CsPbI_3 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 CsPbI_3 perovskite film as low as 80 °C by reducing the grain size, which is the lowest reported phase stabilization temperature for CsPbI_3 film so far. More importantly, the prepared films can be stable at room temperature for two months without phase decomposition. The CsPbI_3 perovskite solar cells demonstrate power conversion efficiency to 9.62%.