Stability of MAPbI perovskite grown on planar and mesoporous electron-selective contact by inverse temperature crystallization.

Single crystalline perovskite solar cells (PSC) are promising for their inherent stability due to the absence of grain boundaries. While the development of single crystals of perovskite with enhanced optoelectronic properties is known, studies on the growth, device performance and understanding of the intrinsic stability of single crystalline perovskite thin film solar cell devices fabricated on electron selective contacts are scarcely explored. In this work, we examine the impact of mesoporous TiO (m-TiO) and planar TiO (p-TiO) on the growth of single crystalline-methyl ammonium lead iodide (SC-MAPbI) film, PSC device performance and film stability under harsh weather conditions (T ∼ 85 °C and RH ∼ 85%).