Forming Room-Temperature Stable FAPbI3—A Multimodal In Situ Study

Organic-inorganic halide perovskites are a versatile material class with excellent optoelectronic properties. One of the current research directions is the stabilization of the photoactive FAPbI3 phase. In this talk I will describe our joint efforts in forming phase pure and room-temperature stable FAPbI3. Application of in situ characterizations during FAPbI3 formation unveils initial nucleation and growth stages. The addition of additives to the precursor can influence the nucleation and preferential orientation leading to the absence of solvate and non-perovskite phases. Interestingly, the proposed strategy is widely applicable to different deposition methods including one- and two-step protocols. Another aspect I will touch on is reproducibility challenges in the field. Therefore, automation of halide perovskite synthesis at high throughput presents an attractive route to identify synthesis parameter-structure-function properties.