This talk will discuss my group's recent efforts to address stability challenges in metal halide perovskites (MHPs) through complementary, scalable approaches across multiple length scales. The first approach highlighted will be using organic additives to passivate defects at MHP grain boundaries and surfaces, with an emphasis on understanding the influence of molecular structure so that design rules can be developed. I will highlight the effects of organic additives on the optoelectronic, stability, and mechanical properties of MHPs, and in particular their influence on the inelastic deformation of MHP thin films recently discovered by my group. I will also show that nanocompositing is a successful strategy to enhance the cohesion of MHP thin films, which is coupled with only a minimal loss in device performance. Finally, I will discuss a novel printing process being developed by our group, which has enabled MHP thin film print speeds of >60 m/min.
