Meniscus fabrication of halide perovskite thin films at high throughput for large area and low-cost solar panels

Halide perovskites have rapidly attracted considerable attention due to unprecedented properties not seen in traditional semiconductors. In addition to their optoelectronic merits, one advantage of perovskite materials is their solution processability, which opens the door to low-cost and high throughput solution coating strategies for the commercialization of perovskite solar cells (PSCs). Here we review perovskite film fabrication by meniscus coating-a simple and readily scalable manufacturing technique, including blade coating and slot-die coating. We outline the fundamental fluid mechanisms of meniscus coating, discuss drying and crystallization of perovskite in the coating process, and provide an overview of recent progress in meniscus-coated PSCs.