Rahul Patidar
The ability of metal halide perovskite to solution process opens a window for high through put manufacturing of perovskite solar cells(PSCs). High efficiency PSCs can be processed entirely from solution and onto flexible substrates. This makes them ideal for high throughput manufacturing process like roll-to-roll (R2R). R2R is a continuous processing of flexible substrates as it is transferred between moving rolls. Common R2R compatible techniques such as screen printing, inkjet printing, spray coating, slot die coating, gravure printing and blade coating have been demonstrated for the fabrication of PSCs1. Among these, gravure and slot die coatings are only reported methods for R2R processing of PSCs. Slot die coating is more preferable because its suitable with wide range of ink rheologies, from low viscosity inks like perovskite to highly viscous paste like carbon.