A 3D printer based slot‐die coater is developed as a lab‐to‐fab translation tool for solution‐processed solar cells. The modified 3D printer is used to develop the printing process for potential use in large scale roll‐to‐roll production. Fabrication of a 47.3 cm2 organic solar cell module with 4.56% efficiency and printed perovskite solar cells with 11.6% efficiency are demonstrated.

In article number 1401539, Doojin Vak and co‐workers describe a new way of developing and sharing processes for the fabrication of solution‐processed solar cells by using a modified 3D printer. The printer is controlled by a text‐based standard digital protocol that can be used in any compatible printers. The results suggest a new paradigm of sharing processes between machines, labs, and eventually factories.