Organic molecules and semiconductors have been proposed as active part of a large variety of nonvolatile memory devices, including resistors, diodes and transistors. In this review, we focus on electrically reprogrammable nonvolatile memories. We classify several possible devices according to their operation principle and critically review the role of the π-conjugated materials in the device operation. We propose specifications for applications for organic nonvolatile memory and review the state of the art with respect to these target specifications. Conclusions are drawn regarding further work on materials and device architectures.

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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.

Heating-assisted deposition is an industry-friendly scalable deposition method. This manufacturing method is employed together with slot die coating to fabricate perovskite solar cells via a roll-to-roll process. The feasibility of the method is demonstrated after initial testing on a rigid substrate using a benchtop slot die coater in air. The fabricated solar cells exhibit power conversion efficiencies (PCEs) up to 14.7%. A nonelectroactive polymer additive is used with the perovskite formulation and found to improve its humidity tolerance significantly. These deposition parameters are also used in the roll-to-roll setup. The perovskite layer and other solution-processed layers are slot die-coated, and the fabricated device shows PCEs up to 11.7%, which is the highest efficiency obtained from a fully roll-to-roll processed perovskite solar cell to date.

Pentacene organic field‐effect transistors with multilayer graphene electrodes exhibit a lower contact resistance and lower charge‐injection barrier height than those with conventional Au electrodes. This enhancement in performance is related to the favorable dipole layer formation at the graphene/pentacene interface.