Physics

Geology

Fabrication

Pathology

Meteorology

Relative humidity

Nanotechnology

Energy conversion efficiency

Coating

Deposition (geology)

Biology

Roll-to-roll processing

Die (integrated circuit)

Oceanography

Engineering

Perovskite (structure)

Paleontology

Composite material

Materials science

Alternative medicine

Substrate (aquarium)

Sediment

Layer (electronics)

Solar cell

Chemical engineering

Optoelectronics

Polymer

Medicine

Advanced Functional Materials

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.

Humidity‐Tolerant Roll‐to‐Roll Fabrication of Perovskite Solar Cells via Polymer‐Additive‐Assisted Hot Slot Die Deposition