Abstract
Herein we demonstrate that efficient perovskite solar cells can be fabricated by a desktop multi-channel inkjet printer. In this approach, different alkyl-ammonium counterions were loaded separately into the printer cartridges and deposited onto PbI2 coated substrates. Structural as well as electronic properties of perovskite solar cells can be tuned by varying the composition ratio of multiple cations in-situ through the RGB color codes of the multi-channel inkjet printer. This roll-to-roll compatible technique provides rapid and facile screening of multiple and mixed counterion perovskite solar cell systems with high reproducibility, potentially leading to possibilities of high-throughput screening technique in future perovskite solar cell fabrication.
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