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Roll-to-Roll Printing of Perovskite Solar Cells

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journal contribution
posted on 26.09.2018, 00:00 by Benjia Dou, James B. Whitaker, Karsten Bruening, David T. Moore, Lance M. Wheeler, John Ryter, Nicholas J. Breslin, Joseph J. Berry, Sean M. Garner, Frank S. Barnes, Sean E. Shaheen, Christopher J. Tassone, Kai Zhu, Maikel F. A. M. van Hest
High efficiency combined with transformative roll-to-roll (R2R) printability makes metal halide perovskite-based solar cells the most promising solar technology to address the terawatt challenge of the future energy demand. However, translation from lab-scale deposition solution processing techniques to large-scale R2R methods has typically led to reduced photovoltaic performance. Here, we demonstrate large-scale, highly crystalline, uniaxially oriented, smooth perovskite films printed at room temperature and in the ambient environment. Confirmed with high speed in situ X-ray diffraction measurements, the perovskite films reach 98% of relative crystallinity at room temperature and display high texture within 1 s of the coating. We demonstrate an all-blade-coated metal halide perovskite cell with power conversion efficiency (PCE) up to 19.6%, a slot-die coated cell with a PCE of 17.3%, and a partially R2R slot-die coated flexible glass-based cell efficiency of 14.1%. The developed printing method can be applied to diverse perovskite compositions, enabling a variety of bandgaps to pave the way for the future R2R printing of highly efficient perovskite–perovskite tandem cells.

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