16.8% Monolithic all-perovskite triple-junction solar cells via a universal two-step solution process

Junke Wang, Valerio Zardetto, Kunal Datta, Dong Zhang, Martijn M. Wienk and René A. J. Janssen ()
Additional contact information
Junke Wang: Eindhoven University of Technology, partner of Solliance, P.O. Box 513
Valerio Zardetto: TNO, partner of Solliance, High Tech Campus 21
Kunal Datta: Eindhoven University of Technology, partner of Solliance, P.O. Box 513
Dong Zhang: Eindhoven University of Technology, partner of Solliance, P.O. Box 513
Martijn M. Wienk: Eindhoven University of Technology, partner of Solliance, P.O. Box 513
René A. J. Janssen: Eindhoven University of Technology, partner of Solliance, P.O. Box 513

Nature Communications, 2020, vol. 11, issue 1, 1-10

Abstract: Abstract Perovskite semiconductors hold a unique promise in developing multijunction solar cells with high-efficiency and low-cost. Besides design constraints to reduce optical and electrical losses, integrating several very different perovskite absorber layers in a multijunction cell imposes a great processing challenge. Here, we report a versatile two-step solution process for high-quality 1.73 eV wide-, 1.57 eV mid-, and 1.23 eV narrow-bandgap perovskite films. Based on the development of robust and low-resistivity interconnecting layers, we achieve power conversion efficiencies of above 19% for monolithic all-perovskite tandem solar cells with limited loss of potential energy and fill factor. In a combination of 1.73 eV, 1.57 eV, and 1.23 eV perovskite sub-cells, we further demonstrate a power conversion efficiency of 16.8% for monolithic all-perovskite triple-junction solar cells.

Date: 2020
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DOI: 10.1038/s41467-020-19062-8

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