J. Sutter, P. Tockhorn, P. Wagner, K. Jäger, A. Al‐Ashouri, B. Stannowski, S. Albrecht, C. Becker
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Periodically Nanostructured Perovskite/Silicon Tandem Solar Cells with Power Conversion Efficiency Exceeding 26%
The power conversion efficiency (PCE) of perovskite/silicon tandem solar cells (PSTSCs) is expected to increase with optimized light management. In this work, we report on PSTSCs containing nanostructures enabling PCEs exceeding 26%. A hexagonal sinusoidal nanostructure with 750nm period was used. The structure was transferred into silicon by nanoimprint lithography and reactive ion etching. Perovskite top cells were deposited by spin-coating resulting in a full coverage of the nanostructure. PSTSC comprising these nanostructures yielded a steady-state PCE of 26.1% and a short-circuit current density of 19.5mA·cm−2.
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