Jäger, K.; Chen, D.; Tockhorn, P.; Eisenhauer, D.; Köppel, G.; Manley, P.; Hammerschmidt, M.; Burger, S.; Albrecht, S.; Becker, C.: Antireflective nanotextures for monolithic perovskite-silicon tandem solar cells. In: Ralf B. Wehrspohn, Alexander N. Sprafke [Ed.] : Photonics for Solar Energy Systems VII : 23-25 April 2018, Strasbourg, France . Bellingham, Wash.: SPIE, 2018 (Proceedings of SPIE ; 10688). - ISBN 978-1-5106-1902-9, p. 10688A/1-7
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Recently, we studied the effect of hexagonal sinusoidal textures on the reflective properties of perovskite-silicon tandem solar cells using the finite element method (FEM). We saw that such nanotextures, applied to the perovskite top cell, can strongly increase the current density utilization from 91% for the optimized planar reference to 98% for the best nanotextured device (period 500 nm and peak-to-valley height 500 nm), where 100% refers to the Tiedje-Yablonovitch limit. [D. Chen et al., J. Photonics Energy 8, 022601, (2018), doi: 10.1117/1.JPE.8.022601] In this manuscript we elaborate on some numerical details of that work: we validate an assumption based on the Tiedje-Yablonovitch limit, we present a convergence study for simulations with the finite-element method, and we compare different configurations for sinusoidal nanotextures.