Filipic, MihaLoeper, PhilippNiesen, BjoernDe Wolf, StefaanKrc, JanezBallif, ChristopheTopic, Marko2015-05-292015-05-292015-05-29201510.1364/Oe.23.00A263https://infoscience.epfl.ch/handle/20.500.14299/114303WOS:000352290000008In this study we analyze and discuss the optical properties of various tandem architectures: mechanically stacked (four-terminal) and monolithically integrated (two-terminal) tandem devices, consisting of a methyl ammonium lead triiodide (CH3NH3PbI3) perovskite top solar cell and a crystalline silicon bottom solar cell. We provide layer thickness optimization guidelines and give estimates of the maximum tandem efficiencies based on state-of-the-art sub cells. We use experimental complex refractive index spectra for all involved materials as input data for an in-house developed optical simulator CROWM. Our characterization based simulations forecast that with optimized layer thicknesses the four-terminal configuration enables efficiencies over 30%, well above the current single-junction crystalline silicon cell record of 25.6%. Efficiencies over 30% can also be achieved with a two-terminal monolithic integration of the sub-cells, combined with proper selection of layer thicknesses. (C) 2015 Optical Society of Americatext::journal::journal article::research article