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Towards Perovskite Silicon Tandem Solar Cells with Optimized Optical Properties

: Goldschmidt, J.G.; Bett, A.J.; Schulze, P.S.C.; Tucher, N.; Bivour, M.; Kohlstädt, M.; Lee, S.; Mastroianni, S.; Mundt, L.; Mundus, M.; Ndione, P.; Wienands, K.; Winkler, K.; Würfel, U.; Hermle, M.; Glunz, S.W.


Institute of Electrical and Electronics Engineers -IEEE-:
Get energized with solar power. 44th IEEE Photovoltaic Specialists Conference : Washington, DC, June 25-30, 2017
Piscataway, NJ: IEEE, 2017
ISBN: 978-1-5090-5605-7
ISBN: 978-1-5090-5606-4
Photovoltaic Specialists Conference (PVSC) <44, 2017, Washington/DC>
Conference Paper
Fraunhofer ISE ()
Solarzellen - Entwicklung und Charakterisierung; Photovoltaik; Neuartige Photovoltaik-Technologien; Tandemsolarzellen auf kristallinem Silicium; Silicon Tandem Solar Cells; OPTOS

Perovskite silicon tandem solar cells can overcome the efficiency limit of single junction solar cells. For an optimized optical performance, we propose a 2-terminal device featuring a front-side anti-reflection structure, optimized layer thicknesses, a meso-porous scaffold for the perovskite solar cell and a rear-side light-trapping structure for the silicon solar cell. To maintain the functionality of the underlying layers, we have developed a low-temperature process to realize a meso-porous TiO 2 scaffold via ultra-violet (UV) curing. With perovskite solar cell efficiencies >15%, we achieve results comparable to our conventional high-temperature (> 500°C) route. For the optical optimization of the complex tandem device with elements of different feature sizes, we apply a matrix-based formalism and show how layer thickness optimization and the rear-side light trapping can significantly improve the current of the tandem device.