Hybrid Deposition - a Route Towards the Scaling of Perovskite-Silicon Tandem Solar Cells
Juliane Borchert a b c
a Fraunhofer Institute for Solar Energy Systems, Freiburg, 79110, Germany.
b Institute for Sustainable Systems Engineering,University of Freiburg, 79110, Germany
c Cluster of Excellence livMatS @ FIT Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT) University of Freiburg, 79110 Freiburg, Germany
Invited Speaker Session, Juliane Borchert, presentation 106
Publication date: 6th February 2024

Perovskite-silicon tandem solar cells are a highly promising technology for the next generation of solar cells. Textures on the front and the rear side help maximize energy yield under field conditions [1]. To coat such textured surfaces uniformly we use a two-step hybrid route to deposit mixed cation, mixed halide perovskite absorber films. In a first step, the inorganic components are thermally evaporated to form a scaffold, allowing for conformal coating of random pyramid textured silicon. In a second step, the conversion into perovskite is accomplished using a solution containing the organic components. To enable the scaling and industrial use of perovskite-silicon solar cells it is crucial to understand and optimise the physical and chemical processes happening during the deposition of the perovskite films and adjacent contact layers. In this contribution we present our insights into the hybrid deposition route and our efforts to upscale perovskite-silicon tandem solar cells from small solar cells to full wafer area devices. We discuss the progress that has been made and the challenges that remain. Furthermore, we will give an outlook towards perovskite based triple junction solar cells.


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