Berlin 2024 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 13: Poster I
HL 13.34: Poster
Montag, 18. März 2024, 15:00–18:00, Poster E
Mask and Plate Metallization for High-Efficiency Solar Cells — •Maral Ghanbari1,2, Jörg Schube1, Tadeo Schweigstill1, Gabriele Mikolasch1, Roman Keding1, and Andreas W. Bett1,2 — 1Fraunhofer Institute for Solar Energy Systems ISE, Heidenhofstraße 2, 79110 Freiburg — 2University of Freiburg, Institute of Physics, Hermann-Herder-Straße 3, 79104 Freiburg
The pursuit of higher conversion efficiency in solar cells is a central objective in photovoltaic manufacturing. Narrowing fingers is one option due to a significant decrease in shading losses. Through precise control of finger dimensions, we aim to enhance solar cell conversion efficiency, specifically for perovskite-silicon tandem solar cells. This study introduces a potential remedy, involving mask and plate metallization technology for perovskite-silicon tandem solar cells. The technique, detailed here, comprises three stages: masking, electroplating, and mask stripping. In the masking phase, hotmelt ink is applied to the substrate via inkjet printing, creating a wax-based phase-change mask with open areas. In the electroplating phase, metal contacts are precisely positioned on these areas, enabling silver-free metallization. In the final stage, the mask can be easily removed using isopropyl alcohol. The primary aim of this study is to develop and understand the inkjet printing process for producing a mask with the narrowest openings, aiming to reduce shading-related losses with metal contacts achieving a width of less than 20 micrometres.
Keywords: Inkjet printing; Plating; Solar cells; Perovskite-silicon tandem; Silicon heterojunction