24% Efficient TOPCon-based back contacted polyZEBRA solar cells Jonathan Linke, Christoph Peter, Jan Hoß, Saman Sharbaf Kalaghichi, Valentin Mihailetchi, Jan Lossen and Florian Buchholz EPJ Photovolt., 16 (2025) 8 Published online: 15 January 2025 DOI: 10.1051/epjpv/2024051