Impact of the contacting scheme on I-V measurements of metallization-free silicon heterojunction solar cells Malte Brinkmann, Felix Haase, Karsten Bothe, Karsten Bittkau, Andreas Lambertz, Weiyuan Duan, Kaining Ding, Hans-Peter Sperlich, Andreas Waltinger and Henning Schulte-Huxel EPJ Photovolt., 14 (2023) 18 Published online: 26 April 2023 DOI: 10.1051/epjpv/2023009