https://doi.org/10.1051/epjpv/2024051
Original Article
24% Efficient TOPCon-based back contacted polyZEBRA solar cells
International Solar Energy Research Center Konstanz e.V., Rudolf-Diesel-Str. 15, 78467 Konstanz, Germany
* e-mail: jonathan.linke@isc-konstanz.de
Received:
16
July
2024
Accepted:
3
December
2024
Published online: 15 January 2025
This publication serves as an update on the progress of the back contacted polyZEBRA solar cell technology, which features Tunnel Oxide Passivating Contact (TOPCon) structures on both polarities. The solar cell efficiency mean values published by the end of last year have been improved by +1%abs to 24.0%. Following the key parameter changes, it is discussed how this improvement has been achieved. These changes are in particular the cell thickness and base resistivity, a dedicated wet-chemical cleaning step, the rear AlOx capping layer thickness and the pitch of the rear metallization pattern.
Key words: polyZEBRA / back contact / IBC / TOPCon / poly-Si
© J. Linke et al., Published by EDP Sciences, 2025
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.