Issue |
EPJ Photovolt.
Volume 14, 2023
Special Issue on ‘WCPEC-8: State of the Art and Developments in Photovoltaics’, edited by Alessandra Scognamiglio, Robert Kenny, Shuzi Hayase and Arno Smets
|
|
---|---|---|
Article Number | 13 | |
Number of page(s) | 8 | |
Section | High Efficiency Materials and Devices - New concepts | |
DOI | https://doi.org/10.1051/epjpv/2023004 | |
Published online | 07 March 2023 |
https://doi.org/10.1051/epjpv/2023004
Regular Article
Assessing the long-term stability of laser enhanced contact optimization (LECO) treated PERC cells in PV modules by extended indoor and outdoor durability tests
1
Fraunhofer-Center for Silicon-Photovoltaics CSP, Halle, Germany
2
Fraunhofer Institute for Microstructure of Materials and Systems IMWS, Halle, Germany
3
CE Cell Engineering GmbH, Kabelsketal, Germany
4
Martin-Luther-Universität Halle-Wittenberg, Halle, Germany
* e-mail: e.krassowski@cell-engineering.de
Received:
30
July
2022
Received in final form:
27
December
2022
Accepted:
13
January
2023
Published online: 7 March 2023
It was previously shown that the Laser Enhanced Contact Optimization (LECO) Process is a promising boost for PERC and TOPCon cell manufacturing enhancement. In this contribution, a method is developed to assess the long-term stability of industrial LECO treated PERC cells in a module compound. Therefore, extended accelerated aging tests as well as outdoor measurements were performed on modules comprising LECO treated cells as well as untreated references. It is described, how data can be evaluated to separate typical, known aging and degradation effects from presumable LECO specific effects. The results of this work show that test modules comprising LECO treated cells did not show a different behavior in the accelerated aging or degradation compared to the reference. The same conclusion was found for thermal cycling and damp heat tests, both far in excess of IEC requirements, as well as in a sequential test sequence. In addition, their outdoor performance with local and integral measurements has been evaluated. We can conclude that for the tested PERC cells, aging and degradation effects appeared, but none of them could be attributed to the LECO process. Hence, improvements in the efficiency and/or yield on cell level due to LECO can be translated to the module or even system level considering typical aging and degradation behavior, independently of a prior LECO process.
Key words: Laser enhanced contact optimization / accelerated aging tests / outdoor tests / passivated emitter and rear cells / module stability
© E. Krassowski et al., Published by EDP Sciences, 2023
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.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.