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The impact of acetic acid corrosion on the front-side contacts and the finger electrodes of c-Si PV cells

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conference contribution
posted on 18.10.2018 by Nikoleta Kyranaki, Jiang Zhu, Tom Betts, Ralph Gottschalg
Damp-heat stresses typically lead to corrosion related degradation for Ethylene-vinyl acetate (EVA) encapsulated PV modules. The degraded module appears as bright areas along the busbars in electroluminescence (EL) images. The most likely mechanism that causes these bright areas is corrosion at the silver contacts and the finger electrodes at the front surface of the cell, due to acetic acid accumulation. In this work, these mechanisms are investigated by immersion of half encapsulated cells into acetic acid solutions with different concentrations. Dark and light I-V curve measurements and electroluminescence images were conducted during the course of ageing to investigate the power degradation. The chemical changes in materials are identified by optical microscopy images and SEM-EDX analysis.

Funding

This study has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 721452.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Proceedings of the 14th Photovoltaic Science, Applications and Technology Conference (PVSAT-14)

Citation

KYRANAKI, N. ... et al, 2018. The impact of acetic acid corrosion on the front-side contacts and the finger electrodes of c-Si PV cells. IN: Proceedings of the 14th Photovoltaic Science, Applications and Technology Conference (PVSAT-14), London, UK, 18-19 April 2018.

Publisher

© The Solar Energy Society

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2018

Notes

This is a conference paper.

Publisher version

Language

en

Location

London, UK

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