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Damp‐heat induced degradation in photovoltaic modules manufactured with passivated emitter and rear contact solar cells

journal contribution
posted on 31.03.2022, 09:09 by Nikoleta Kyranaki, Alex SmithAlex Smith, Keith YendallKeith Yendall, David HuttDavid Hutt, David Whalley, Ralph Gottschalg, Tom BettsTom Betts
Corrosion is one of the main PV module failure mechanisms, as it can cause severe electrical performance degradation in PV modules exposed to hot and humid environments. Moisture penetrating a photovoltaic (PV) module may react with the metallic components causing corrosion. In addition, acetic acid which is produced by hydrolysis of ethylene vinyl acetate (EVA), the most common encapsulant, may further degrade metallic components. Corrosion is one of the main PV module failure mechanisms, as it can cause severe electrical performance degradation in PV modules exposed to hot and humid environments. The specific chemical reactions involved in the corrosion mechanisms for the different components are well understood. However, which of these causes the most serious degradation in the field, and therefore, most severe power loss is unknown. Moreover, the severity of corrosion in the absence of acetic acid is not yet well researched. This work distinguished between the front and rear side corrosion mechanisms and identified the different electrical signatures observed due to them. The experiment included damp-heat (DH) conditioning of single-cell mini-modules, containing passivated emitter and rear contact (PERC) solar cells, laminated with a polyethylene terephthalate (PET) based backsheet. Furthermore, half-encapsulated PERC PV cells were tested, with either the front or the rear side exposed. Electrical and material characterisation were conducted for the investigation of the sample degradation, and the performance decrease, related to the degradation of the rear surface passivation, was examined.

Funding

Horizon 2020 Framework Programme SOLAR-TRAIN. Grant Number: 721452

History

School

  • Mechanical, Electrical and Manufacturing Engineering
  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Materials

Research Unit

  • Centre for Renewable Energy Systems Technology (CREST)

Published in

Progress in Photovoltaics: Research and Applications

Publisher

Wiley

Version

AM (Accepted Manuscript)

Rights holder

© John Wiley & Sons, Ltd

Publisher statement

This is the peer reviewed version of the following article: KYRANAKI, N. ... et al, 2022. Damp-heat induced degradation in photovoltaic modules manufactured with passivated emitter and rear contact solar cells. Progress in Photovoltaics: Research and Applications, doi:10.1002/pip.3556, which has been published in final form at https://doi.org/10.1002/pip.3556. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.

Acceptance date

27/02/2022

Publication date

2022-03-11

Copyright date

2022

ISSN

1062-7995

eISSN

1099-159X

Language

en

Depositor

Dr David Hutt. Deposit date: 29 March 2022