Progress in Photovoltaics - 2022 - Kyranaki - Damp‐heat induced degradation in photovoltaic modules manufactured with.pdf (36.44 MB)
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Damp‐heat induced degradation in photovoltaic modules manufactured with passivated emitter and rear contact solar cells

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journal contribution
posted on 05.08.2022, 14:20 authored 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

Volume

30

Issue

9

Pages

1061 - 1071

Publisher

Wiley

Version

VoR (Version of Record)

Rights holder

© The Authors

Publisher statement

This is an Open Access Article. It is published by Wiley under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence (CC BY-NC-ND). Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

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