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Comparing the effects of ultraviolet radiation on four different encapsulants for photovoltaic applications in the Atacama Desert.

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Title: Comparing the effects of ultraviolet radiation on four different encapsulants for photovoltaic applications in the Atacama Desert.
Authors: Correa-Puerta, Jonathan1 (AUTHOR) jonathan.correa@usm.cl, Ferrada, Pablo2 (AUTHOR), Häberle, Patricio1 (AUTHOR), Díaz-Almeida, Daniel2 (AUTHOR), Sanz, Asier3 (AUTHOR), Zubillaga, Oihana4 (AUTHOR), Marzo, Aitor2 (AUTHOR), Portillo, Carlos2 (AUTHOR), del Campo, Valeria1 (AUTHOR)
Source: Solar Energy. Nov2021, Vol. 228, p625-635. 11p.
Subjects: Ultraviolet radiation, Ethylene-vinyl acetate, Radiation sources, Raman spectroscopy, Fluorescence spectroscopy, Photovoltaic power systems
Geographic Terms: Atacama Desert (Chile)
Abstract: • Ultraviolet degradation of encapsulants for photovoltaic modules. • Accelerated indoor UV-aging for photovoltaics devices. • Transmittance of UV degraded polymeric encapsulants. • Indoor UV irradiation of encapsulants related to the Atacama Desert UV conditions. • Raman Spectroscopy for analyzing the degradation of encapsulants in c-Si based PV modules. The performance of photovoltaic modules is highly dependent on the properties of the materials used to build them and is particularly sensitive to the type of encapsulant in the case of harsh outdoor environments. In this study, we compared the effects of ultraviolet (UV) radiation, under laboratory accelerated aging conditions, of four encapsulants: thermoplastic olefin, thermoplastic polyurethane, silicone, and ethylene vinyl acetate. The operation of the indoor ultraviolet chamber, using a mercury/xenon arc lamp as a radiation source, was related to the Atacama Desert ultraviolet conditions to estimate the corresponding time under outdoor conditions. The total indoor experiment time corresponded to 24.7 years of UV-B and 1.34 years UV-A irradiation. Transmittance in the ultraviolet–visible range, together with Raman spectra were analyzed to assess the effect of ultraviolet degradation. The aged encapsulants showed a transmittance reduction between 2% and 5% and a displacement in the ultraviolet cut off to higher wavelengths of around 5 nm. This information was used to compute the potential effect on the photogenerated current density of crystalline silicon photovoltaic modules, which decreased between 1% and 4%. Raman spectroscopy indicated the degradation of the encapsulants' polymer structure as an increment in the fluorescence of the spectra, above 50%, and modifications in the relative intensities of the encapsulant́s active Raman modes. [ABSTRACT FROM AUTHOR]
Copyright of Solar Energy is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 153100324
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Comparing the effects of ultraviolet radiation on four different encapsulants for photovoltaic applications in the Atacama Desert.
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  Data: <searchLink fieldCode="JN" term="%22Solar+Energy%22">Solar Energy</searchLink>. Nov2021, Vol. 228, p625-635. 11p.
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  Data: • Ultraviolet degradation of encapsulants for photovoltaic modules. • Accelerated indoor UV-aging for photovoltaics devices. • Transmittance of UV degraded polymeric encapsulants. • Indoor UV irradiation of encapsulants related to the Atacama Desert UV conditions. • Raman Spectroscopy for analyzing the degradation of encapsulants in c-Si based PV modules. The performance of photovoltaic modules is highly dependent on the properties of the materials used to build them and is particularly sensitive to the type of encapsulant in the case of harsh outdoor environments. In this study, we compared the effects of ultraviolet (UV) radiation, under laboratory accelerated aging conditions, of four encapsulants: thermoplastic olefin, thermoplastic polyurethane, silicone, and ethylene vinyl acetate. The operation of the indoor ultraviolet chamber, using a mercury/xenon arc lamp as a radiation source, was related to the Atacama Desert ultraviolet conditions to estimate the corresponding time under outdoor conditions. The total indoor experiment time corresponded to 24.7 years of UV-B and 1.34 years UV-A irradiation. Transmittance in the ultraviolet–visible range, together with Raman spectra were analyzed to assess the effect of ultraviolet degradation. The aged encapsulants showed a transmittance reduction between 2% and 5% and a displacement in the ultraviolet cut off to higher wavelengths of around 5 nm. This information was used to compute the potential effect on the photogenerated current density of crystalline silicon photovoltaic modules, which decreased between 1% and 4%. Raman spectroscopy indicated the degradation of the encapsulants' polymer structure as an increment in the fluorescence of the spectra, above 50%, and modifications in the relative intensities of the encapsulant́s active Raman modes. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Solar Energy is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1016/j.solener.2021.10.003
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 11
        StartPage: 625
    Subjects:
      – SubjectFull: Ultraviolet radiation
        Type: general
      – SubjectFull: Ethylene-vinyl acetate
        Type: general
      – SubjectFull: Radiation sources
        Type: general
      – SubjectFull: Raman spectroscopy
        Type: general
      – SubjectFull: Fluorescence spectroscopy
        Type: general
      – SubjectFull: Photovoltaic power systems
        Type: general
      – SubjectFull: Atacama Desert (Chile)
        Type: general
    Titles:
      – TitleFull: Comparing the effects of ultraviolet radiation on four different encapsulants for photovoltaic applications in the Atacama Desert.
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            NameFull: Correa-Puerta, Jonathan
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            – D: 01
              M: 11
              Text: Nov2021
              Type: published
              Y: 2021
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              Value: 228
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