Extreme sensitivity of dye solar cells to UV-induced degradation

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dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorPoskela, Aapoen_US
dc.contributor.authorMiettunen, Katien_US
dc.contributor.authorTiihonen, Armien_US
dc.contributor.authorLund, Peter D.en_US
dc.contributor.departmentDepartment of Applied Physicsen
dc.contributor.departmentDepartment of Bioproducts and Biosystemsen
dc.contributor.groupauthorNew Energy Technologiesen
dc.contributor.groupauthorBio-based Colloids and Materialsen
dc.date.accessioned2021-03-03T07:36:50Z
dc.date.available2021-03-03T07:36:50Z
dc.date.issued2021-01en_US
dc.description.abstractPresent practice to avoid harmful effects of UV light on dye solar cells (DSC) is to use a UV filter. However, we show here that a standard 400 nm UV cutoff filter offers inadequate protection from UV-induced degradation. DSCs that were exposed to only visible light by LED lamps maintained 100% of their initial efficiency after 3000 hours of exposure, whereas the efficiency of DSCs subjected to full light spectrum (Xenon arc lamp) with an efficient UV filter dropped down to 10% of their initial performance already after 1500 hours. Optical analysis of the UV filter confirmed that the amount of light transmitted below 400 nm was negligible. These observations indicate that (a) DSCs can be very sensitive to even minor amount of UV and (b) eliminating the effects of UV light on DSC stability cannot easily be avoided by a UV filter on top of the cell. A detailed analysis of the degradation mechanisms revealed that the culprit to loss of performance was accelerated loss of charge carriers in the electrolyte of the DSCs-a typical symptom of UV exposure. These results suggest that commonly used stability tests under LED illumination are insufficient in predicting the lifetime of DSCs in outdoor conditions. Instead, for such purpose, we recommend solar cell stability to be tested with a full light spectrum and with a suitable UV filter.en
dc.description.versionPeer revieweden
dc.format.extent8
dc.format.extent19-26
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationPoskela, A, Miettunen, K, Tiihonen, A & Lund, P D 2021, ' Extreme sensitivity of dye solar cells to UV-induced degradation ', Energy Science & Engineering, vol. 9, no. 1, pp. 19-26 . https://doi.org/10.1002/ese3.810en
dc.identifier.doi10.1002/ese3.810en_US
dc.identifier.issn2050-0505
dc.identifier.otherPURE UUID: ae7178e2-3548-4e63-810f-0a135bf06065en_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/ae7178e2-3548-4e63-810f-0a135bf06065en_US
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85090449949&partnerID=8YFLogxKen_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/56621079/ese3.810.pdfen_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/102916
dc.identifier.urnURN:NBN:fi:aalto-202103032205
dc.language.isoenen
dc.publisherWiley
dc.relation.ispartofseriesEnergy Science & Engineeringen
dc.relation.ispartofseriesVolume 9, issue 1en
dc.rightsopenAccessen
dc.subject.keywordLONG-TERM STABILITYen_US
dc.subject.keywordBLOCKING LAYERSen_US
dc.subject.keywordPERFORMANCEen_US
dc.subject.keywordWATERen_US
dc.subject.keywordEFFICIENCYen_US
dc.titleExtreme sensitivity of dye solar cells to UV-induced degradationen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
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