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AuthorGanesan, Paramaguru
AuthorYella, Aswani
AuthorHolcombe, Thomas W.
AuthorGao, Peng
AuthorRajalingam, Renganathan
AuthorAl-Muhtaseb, Shaheen A.
AuthorGrätzel, Michael
AuthorNazeeruddin, Mohammad Khaja
Available date2022-11-28T08:18:28Z
Publication Date2015
Publication NameACS Sustainable Chemistry and Engineering
ResourceScopus
Resource2-s2.0-84991467182
URIhttp://dx.doi.org/10.1021/acssuschemeng.5b00332
URIhttp://hdl.handle.net/10576/36758
AbstractTwo D-?-A dyes, one with a strong electron withdrawing cyanoacrylic acid DPP 20 and one with a weak acceptor carboxylic acid DPP 21 have been synthesized and characterized for their application in dye-sensitized solar cells. This allows us to understand the role of electron withdrawing strength of the acceptor anchoring groups on the optoelectronic properties of chromophoric ? spacer molecules, e.g., the diketopyrrolopyrrole (DPP) moiety. The low energy absorption maxima of DPP 20 is red-shifted by only 7 nm compared to DPP 21, implying a minimal role for the strong acceptor in the light harvesting properties of colored ? spacer molecules. Because of this small red shift, JSC of DPP 20 is marginally higher than that of DPP 21. However, because of the higher fill factor of DPP 21, the overall power conversion efficiency (PCE = 7.65%) is higher than that of DPP20 (7.34%). The data reveal that a weak acceptor is adequate to achieve good light harvesting as well as provide good photovoltaic efficiencies for colored ? spacer sensitizers.
Languageen
PublisherAmerican Chemical Society
SubjectAnchoring group
Cyanoacrylic acid
Diketopyrrolopyrrole
Dye-sensitized solar cells
Tio2
TitleUnravel the impact of anchoring groups on the photovoltaic performances of diketopyrrolopyrrole sensitizers for dye-sensitized solar cells
TypeArticle
Pagination2389-2396
Issue Number10
Volume Number3
dc.accessType Abstract Only


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