Restructuring of dye layers in dye sensitized solar cells: Cooperative adsorption of N719 and chenodeoxycholic acid on titania

Herri Trilaksana, Cameron Shearer, Lars Kloo, Gunther G. Andersson

    Research output: Contribution to journalArticle

    4 Citations (Scopus)

    Abstract

    The effect of the co-adsorbent chenodeoxycholic acid (CDCA) up to a concentration of 20 mM on the adsorption of the dye N719 onto titania has been investigated using neutral impact collision ion scattering spectroscopy. It is shown that the co-adsorption of CDCA changes the adsorption mode of N719 from multilayer toward monolayer. FT-IR spectroscopy shows that the adsorption of CDCA increases with increasing CDCA concentration. In contrast, the amount of N719 adsorbed onto titania shows a minimum at 10 mM CDCA, and the relationship between the amount of CDCA and of N719 adsorbed onto titania depends nonmonotonically on the CDCA concentration. The co-adsorption of CDCA and N719 can be described as cooperative. The effect is observed for both low and high N719 concentrations.

    Original languageEnglish
    Pages (from-to)124-130
    Number of pages7
    JournalACS Applied Energy Materials
    Volume2
    Issue number1
    DOIs
    Publication statusPublished - 28 Jan 2019

    Keywords

    • Co-adsorbent
    • Concentration depth profiles
    • Dye sensitized solar cells
    • Monolayer
    • Multilayer
    • Neutral impact collision ion scattering spectroscopy

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