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 journalArticlepeer-review

15 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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