Journal
ACS APPLIED ENERGY MATERIALS
Volume 2, Issue 1, Pages 124-130Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.8b01864
Keywords
dye sensitized solar cells; co-adsorbent; monolayer; multilayer; concentration depth profiles; neutral impact collision ion scattering spectroscopy
Funding
- Indonesian Government
- Australian Microscopy and Microanalysis Research Facility (AMMRF)
- Australian National Fabrication Facility (ANFF) at the South Australian node of the AMMRF under the National Collaborative Research Infrastructure Strategy
- Australian National Fabrication Facility (ANFF) at the South Australian node of ANFF under the National Collaborative Research Infrastructure Strategy
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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.
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