Yourlocation: Home > News > Supramolecular Interactions of Chenodeoxycholic Acid Increase the Efficiency of Dye-Sensitized Solar Cells
A combined experimental and computational study is carried out to understand the nature of the interfaces between dye-sensitized TiO2 and cobalt-based electrolyte in the presence of a prototype coabsorbent, chenodeoxycholic acid (CDCA), employed in dye-sensitized solar cells (DSCs). It was recently reported that including CDCA both in the dye and in the electrolyte solutions substantially improved the performance of DSCs based on a Fc/Fc+ electrolyte. 
Here, we evaluate the individual and combined effect of chenodeoxycholic acid as a surface coadsorbent and as an additive in DSCs based on a Co(II)/Co(III) electrolyte, in combination with two prototypical Ru(II) dyes, N719 and Z907. For both dyes, the concomitant use of CDCA in the dye bath and in the electrolyte solution leads to a significant improvement, by about a factor of 2, of the DSCs photovoltaic performances, allowing us to reach 5.3% efficiency with Z907. FT-IR analyses conducted on the solid and TiO2-adsorbed CDCA highlight the presence of surface-adsorbed interacting CDCA molecules, possibly creating a bulky insulating network on the TiO2 surface. Computational analyses have been carried out to gain insight into the nature of the supramolecular aggregates occurring for CDCA on the TiO2 surface.
Study chenodeoxycholic acid taurine (TCDCA) on oxygen free radicals metabolism in mice. Respectively by xanthine oxidase chemiluminescence, colorimetric chemistry, spectrophotometry, TBA law and the ELISA assay in mouse plasma, liver and brain tissue superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), catalase (CAT) activity and malondialdehyde (MDA) content in plasma nitric oxide synthase (NOS) activity. the results show that high or low dose of TCDCA could significantly increase the mouse plasma and liver tissue SOD activity, significantly increased in mice liver tissue CAT activity, significantly increased in mouse plasma NOS activity, significantly reduced liver tissue GSH-Px activity; high dose TCDCA can significantly increase GSH-Px activity in mice brain; low dose TCDCA significantly increase in CAT activity in mouse plasma; high or low dose of TCD-CA were able to significantly reduce the mouse plasma and brain tissue, MDA content in liver tests showed TCDCA has significant antioxidant effect.

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