
Electrochemical analysis of dye adsorption on aligned carbon nanofiber arrays coated with TiO2 nanoneedles for dye-sensitized solar cell
Jianwei LIU, Jun LI
Front. Optoelectron. ›› 2011, Vol. 4 ›› Issue (1) : 53-58.
Electrochemical analysis of dye adsorption on aligned carbon nanofiber arrays coated with TiO2 nanoneedles for dye-sensitized solar cell
An electrochemical method has been developed to analyze dye absorption on the aligned carbon nanofiber arrays coated with TiO2 nanoneedles for dye-sensitized solar cell. The unique nanostructure with the roughness factor of 90.6 provides a large effective surface area for dye adsorption. The experimental results showed that the dye molecules cover 39.7% of the TiO2 surface area which influences the performance of dye-sensitized solar cell. The electrochemical method provides the information of the coverage of dye molecules which is a key issue to optimize solar cell performance.
electrochemical analysis / aligned carbon nanofibers / dye adsorption / solar cell
Fig.3 (a) CV measurement in 0.1 M LiClO4 acetonitrile solution taken with a scan rate of 50 mV/s using a platinum coil as a counter electrode, a Ag/AgCl(sat’d KCl) reference electrode, the vertically aligned carbon nanofiber array coated with anatase TiO2 nanoneedles as the working electrode; (b) dye N719 absorption on the surface of vertically aligned carbon nanofiber array coated with anatase TiO2 nanoneedles as the working electrode |
Fig.4 (a) CV measurement in 0.1 M LiClO4 acetonitrile solution taken with a scan rate of 50 mV/s using a platinum coil as a counter electrode, a Ag/AgCl (sat’d KCl) reference electrode, the vertically aligned carbon nanofiber array coated with anatase TiO2 nanoneedles as the working electrode (blue line), dye N719 absorption on the surface of vertically aligned carbon nanofiber array coated with anatase TiO2 nanoneedles as the working electrode (red line); (b) CV measurement in 0.1 M LiClO4 acetonitrile solution taken with a scan rate of 50 mV/s, the vertically aligned carbon nanofiber array coated with anatase TiO2 nanoneedles as the working electrode (blue line), the vertically aligned carbon nanofiber array (black line); a glassy carbon working electrode (red line) |
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