The influence of the incorporation of nitric acid-treated (functionalized) multi-walled carbon nanotubes (f-MWCNTs) and unmodified MWCNTs in TiO2 films are investigated by observing the photocurrent-voltage characteristics of dye-sensitized solar cells (DSSCs) with and without MWCNTs. The short-circuit photocurrent (J sc) of the modified DSSC increased by 46% compared with that of a cell with plain TiO2 film. The open-circuit voltage remained the same for all cases. The enhanced J sc is explained by the increased surface area of the film, enhanced cluster formation of TiO2 particles around f-MWCNTs, and improved interconnectivity of TiO2 particles in the presence of f-MWCNTs. The efficiency of the cell increased by 45% due to J sc enhancement.
Dr. Sreekala C. O., Roy, M. S., .S.Sreelatha, K., Kumar, K. B. S. P., and Jinchu, I., “Functionalized Multi Walled Carbon Nanotubes (MWCNTs) for enhanced Photocurrent in Dye Sensitized Solar Cells”, Journal Of Nanostructure in Chemistry, vol. 3, 2013.