Selective alignment of dyes for panchromatic dye-sensitized solar cells

We have developed methodology to position three different dyes on the desired site in a mesoporous TiO₂ film based on column chromatographic principle. The alignment of yellow, red and green dyes in the TiO₂ layer was monitored by EPMA. Selective positioning of three dyes exhibited broad spectral response, i.e., panchromatic absorption, compared to the single dyes cell, as a result three dyes cell showed higher photocurrent density. Electron transport, however, was not inhibited by three dyed structure.