Dye-Sensitized Nanostructured TiO2 Film Based Photoconductor

TL;DR

This paper demonstrates that dye-sensitized nanoporous TiO2 films can function as wavelength-dependent photoconductors, with conductivity influenced by light intensity, wavelength, and voltage, suggesting potential applications in optoelectronic devices.

Contribution

It introduces a novel use of dye-sensitized nanoporous TiO2 films as wavelength-dependent photoconductors, expanding their application scope.

Findings

Conductivity depends on light intensity, wavelength, and voltage.

Dye-sensitized TiO2 films exhibit wavelength-dependent photoconductivity.

The structure can be used in optoelectronic applications.

Abstract

Grooves were etched in a conductive layer of a conductive, transparent glass, and a nanoporous TiO2 film was deposited on both the conductive and nonconductive area. The width of the grooves was 100 $\mu$m and 150 $\mu$m. A transparent TiO2 film was dye-sensitized, covered with an electrolyte, and sandwiched with a cover glass. The conductivity of the dye-sensitized TiO2 film permeated with electrolyte was studied in the dark and under illumination, and was observed to be dependent on light intensity, wavelength and applied voltage. This study shows that dye-sensitized nanoporous films can be used as a wavelength dependent photoconductor.