PHOTO PROPERTIES OF THE DYE-SENSITIZED METAL-OXIDE POWDER THICK-FILMS

Dye-sensitized indium oxide (In2O3) thick films were prepared by spin coating on ITO glass substrates and their photoelectronic properties w ere studied. A semitransparent aluminum electrode was vacuum deposited on the In2O3 film, and the photovoltaic effect and alcohol sensing be havior of the sandwich cells were examined. Two kinds of dyes, rose be ngale and brilliant green, were used as the dopant pigments. Rectifica tion behavior was observed in the photo and dark current-voltage chara cteristics for undoped and dye-sensitized cells. The doping of rose be ngale and brilliant green increased and decreased the current, respect ively, both in the dark and under light illumination. The rose bengale doped cell showed a moderate current decrease with adsorption of alco hols.