Abstract This work is focused on the study of dye-sensitized solar cells (DSSC) based on the semiconductor titanium dioxide (TiO 2 ) as electron conductor and the search for an appropriate organic sensitizer for TiO 2 . In this work, several natural sensitizers have been tested, including blackberries, hibiscus, spinach and grass and the relationship between anthocyanin and electron transfer was analyzed. The study points out the great potential of organic dyes. Particularly in blackberries it was reaching values around 300 mV owing to high concentrations of purple pigment due to the molecule called anthocyanin and the anchoring properties with the semiconductor studied.