We describe the use of citric acid as co-adsorbent in Dye Solar Cells (DSC). As we demonstrate herein, it is possible to increase the photocurrent of DSC without loosing photovoltage when we employed cis-dithiocyanato(4,4-dicarboxy-2,2-bipyridine)(1,10-phenanthroline) ruthenium (II) (AR20). Moreover, we show that the dye molecular structure also plays a major role due to its interaction with the sensitizer.