Influence of Nitrogen and Sulfur Doping of Carbon Xerogels on the Performance and Stability of Counter Electrodes in Dye Sensitized Solar Cells

In this work, carbon xerogels (CXGs) doped with nitrogen or sulfur have been investigated as DSSC counter electrodes. CXGs prepared by a sol–gel method from resorcinol and formaldehyde subsequent carbonization. Nitrogen doping has carried out introducing melamine into the synthesis process along formaldehyde, while incorporated direct reaction of material elemental sulfur. The electrodes for DSSCs airbrushing on conductive glass (fluorine-doped tin oxide, FTO), their electrochemical behavior evaluated, observing that introduction heteroatoms such leads to an improvement in efficiency compared undoped thanks decrease charge transfer resistance.