Journal
CATALYSTS
Volume 12, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/catal12030264
Keywords
carbon xerogels; dye-sensitized solar cells; N-doping; S-doping; degradation
Categories
Funding
- PON Ricerca e Innovazione 2014-2020 [ARS01_00334]
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In this study, carbon xerogels doped with nitrogen or sulfur were investigated as counter electrodes for DSSCs. The introduction of heteroatoms such as nitrogen or sulfur led to improved efficiency compared to undoped material due to a decrease in charge transfer resistance.
In this work, carbon xerogels (CXGs) doped with nitrogen or sulfur have been investigated as DSSC counter electrodes. CXGs have been prepared by a sol-gel method from resorcinol and formaldehyde and subsequent carbonization. Nitrogen doping has been carried out by introducing melamine into the synthesis process along with resorcinol and formaldehyde, while sulfur has been incorporated by direct reaction of the carbon material with elemental sulfur. The counter electrodes for DSSCs have been prepared by airbrushing on conductive glass (fluorine-doped tin oxide, FTO), and their electrochemical behavior has been evaluated, observing that the introduction of heteroatoms such as nitrogen or sulfur leads to an improvement in efficiency compared to the undoped material thanks to a decrease in charge transfer resistance.
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