Large-Pore Sized Polyhedral Carbon Nanofoams as Counter Electrodes for Dye-Sensitized Solar Cells
(English)Manuscript (preprint) (Other academic)
Polyhedral carbon nanofoams (PNF-C) of large mesoporous pore sizes were prepared using a hard-templating method and then investigated as low-temperature counterel ectrode materials in dye-sensitized solar cell (DSC). Photovoltaic parameters comprising short-circuit current (ISC), open-circuit voltage (VOC), fill factor (FF) and an overall light-to-electron conversion efficiency were evaluated for the fabricated cells. The superior structural features of the carbon foam materials; including large hollow mesoporous cells, large surface area and interconnected 3D framework; allow fast mass transport and enhanced activity toward I3- reduction as compared to microporous carbon counter electrode, used as a reference. Electrochemical Impedance Spectroscopy (EIS) analysis revealed decreased charge transfer resistance at the PNF-C counter electrode/electrolyte surface, thus improved energy conversion efficiency of 3.0 % in comparison with the standard carbon electrode of 1.3 %.
IdentifiersURN: urn:nbn:se:kth:diva-27156OAI: oai:DiVA.org:kth-27156DiVA: diva2:375079
QC 201012072010-12-072010-12-072010-12-08Bibliographically approved