347393 Cu-Sb-S Nanoparticles As Counter Electrodes For Dye-Sensitized Solar Cells

Monday, November 4, 2013
Grand Ballroom B (Hilton)
Benjamin Tien, Chemical and Biological Engineering, Princeton University, Princeton, NJ

Nanocrystals of Cu3SbS4 have been synthesized and tested as counter electrode (CE) material for dye-sensitized solar cells (DSSC) to replace the efficient but expensive Pt catalyst. The fill factor of the fabricated devices using the synthesized Cu3SbS4 is considerably lower than that of Pt, indicating that the former has poor catalytic activity and may not be suitable as CE material in DSSC’s. This finding suggests that either the band gap (0.47 eV) or crystal structure of Cu3SbS4 gives the material its poor catalytic activity, providing insight into the relationship between the band gap of a CE material, its crystal structure, and its catalytic activity. Further investigation via synthesis and testing of other copper-antimony-sulfide stoichiometries will continue to elucidate this relationship and provide further understanding of the poor catalytic activity of Cu­3SbS4.

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