Single-walled carbon nanotubes (SWNTs) and C 60-encapsulated SWNTs (C 60@SWNTs) are introduced to Rusensitized photoelectrochemical cells (PECs), and photocurrents are compared between two cells, i.e., an RuL2(NCS)2/DAPV/SWNTs/ITO cell and an RuL 2(NCS) 2/DAPV/ C 60@SWNTs/ITO cell. [L = 2,2'-bipyridine-4,4'-dicarboxylic acid, DAPV = di-(3-aminopropyl)-viologen, and ITO = indium-tin oxide] The photocurrents are increased by 70.6% in the presence of C 60@SWNTs. To explain the photocurrent increase, the reverse-field emission method is used, i.e., RuL 2 (NCS)2/DAPV/SWNTs/ITO cell (or RuL 2 (NCS) 2/DAPV/ C 60@SWNTs/ITO cell) as an anode and a counter electrode Pt as a cathode in the external electric field. The improved field emission properties, i.e., β (field enhancement factor) and emission currents in the reverse-field emission with C 60@SWNTs indicate the enhancement of the PEC electric field, which implies the improvement of the electron transfer rate along with the reduced charge recombination in the cell.
CITATION STYLE
Lee, J., Park, T., Lee, J., Jang, M., Lee, S., Kim, H., … Yi, W. (2012). Enhancement of photocurrent generation by C 60-encapsulated single-walled carbon nanotubes in ru-sensitized photoelectrochemical cell. Bulletin of the Korean Chemical Society, 33(8), 2689–2693. https://doi.org/10.5012/bkcs.2012.33.8.2689
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