| 초록 |
This study examined the characterization of nanoporous structured carbon/titanium dioxide composites and its application to dye-sensitized solar cells. TEM of nanoporous structured carbon revealed nanopore sizes of 2.0~3.0 nm with a regular hexagonal form. When nanoporous structured carbon was mixed to P-25 TiO2 particles (Degusa, P-25, 20-70 nm) and then was applied to DSSC, the energy conversion efficiency was enhanced considerably compared with that using nanometer sized pure TiO2: the energy conversion efficiency of the DSSC prepared from nanoporous carbon/P-25 TiO2 composites was approximately 8.94%, compared to 2.29% using pure P-25 TiO2. We confirmed from FT-IR spectroscopy that the dye molecules were attached perfectly to the surface and more was absorbed on the nanoporous structured carbon than on the nano-sized TiO2 particles. Electrostatic force microscopy (EFM) |
