| 초록 |
Dye-sensitized solar cells are regarded as a regenerative low-cost alternative to traditional photovoltaic devices based on the p-n junction diode. In nanoparticle-based DSSCs, electron transport at the interface between nanoparticles and their disordered geometrical paths are limiting factors for achieving higher efficiency. In this study, we present a new strategy to construct a photoelectrode having the TiO2 film prepared on polystyrene monolayer template by RF-sputtering deposition. The TiO2 film(ca. 2㎛ thickness) looks like an array of igloos with holes and provide effective paths for electron transport because it has an ordered geometrical structure and a dense crystalline structure compared to TiO2 nanoparticles. In order to improve the photocurrent, we treated the TiO2 film with TiCl4. The incident photon-to-current conversion efficiency was enhanced from 34.96% to 48.37% by TiCl4 treatment and the photoconversion efficiency shows 3.49% under AM 1.5 illumination. |
