title: Quasi-photonic crystal effect of TiCl₃/electrolyte matrix in unipolar dye-absorber devices.
abstract: Effectiveness of TiCl3 pre- and post-treatments on dye-sensitized solar cells (DSCs) and interfacial charge-transfer properties were investigated. It was confirmed that a yield of current collection was strongly dependent on the position of the TiCl3/electrolyte matrix in the DSC configuration. The interfacial charge-transfer properties were studied using thermionic emission-diffusion process and electrochemical impedance spectroscopy analysis. The TiCl3/electrolyte matrix was considered to be a three-dimensional quasi-photonic crystal with a photonic band gap, which reinforces electric field and facilitates current collection from the TiCl3/electrolyte matrix to the FTO by accelerating electron motion, whereas the potential barrier blocks current collection from the TiO2 bulk region to the FTO and decreases current.
authors: Research Institute for Solar and Sustainable Energies, ‡School of Environmental Science and Engineering and §Ertl Center for Electrochemistry and Catalysis, Gwangju Institute of Science Technology , Gwangju 500-712, South Korea.
authors: Dong-Won
authors: DW
authors: Park
authors: Yonkil
authors: Y
authors: Jeong
authors: Thangapandi
authors: T
authors: PremKumar
authors: Jaeyoung
authors: J
authors: Lee