title: Electron transport analysis for improvement of solid-state dye-sensitized solar cells using poly(3,4-ethylenedioxythiophene) as hole conductors.
abstract: Dye-sensitized solar cells (DSCs) using solid-state hole conductor, poly(3,4-ethylenedioxythiophene) (PEDOT), were fabricated using in-situ photoelectrochemical polymerization giving short-circuit photocurrent density of 3.20 mA cm-2, open-circuit voltage of 0.77 V, and fill factor of 0.50, and the resulting overall conversion efficiency of 1.25% on average under air mass 1.5 conditions. Furthermore, the electron transport properties of the DSCs based on PEDOT (PEDOT/DSCs) were analyzed using light intensity modulation induced photocurrent and photovoltage decay (SLIM-PCV) measurements and electrochemical impedance spectroscopy (EIS) measurements, and then compared to those of the DSCs based on organic liquid electrolyte containing I-/I3- as redox couple (liquid iodide/iodine electrolyte-DSCs, iodide/DSCs for short). The effective filling of PEDOT in the mesopores of dyed TiO2 layers is an important key to achieve the respectable conversion efficiency of PEDOT/DSCs that is comparable with iodide/DSCs.
authors.affiliation: Material and Life Science, Graduate School of Engineering, and Center for Advanced Science and Innovation, Osaka University, Suita, Osaka 565-0871, Japan.
authors.forename: Norihiro
authors.initials: N
authors.lastname: Fukuri
authors.forename: Naruhiko
authors.initials: N
authors.lastname: Masaki
authors.forename: Takayuki
authors.initials: T
authors.lastname: Kitamura
authors.forename: Yuji
authors.initials: Y
authors.lastname: Wada
authors.forename: Shozo
authors.initials: S
authors.lastname: Yanagida