Choi، نويسنده , , Hongsik and Nahm، نويسنده , , Changwoo and Kim، نويسنده , , Jongmin and Moon، نويسنده , , Joonhee and Nam، نويسنده , , Seunghoon and Jung، نويسنده , , Dae-Ryong and Park، نويسنده , , Byungwoo، نويسنده ,
In order to prevent the charge recombination at the interface between the transparent-conducting oxide (TCO) substrate and electrolyte, a TiO2 compact layer was deposited on the substrate by hydrolysis of TiCl4 aqueous solution. Optimum thickness of the compact layer was found to be ∼25 nm, which showed ∼24% increase in the power-conversion efficiency compared with the bare cell. Impedance spectra indicated that the interfacial charge-transfer resistance of TCO/electrolyte interface was increased by more than a factor of three with the TiO2 compact layer at 0.4 V. Moreover, the electron-carrier lifetime of the 25 nm-deposited cell was improved by a factor of five compared with the bare cell.
TiCl4 treatment , solar cells , Dye-sensitized solar cells , Compact layer , Blocking layer