| Title |
Electrochemical Impedance Spectroscopy Analysis on the Dye-sensitized Solar Cell with Different TiO_2 thicknesses |
| Authors |
김희제(Kim, Hee-Je) ; 이정기(Lee, Jeong-Gee) ; 서현웅(Seo, Hyun-Woong) ; 손민규(Son, Min-Kyu) ; 김진경(Kim, Jin-Kyoung) ; 프라바카르(Prabalkar, K.) ; 신인영(Shin, In-Young) |
| Keywords |
DSC(Dye-sensitized Solar Cell) ; TiO_2 thickness ; EIS(Electrochemical Impedance Spectroscopy) analysis ; Electron life time |
| Abstract |
Dye-sensitized solar cell(DSC) is composed of a dye-adsorbed nanoporous TiO_2 layer on fluorine-doped tin oxide(FTO) glass substrate, electrolyte, and platinium doped counter electrode. Among these, a dye-absorbed nanoporous TiO_2 layer plays an important role in the performance of the DSC because the injected electrons from excited dye molecules move through this layer. And the condition of TiO_2 layer such as the morphology and thickness affects on the electron movement. Therefore, the performances and the efficiency of DSC change as the thickness of TiO_2 layer is different. Electrochemical Impedance Spectroscopy(EIS) is the powerful analysis method to study the kinetics of electrochemical and photoelectrochemical processes occurring in the DSC especially the injected electron movements. So we analyzed the DSCs with different TiO_2 thicknesses by using EIS to understand the influence of the TiO_2 thickness to the performance of the DSC clearly. Finally, we got the EIS analysis on the DSC with different TiO_2 thickness from the internal resistance of the DSC, the electron life time and the amount of dye molecules. |