| 초록 |
A new carbon electrode prepared with an activated carbon(AC) was superior to a Pt sputtered electrode as the counter electrode of dye-sensitized solar cells. Cyclic voltammetry and impedance spectroscopy were used to investigate electrochemical properties of both AC electrode and Pt electrode. The photocurrent-voltage characteristics were influenced by both the roughness factor and the electrical resistance of the carbon counter electrode. The open-circuit voltage increased by about 50mV using the carbon counter electrode compared to the Pt counter electrode because of positive shift of the formal potential for iodide/triiode redox couple. Also, electrochemical properties of AC electrode was superior to that of Pt electrode on the basis on the measurement of CV and impedance data. |
