A NEW APPROACH TO ALTERNATIVE COUNTER ELECTRODE FOR A NOVEL TYPE OF SOLAR CELL

摘要

Dye-fixed TiO2 films and doubly layered Fe2O3 films were prepared and used in solar cells. For the both cells a single walled carbon nanotube (SWNT) film, prepared by simply pasting over ITO glass, was used as a counter electrode. A stable current (I)-Voltage (V) curve was found under UV-visible light irradiation using KI+I2 in water as an electrolyte. A comparison of I-V curves between Pt and SWNT films has been made. Under UV visible light irradiation almost similar results were found for both Pt and SWNT films. In the case of Fe2O3, the open circuit voltage was found to be low (about 90 mV) but the short circuit current was found to be comparatively high (about 0.75 mA cm-2) whereas those for the Eosin Y (EY)-fixed TiO2 film with the SWNT film as a counter electrode, were found to be 350 mV and 0.27 mA cm-2, respectively.