Investigation of Temperature and Aging Effects in Nano structured Dye Solar Cells Studied by Electrochemical Impedance Spectroscopy

Effects of aging and cyclically varying temperature on the electrical parameters of dye solar cells were analyzed with electrochemical impedance spectroscopy. Photo electrode total resistance increased as a function of time due to increasing electron transport resistance in the TiO2 film. On the other hand, photo electrode recombination resistance was generally larger, electron lifetimes in the TiO2 were film longer, and charge transfer resistance on the counter electrode was smaller after the temperature treatments than before them. These effects correlated with the slower deterioration rate of the temperature-treated cells, in comparison to the reference cells.