Electrochemical characterization of TiO2/ZnO nanostructure based dye sensitized solar cell by impedance spectroscopy

ZnO nanostructure thin films were fabricated by various electrochemical deposition methods on TiO2 nanolayer substrates. Cyclic voltammetry (CV) and chronoamperometry were performed as deposition methods. The results were compared to optimize the deposition conditions. For studying morphology and electron transfer capability of ZnO layer, scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS) were carried out, respectively. The EIS analysis reveals that the electron transport properties varied at the various deposition times and methods. Consequently, the binary structure of TiO2/ZnO nanofilm indicates a superior material as compared to TiO2 nanoparticles for application in dye sensitized solar cells (DSSCs).

کلیدواژه ها:

Dye sensitized solar cell ، ZnO nanostructure ، Cyclic voltammetry ، Impedance spectroscopy ، Thin film ، Layer electrodeposition