Bicomponent WO 3 / TiO2 Films as Photoelectrodes

An analysis of the capability of porous rungsten trioxide films as a material for photocurrent generation was performed. The photogeneration properties of single‐component and films and bicomponent films were compared. The morphology, structure, fundamental absorption edge, flatband potential, vibration spectra, and photocurrent response of the amorphous films and nanocrystalline films were measured. We found that in bicomponent films, the porous films of the tungsten trioxide with a high open surface area can serve as substrates for nanocrystalline films to increase the efficiency of photocurrent generation at bandgap excitation. © 1999 The Electrochemical Society. All rights reserved.