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Enhanced Photoelectrochemical Properties of CdS/ZnO Supported on Carbon Nanotube Films

A major hurdle to the broad application of solar cells is the low efficiency of converting the energy of sunlight to electrical energy. One of the most promising methods for the improvement of the efficiency is to provide a path for photo-generated electrons and thus reduce the probability of exciton decay and recombination. Due to unique chemical and physical properties, carbon nanotubes have been employed as electrodes to improve the efficiency [14]. In this study, we utilized a facile vacuum-filtration method to fabricate a film of multi-layer CdS/ZnO/carbon nanotubes on ITO substrates and investigated the effects of single-walled carbon nanotubes (SWCNTs) and mutiwalled carbon nanotubes (MWCNTs) on the photoelectrochemical properties of ZnO and CdS particles.