Abstract
ZnxCd1-xSe quantum dot-sensitized TiO2 nanotube (TiO2 NT) array photoelectrodes were synthesized employing successive ionic layer adsorption and reaction (SILAR) technique. The influence of the number of deposition cycles and post-deposition annealing temperature on photoelectrochemical properties and stability behavior of photoanodes was investigated. The photoanodes were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) techniques. Photoelectrochemical measurements indicated that TiO2 NTs coupled with ZnCdSe quantum dots synthesized with 7 SILAR cycles, annealed at 400oC for 1hr under N2 atmosphere exhibited excellent photoelectrochemical properties. The high and stable photocurrent produced demonstrates the potential of ZnxCd1-xSe/TiO2 heterostructure as an efficient photoanode.
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