Abstract
Well‐ordered CdTe/TiO2 heteronanostructure arrays are fabricated via a convenient anodic aluminum oxide template‐directed approach and applied to photoelectrochemistry and solar energy devices. Both the CdTe and TiO2 present a decent crystalline quality. In comparison to the photoanode with only TiO2 nanotube array, the CdTe/TiO2 heteronanostructure electrodes possess a dramatic performance improvement.