Preparation of CdS nanorods on silicon nanopillars surface by hydrothermal method

Cadmium sulfide (CdS) nanorods are fabricated on Silicon (Si) nanopillars surface via hydrothermal reaction method for the first time. To optimize the growth condition, the thickness of CdS seed film, temperature and time of hydrothermal reaction are researched in this work. It is found that 30–60 nm seed layer at the 180 °C for 5 h is the optimal condition for CdS nanorods growth on Si nanopillars surface. The energy dispersive spectroscopy results show that Cd and S elements with a ratio of 1:1.02 is in agreement with the stoichiometric composition of CdS. The X-ray diffraction curves indicate that the CdS nanorods are well crystallized on Si nanopillars substrate. The CdS nanorods can reduce the reflection and increase the absorption of the incoming light obviously. And the CdS nanorods-Si nanopillars structure has obvious photosensitive effect, which has great potential in the field of photoelectric.