Fabrication and optical properties of Sb-doped CdS nanowires

Sb-doped CdS nanowires with an average diameter of 30 nm and lengths of up to 20–30 μm are fabricated by chemical vapor approach. The as-synthesized products have a single-crystal phase and grow along the <011> direction. The growth of Sb-doped CdS nanowires is suggested for Quasi-vapor-solid mechanism (QVSM). In particular, the PL spectra show enhancing emission peaks that strongly shift to long wavelength (up to 55 nm redshift) with a doping Sb where Sb-doped CdS nanowires are found to be responsible for the different characteristics. The PL mechanism is explained in detail.