Luminescence property and synthesis of sulfur-doped ZnO nanowires by electrochemical deposition

摘要

Sulfur-doped zinc oxide (ZnO) nanowires have been successfully synthesized by an electric field-assisted electrochemical deposition in porous anodized aluminum oxide template at room temperature. The structure, morphology, chemical composition and photoluminescence properties of the as-synthesized ZnO:S nanostructures were investigated. X-ray diffraction and the selected area electron diffraction results reveal that the as-synthesized products are single phase with hexagonal wurtzite structure with a highly preferential orientation in the (101) direction. Transmission electron microscopy observations indicate that the nanowires are uniform with an average diameter of 70 nm and length up to several tens of micrometers. X-ray photoelectron spectroscopy further reveals the presence of S in the ZnO nanowires. Room-temperature photoluminescence (PL) is observed in the sulfur-doped ZnO nanowires which exhibits strong near-band-edge (NBE) ultraviolet peaks at 378 nm and 392 nm and week green emissions at 533 nm and 507 nm. A blue emission at 456 nm and violet emissions at around 406, 420 and 434nm were also observed in the PL spectrum for the as-synthesized ZnO:S nanowires. The result of the PL spectrum showed that S-doping had an obvious effect on the luminescence property of typical ZnO nanowires.