Figure 4From: Fabrication and characterization of hexagonally patterned quasi-1D ZnO nanowire arraysPL spectra. Room-temperature PL spectra of (a) the hexagonally patterned ZnO nanowire arrays and (b) ZnO buffer, respectively. Two peaks attributed to extionic recombination (IUV) and defect-related emission (IDL) are clearly seen. (c) The variation of UV-to-DL emission intensity ratio (IUV/IDL) of ZnO samples.Back to article page