关键词: ZnO纳米线, PL光谱, 发光增强, Au表面等离激元共振, 退火

Abstract: ZnO nanowires were grown through CVD method, and SEM, TEM and PL spectroscopy system were used to characterize its morphology, crystal structure and optical properties. Due to the effect of Au SPR on ZnO nanowire, its PL spectra increased by 20 times at the UV region and decreased remarkably at the green region when it was coated by Au film. Through the annealing experiments, the competition mechanism between intrinsic transition and defect transition in ZnO material proved to be of great effect on its PL spectra. The results showed that the intrinsic transition of annealed ZnO nanowire decreased remarkably, while its defect transition increased. When coated by Au film, the PL spectra of annealed ZnO nanowire increased by almost 30 times at the UV region. The improvements are more remarkable than those reported results.

Key words: ZnO nanowire, PL spectra, light emission enhancement, Au surface plasmon resonance, annealing