中文摘要：

以硅纳米孔柱阵列（Si-NPA）为衬底、用化学气相沉积法制备了具有规则阵列结构特征的ZnO/Si-NPA纳米复合体系,并对其结构和光致发光性质进行了表征.实验结果显示,组成ZnO/Si-NPA表面阵列的每个柱子均呈现层壳结构.不同于衬底Si-NPA的红光和蓝光发射,ZnO/Si-NPA在紫外光区和蓝绿光区呈现出两个强的宽发光峰.分析表明,紫外光发射应归因于ZnO晶体的带边激子跃迁;而蓝绿光发射则来自于ZnO晶体本征缺陷所形成的两类深能级复合中心上载流子的辐射跃迁.

英文摘要：

Regularly arrayed nanocomposite system of zinc oxide/silicon nanoporous pillar array （ZnO/Si-NPA） was prepared by chemical vapor deposition utilizing Si-NPA as substrate, and the corresponding structure and photoluminescence properties were characterized. Our experimental results disclosed that all the pillars of ZnO/Si-NPA have a core-shell structure. Different from the red and blue emission from Si-NPA, two strong and wide emission bands were observed in the ultraviolet and blue-green ranges. These emission bands are attributed to the band-edge exciton transition of ZnO crystallites and two kinds of deep-level transitions originating from its intrinsic defects.