氧化锌碳纤维复合结构制备及其紫外光响应性能研究

利用预处理的碳纤维为模板,在其表面磁控溅射氧化锌种子层,再通过水热法生长出氧化锌纳米棒,形成刷子状复合结构。轴心的碳纤维增强了材料的导电性能,同时该结构又具有较高的比表面积。将单根氧化锌/碳纤维转移到间距为180μm的金叉指电极上构建紫外光探测器,在325 nm激光照射下,该器件显示出约200倍的光电流增益,且具有良好的稳定性和光谱选择性。文中同时对响应机理进行了讨论。

Hybrid Structures of ZnO Nanorods/Carbon Fiber and Their Application on Ultraviolet Photodetector

Brush-like hierarchical ZnO nanostructures on carbon fiber was fabricated by RF magnetic sputtering method and hydrothermal growth. The hybrid structures showed high surface-to-volume ratio and better electrical conductivity. An individual carbon fiber coated ZnO nanorods was transferred to the Au interdigital electrodes to form an ultraviolet photodetector, and the spacing of the electrodes is 180μm. Under the illumination of 325 nm UV light, the device shows a high photocurrent gain of 200, a good stability and the spectral responsivities. Furthermore, the mechanism for UV response is discussed.