Fabrication of UV detectors based on ZnO nanowires using silicon microchannel |
| |
Authors: | JP Kar SN Das JH Choi YA Lee TY Lee JM Myoung |
| |
Institution: | 1. Information and Electronic Materials Research Laboratory, Department of Materials Science and Engineering, Yonsei University, 134 Shinchon-Dong, Seoul 120-749, Republic of Korea;2. Nanobio Fusion Device Laboratory, Department of Electrical and Electronic Engineering, Yonsei University, 134 Shinchon-Dong, Seoul 120-749, Republic of Korea |
| |
Abstract: | Aligned ZnO nanowires were grown by metal organic chemical vapor deposition on patterned silicon substrate. The shape of nanostructures was greatly influenced by the micropatterned surface. The aspect ratio, packing fraction and the number density of nanowires on top surface are around 10, 0.8 and 107 per mm2, respectively, whereas the values are 20, 0.3 and 5×107 per mm2, respectively, towards the bottom of the cavity. XRD patterns suggest that the nanostructures have good crystallinity. High-resolution transmission electron microscopy confirmed the single-crystalline growth of the ZnO nanowires along the 0 0 0 1] direction. Photosensitivity of the nanowires, grown on both top and bottom surface of the microchannel, was observed. However, the nanowires grown on bottom surface have shown better UV response with base line recovery at dark condition. |
| |
Keywords: | 78 55 Et 81 15 Gh 61 46 Km 85 60 Gz |
本文献已被 ScienceDirect 等数据库收录! |
|