JOURNAL OF ALLOYS AND COMPOUNDS | 卷:469 |
Size-controlled growth of well-aligned ZnO nanorod arrays with two-step chemical bath deposition method | |
Article | |
Yang, L. L.1  Zhao, Q. X.1  Willander, Magnus1  | |
[1] Linkoping Univ, Dept Sci & Technol ITN, SE-60174 Norrkoping, Sweden | |
关键词: ZnO nanorods; Chemical bath deposition; Optical properties; | |
DOI : 10.1016/j.jallcom.2008.08.002 | |
来源: Elsevier | |
【 摘 要 】
Well-aligned ZnO nanorod arrays (ZNAs) with different sizes in diameter were fabricated on Si substrates by two-step chemical bath deposition method (CBD), i.e. substrate pre-treatment with spin coating to form ZnO nanoparticles layer and CBD growth. The effects Of Substrate pre-treatments, pH, angel (theta) between substrate and beaker bottom and growth time (t) on the structure of ZNAs were investigated in detail by X-ray diffraction (XRD), field emission scan electronic microscope (SEM) and photoluminescence (PL). The results show that substrate pre-treatment, pH, theta and t indeed have great influence on the growth of ZNAs, and their influence mechanisms have been, respectively, explained in detail. The introduction of a ZnO nanoparticle layer on the substrate not only helps to decrease the diameter but also has a strong impact on the orientation of ZNAs. Under the growth condition of pH similar to 6, theta = 70 degrees and t = 2 h, the well-aligned ZnO nanorod arrays with 50 nm diameter was obtained on the pre-treated Si substrates. And only a strong UV peak at 385 nm appears in room temperature PL spectrum for this sample, which indicates that as-synthesized ZnO nanorods have a perfect crystallization and low density of deep level defects. (C) 2008 Elsevier B.V. All rights reserved.
【 授权许可】
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