Size-controlled growth of well-aligned ZnO nanorod arrays with two-step chemical bath deposition method
2009 (English)In: Journal of Alloys and Compounds, ISSN 0925-8388, Vol. 469, no 1-2, 623-629 p.Article in journal (Refereed) Published
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 (θ) 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, θ 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 6, θ = 70° 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.
Place, publisher, year, edition, pages
2009. Vol. 469, no 1-2, 623-629 p.
ZnO nanorods, Chemical bath deposition, Optical properties
Atom and Molecular Physics and Optics
IdentifiersURN: urn:nbn:se:liu:diva-15532DOI: 10.1016/j.jallcom.2008.08.002OAI: oai:DiVA.org:liu-15532DiVA: diva2:117501
Original Publication:LiLi Yang, Qingxiang Zhao and Magnus Willander, Size-controlled growth of well-aligned ZnO nanorod arrays with two-step chemical bath deposition method, 2009, Journal of Alloys and Compounds, (469), 1-2, 623-629.http://dx.doi.org/10.1016/j.jallcom.2008.08.002Copyright: Elsevier Science B.V., Amsterdam.http://www.elsevier.com/2009-03-272008-11-142014-01-15Bibliographically approved