Compact and vertically-aligned ZnO nanorods thin filmsby the low-temperature solution method

• Main Authors: Chang-Hung Li, 李長紘
• Other Authors: Chu-Chi Ting
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/08244404497040345131

碩士 === 國立中正大學 === 光機電整合工程所 === 97 === In this thesis, ZnO nanorods were fabricated by two-step process. In the first instance, the substrate was pre-coated seed layer by sol-gel spin-coating method before growing nanorods . Secondly, ZnO nanorods were synthesized by Chemical bath deposition (CBD). We improved the method by replacing the solution several times in relays, called multiable-step growth, without grown in once as the article reported in usual. Highly c-axis-oriented ZnO nanorods thin films were obtained on substrates by SEM, XRD and transmittance spectra. The most compact and vertically-aligned ZnO nanorods thin film with the thickness of ~780 nm and average hexagonal grain size of ~200 nm exhibited the average visible transmittance 85%, refractive index 1.74, and packing density 0.84 was fabricated under the optimum parameters: 0.05 M, 75 °C, 6 h, multiple-stepwise solution-growth route, and ZnO seed layer with an average grain size of ~20 nm. As we demonstrate here, the technique is easily controlled, low temperature, and low cost, and can be used to produce large-scale high quality optical thin films.