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Title: Enhanced photoelectrochemical performance of bridged ZnO nanorod arrays grown on V-grooved structure
Authors: Wei, Yuefan
Ke, Lin
Leong, Eunice Sok Ping
Liu, Hong
Liew, Laura-Lynn
Teng, Jing Hua
Du, Hejun
Sun, Xiaowei
Keywords: DRNTU::Engineering::Electrical and electronic engineering
Issue Date: 2012
Source: Wei, Y., Ke, L., Leong, E. S. P., Liu, H., Liew, L. L., Teng, J. H., et al. (2012). Enhanced photoelectrochemical performance of bridged ZnO nanorod arrays grown on V-grooved structure. Nanotechnology, 23(36).
Series/Report no.: Nanotechnology
Abstract: Bridged ZnO nanorod arrays on a V-grooved Si(100) substrate were used as the photoanode of a photoelectrochemical (PEC) cell for water splitting. Photolithography followed by reactive ion etching was employed to create a V-grooved structure on a Si substrate. ZnO nanorod arrays were grown via a hydrothermal method. The light trapping and PEC properties are greatly enhanced using the bridged ZnO nanorod arrays on a V-grooved Si substrate compared with those on a flat one. Increased short circuit photocurrent density (JSC, 0.73 mA cm−2) and half-life time (1500 s) are achieved. This improved JSC and half-life time are 4 times and 10 times, respectively, higher than those of the ZnO nanorod arrays grown on a flat substrate. The overall PEC cell performance improvement for the V-groove grown ZnO array is attributed to the reduced light reflection and enhanced light trapping effect. Moreover, V-groove ZnO showed stronger adhesion between ZnO nanorod arrays and the substrate.
Rights: © 2012 IOP Publishing Ltd. This is the author created version of a work that has been peer reviewed and accepted for publication by Nanotechnology, IOP Publishing Ltd. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
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