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Fabrication of Au/ZnO Schottky Nanodiode Using Mesoporous Silica Film as Template

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Au/ZnO Schottky nanodiode is prepared by two-step electrodeposition, using mesoporous silica (MPS) film as template. Nano-ZnO is firstly deposited in the pores of MPS film, which achieves enhanced conductivity and enables continued electrodeposition of Au to form an Au/ZnO Schottky nanodiode. Current–voltage (I–V) curves of Au/ZnO nanodiode are recorded under a switched UV-light with the wavelength of 365 nm. The characteristic I–V curves show rectifying behavior in the dark, and present more linear Ohmic response upon UV exposure, which might be caused by the lowered Schottky barrier height and narrowered Schottky barrier width. In addition, fast increased forward-current and lowered breakdown voltage are observed from I–V curves of Au/ZnO Schottky nanodiode. The ideality factor of the Au/ZnO Schottky diode is determined to be ∼8. These results suggest a different photocurrent-generation process, and provide experimental support to the model proposed in ultrasmall Schottky diodes.


Document Type: Research Article


Publication date: August 1, 2007

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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