Construction and Evaluation of High-Quality n-ZnO Nanorod/p-Diamond Heterojunctions
Vertically-aligned ZnO nanorods (NRs) arrays were synthesized by a low-temperature solution method on boron-doped diamond (BDD) films. The morphology, growth direction, and crystallinity of the ZnO NRs were studied by scanning electron microscopy, X-ray diffraction and cathodoluminescence. Electrical characterization of the ZnO NR/BBD heterostructures revealed characteristic p–n junction properties with an on/off ratio of about 50 at±4 V and a small reverse leakage current ∼ 1 μA. Moreover, the junctions showed an ideality factor around 1.0 at a low forward voltage from 0 to 0.3 V and about 2.1 for an increased voltage ranging from 1.2 to 3.0 V, being consistent with that of an ideal diode according to the Sah-Noyce-Shockley theory.
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Document Type: Research Article
Publication date: 2012-06-01
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