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Article

Structural and Electrical Characterization of Pure and Al-Doped ZnO Nanorods

1
Faculty of Chemical Engineering and Technology, Marulićev trg 20, 10000 Zagreb, Croatia
2
Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia
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Author to whom correspondence should be addressed.
Academic Editor: Nikolaos Bouropoulos
Materials 2021, 14(23), 7454; https://doi.org/10.3390/ma14237454
Received: 18 November 2021 / Revised: 29 November 2021 / Accepted: 1 December 2021 / Published: 4 December 2021
(This article belongs to the Special Issue Wide Band Gap Semiconductors: From Growth to Applications)
Pure and Al-doped (3 at.%) ZnO nanorods were prepared by two-step synthesis. In the first step, ZnO thin films were deposited on silicon wafers by spin coating; then, ZnO nanorods (NR) and Al-doped ZnO NR were grown using a chemical bath method. The structural properties of zincite nanorods were determined by X-ray diffraction (XRD) and corroborated well with the morphologic properties obtained by field-emission gun scanning electron microscopy (FEG SEM) with energy-dispersive X-ray spectroscopy (EDS). Morphology results revealed a minute change in the nanorod geometry upon doping, which was also visible by Kelvin probe force microscopy (KPFM). KPFM also showed preliminary electrical properties. Detailed electrical characterization of pure and Al-doped ZnO NR was conducted by temperature-dependent current–voltage (I–V) measurements on Au/(Al)ZnO NR/n-Si junctions. It was shown that Al doping increases the conductivity of ZnO NR by an order of magnitude. The I–V characteristics of pure and Al-doped ZnO NR followed the ohmic regime for lower voltages, whereas, for the higher voltages, significant changes in electric conduction mechanisms were detected and ascribed to Al-doping. In conclusion, for future applications, one should consider the possible influence of the geometry change of (Al)ZnO NRs on their overall electric transport properties. View Full-Text
Keywords: ZnO nanorods; n-type doping; chemical bath synthesis; electrical transport mechanism; KPFM ZnO nanorods; n-type doping; chemical bath synthesis; electrical transport mechanism; KPFM
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MDPI and ACS Style

Panžić, I.; Capan, I.; Brodar, T.; Bafti, A.; Mandić, V. Structural and Electrical Characterization of Pure and Al-Doped ZnO Nanorods. Materials 2021, 14, 7454. https://doi.org/10.3390/ma14237454

AMA Style

Panžić I, Capan I, Brodar T, Bafti A, Mandić V. Structural and Electrical Characterization of Pure and Al-Doped ZnO Nanorods. Materials. 2021; 14(23):7454. https://doi.org/10.3390/ma14237454

Chicago/Turabian Style

Panžić, Ivana, Ivana Capan, Tomislav Brodar, Arijeta Bafti, and Vilko Mandić. 2021. "Structural and Electrical Characterization of Pure and Al-Doped ZnO Nanorods" Materials 14, no. 23: 7454. https://doi.org/10.3390/ma14237454

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