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Wide Band Gap Semiconductors: From Growth to Applications

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Materials Physics".

Deadline for manuscript submissions: closed (20 July 2022) | Viewed by 2792

Special Issue Editors


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Guest Editor
i3N, Department of Physics, University of Aveiro, Campus Santiago, 3810-193 Aveiro, Portugal
Interests: DFT; modelling; first principles calculations; semiconductors
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia
Interests: advanced systems; thin-films; electrical characterization; defect engineering; DLTS
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The development of efficient and environmentally friendly semiconductor devices is a great challenge. Among the materials of present and future perspective are wide bandgap semiconductor materials. The recent progress in crystal growth, theoretical modeling, understanding of as-grown and/or intentionally introduced defects, and numerous applications has offered a new perspective for wide bandgap semiconductors such as SiC, GaN, Ga2O3, diamond, and others.

This Special Issue of Materials is dedicated to all aspects related to the growth, material characterization, modeling, and applications of wide bandgap semiconductors with the aim to provide an overview of the issues of current interest and future perspectives. Researchers working in the field are invited to contribute.

Potential topics of interest include but are not limited to the following: growth and characterization techniques of crystalline materials; wide bandgap semiconductors; SiC, GaN, Ga2O3, diamond; device applications; modeling, first-principles calculations, etc.; deep level transient spectroscopy; electron paramagnetic resonance.

Dr. José Coutinho
Dr. Ivana Capan
Guest Editors

Manuscript Submission Information

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Keywords

  • Wide bandgap semiconductors
  • Defects
  • Devices
  • Modeling
  • Characterization

Published Papers (1 paper)

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Research

12 pages, 2317 KiB  
Article
Structural and Electrical Characterization of Pure and Al-Doped ZnO Nanorods
by Ivana Panžić, Ivana Capan, Tomislav Brodar, Arijeta Bafti and Vilko Mandić
Materials 2021, 14(23), 7454; https://doi.org/10.3390/ma14237454 (registering DOI) - 4 Dec 2021
Cited by 7 | Viewed by 2101
Abstract
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 [...] Read more.
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. Full article
(This article belongs to the Special Issue Wide Band Gap Semiconductors: From Growth to Applications)
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