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Structural and morphological properties of ZnO: Ga thin films
Institute for Problems of Material Science, Krzhyzhanovskyy str. 3, 03142 Kiev, Ukraine, University of Oslo, Physics Department, Centre for Materials Science and Nanotechnology, N-0316 Oslo, Norway.
University of Oslo, Physics Department, Centre for Materials Science and Nanotechnology, N-0316 Oslo, Norway.
University of Oslo, Chemistry Department, Centre for Materials Science and Nanotechnology, N-0316 Oslo, Norway.
Institute for Problems of Material Science, Krzhyzhanovskyy str. 3, 03142 Kiev, Ukraine.
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2006 (English)In: Thin Solid Films, ISSN 0040-6090, E-ISSN 1879-2731, Vol. 515, no 2 SPEC. ISS., 472-476 p.Article in journal (Refereed) Published
Abstract [en]

Zinc oxide (ZnO) is a promising semiconductor material with a great variety of applications. Compared to undoped ZnO, impurity-doped ZnO has a lower resistivity and better stability. With this aim, Ga has been proposed as a dopant. In this study, the structural characteristics and surface morphology of ZnO films produced by PEMOCVD at a substrate temperature of 250 °C on the c-plane (001) of sapphire were investigated. Doping was realized with 1, 3, 5 and 10 wt.% of Ga2(AA)3 in the precursor's mixture. At lower contents, Ga stimulates growth of (002) oriented textured films and the smallest FWHM was obtained as low as 0.17° for ZnO:Ga with 1 wt.%. A change in preferential orientation as well as surface smoothing and roughness decreasing of the films were observed with further increasing Ga content in precursor's mixture. We assume a key role of Ga and note that such a feature would be beneficial for the application of ZnO thin films for formation of abrupt junctions in p-n device structures. © 2005 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
2006. Vol. 515, no 2 SPEC. ISS., 472-476 p.
Keyword [en]
AFM, PEMOCVD, XRD, ZnO doped by Ga
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:liu:diva-50103DOI: 10.1016/j.tsf.2005.12.269OAI: oai:DiVA.org:liu-50103DiVA: diva2:270999
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-12

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Yakimova, Rositsa

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