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Electron paramagnetic resonance signatures of Co2+ and Cu2+ in β-Ga2O3
Linköping University, Department of Physics, Chemistry and Biology, Surface Physics and Chemistry. Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0001-7640-8086
Justus-Liebig-University Giessen, Giessen, Germany.
Justus-Liebig-University Giessen, Giessen, Germany.
Justus-Liebig-University Giessen, Giessen, Germany.
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2019 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 115, no 24, article id 242101Article in journal, Letter (Refereed) Published
Abstract [en]

Gallium oxide (β-Ga2O3) is a wide-bandgap compound semiconductor with a bandgap of ∼4.9 eV that is currently considered promising for a wide range of applications ranging from transparent conducting electrodes to UV optoelectronic devices and power electronics. However, all of these applications require a reliable and precise control of electrical and optical properties of the material, which can be largely affected by impurities, such as transition metals commonly present during the growth. In this work, we employ electron paramagnetic resonance (EPR) spectroscopy to obtain EPR signatures of the 3d-transition metals Co2+ and Cu2+ in β-Ga2O3 bulk crystals and powders that were unknown so far. Furthermore, we show that both Co2+ and Cu2+ preferentially reside on the octahedral gallium lattice site.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2019. Vol. 115, no 24, article id 242101
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-162638DOI: 10.1063/1.5127651ISI: 000505734100009OAI: oai:DiVA.org:liu-162638DiVA, id: diva2:1377524
Note

Funding agencies:  Linkoping University; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University [2009 00971]

Available from: 2019-12-12 Created: 2019-12-12 Last updated: 2020-01-22Bibliographically approved

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