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Efficient Auger Charge-Transfer Processes in ZnO
Linköping University, Department of Physics, Chemistry and Biology, Surface Physics and Chemistry. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0001-7640-8086
Linköping University, Department of Physics, Chemistry and Biology, Surface Physics and Chemistry. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0001-9421-8411
Univ Oslo, Norway.
Linköping University, Department of Physics, Chemistry and Biology, Surface Physics and Chemistry. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0001-7155-7103
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2018 (English)In: Physical Review Applied, ISSN 2331-7019, Vol. 9, no 5, article id 054014Article in journal (Refereed) Published
Abstract [en]

Photoluminescence and magneto-optical measurements are performed on a line peaking at 3.354 eV (labeled as NBX) in electron-irradiated ZnO. Even though the energy position of the NBX line is close to that for bound excitons in ZnO, it has distinctively different magneto-optical properties. Photoelectron paramagnetic resonance measurements reveal a connection and a charge-transfer process involving NBX and Fe and Al centers. The experimental results are explained within a model which assumes that the NBX is a neutral donor bound exciton at a defect center located near a Fe impurity and an Auger-type charge-transfer process occurs between NBX and Fe3+. While the NBX dissociates, its hole is captured by an excited state of Fe3+ and the released energy is transferred to the NBX electron, which is excited to the conduction band and subsequently trapped by a substitutional Al-zn shallow donor.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2018. Vol. 9, no 5, article id 054014
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-148389DOI: 10.1103/PhysRevApplied.9.054014ISI: 000433001000003OAI: oai:DiVA.org:liu-148389DiVA, id: diva2:1218604
Note

Funding Agencies|Swedish Energy Agency [43522-1]; Research Council of Norway; University of Oslo [251131]

Available from: 2018-06-14 Created: 2018-06-14 Last updated: 2019-06-28

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Stehr, Jan EricChen, ShulaBuyanova, IrinaChen, Weimin
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