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Properties of shallow donors in ZnMgO epilayers grown by metal organic chemical vapor deposition
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, The Institute of Technology.
2014 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 116, no 18, 183508- p.Article in journal (Refereed) Published
Abstract [en]

High quality Zn1-xMgxO epilayers have been grown by means of metal organic chemical vapor deposition technique on top of ZnO templates. The grown samples were investigated by x-ray photoelectron spectroscopy and photoluminescence. The magnesium (Mg) concentration was varied between 0% and 3% in order to study the properties of shallow donors. The free and donor bound excitons could be observed simultaneously in our high quality Zn1-xMgxO epilayers in the photoluminescence spectra. The results indicate that both built-in strain and Mg-concentration influence the donor exciton binding energy. It clearly shows that the donor exciton binding energy decreases with increasing Mg-concentration and with increasing built-in strain. Furthermore, the results indicate that the donor bound exciton transition energy increases with decreasing strength of the built-in strain if the Mg-concentration is kept the same in the Zn1-xMgxO epilayers.

Place, publisher, year, edition, pages
American Institute of Physics (AIP) , 2014. Vol. 116, no 18, 183508- p.
National Category
Electrical Engineering, Electronic Engineering, Information Engineering Chemical Sciences
Identifiers
URN: urn:nbn:se:liu:diva-113011DOI: 10.1063/1.4902007ISI: 000345216300017OAI: oai:DiVA.org:liu-113011DiVA: diva2:779010
Available from: 2015-01-12 Created: 2015-01-08 Last updated: 2017-12-05

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