Thermal stability of the prominent compensating (Al-Zn-V-Zn) center in ZnO
2016 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 119, no 10, 105702- p.Article in journal (Refereed) PublishedText
Electron paramagnetic resonance spectroscopy is used to investigate the thermal stability of the Aluminum-Zinc vacancy (Al-Zn-V-Zn) complex created in bulk single crystalline ZnO by room temperature electron irradiation with an energy of 1.2 MeV. Two different stages in the annealing process at 160 and 250 degrees C with apparent activation energies of E-A1 = 1.5 +/- 0.2 eV and E-A2 = 1.9 +/- 0.2 eV, respectively, are observed. The second stage leads to the complete annealing out of the (Al-Zn-V-Zn) complex and is accompanied by restoration of the concentration of the AlZn shallow donor centers to its initial value in as-grown (i.e., not irradiated) material. The obtained results prove that the (Al-Zn-V-Zn) complex is the dominant acceptor responsible for compensation of n-type-dopants in the studied Al-containing ZnO samples. (C) 2016 AIP Publishing LLC.
Place, publisher, year, edition, pages
AMER INST PHYSICS , 2016. Vol. 119, no 10, 105702- p.
IdentifiersURN: urn:nbn:se:liu:diva-127440DOI: 10.1063/1.4943263ISI: 000372976900033OAI: oai:DiVA.org:liu-127440DiVA: diva2:925216
Funding Agencies|Swedish Research Council [621-2010-3971]; Linkoping Linnaeus Initiative for Novel Functional Materials (LiLI-NFM) - Swedish Research Council [2008-6582]; Norwegian Research Council through the FRINATEK program (WEDD project)2016-04-302016-04-262016-04-30