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Interaction between Na and Li in ZnO
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2009 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 95, no 24Article in journal (Refereed) Published
Abstract [en]

The interaction between group-Ia elements in ZnO have been studied by implanting Na into hydrothermally grown ZnO samples containing similar to 4x10(17) Li/cm(3) and employing secondary ion mass spectrometry for sample analysis. Postimplantation annealing above 500 degrees C results in a diffusion of Na and concurrently Li is efficiently depleted from the regions occupied by Na. The data show unambiguously that Na and Li compete for the same trapping site and the results provide strong experimental evidence for that the formation energies of Na on Zn site together with that of interstitial Li are lower than those of Li on Zn site and interstitial Na in highly resistive ZnO. This conclusion is also supported by recent theoretical estimates of the formation energies of these species as a function of the Fermi-level position in ZnO.

Place, publisher, year, edition, pages
2009. Vol. 95, no 24
Keyword [en]
annealing, diffusion, Fermi level, II-VI semiconductors, interstitials, ion implantation, lithium, secondary ion mass spectra, semiconductor, doping, sodium, wide band gap semiconductors, zinc compounds, zinc-oxide, single-crystals
URN: urn:nbn:se:kth:diva-19068DOI: 10.1063/1.3270107ISI: 000272954900033ScopusID: 2-s2.0-77956142471OAI: diva2:337115
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2011-02-02Bibliographically approved

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Hallén, Anders
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Microelectronics and Applied Physics, MAP
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