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Defect evolution and impurity migration in Na-implanted ZnO

Neuvonen, Pekka T.; Vines, Lasse; Venkatachalapathy, Vishnukanthan; Zubiaga, Asier; Tuomisto, Filip; Hallén, Anders; Svensson, Bengt G.; Kuznetsov, Andrej Yu.
Journal article; PublishedVersion; Peer reviewed
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Neuvonen_IV_PhysRevB.84.205202.pdf (370.9Kb)
Year
2011
Permanent link
http://urn.nb.no/URN:NBN:no-54644

Is part of
Neuvonen, Pekka T. (2012) Nano engineering of ZnO; intrinsic defects and group-I impurities. Doctoral thesis.
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  • Fysisk institutt [2260]
Original version
Physical Review B. 2011, 84 (20):205202, DOI: http://dx.doi.org/10.1103/PhysRevB.84.205202
Abstract
Secondary ion mass spectrometry (SIMS) and positron annihilation spectroscopy (PAS) have been applied to study impurity migration and open volume defect evolution in Na+ implanted hydrothermally grown ZnO samples. In contrast to most other elements, the presence of Na tends to decrease the concentration of open volume defects upon annealing and for temperatures above 600 ◦C, Na exhibits trap-limited diffusion correlating with the concentration of Li. A dominating trap for the migrating Na atoms is most likely Li residing on Zn site, but a systematic analysis of the data suggests that zinc vacancies also play an important role in the trapping process.
 
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