dc.date.accessioned | 2016-08-09T14:05:48Z | |
dc.date.available | 2016-08-09T14:05:48Z | |
dc.date.issued | 2011 | |
dc.identifier.uri | http://hdl.handle.net/10852/51171 | |
dc.description.abstract | Monocrystalline n-type zinc oxide (ZnO) samples prepared by different techniques and containing various amounts of lithium (Li) have been studied by positron annihilation spectroscopy (PAS) and secondary ion mass spectrometry. A distinct PAS signature of negatively charged Li atoms occupying a Zn-site (Li−Zn), socalled substitutional Li, is identified and thus enables a quantitative determination of the content of LiZn. In hydrothermally grown samples with a total Li concentration of ∼2 × 1017 cm−3, LiZn is found to prevail strongly, with only minor influence, by other possible configurations of Li. Also in melt grown samples doped with Li to a total concentration as high as 1.5 × 1019 cm−3, a considerable fraction of the Li atoms (at least 20%) is shown to reside on the Zn-site, but despite the corresponding absolute acceptor concentration of (2–3) × 1018 cm−3, the samples did not exhibit any detectable p-type conductivity. The presence of LiZn is demonstrated to account for the systematic difference in positron lifetime of 10–15 ps between Li-rich and Li-lean ZnO materials as found in the literature, but further work is needed to fully elucidate the role of residual hydrogen impurities and intrinsic open volume defects.
© 2011 American Physical Society | en_US |
dc.language.iso | en | en_US |
dc.relation.ispartof | Neuvonen, Pekka T. (2012) Nano engineering of ZnO; intrinsic defects and group-I impurities. Doctoral thesis. http://urn.nb.no/URN:NBN:no-54645 | |
dc.relation.uri | http://urn.nb.no/URN:NBN:no-54645 | |
dc.title | Identification of substitutional Li in n-type ZnO and its role as an acceptor | en_US |
dc.type | Journal article | en_US |
dc.creator.author | Johansen, K. M. | |
dc.creator.author | Zubiaga, A. | |
dc.creator.author | Makkonen, I. | |
dc.creator.author | Tuomisto, F. | |
dc.creator.author | Neuvonen, P. T. | |
dc.creator.author | Knutsen, K. E. | |
dc.creator.author | Monakhov, E. V. | |
dc.creator.author | Kuznetsov, A. Yu. | |
dc.creator.author | Svensson, B. G. | |
dc.identifier.jtitle | Physical Review B | |
dc.identifier.volume | 83 | |
dc.identifier.issue | 24 | |
dc.identifier.doi | http://dx.doi.org/10.1103/PhysRevB.83.245208 | |
dc.identifier.urn | URN:NBN:no-54556 | |
dc.type.document | Tidsskriftartikkel | en_US |
dc.type.peerreviewed | Peer reviewed | |
dc.identifier.fulltext | Fulltext https://www.duo.uio.no/bitstream/handle/10852/51171/1/Neuvonen_I_PhysRevB.83.245208.pdf | |
dc.type.version | PublishedVersion | |
cristin.articleid | 245208 | |