TITLE

Why nitrogen cannot lead to p-type conductivity in ZnO

AUTHOR(S)
Lyons, J. L.; Janotti, A.; Van de Walle, C. G.
PUB. DATE
December 2009
SOURCE
Applied Physics Letters;12/21/2009, Vol. 95 Issue 25, p252105
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Based on electronic structure and atomic size considerations, nitrogen has been regarded as the most suitable impurity for p-type doping in ZnO. However, numerous experimental efforts by many different groups have not resulted in stable and reproducible p-type material, casting doubt on the efficacy of nitrogen as a shallow acceptor. Based on advanced first-principles calculations we find that nitrogen is actually a deep acceptor, with an exceedingly high ionization energy of 1.3 eV, and hence cannot lead to hole conductivity in ZnO. In light of this result, we reexamine prior experiments on nitrogen doping of ZnO.
ACCESSION #
47132858

 

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