Article ID Journal Published Year Pages File Type
1788303 Current Applied Physics 2011 4 Pages PDF
Abstract

We investigate the role of the O-vacancy in ZnO. The vacancy is well-known to be rich in ZnO and the origin of the natural n-type conductivity. The electronic structure of the O-vacancy examined by the accurate GW calculations indicates that it is a deep donor. By considering the interactions between the O-vacancy and the other native point defects in O-deficient ZnO through density-functional theory calculations, the presence of O-vacancy induces the formation of Zn-interstitial which is a shallow donor. A quantum mechanical attractive interaction between the deep O-vacancy donor and the shallow Zn-interstitial donor, which comes from the electronic orbital hybridization, is discussed.

Related Topics
Physical Sciences and Engineering Physics and Astronomy Condensed Matter Physics
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