Defect properties of ZnO nanowires

J. E. Stehr, M. Devika, N. Koteeswara Reddy, C. W. Tu, W. M. Chen, I. A. Buyanova
In this work we examined optical and defect properties of as-grown and Ni-coated ZnO nanowires (NWs) grown by rapid thermal chemical vapor deposition by means of optically detected magnetic resonance (ODMR). Several grown-in defects are revealed by monitoring visible photoluminescence (PL) emissions and are attributed to Zn vacancies, O vacancies, a shallow (but not effective mass) donor and exchange-coupled pairs of a Zn vacancy and a Zn interstitial. It is also found that the same ODMR
more » ... he same ODMR signals are detected in the as-grown and Ni-coated NWs, indicating that metal coatings does not significantly affect formation of the aforementioned defects and that the observed defects are located in the bulk of the NWs.
doi:10.1063/1.4865651 fatcat:4bo4daab3zhxdpw736um7dg7pa