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. 2015 Jul 16;10:4521–4533. doi: 10.2147/IJN.S83356

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© 2015 Mehmood et al. This work is published by Dove Medical Press Limited, and licensed under Creative Commons Attribution – Non Commercial (unported, v3.0) License

The full terms of the License are available at http://creativecommons.org/licenses/by-nc/3.0/. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed.

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Schematic diagram showing the possible radiative transitions in ZnO due to various defects, such as Zn and O interstitials, and vacancies.

Notes: The diagram was used to identify the origin of various bands and peaks in the PL spectra from the postprocessed ZnO nanostructures shown in Figure 7. Data from Faber et al.²⁴

Abbreviations: E_C, conduction band edge; E_g, band gap energy; E_V, valence band edge; I_O, oxygen interstitials; I_Zn, Zn interstitials; PL, photoluminescence; V_O, oxygen vacancies; V_Zn, zinc vacancies.