Photoluminescence properties of un-doped and Mn-doped ZnO nanostructures
We presented combinations of vapor phase transport (VPT) of mixture of methanol and acetone and thermal evaporation of brass (CuZn) which contain in-situ three stages in obtaining un-doped and Mn-doped zinc oxide (ZnO) nanostructures (NSs). The structure and morphology were characterized by energy dispersive X-ray analysis (EDAX), field emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD). The role of Ar as feed gas and interaction between methanol and brass have been predicted based on work reported elsewhere. Photoluminescence (PL) properties of un-doped and Mn-doped ZnO showed significant changes in the optical properties providing evidence for several types of defects such as zinc interstitials (Zn i ), oxygen interstitials (O i ), zinc vacancy (V Zn ), singly charged zinc vacancy (V– Zn ), oxygen vacancy (V o ), singly charged oxygen vacancy (V+ o ) and oxygen antisite defects (O Zn ) in the grown NS. The Mn-doped ZnO NSs have exhibited shifted PL peaks compared to the un-doped ZnO.
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Document Type: Research Article
Publication date: December 1, 2014
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