Effects of Annealing Treatment on Photoluminescence and Structural Properties of ZnO Nanostructures

Chuo Ann Ling; Shahrom Mahmud; Siti Khadijah Mohd Bakhori

doi:10.4028/www.scientific.net/AMR.501.184

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 501Effects of Annealing Treatment on...

Effects of Annealing Treatment on Photoluminescence and Structural Properties of ZnO Nanostructures

Abstract:

Zinc oxide (ZnO) pellets were prepared by agglomeration of ZnO nanopowder with distilled water in this study. Annealing at 800oC in different ambient was done on the surface of the pellets in order to change the photoluminescence and structural properties of the sample. The ZnO pellets that were annealed in air, oxygen and nitrogen ambient reduce the intensity of near-band-edge emission in photoluminescence spectra. The observed change in green luminescence after the annealing process suggests that the oxygen vacancies are the recombination centers for green luminescence in the samples. Red luminescence was also observed and it is attributed to oxygen vacancies in different energy level. Different annealing ambient had significantly modified the green and red luminescence. Structural investigation carried out by X-ray diffraction (XRD) revealed the polycrystalline nature for ZnO pellets with hexagonal phase and annealing process increased the cystallinity of the ZnO pellets.

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Advanced Materials Research (Volume 501)

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184-188

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https://doi.org/10.4028/www.scientific.net/AMR.501.184

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April 2012

Authors:

Chuo Ann Ling, Shahrom Mahmud, Siti Khadijah Mohd Bakhori

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Ambient, Annealing, Photoluminescence (PL), Zinc Oxide (ZnO)

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