Photoluminescence of Zinc Oxide Nanowires: The Effect of Surface Band Bending | Zendy

Dake Wang | Zendy; Nicholas Reynolds | Zendy

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Photoluminescence of Zinc Oxide Nanowires: The Effect of Surface Band Bending

Author(s) -

Dake Wang,

Nicholas Reynolds

Publication year - 2012

Publication title -

isrn condensed matter physics

Language(s) - English

Resource type - Journals

eISSN - 2090-7400

pISSN - 2090-7397

DOI - 10.5402/2012/950354

Subject(s) - photoluminescence , zinc , chemisorption , materials science , annealing (glass) , oxygen , luminescence , raman spectroscopy , ultraviolet , raman scattering , nanowire , band bending , analytical chemistry (journal) , photochemistry , optoelectronics , chemistry , optics , metallurgy , adsorption , environmental chemistry , physics , organic chemistry

The photoluminescence of zinc oxide nanowires was investigated via the thermal annealing treatment in oxygen-rich and oxygen-poor conditions. Dramatic changes in the relative intensity of the ultraviolet and the green visible luminescence were observed following different annealing treatments. The changes in photoluminescence bear little correlation to the changes in the oxygen-to-zinc ratios that were revealed using Raman scattering and other characterization techniques. The chemisorption of oxygen and the subsequent surface band bending, instead of the oxygen vacancy concentration, are shown to be the mechanism that determines the observed changes in photoluminescence.

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