Photoluminescence of Zinc Oxide Nanowires: The Effect of Surface Band Bending. (8th April 2012)

• Record Type: Journal Article
• Authors: Wang, Dake; Reynolds, Nicholas
• Other Names: Brault J. Academic Editor.; Hibino H. Academic Editor.; Kochereshko V. Academic Editor.
• Is Part Of: ISRN condensed matter physics. Volume 2012(2012)
• Publication Date: 2012-04-08
• Subjects: Condensed matter -- Periodicals; Condensed matter; Periodicals; Electronic journals; 530.41
• DOI: 10.5402/2012/950354
• Languages: English
• ISSNs: 2090-7397

Abstract

Abstract : 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.