Structure, interface, and luminescence of (01 1 ¯ 1) ZnO nanofilms

• Published in: Thin solid films 2010-10, Vol.519 (1), p.549-555
• Main Authors: Shen, Jung-Hsiung, Yeh, Sung-Wei, Huang, Hsing-Lu, Gan, Dershin
• Format: Article
• Language: English
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Emission; Exact sciences and technology; Interfaces; Ion and electron beam-assisted deposition; ion plating; Ion beam sputtering; Luminescence; Materials science; Methods of deposition of films and coatings; film growth and epitaxy; Nanocomposites; Nanomaterials; Nanostructure; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of specific thin films; Orientation relationships; Other luminescence and radiative recombination; Physics; Structure and morphology; thickness; Surface layer; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Texture; Thin film structure and morphology; Transmission electron microscopy (TEM); Zinc oxide
• ISSN: 0040-6090; 1879-2731
• DOI: 10.1016/j.tsf.2010.08.098

ZnO nanofilms of (01 1 ¯ 1) texture have been prepared by ion beam sputtering on the (001) surface of single-crystal NaCl. The orientation relationship between them is determined by transmission electron microscopy. Analyses of electron diffraction patterns and interface confirm that the ZnO (01 1 ¯ 1) plane is the interface with the NaCl (001) surface. The photoluminescence spectrum from the ZnO (01 1 ¯ 1) surface shows a near-band-edge UV emission and a broad green emission. The result indicates that the inherent high surface defects of oxygen vacancies on the (01 1 ¯ 1) surface are the probable origin of the green emission.