Abstract
In this subchapter is discussed some characteristics and properties of AlOxNy thin films produced by reactive DC magnetron sputtering. The films were deposited using Ar as working gas and a reactive gas mixture of N2+O2 (17:3). The reactive gas flow was varied in order to produce a wide range of chemical compositions. Sub-stoichiometric AlOxNy films, with CO+N/CAl atomic ratios up to 0.85 were produced, with Al-type crystalline structure. Transmission electron microscopy (TEM) analysis and X-ray photoelectron spectroscopy (XPS) spectra suggests that the films are a percolating network, composed by aluminium nanocrystals with different shapes and sizes embedded in an oxide/nitride matrix. The particular composition, structure and morphology of the films results in very different electrical properties, which can be explained using a tunnel barrier conduction mechanism for the electric charge transport, as well as distinct optical responses, such as an unusual large broadband absorption for some films.
Keywords: Reactive DC magnetron sputtering, thin films, AlOxNy, target potential, deposition rate, composition, structure, grain size, morphology, percolating network, XPS, TEM, electrical and optical properties, reflectance, refractive index, extinction coefficient, electrical resistivity, temperature coefficient of resistance (TCR), broadband absorption.
Related Books
Advanced Materials and Nano Systems: Theory and Experiment - Part 2
Advanced Materials and Nano Systems: Theory and Experiment (Part-1)
The Art of Nanomaterials
Nano Materials Induced Removal of Textile Dyes from Waste Water
Nanobiotechnology: Principles and Applications
Bio-Inspired Nanotechnology
Synthesis of Nanomaterials
Materials Science: A Field of Diverse Industrial Applications
Synthesis and Applications of Semiconductor Nanostructures
Industrial Applications of Polymer Composites