Optical and structural properties of NiMgO thin films formed by sol-gel spin coating

    Authors

    R. C. Boutwell; M. Wei; A. Scheurer; J. W. Mares;W. V. Schoenfeld

    Comments

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    Abbreviated Journal Title

    Thin Solid Films

    Keywords

    NiMgO; Sol-gel; Thin films; Spin coating; Ultraviolet solar blind; X-ray; diffraction; Optical properties; MAGNESIUM-OXIDE; NICKEL-OXIDE; MGO; LUMINESCENCE; Materials Science, Multidisciplinary; Materials Science, Coatings &; Films; Physics, Applied; Physics, Condensed Matter

    Abstract

    Ni1-xMgxO thin films across the full compositional range were formed by a low-cost sol-gel spin coating method. Optical transmission of the resultant films in the ultraviolet-visible spectral region increased to as high as 90% upon sintering, and X-ray diffraction verified an increase in crystallinity for sintering temperatures up to 1000 degrees C, with root mean square roughness below 1 nm when sintered between 600 and 800 degrees C. The lattice parameter of the rock salt Ni1-xMgxO films showed a linear shift with increased magnesium concentration, consistent with a Vegard's Law relationship between the two binaries. Optical energy gaps from 3.6 to > 6.5 eV were realized by adjusting the composition of the Ni1-xMgxO films, demonstrating the suitability of the ternary for optical devices in the UV-C spectral region. (C) 2012 Elsevier B.V. All rights reserved.

    Journal Title

    Thin Solid Films

    Volume

    520

    Issue/Number

    13

    Publication Date

    1-1-2012

    Document Type

    Article

    Language

    English

    First Page

    4302

    Last Page

    4304

    WOS Identifier

    WOS:000303084200013

    ISSN

    0040-6090

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