Structural, Morphological, and Optical Properties of Cobalt Oxide Thin Films

Cobalt oxide thin films are successfully synthesized by sol‐gel spin coating method. The XRD study shows that the cobalt oxide thin films annealed at 400°C exhibit cubic polycrystalline structure. SEM images show a well adherent and uniform formation of cobalt oxide thin films with nanosized grains‐...

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Bibliographic Details
Published in:Macromolecular symposia. 2021-12, Vol.400 (1), p.n/a
Main Authors: Pawar, Charudatta S., Yadav, A. T., Salunkhe, S. P.
Format: Article
Language:English
Subjects:
Absorptivity
Annealing
Antireflection coatings
Cobalt
cobalt oxide
Cobalt oxides
Electrons
Morphology
Multilayers
Optical properties
Oxide coatings
Refractivity
SEM
Sol-gel processes
sol‐gel spin coating
Spin coating
Thin films
XRD
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Summary:Cobalt oxide thin films are successfully synthesized by sol‐gel spin coating method. The XRD study shows that the cobalt oxide thin films annealed at 400°C exhibit cubic polycrystalline structure. SEM images show a well adherent and uniform formation of cobalt oxide thin films with nanosized grains‐like morphology. From the optical study, the direct optical band gap values of as‐deposited and annealed cobalt oxide films are found to lie between 1.42–2.05  and 1.36–1.94 eV. The absorption coefficient of the cobalt oxide is found to be in the order of 104 cm−1. High refractive index of cobalt oxide indicates that it can be used as one of the layers in multilayer antireflection coatings.
ISSN:1022-1360
1521-3900
DOI:10.1002/masy.202100125