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Electronics 2017, 6(4), 86; https://doi.org/10.3390/electronics6040086

The Electrical Properties of Plasma-Deposited Thin Films Derived from Pelargonium graveolens

1
Electronics Materials Lab, College of Science and Engineering, James Cook University, Townsville, QLD 4811, Australia
2
School of Chemistry, Physics, Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia
*
Author to whom correspondence should be addressed.
Received: 20 September 2017 / Revised: 13 October 2017 / Accepted: 16 October 2017 / Published: 18 October 2017
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Abstract

Inherently volatile at atmospheric pressure and room temperature, plant-derived precursors present an interesting human-health-friendly precursor for the chemical vapour deposition of thin films. The electrical properties of films derived from Pelargonium graveolens (geranium) were investigated in metal–insulator–metal (MIM) structures. Thin polymer-like films were deposited using plasma-enhanced synthesis under various plasma input power. The J–V characteristics of thus-fabricated MIM were then studied in order to determine the direct current (DC) conduction mechanism of the plasma polymer layers. It was found that the capacitance of the plasma-deposited films decreases at low frequencies (C ≈ 10−11) and remains at a relatively constant value (C ≈ 10−10) at high frequencies. These films also have a low dielectric constant across a wide range of frequencies that decreases as the input RF power increases. The conductivity was determined to be around 10−16–10−17 Ω−1 m−1, which is typical for insulating materials. The Richardson–Schottky mechanism might dominate charge transport in the higher field region for geranium thin films. View Full-Text
Keywords: electrical properties; plasma-deposited films; Pelargonium graveolens; geranium; metal–insulator–metal electrical properties; plasma-deposited films; Pelargonium graveolens; geranium; metal–insulator–metal
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Al-Jumaili, A.; Alancherry, S.; Bazaka, K.; Jacob, M.V. The Electrical Properties of Plasma-Deposited Thin Films Derived from Pelargonium graveolens. Electronics 2017, 6, 86.

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