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Erschienen in:
01.01.2024
The role of iron oxide on the electronic and electrical properties of nitrogenated reduced graphene oxide: experimental and density functional theory approach
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 2/2024
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Abstract
In this study, nitrogenated reduced graphene oxide (N-rGO) was synthesized and functionalized with iron III oxide (Fe2O3) nanoparticles via a two-step facile sol–gel method. The electrical properties of N-rGO functionalized Fe2O3 nanoparticles showed enhanced electrical conductivity for low Fe2O3 concentration. The I–V characteristics further showed the conversion of p-type to n-type semiconducting features. The enhanced electrical conductivity can be attributed to induced defects arising from the incorporation of Fe2O3 nanoparticles into the N-rGO matrix. Density functional theory calculations showed the formation of unoccupied states below the Fermi level, as well as charge transfer between C, N, Fe, and O atoms. The improved electrical conductivity and conversion of p- to n-type semi-conductivity can be attributed to the hybridization between the C 2p, O 2p, N 2p, and Fe 3d orbitals, and could lead to increased potential of rGO composite for electronic device applications.