Optical and electrical properties of poly ( N -vinylcarbazole)/graphene oxide nanocomposites for organic semiconductor d
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Optical and electrical properties of poly (N‑vinylcarbazole)/graphene oxide nanocomposites for organic semiconductor devices Meryem Goumri1,2 · Rhizlane Hatel1 · Bernard Ratier2 · Mimouna Baitoul1 Received: 5 May 2020 / Accepted: 15 July 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract In this work, organic semiconductor devices (OSD) incorporating both poly(N-vinylcarbazole) (PVK) and graphene oxide (GO) were fabricated. The stable solutions of PVK/GO were prepared in chloroform by a simple sonication method, which enabled the successful dispersion of GO with the polymer matrix. These nanomaterials have been used in the fabrication of OSD with configuration ITO/PVK:GO/Ag. The electrical and optical properties were investigated using several techniques. The electrical measurements show that the electrical behavior of PVK polymer enhanced with increasing GO nanofillers concentration. The observed electrical improvement in the nanocomposites can be attributed to the charge transfer interaction between carbazole electron donor and the functional groups onto the surface of GO. UV–Vis absorption and photoluminescence studies elucidated the energy transfer and the interaction between polymer chains and the graphene nanosheets which exhibit a strong blue-green luminescence. Keywords Poly (N-vinylcarbazole) · Graphene oxide · Semiconducting polymer · Charge transport · Photoluminescence
1 Introduction Organic semiconductor devices are gaining much interest and have emerged as excellent candidates for potential applications in numerous areas, with significant advantages over inorganic materials, due to their notable attractive features such flexibility, easy tuning of functional properties and low cost large-area solution-procession [1]. The materials used in this type of device are mainly polymer or carbon nanoparticles, and each of them has its own innate strengths and disadvantages [2]. For example, graphene a thin layer of sp2-hybridized carbon atoms in a honeycomb crystal lattice exhibits remarkable electronic and optical properties that qualify it as the best active material in organic optoelectronic devices [3]. Despite these advanced outcomes, researchers still face many challenges due to the problems associated * Meryem Goumri [email protected] 1
Group of Polymers and Nanomaterials, Laboratory of Solid State Physics, Faculty of Sciences Dhar El Mahraz, University Sidi Mohammed Ben Abdellah, PO Box 1796, Atlas Fez, Fez 30000, Morocco
XLIM UMR 7252, University of Limoges/CNRS, 123 Avenue Albert Thomas, 87060 Limoges Cedex, France
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with the manufacture of this material in terms of low solubility, high cost and reproducibility in large quantities. Therefore, graphene oxide (GO), the oxidized form of graphene, is attracting increasing interest in the scientific community due to its use as a starting material for the preparation of graphene based materials via wet chemical approaches. The oxygenated functional groups negatively charged on its surface give it abundant, adju
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