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Charge transfer and transport properties in PCDTBT/p-nitrobenzylinemalononitrile composite for photovoltaic application

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Abstract

In this study, we investigated the impact of incorporating small organic molecules p-nitrobenzylinemalononitrile (NO2BMN) into a poly[N-9′-heptadecanyl-2,7-carbazole-alt-5,5-(4,7-di-2-thienyl-2′,1′,3′-benzothiadiazole] (PCDTBT) matrix on the optical and electrical proprieties. The absorption and photoluminescence spectra were used to confirm the improvement of the optical characteristics. An optimal weight ratio of (1:1) of PCDTBT:NO2BMN composite is found to achieve the best efficiency of charge transfer that occurs between both compounds. For the same composition, the device based on ITO/PCDTBT:NO2BMN/Al structure shows an improvement in current density and reduction in threshold voltage. Additionally, we have estimated the conduction mechanisms by the analyses of J (V) characteristics in a double logarithmic scale under dark conditions. The obtained results indicated that the addition of NO2BMN enhances the electrical properties of the composite.

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Authors and Affiliations

  1. Laboratory of Condensed Matter and Nanosciences, Group of Organic Electronic and Molecular Photovoltaics Devices, Faculty of Sciences of Monastir, University of Monastir, 5019, Monastir, Tunisia

    Souhir Azzaz, Walid Aloui & Abdelaziz Bouazizi

  2. Laboratory of Energies and Materials, Higher Institute of Computer Science and Communication Technologies of Hammam Sousse, University of Sousse, 4011, Hammam Sousse, Tunisia

    Riadh Hannachi

Authors
  1. Souhir Azzaz
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  2. Walid Aloui
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  3. Riadh Hannachi
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  4. Abdelaziz Bouazizi
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Correspondence to Souhir Azzaz.

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Azzaz, S., Aloui, W., Hannachi, R. et al. Charge transfer and transport properties in PCDTBT/p-nitrobenzylinemalononitrile composite for photovoltaic application. Bull Mater Sci 47, 13 (2024). https://doi.org/10.1007/s12034-023-03086-z

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