Effect of thermal annealing on the electrical properties of P3HT:PC70BM nanocomposites |
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| Affiliation: | 1. Laboratory of Condensed Matter and Nanosciences, Faculty of Sciences of Monastir, Avenue of the Environment, 5019 Monastir, Tunisia;2. Department of Chemistry, Queen׳s University, Kingston, Canada ON K7L 3N6;3. Department of Physics, Engineering Physics and Astronomy, Queen׳s University, Kingston, Canada ON K7L 3N6;4. Laboratory of Physics of Materials and Nanomaterials applied to the Environment, Faculty of Sciences of Gabes, Erriadh City, 6072 Gabes, Tunisia;1. Lesya Ukrainka Eastern European National University, 43025 Lutsk, Ukraine;2. Semiconductor Physics Department and Institute of Applied Research, Vilnius University, Saulėtekio al. 9, bldg.3, LT-10222 Vilnius, Lithuania;1. Basic Science Department, High Institute of Engineering and Technology, El-Arish, North Sinai, Egypt;2. Department of Physics, Faculty of Science at New Damietta, Damietta University, 34517 New Damietta, Egypt;3. Solid State Electronics Laboratory, Solid State Physics Department, Physics Division, National Research Centre, 33 El-Bohouth St., Dokki, Giza 12622, Egypt;1. Equipe Dispositifs Electroniques Organiques, Laboratoire de la Matière Condensée et des Nanosciences, Faculté des Sciences de Monastir, Boulevard de l’Environnement, 5019 Monastir, Tunisia;2. Ingénierie des Matériaux Polymères, 15 boulevard Latarget, Université Claude Bernard Lyon 1, 69 622 Villeurbanne Cedex, France |
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| Abstract: | We studied the electrical properties of organic photovoltaic (OPV) devices based on poly (3-hexylthiophene) and fullerene derivative 6, 6]-Phenyl-C70-butyric acid methyl ester nanocomposite (P3HT:PC70BM) as a function of the annealing temperature. Thermal annealing enables crystallization of the polymer and diffusion of the PC70BM molecules. Diode parameters, such as the barrier height ϕb and the ideality factor n were calculated. They were found to be depend strongly on the annealing temperature. This dependence is attributed to surface states, inhomogeneity in the material and series resistance. Best OPV devices had a short circuit current density of 3.35 mA/cm2, an open circuit voltage of 0.68 V, a fill factor of 0.45, and a power conversion efficiency of 2.2%, by applying a thermal annealing temperature of 150 °C for 10 min. |
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| Keywords: | Nanocomposite Electrical properties Thermal annealing Cheung׳s functions |
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