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Influence of solvents on the electrical parameters of poly(2,5-bis(3-alkylthiophen-2-yl)thieno[3,2-b]thiophene) (PBTTT) field effect transistor

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Abstract

In this study, we investigate the influence of solvents with different boiling points on the electrical performances of poly(2,5-bis(3-alkylthiophen-2-yl)thieno[3,2-b]thiophene) (PBTTT) transistors. To dissolve PBTTT for thin-film processing, we used toluene, chlorobenzene (CB), and tetrahydrofuran (THF). The highest obtained field effect mobilities were about 3.42 × 10−2 cm2 V−1 s−1, 1.62 × 10–3 cm2 V−1 s−1, and 1.78 × 10–2 cm2 V−1 s−1, respectively, for PBTTT devices using chlorobenzene, toluene, and tetrahydrofuran and heated respectively at 120 °C, 150 °C, and 120 °C. In order to point out the role of morphological properties, AFM images were performed. We observed liquid crystalline state formation in PBTTT film from THF and toluene which drive the electrical parameters over grain size.

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Acknowledgments

Part of this research was carried out at the ICube laboratory of Strasbourg and IM2NP of Marseille. So, the authors thank ICube laboratory members and members from OPTO-PV group of IM2NP. Authors also acknowledge the FIRST (Fonds d’Impulsion pour la Recherche Scientifique et Technique) program for financial support.

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Authors and Affiliations

  1. Laboratoire de Chimie et de Physique des Matériaux (LCPM), Département de Physique, Université Assane Seck, Ziguinchor, Senegal

    Abdoul Kadri Diallo, Rémi Ndioukane, Ndeye Coumba Yandé Fall & Diouma Kobor

  2. Département de Physique Appliquée, Université Gaston Berger, Saint-Louis, Senegal

    Abdou Karim Diallo & Abdoulaye Tall

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  1. Abdoul Kadri Diallo
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Diallo, A.K., Diallo, A.K., Ndioukane, R. et al. Influence of solvents on the electrical parameters of poly(2,5-bis(3-alkylthiophen-2-yl)thieno[3,2-b]thiophene) (PBTTT) field effect transistor. MRS Advances 8, 723–728 (2023). https://doi.org/10.1557/s43580-023-00577-3

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