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Star-shaped conjugated systems derived from dithiafulvenyl-derivatized triphenylamines as active materials for organic solar cells

Abstract :

Hybrid conjugated systems consisting of a triphenylamine core substituted by three dithiafulvenyl moieties have been synthesized and tested as active materials in organic field-effect transistors and photovoltaic devices. UV–vis. spectroscopy studies demonstrate that, despite their amorphous character shown by X-ray diffraction and differential scanning calorimetry, strong interactions exist in these materials as an aggregative band is observed at low energies. A first evaluation of their potentialities as p semiconductor in organic field-effect transistors shows significant hole mobilities. For bilayer photovoltaic devices, a power conversion efficiency of 0.11% is observed and the external quantum efficiency of the cell under monochromatic irradiation shows a non-negligible contribution of the aggregative band.

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https://hal.univ-angers.fr/hal-03027832
Contributeur : Okina Université d'Angers <>
Soumis le : vendredi 27 novembre 2020 - 12:28:46
Dernière modification le : jeudi 3 décembre 2020 - 03:28:54
Archivage à long terme le : : dimanche 28 février 2021 - 19:19:52

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Olivier Alévêque, Philippe Leriche, Nicolas Cocherel, Pierre Frère, Antonio Cravino, et al.. Star-shaped conjugated systems derived from dithiafulvenyl-derivatized triphenylamines as active materials for organic solar cells. Solar Energy Materials and Solar Cells, Elsevier, 2008, 92 (9), pp.1170 - 1174. ⟨10.1016/j.solmat.2008.04.006⟩. ⟨hal-03027832⟩

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