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4H-pyranylidene-based small push-pull chromophores: Synthesis, structure, electronic properties and photovoltaic evaluation

Abstract : The synthesis and electrochemical and optical characterizations of four new 4H-pyranylidene-based push-pull molecules are reported herein as well as their evaluation as donor materials for organic photovoltaics. Studied systems exhibit good absorption properties and appropriate LUMO levels for a photoinduced electron transfer to C60. Bilayer organic solar cells fabricated from these new donors and C60 as acceptor gave photocurrent however with low power conversion efficiencies. As shown by X-ray diffraction and theoretical calculations, titled molecules present a twisted structure which may prevent the formation of suitable π-π contacts between adjacent molecules hence explaining their low photovoltaic performance. 2
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https://hal.archives-ouvertes.fr/hal-02888754
Contributeur : Clément Cabanetos <>
Soumis le : jeudi 19 novembre 2020 - 11:33:49
Dernière modification le : jeudi 19 novembre 2020 - 11:41:21

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Víctor Tejeda-Orusco, Martin Blais, Clément Cabanetos, Philippe Blanchard, Raquel Andreu, et al.. 4H-pyranylidene-based small push-pull chromophores: Synthesis, structure, electronic properties and photovoltaic evaluation. Dyes and Pigments, Elsevier, 2020, 178, pp.108357. ⟨10.1016/j.dyepig.2020.108357⟩. ⟨hal-02888754⟩

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