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Cellules solaires organiques à hétérojonction en volume procédées de solution sur la base de dérivés de triazatruxene

Abstract : The prospective conception of electron-donor/electron-acceptor (D/A) bulk heterojunction solar cells was first reported in 1990s, which blended the semiconducting polymer with fullerene derivatives, enhancing the power conversion efficiency. Since then, interests on this domain has been increasing continuously, and the efficiencies of BHJ solar cells have been increased dramatically. In this context, this thesis focuses on the study of a series of dumbbell-shaped small molecule donors, based on a highly planar unit called triazatruxene. The only difference between those molecules is the side-chains attached to central units and TAT units. As a consequence, the relationship between side chains nature and optoelectronic and structural properties of our TAT-based dumbbell-shaped molecular architecture will be investigated in detail. The impact of the alkyl chains on the molecular and thin film properties was also studied, with a particular emphasis put on microstructure and charge transport aspects. In-plane and out-of-plane charge carrier transport, with pure molecules and blend with fullerene, are measured in different systems. BHJ solar cells in blend with fullerene derivatives were also realized.
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Tianyan Han. Cellules solaires organiques à hétérojonction en volume procédées de solution sur la base de dérivés de triazatruxene. Electronics. Université de Strasbourg, 2017. English. ⟨NNT : 2017STRAD036⟩. ⟨tel-02003494⟩

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