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Synthèse et caractérisation de nouveaux polythiophènes porteurs de groupes C60 pour une application solaire photovoltaïque organique

Abstract : Efficiency of organic photovoltaic solar cells is influenced by the active layer's morphology. The aim of this thesis was to elaborate a compatibilising agent which could stabilise the morphology of the P3HT:PCBM blend. We chose to synthesize alternating copolymers based on fullerene and polythiophene blocks to improve compatibility between P3HT and PCBM. The synthesis of copolymers has been achieved by polycondensation of a fullerene derivative with several regioregular oligothiophenes for which difunctionality was well controlled. Particular care has been given to the optimisation of polycondensation conditions in order to favour high polymerisation degrees. Structural, optical and electrochemical characterisations have been realized. The compatibilising effect of our copolymers on the active layer morphology has been investigated on the basis of photovoltaic measurements, atomic force microscopy observations and surface energy calculations.
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Submitted on : Wednesday, February 1, 2012 - 1:06:13 AM
Last modification on : Friday, March 25, 2022 - 9:44:16 AM
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Mathilde Legros. Synthèse et caractérisation de nouveaux polythiophènes porteurs de groupes C60 pour une application solaire photovoltaïque organique. Autre. Université de Grenoble, 2011. Français. ⟨NNT : 2011GRENI023⟩. ⟨tel-00664997⟩

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