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Theses

Etudes de cristaux liquides colonnaires en solution organique et en film mince ouvert

Abstract : The studies undertaken in this thesis are of relevance for solar cells made from discotic organic materials. These cells offer good charge and exciton transport properties if the materials used are structured in columns. An approach is proposed and studied which aims to optimise the parameters of these organic devices. In particular, the self-assembly of the materials has been studied in solution and in thin films. In various organic solvents, the aggregation of the discotic molecules into columns of a few nanometres in size has been observed, with dense stacking of the discs within the columns and without intercolumnar order beyond next neighbours. By grazing incidence X-ray diffraction, the structure of thin films has been elucidated. The results underline the unavoidable necessity to orientate the columnar liquid crystalline films.
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Sébastien Dardel. Etudes de cristaux liquides colonnaires en solution organique et en film mince ouvert. Chimie théorique et/ou physique. Université Sciences et Technologies - Bordeaux I, 2006. Français. ⟨tel-00808262⟩

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