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Bicouches orientées de cristaux liquides colonnaires pour applications photovoltaïques

Abstract : Columnar liquid crystals made of discotic molecules derived from aromatic dyes are promising materials for the realization of photovoltaic devices thanks to their high charge mobility and their capacity to self-organize. In order to benefit from their anisotropic properties, it is necessary to control their organization in thin films. For example, a homeotropic anchoring where the columns are perpendicular to the substrate is required to carry the charges efficiently to the electrodes. Homogeneous homeotropically oriented ultrathin films (approximately 25 nm) have been obtained by an anchoring transition between a solid substrate and a silver cathode. Moreover, a homeotropically oriented bilayer formed by discotic compounds has been achieved. This represents the first proof of principle of an organic heterojunction based on two oriented columnar liquid crystal layers.
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Contributor : Nadine Laffargue <>
Submitted on : Tuesday, May 10, 2011 - 4:05:28 PM
Last modification on : Thursday, January 11, 2018 - 6:15:00 AM
Long-term archiving on: : Thursday, August 11, 2011 - 3:00:13 AM


  • HAL Id : tel-00591978, version 1



Olivier Thiebaut. Bicouches orientées de cristaux liquides colonnaires pour applications photovoltaïques. Analyse de données, Statistiques et Probabilités []. Université Sciences et Technologies - Bordeaux I, 2011. Français. ⟨tel-00591978⟩



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