title: Face-on oriented bilayer of two discotic columnar liquid crystals for organic donor-acceptor heterojunction.
abstract: In this work, we report the achievement of a homeotropically (or face-on) oriented bilayer formed by a pair of discotic materials designed with specific properties: selective solubility, adjusted transition temperatures, and room temperature hexagonal columnar liquid-crystalline phase. The homeotropic orientation of the bilayer which is only a few hundred nanometers thick is performed by solution-processed deposition followed by thermal annealing in the geometry of open supported films and is evidenced by X-ray scattering. This represents the first proof of principle of an organic heterojunction based on two oriented columnar liquid crystal layers.
authors.affiliation: Centre de Recherche Paul-Pascal, CNRS-Université de Bordeaux, 115 Avenue Schweitzer, 33600 Pessac, France.
authors.forename: Olivier
authors.initials: O
authors.lastname: Thiebaut
authors.forename: Harald
authors.initials: H
authors.lastname: Bock
authors.forename: Eric
authors.initials: E
authors.lastname: Grelet