Novel homologous series of liquid crystal-based phenyl anthracene with different alkoxy chains for optoelectronic device applications
Résumé
This study focuses on the development of new multifunctional mesogenic semi-conducting (LC-SC) small molecule materials based on 2-amino anthracene and para-hydroxybenzaldehyde1 (n-OPIA with n= 8, 10, 12 and 16) and a new semiconducting polymer based on anthracene to use in flexible organic electronic devices which was obtained by in situ-photo-thermal polymerization process from a firstly synthesized epoxy functional monomer. These materials are based on the concept of liquid crystal (LC) materials featuring facile processability, highly ordered alignment and effective charge transport. Their thermal behaviors are performed by means of differential scanning calorimetry and polarized optical microscopy, and showed differences on mesomorphic behaviors. Their frontier molecular energy levels were studied by optical spectroscopy and cyclic voltammetry and compared to values obtained via ab initio DFT calculations. The LC Field-Effect Transistors (LC-FETs) developed using solvent vapour enhanced drop casting based n-OPIA material demonstrated efficient electrical properties and interesting photoconductive performance, suggesting possible applications in multifunctional integrated devices.