Multi-Block Liquid Crystalline Organic Semi-Conductors for Organic (opto)electronic applications

Four Multi-Blocks Liquid Crystalline Organic SemiConductors (MBLCOSCs) were synthesized via a solvent-less one pot melt-condensation of 4,4'-(butane-1,4-diylbis(oxy))bis(butane-4,1-diyl) bis(4-aminobenzoate) with (tailored-made) π-conjugated building blocks bearing a terminal reactive aldehyde function. Their optoelectronic properties and thermotropic mesomorphic behavior were investigated by UV-Vis absorption and Photoluminescence (PL) spectroscopies, and by Differential Scanning Calorimetry (DSC) and Polarizing Optical Microscopy (POM), respectively. Finally, current-voltage (I-V) measurements were performed on Organic Light-Emitting Diodes (OLEDs) fabricated with a ITO/MBLCOSCs/Alq
₃
/Al multi-layered architecture.