Efficient electroluminescence was revealed in single-layer light-emitting diodes based on electron-hole conducting polymers containing the nanocrystalline phase of cyanine dyes (J-aggregates). These species exhibit a very narrow emission band with a maximum in the red to infrared spectrum range. The J-aggregates play an active role in the charge carrier transport of the composites.

No abstract

No abstract

No abstract

Some multicomponent ferroelectric mixtures have been prepared and characterised. Novel non-chiral and chiral non-mesogenic fluorine containing ester derivatives were mixed with chiral compounds and binary mixtures exhibiting smectic C phase. The physical and electrooptical properties such as tilt angle and switching time were also measured.