Stability of electroluminescent conjugated with fluoro groups in vinylene units

New fluorin-containing electroluminescent polymers in vinylene units, poly(2-dimethyldodecylsilyl-p-phenylene-difluorovinylene) (DMDS-PPDFV), have been synthesized by GILCH polymerization. This polymer has been used as the electroluminescent layers in light-emitting diodes (LEDs) (ITO/PEDOT/polymer/Al). DMDS-PPDFV shows PL around lambda(max) = 455 nm (exciting wavelength, 365 nm) and green EL around lambda(max) = 489 nm. Attachment of two the fluoro groups were introduced to poly(2-dimethydodecylsilyl-1,4-phenylenevinylene) (DMDS-PPV) to give DMDS-PPDFV in an attempt to increase the electron affinity of the parent polymer.