Synthesis and characterization of sulfur-containing PPV derivatives

New sulfur-containing poly(2-hexylthio-5-methoxy-1,4-phenylenevinylene) (PMHPV) and poly(2-hexylsulfinyl-5-methoxy-1,4-phenylenevinylene) (PMHOPV) were synthesized through water-soluble precursor route. These polymers were characterized using UV-visible, FT-IR and thermal analyses. The light emitting devices composed with ITO/polymer films/A1 were fabricated and luminescent properties were characterized. The PMHOPV that contains the electron-accepting hexylsulfinyl group showed lower electrical conductivity of 1.2 × 10−4 S/cm than that of PMHPV (9 × 10−2 S/cm) and maximum EL emission in the longer wavelength region.