PREPARATION AND CHARACTERIZATION OF POLY(P-PHENYLENE VINYLENE) LANGMUIR-BLODGETT-FILMS FORMED VIA PRECURSOR METHOD

Recent advances on K-conjugated conducting polymers for electrolumines cence(EL) have shown a strong possibility for various display applicat ions. In this paper, we will describe the preparation of ultra thin fi lms of oil-soluble poly(p-phenylene vinylene) (PPV) precursor polymer by the Langmuir-Blodgett technique and by conversion into PPV films vi a a thermal treatment. The characterization of these films was also ca rried out by FT-IR spectroscopy, W-VIS absorption spectroscopy, photol uminescence (PL), and Scanning Tunneling Microscopy (STM). FT-IR, and W-VIS results indicated that multilayer films of PPV precursor polymer were formed well and the elimination of methoxy group in PPV precurso r polymer was partially achieved by the thermal treatment. Red shift w as observed in PL analysis after thermal treatment. An STM image of a PPV monolayer on graphite showing the polymer chains was observed.