SPECTROSCOPIC CHARACTERIZATION OF THE CONVERSION OF POLY(P-PHENYLENE-VINYLENE) PRECURSOR BY ION IRRADIATION

Different spectroscopic techniques show that poly(p-phenylene vinylene ) films can be derived from a sulphonium precursor by irradiation with ion beams at energies of the order of 100 keV. The comparison with th e pyrolysis conversion shows less chlorine and sulfur residues in the irradiated thickness, whereas some ketone structures are evidenced.?he formation of nanometric scale carbon clusters induced by the irradiat ion degradation of PPV is however indicated by UV spectrophotometry, l eading to bandgap narrowing and increase of the conductivity. The irra diation with doping species allows the conversion and doping of PPV fi lms in a single stage. The induced conductivity is limited by the form ation of complexes with chlorine residues through a gettering process.