Photoexcitation in poly(p-phenylene vinylene)
Synthetic Metals Elsevier 29:1 (1989) 121-127
Transient photoconductivity in highly oriented poly(p-phenylenevinylene)
Synthetic Metals Elsevier 29:1 (1989) 73-78
Third Harmonic Generation in Precursor Route Poly(p-Phenylene Vinylene)
Japanese Journal of Applied Physics IOP Publishing 28:2R (1989) 174
Photoexcitation in poly(phenylenevinylene)
Journal of molecular electronics 5:1 (1989) 19-24
Abstract:
Poly(phenylenevinylene) is a conjugated polymer with a non-degenerate ground state, and its excitations are therefore non-topological, or polaron-like. When prepared via the sulphonium polyelectrolyte salt route, it can be obtained in the form of highly oriented films, and is thus suitable for measurements of the anisotropy between intra- and inter-chain motion. We report here measurements of photoinduced absorption and photoluminescence, which detect charged and neutral photoexcitations, respectively. Photoinduced absorption below the band edge (at 2.5 eV) is characteristic of bipolarons, with absorption bands peaked at 0.6 and 1.6 eV. We consider that these are created following inter-chain separation of charge. In contrast, intra-chain excitation usually results in confined charge pairs, and the formation of polaron-excitons which can decay radiatively.Photoexcitations in Poly(2,5-Thienylene Vinylene)
MRS Advances Springer Nature 173:1 (1989) 637-642