Neutral photo-excitations in oriented polyacetylene
- 20 September 1987
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 20 (26), 4221-4228
- https://doi.org/10.1088/0022-3719/20/26/022
Abstract
Polarisation-dependent measurements of photo-induced absorption (PA) have been carried out on highly oriented films of polyacetylene prepared by the Durham precursor route. For temperatures below 100 K, the PA spectrum exhibits an absorption peak at 1.36 eV, as observed for Shirakawa polyacetylene. This feature is due to a neutral excited state. The PA peak is independent of probe-beam polarisation and some 200 times weaker than in Shirakawa samples. These results suggest that the neutral excitations are rendered metastable by interactions with existing structural defects in the polymer.Keywords
This publication has 29 references indexed in Scilit:
- Photoexcitation in poly(arylenevinylenes)Synthetic Metals, 1987
- Correlation effects and excited states in conjugated polymersPhysical Review B, 1986
- Durham poly acetylene: preparation and properties of the unoriented materialSynthetic Metals, 1986
- Photogenerated solitonic states intrans-polyacetylenePhysical Review B, 1985
- Photoinduced absorption and luminescence in polydiacetylenesJournal of Physics C: Solid State Physics, 1984
- Photoexcitations intrans-: A Fourier-Transform Infrared StudyPhysical Review Letters, 1983
- Optical absorption from polarons in a model of polyacetylenePhysical Review B, 1983
- Low lying yrast states of 32SJournal de Physique Lettres, 1983
- Solitons in polyacetylene and relativistic-field-theory modelsPhysical Review B, 1981
- A new synthesis of poly(acetylene)Polymer, 1980