A theoretical study of photoluminescence quenching in cis-polyacetylene
Danielsen, P. L. and Ball, Robin. (1985) A theoretical study of photoluminescence quenching in cis-polyacetylene. Journal de Physique, Vol.46 (No.10). pp. 1611-1622. ISSN 0302-0738Full text not available from this repository.
Official URL: http://dx.doi.org/10.1051/jphys:019850046010016110...
The non-radiative decay of photoinduced bond-alternation defects in cis-polyacetylene is considered within the SSH model . The charge-conjugation symmetry of the simplest model Hamiltonian must be violated to explain the low photoluminescent yield (˜ 10-3 %) found experimentally. The simplest such route, that of electron-phonon coupling via second nearest-neighbour hopping is considered. It is found that a multiphonon process is required, the resulting decay rate being very sensitive to the parameters chosen. If this is the dominant non-radiative process, then it gives a potentially highly accurate method of determining the value of α, the nearest-neighbour electron-phonon coupling constant. The results for cis-polyacetylene can be generalized to give a qualitative understanding of photoluminescent properties of more complex conjugated molecules.
|Item Type:||Journal Article|
|Subjects:||Q Science > QC Physics|
|Divisions:||Faculty of Science > Physics|
|Library of Congress Subject Headings (LCSH):||Photoluminescence, Electron-phonon interactions, Polymers|
|Journal or Publication Title:||Journal de Physique|
|Page Range:||pp. 1611-1622|
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