Abstract
A simple theoretical model is used to estimate the rates for relaxation of an exciton optically created in sexithiophene at the top of the exciton band to the emitting state at band bottom. The process is subdivided into three stages; the first two are predicted to be completed within 40 fs while the third (rate-determining) stage takes 500 fs or more. The dependence of the relaxation time on excitation energy is also investigated. The results are in good agreement with available experimental data and suggest further experiments.
- Received 11 May 2009
DOI:https://doi.org/10.1103/PhysRevB.80.115127
©2009 American Physical Society