Excitons in quasi-one-dimensional crystalline perylene derivatives: Band structure and relaxation dynamics
Research output: Contribution to book/conference proceedings/anthology/report › Conference contribution › Contributed › peer-review
Contributors
Abstract
The exciton structure of crystalline MePTCDI (N-N'-dimethylperylene-3,4,9,10-dicarboximide) is modeled by a one-dimensional Hamiltonian, which includes the interactions between Frenkel excitons; with several vibronic levels and charge-transfer excitons. Using appropriate fitting parameters, which are verified by quantum chemical calculations, this model can explain the main features of the low temperature absorption spectrum. Polarized absorption spectra show different polarization ratios for the various peaks. This polarization behavior is explained by the varying contribution of the charge-transfer transition dipole, which has a direction different from the Frenkel transition dipole. Our model for the exciton band structure is supported by transient emission measurements.
Details
Original language | German |
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Title of host publication | Proceedings of the 2000 International Conference on Excitonic Processes in Condensed Matter |
Pages | 29-32 |
Number of pages | 4 |
Publication status | Published - 2001 |
Peer-reviewed | Yes |