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Lecture Frank Spano


19 January 2007 FWN-Building 5118.-156, Nijenborgh 4, 9747 AG, Groningen
Speaker:Prof. Dr. Frank Spano
Affiliation:Temple University, Philadelphia, USA
Title:Modeling optical excitations in aggregates, films and crystals of conjugated oligomers
Date:Fri Jan 19, 2007
Location:FWN-Building 5118.-156
Host:Jasper Knoester
Telephone:+31 50 363 4369


Exciton-phonon coupling and disorder profoundly influence the photophysical properties of aggregates, thin films and crystals of thiophene and phenylene vinylene based oligomers and polymers. Calculations of the photoluminescence spectrum in model herringbone aggregates are presented, based on a Holstein-type Hamiltonian accounting for the coupling of one or more totally symmetric intramolecular vibrational modes (phonons) to the main optical transition. Structural and point defects are also included. The model predicts unique properties for the 0-0 emission in comparison to the side-band emission in excellent agreement with experiment.
Last modified:22 October 2012 2.30 p.m.