Characterization of Charge Transport and Energy Transfer Processes in Organic Semiconductors

Jean-Luc Bredas

Energy transfer and electron transfer are key processes in the operation of devices based on organic semiconductors. Here, we provide a theoretical description of the energy and electron transfer phenomena that take place in a variety of organic materials. Materials under study in our research group include single crystals of conjugated oligomers (such as oligoacenes, oligothienylenes, and their derivatives), discotic liquid crystals (based on triphenylenes and derivatives), conjugated polymers, and donor-acceptor oligomer wires.

We first focus on the characterization of the charge (electron and hole) transport processes. The intrinsic electron and hole mobilities of well-ordered materials are discussed on the basis of Marcus theory and extensions thereof.

A second topic concerns the relative efficiencies of interchain versus intrachain energy transfer processes. Here, we will discuss this issue in the framework of a theoretical approach based on an improved Forster model applied to acceptor-capped polyindenofluorene.

The P/T Colloquium is
typically held each
Thursday, 3:45–5:00 PM.
Refreshments are served
at 3:15 PM.