|The Path to Predicting Charge-Carrier Mobilities in Organic Semiconductors: Description of the Charge Transport Parameters |
Physics and Astronomy
|Jean-Luc Bredas, School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology|
1:30 PM, Room 385E Serin Physics Lab
Conjugated organic oligomer and polymer materials are being increasingly considered for their incorporation as the active semiconductor elements in devices such as photo-voltaic cells, light-emitting diodes, or field-effects transistors. In the operation of all such devices, electron-transport processes, that is, charge carrier mobilities, do play a key role.
In this presentation, we will take a molecular/microscopic standpoint and discuss the various parameters that impact charge carrier mobilities in ordered systems:
(i) the electronic coupling between adjacent molecules or chains;
(ii) the intra- and inter-molecular reorganization energies and resulting electron-phonon couplings; and
(iii) the polarization and site energies.
In this way, structure/transport properties relationships start emerging.
The steps that still need to be taken in order to be in a position to predict carrier mobilities from first principles will be described.
Jean-Luc Bredas Homepage
Host: Vitaly Podzorov