The Path to Predicting Charge-Carrier Mobilities in Organic Semiconductors: Description of the Charge Transport Parameters
Speaker:
Jean-Luc Bredas, School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology
Date & Time:
November 11, 2008 - 1:30pm
Location:
Room 385E Serin Physics Lab | The Path to Predicting Charge-Carrier Mobilities in Organic Semiconductors: Description of the Charge Transport Parameters Physics and Astronomy |
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| 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 http://www.bredators.gatech.edu/new/index.php Host: Vitaly Podzorov |