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Probing charge transport in pi-stacked fluorene-based systems
Veaceslav Coropceanu1, Tamaki Nakano, Nadine E Gruhn
1School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA 30332-0400, USA. veaceslav.coropceanu@chemistry.gatech.edu
The Journal of Physical Chemistry. B
|May 12, 2006
Summary
Poly(dibenzofulvene) chains show preferential hole transport over electron transport due to specific molecular parameters. This study quanties electronic couplings and reorganization energies for pi-stacked fluorene systems.
Area of Science:
- Materials Science
- Physical Chemistry
- Organic Electronics
Background:
- Understanding charge transport in organic materials is crucial for developing advanced electronic devices.
- Poly(dibenzofulvene)s are promising materials for organic electronics due to their pi-conjugated structures.
Purpose of the Study:
- To investigate the molecular parameters governing charge transport in pi-stacked fluorene chains within poly(dibenzofulvene).
- To determine the electronic couplings and intramolecular reorganization energies for both holes and electrons.
Main Methods:
- Joint experimental and theoretical approach.
- High-resolution gas-phase photoelectron spectroscopy.
- Quantum-mechanical calculations.
Main Results:
- Identified key molecular parameters influencing charge transport.
- Quantified electronic couplings and reorganization energies for fluorene moieties.
- Found that pi-stacked fluorene chains favor hole transport over electron transport.
Conclusions:
- The study provides fundamental insights into charge transport mechanisms in poly(dibenzofulvene).
- The findings facilitate the design of organic materials with tailored charge transport properties.
- Electronic couplings and reorganization energies were compared to pentacene systems.