Electronic Processes in Organic Semiconductors

Anna Köhler has been Professor and Chair of Experimental Physics II at the University of Bayreuth, Germany, since 2007. After completing her PhD 1996 with Sir Richard Friend at the University of Cambridge, UK, she held Research Fellowships at Peterhouse, Cambridge, and at the Royal Society, UK. She was appointed Professor at the University of Potsdam, Germany, in 2003. Her research centres on the photophysical properties of organic semiconductors, with a focus on energy and charge transfer processes in singlet and triplet excited states. Heinz Bässler is retired Professor at the Bayreuth Institute of Macromolecular Research (BIMF) at the University of Bayreuth, Germany. From 1970 to 2002 he worked as Professor in the Department of Physical Chemistry at the Philipps University in Marburg in Germany, having obtained his PhD degree in Physics from the Technical University in Munich, Germany, in 1963. His research interest concerns the optoelectronics of organic solids with particular emphasis on charge transport and on the spectroscopy of conjugated polymers. He is widely recognized for his studies on the effects of disorder in organic semiconductors.

1 The Electronic Structure of Organic Semiconductors
1.1 Introduction
1.2 Different Organic Semiconductor Materials
1.3 Electronic States of a Molecule
1.4 Transitions between Molecular States
1.5 Spectroscopic Methods
1.6 Further Reading
References

2 Charges and Excited States in Organic Semiconductors
2.1 Excited Molecules from the Gas Phase to the Amorphous Film
2.2 Excited Molecules in Crystalline Phases -
The Frenkel Exciton
2.3 Excited States in pi-Conjugated Polymers
2.4 Charged Molecules
2.5 A Comparison between Inorganic and Organic Semiconductors
2.6 Further Reading
References

3 Electronic and Optical Processes of Organic Semiconductors
3.1 Basic Aspects of Electrical Current in a Device
3.2 Charge Injection Mechanisms
3.3 Charge Carrier Transport
3.4 Non-Geminate Charge Carrier Recombination
3.5 Generation of Excitations
3.6 Dissociation of Excitations
3.7 Di¿usion of Excitations
3.8 Decay of Excitations
3.9 Further Reading
References

4 Fundamentals of Organic Semiconductor Devices
4.1 Basic Solar Cells and Light-Emitting Diode Structures
4.2 Solar Cell Performance
References

Chemical Structures
A.1 Selected Polymers
A.1.1 pi-Conjugated Homopolymers
A.1.2 pi-Conjugated Copolymers
A.1.3 Other Polymers of Interest
A.2 Selected pi-Conjugated Low-Molecular Weight Compounds
A.3 Selected Phosphorescent Compounds
A.4 Non-Conjugated Low-Molecular Weight Compounds