Electronic Processes 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