ABSTRACT
Organic conductivity is an extensive and rich ›eld. Decades of scienti›c work has resulted in many interesting products, such as conducting organic polymers, organic light-emitting diodes (OLED), and organic superconductors. Yet, most organic crystals are semiconductors with a large band gap. Aromatic molecules with low excited states absorb in the visible or lower ultraviolet (UV) region at 2-4 eV. Crystals of anthracene and pentacene (Figure 18.1) have been used as model systems for studies of charge separation, electron mobility and exciton mobility.
