Organic Crystals of High Conductivity

Thin films of electron donor–acceptor complexes: characterisation of mixed-crystalline phases and implications for electrical doping

“…Depending on the molecular arrangement of D and A in the crystal structure, different electrical properties can be achieved. [6][7][8] Alternating (or mixed) sequences of D and A molecules within a stack yield an insulating or semiconducting material. However, segregated stacks of equally spaced D and A molecules show high conductivities.…”

“…Segregated stacks forming dimers along the stack are again insulating or semiconducting opening a gap due to a Peierls transition. 6 Schematic representations of these stacks are given in Fig. 2.…”