Electronic Conduction in Complexes of Aromatic Hydrocarbons with Iodine

摘要

Molecular complexes of the aromatic hydrocarbons pyrene and perylene with iodine were found to have an electronic conductivity 10 to 12 orders of magnitude higher than that of the constituent compounds. The specific resistivities measured were 75 and 8 ohmhyphen;cm, respectively. The materials behaved like semiconductors and plots of log sgr; vs 1/Tgave activation energies of 0.14 ev and 0.019 ev. No Hall effect could be found, but an upper limit for the mobility of mgr;le;.01 cm2vmdash;1secmdash;1could be set. Single crystals of the perylenehyphen;iodine complex were obtained. The preparation and identification of the complexes are discussed and the results of a phase study on the system of pyrene and iodine are reported.