Charge Mobility of Organic Semiconductors under High Pressure. Anthracene

Abstract

Abstract The charge mobilities of anthracene single crystals were measured under high pressures up to 7.4 kbar. An experimental apparatus like Kepler’s was used. A sample holder was attached in a Drickamer-type high-pressure photocell, with kerosene employed as the pressure-transmitting fluid. The electron mobilities along the a and b crystal axes increased as the pressure applied increased; the values of the charge drift mobility at 7 kbar were 1.7 times as large as those at atmospheric pressure. The electron mobility along the c′ axis was nearly constant. The hole mobility, however, could not be measured, because the tail of the pulse signal, observed on the oscilloscope, was deformed.