Crystals of Linear Acenes: Features of Vapor Phase Growth and Some Properties

The results of studying the crystallization of anthracene, tetracene, and pentacene under conditions of physical vapor transport in growth systems with one- and two-zone thermal fields are presented. Specific features of the phase behavior and thermal stability of compounds have been investigated by differential-scanning calorimetry (DSC) and thermogravimetric analysis (TGA) in order to find the thermal modes of sublimation of materials providing crystal growth without any damage due to chemical degradation. Conditions for growing crystals on the centimeter scale (0.2–2 cm) are determined for growth systems with one- and two-zone thermal fields. A series of field-effect transistors with upper drain/source electrodes and upper gate were fabricated based on grown pentacene crystals, and their electrical characteristics were investigated.