Determination of Activation Energies and Electric Dipole Moment of In‐Plane Highly Electrically Conductive Hetero‐C 12 TCNQ/C 20 LB Films Using Thermally Stimulated Current

The activation energies of in‐plane highly electrically conductive 2‐dodecyl‐7,7,8,8‐tetracyanoquinodimethane (C 12 TCNQ)/arachidic acid (C 20 ) hetero‐LB films and C 12 TCNQ homo‐LB films were determined by thermally stimulated current (TSC) measurement. The TSC curves for the upper Al electrode/C 12 TCNQ/C 20 /lower Al electrode were nearly of the same shape as those for the upper Al electrode/C 12 TCNQ/lower Al electrode. The activation energies of the upper Al electrode/C 12 TCNQ/C 20 /lower Al electrode and upper Al electrode/C 12 TCNQ/lower Al electrode were 0.9–1.3 eV at 55–80 ° C and 1.6–1.8 eV at 105–120 ° C, respectively. The TSC curves for the upper Al electrode/C 12 TCNQ/C 20 /lower Al electrode and upper Al electrode/C 12 TCNQ/lower Al electrode had two peaks at 55–80 ° C owing to the depolarization of the electric dipole and two peaks at 105–120 ° C owing to the movement of space charges in the C 12 TCNQ molecule. Copyright © 2008 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.