Electrical properties of thin films of poly [1, 2-acenaphthenediylidene-(3, 5, 6, 8-tetranitro-1, 2-acenaphthenediylidene)]

Abstract

The dependence of the dark electrical conductivity of poly [1, 2-acenaphthenediylidene-(3, 5, 6, 8-tetranitro-1, 2-acenaphthenediylidene)] films has been investigated as a function of their thickness, ranging between 150 and 900 nm, of the temperature (291–413 K) and the frequency (0.2–10 kHz) of the applied electric field. The thermal activation energy of the dc conductivity of the samples is found to be 0.8 eV in air and 0.7 eV in vacuum. The ac conductivity is 2 or 3 orders of magnitude higher than the dc conductivity. It increases nearly linearly with frequency and depends very slightly on temperature in the greater part of the temperature range under investigation. The experimental data are interpreted in favor of a hopping mechanism of conductivity.