Determination of the thermal activation energy and grain size of iron phthalocyanine thin films

Electrical and structural properties of iron phthalocyanine (FePc) thin films deposited onto glass substrates are studied as a function of substrate temperature and post-deposition annealing. Arrhenius plot yields thermal activation energy in the intrinsic region and impurity scattering region. X-ray diffraction pattern is used to find the average microcrystalline grain size using Scherrer's formula. Films prepared at lower substrate temperature and annealed in air at lower temperature are identified to be of a-phase with preferential orientation along (200) direction. (C) 2001 Elsevier Science B.V. All rights reserved.