Morphological evolution of nanocrystalline metal phthalocyanines and their applications in field-effect transistors

摘要

Complex micro-architectures of cobalt phthalocyanine (CoPc) and cobalt hexadecafluorophthalocyanine (F16CoPc) were grown via physical vapour deposition (PVD) method. For CoPc, the formation of "broom" architectures depends mainly on imposed pressure. While for F16CoPc, the emergence of intricate cluster or "flower" is mostly determined by furnace temperature. We show organic materials with it-conjugated structure could be purposefully sculpted into various morphologies through programmed modulations of environmental conditions. The morphological evolution of simple nanostructure to complex architecture was proposed. Further, the CoPc and F16CoPc crystals were applied to organic field-effect transistors (OFET) with hole and electron mobility of 0.56 and 0.23 cm(2) V-1 s(-1) respectively. (C) 2017 Elsevier B.V. All rights reserved.