Naphthalocyanine Thin Films and Field Effect Transistors

Abstract

Naphthalocyanine (Nc) thin films have been grown by sublimation on SiO2. We have used atomic force microscopy and X-ray diffraction to show that the films are disordered for room temperature deposition, but show a highly crystalline needle-like morphology for a substrate temperature of ~200 o C. Field effect transistors exhibit p-channel operation with a mobility, which has a peak value of 0.052 cm 2 /Vs, showing a high dependence on substrate temperature. Exposure to atmosphere results in an increase in current and mobility and a reduction in threshold voltage. We compare our results with films formed from analogue molecules such as phthalocyanines and naphthalocyanine functionalised with solubilising sidegroups and discuss the potential of Nc for applications in organic electronics and sensors.

Synthesis of copper naphthalocyanine/graphene oxide composites as anode materials for lithium-ion batteries

“…Naphthalocyanine applications include organic electronic devices, 5 immune sensors, 6 solar cells, 7,8 gas sensors, 9 photodynamic therapy, 10,11 and field-effect transistors. 12…”

“…Naphthalocyanine applications include organic electronic devices, 5 immune sensors, 6 solar cells, 7,8 gas sensors, 9 photodynamic therapy, 10,11 and field-effect transistors. 12 Graphene is a honeycombed planar crystal film of carbon atoms arranged in a hexagonal lattice with sp 2 hybridisation. 13,14 The carbon-carbon bonding in graphene is similar to that in the benzene ring.…”

Self-Assembly Evolution of Metal-Free Naphthalocyanine Molecules on Ag(111) at the Submonolayer Coverage

“…Naphthalocyanine (H 2 Nc), an important class of Pc derivatives with extended π-electronic system, reveals superior optical and electronic properties. ,,− Initial investigations about the H 2 Nc molecules on surfaces are mainly focused on graphite , and insulators. , Recently, H 2 Ncs on metallic substrates such as Au(100), Au(111), , and Ag(111) , have been investigated. Among these studies, the self-assembled structures of densely packed phases such as domain orientations , and underlying mechanical strains have been studied.…”

Unidirectional supramolecular self-assembly inside nanocorrals via in situ STM nanoshaving

“…Spontaneously organized nanostructures occurring on twodimensional (2D) surfaces are of fundamental interest for the generation of novel catalytic, 1, 2 separation, 3 and charge transport [4][5][6][7] materials. For many of these surfaces to be functional, in particular in organic electronics, long range and defect free ordering over macroscopic length scales is required.…”