Interaction of Organic Surfaces with Active Species in the High-Vacuum Environment

Abstract

Using single-crystal organic field-effect transistors with the conduction channel exposed to environmental agents we have observed generation of electronic defects at the organic surface in the high-vacuum environment. Rapid decrease of the source-drain current of an operating device is observed upon exposure of the channel to the species generated by high-vacuum gauges. We attribute this effect to interaction of the organic surface with electrically neutral free radicals produced in the process of hydrocarbon cracking on hot filaments with a relatively low activation energy Ea ~ 2.5 eV (240 kJ/mol). The reported results might be important for optimizing the high-vacuum processes of fabrication and characterization of a wide range of organic and molecular electronic devices.

arXiv commentsubmitted to Appl. Phys. Lett

References in corpus (5)

• Intrinsic charge transport on the surface of organic semiconductors
• Organic Single-Crystal Field-Effect Transistors
• Field Effect Transistors on Rubrene Single Crystals with Parylene Gate Insulator
• Single-Crystal Organic Field Effect Transistors with the Hole Mobility ~ 8 cm2/Vs
• Light-induced switching in the back-gated organic transistors with built-in conduction channel

Cited by in corpus (4)

• Electronic functionalization of the surface of organic semiconductors with self-assembled monolayers
• Steady-state photoconductivity and multi-particle interactions in rubrene single crystals
• Identification of a strong contamination source for graphene in vacuum systems
• Research progress of rubrene as an excellent multifunctional organic semiconductor