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Research Abstracts Online
January 2008 - March 2009

University of Minnesota Twin Cities
Institute of Technology
Department of Chemistry

PI: Aaron Massari

In Situ Characterization of the Accumulation Layer in Organic Field Effect Transistors Utilizing Vibrational Sum Frequency Generation Spectroscopy

This project is an interdisciplinary study of the conduction channel in organic field effect transistors (OFETs). The conduction channel is typically considered a monolayer at the organic-dielectric interface. Vibrational sum frequency generation spectroscopy (VSFG) is a surface-selective probe making it an ideal tool for these studies. This project involves careful design and fabrication of OFETs. Steady-state VSFG will be used to elucidate average dipole orientations in the active layer. The data obtained is expected to reveal information on OFET performance and degradation as a function of average orientations over the lifetime of each device. The researchers are using MSI resources to verify vibrational frequencies in the VSFG spectra.

Group Member

Daniel O’Brien, Graduate Student