Recent News

9/2014 - Ciszek and Killelea groups host the local AVS

7/2014 - Jake gets tenure

5/2014 - Dan joins the lab

5/2014 - Haejun joins the lab

5/2014 - Chris leaves for med school

5/2014 - Shawn has been awarded a Mulcahy Scholarship

4/2014 - Matt leaves for the Army Research Lab

4/2014 - Brittni has been awarded a Schmitt Fellowship

4/2014 - Matt's paper has been accepted by the Journal of Organic Chemistry

Research

Organic Semiconductors

Organic semiconductors are an emerging technology that promises to revolutionize electronics and computing, especially in light-emitting diodes and field-effect transistors. In particular, we are examining acene semiconductors (tetracene, rubrene, pentacene) which have excellent electronic properties, but whose interfacial structure limits its adoption into modern displays and devices. We have developed a means for chemically reacting the surface via the classic Diels-Alder reaction (via a vapor/surface reaction) and use a variety of surface analysis techniques (XPS, PM-IRRAS, MALDI) to study the reacted surface. Device and materials properties of functionalized acenes are examined to discern their performance improvement.

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Photochromophore-Induced Electronic Effects

Applying a self-assembled monolayer (SAM) to a gold surface is an effective means for altering the Fermi level of that species (as measured by the work function). Judiciously done, this can result in alignment of the metal's energy levels with those of organic semiconductor active element. Such alignment can decrease contact resistance and results in dramatically decreased threshold voltages and up to six orders of magnitude increases in efficiences in devices such as organic solar cells, organic light-emitting diodes, and organic field effect transistors.

We are interested in examining this phenomena in the context of a stimuli-induced response. By including a photochromic (light responsive) molecule in the monolayer, we can controllably and reversibly alter the Fermi level of the surface. Importantly, spectroscopic studies of the molecular structure can be correlated to the changes in the metal's Fermi level.

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Surface Based Metal Organic Frameworks (MOFs)

This project has been discontinued

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Molecule Based Patterning

This project has been discontinued

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