John Anthony1
University of Kentucky1
The strong relationship between solid-state order and charge transport properties in organic solids is well known; even minuscule shifts in intermolecular contacts arising from simple molecular vibrations can lead to significant changes in hole or electron mobility. I will present a substantial array of linearly-fused chromophores functionalized to induce strong, two-dimensional π-stacking interactions ideal for thin-film charge transport, and show that minuscule changes to the functional groups - for example the deletion of just a few hydrogen atoms - can completely change the crystal packing arrangement. I will also show how stronger non-covalent interactions, such as hydrogen bonding, can be detrimental to thin-film formation. I will finally present several new chromophore designed to minimize the impact of long-axis phonon modes, to substantially improve transistor performance.