The Department of Physics and Astronomy invites all to a colloquium featuring Dr. Oana D. Jurchescu, Department of Physics, Wake Forest University. Dr. Jurchescu will present her talk, “Charge Transport in Organic and Hybrid Field-Effect Transistors”, Tuesday, October 18, at 4:10 p.m. in Webster 17.
Meet for refreshments before the lecture at 3:45 – 4:10 p.m. in the foyer on floor G above the lecture hall.
Abstract: Organic semiconductors are becoming increasingly attractive given their solution processability, which allows for low-cost production on flexible media like paper, plastic, or textiles. But in spite of these advantages, the complexity of the film formation resulting from solution growth process makes it challenging to control the device performance in a reliable way. In this talk I will discuss the growth, structure and electronic properties of organic thin-film transistors deposited by scalable solution deposition methods, such spray deposition or vibration-assisted crystallization. The results will be compared with those obtained in single crystal devices and several approaches to improve film quality and device performance will be presented. The effect of processing parameters on charge carrier mobilities, on/off ratios and interfacial trap densities will be detailed. Transitioning from mono-molecular crystals to multi-component materials, such as the organic charge transfer complexes, which are combinations of charge donating (D) and charge accepting (A), I will show examples on how novel functionalities can emerge from D/A intermolecular interactions.
