Our group creates monolayer and nanoscale transistors with designed defects: both in terms of the type and concentration of defects. The combined experimental and computational research will enable greater understanding of charge transport in molecular materials.
We synthesize a range of inorganic semiconducting complexes, such as metal phthalocyanines and metal terpyridine derivatives. By changing the metal ions, we can tailor the relative electronic structure and concentrations of intentional deisgner defects. We fabricate our own chips and perform detailed electrical characterization of the materials.
Our goal is to scale down our experimental transistors and scale up our simulations to provide a 1:1 correspondence between experiment and theory, benefiting both communities. So far, our code can easily handle micron-scale devices. We have demonstrated the exact distribution of charged and neutral defects in realistic transistors and the effect of Coulomb interactions on carrier trajectories. Results correlate extremely well with experiments.
- Asymmetric Surface Potential Energy Distributions in Organic Electronic Materials via KPFM
- Monte Carlo Simulations of Charge Transport in 2D Organic Photovoltaics
- Simulating Charge Injection and Dynamics in Micro-scale Organic Field-Effect Transistors
- Charge Transport in Imperfect Organic Field Effect Transistors: Effects of Charge Traps
- Effects of Charge Localization on the Orbital Energies of Bithiophene Clusters