MSE Areas: Organic photovoltaics, conjugated polymers, photoinduced electron transfer, transient microwave conductivity
Recent materials research has focused on the solid-state microstructure of conjugated polymer films, and how this property affects the optical and electronic properties. Films are studied using a variety of spectroscopic techniques, which includes transient microwave conductivity – a technique that is quite unique when used to look at organic materials. The goal is to understand how the solid-state microstructure influences the properties of excitons and charge carriers in these materials. These studies are carried out in collaboration with groups from Imperial College, Stanford University, NIST, Tempe University and University of Montreal who have expertise in polymer science, spectroscopy, electronics, x-ray diffraction, and electronic structure calculations.
Selected Publications and Accomplishments
Reid, O. G.; Malik, J. A. N.; Latini, G.; Dayal, S.; Kopidakis, N.; Silva, C.; Stingelin, N.; Rumbles, G., The influence of solid-state microstructure on the origin and yield of long-lived photogenerated charge in neat semiconducting polymers. Journal of Polymer Science Part B: Polymer Physics 2012, 50 (1), 27-37.
Morfa, A. J.; Barnes, T. M.; Ferguson, A. J.; Levi, D. H.; Rumbles, G.; Rowlen, K. L.; van de Lagemaat, J., Optical Characterization of Pristine Poly(3-Hexyl thiophene) Films. Journal of Polymer Science Part B-Polymer Physics 2011, 49 (3), 186-194.
Reese, M. O.; Nardes, A. M.; Rupert, B. L.; Larsen, R. E.; Olson, D. C.; Lloyd, M. T.; Shaheen, S. E.; Ginley, D. S.; Rumbles, G.; Kopidakis, N., Photoinduced Degradation of Polymer and Polymer-Fullerene Active Layers: Experiment and Theory. Advanced Functional Materials 2010, 20 (20), 3476-3483.