Feb 11, 2020 3:45 pm - Nielsen Hall 170 (Neal F. Lane Auditorium) - Colloquium
Madalina Furis - University of Vermont
A Condensed Matter Physics Perspective on Small Molecule Electronics

Organic electronics, an interdisciplinary research area traditionally more connected to organic synthetic chemistry and polymer science than condensed matter physics, is currently undergoing a major transformation. The advent of high mobility small molecule semiconductors and new avenues for scalable thin film and device fabrication introduce a new paradigm in a research field that was historically, overwhelmingly focused on polymer-based materials. 

I will describe how condensed matter experimental approaches (in particular low temperature, polarization-resolved, ultrafast, magneto-spectroscopy), in conjunction with novel solution processing techniques, reveal many-body quantum phenomena resulting from long range interactions in organic systems. Delocalized exciton coherence [1,2] and spin-dependent exchange interactions [3] manifest themselves in thin films with superior crystalline order, and can have a real impact on practical applications such as photovoltaics. I will also show how the solution processing deposition can lead to the realization of organic semiconductor alloys [4] or magnetic semiconductors. 

Probing techniques include a dual linear dichroism/photoluminescence laser scanning time-resolved microscopy and unique magneto-spectroscopy experiments performed in the Florida Helix split-coil 25T magnet at the National High Magnetic Field Laboratory (NHMFL).   

1. Rawat, N., et al., J. Phys. Chem. Lett. 2015, 6(10), 1834-1840.

2. Pan, Z., et al., Nat. Commun. 2015, 6.

3. Rawat, N., et al., Sci. Rep. 2015, 5, 16536.

4.  Manning, L. W., et al., J. Phys. Chem. C 2016, 120, 11966-11976.