Research in LabMonti is focused on obtaining a detailed understanding of interfacial processes in organic electronic devices such as organic photovoltaic cells, organic thermoelectrics or organic spin valves. Interfaces are intrinsically complex environments where two fundamentally different materials meet. As a consequence, the development of solar cells with significantly higher power conversion efficiencies or more efficient spin valves and thermoelectrics presents a major challenge.
Research in LabMonti seeks to elucidate the chemistry and physics of carriers in organic semiconductors at interfaces on the short length- and time-scales present in organic photovoltaic, spin and thermoelectric devices. We probe these interfaces with advanced stead-state and ultrafast photoelectron spectroscopies in our lab and at synchrotrons, and study self-assembly using scanned probe microscopy under highly controlled conditions. We use insights gained from this work also to understand quantum transport in organic semiconductors at the ultimate size limit.
Some of our most recent publications:
Controlling the spin-texture of topological insulators by rational design of organic molecules, S. Jakobs, A. Narayan, B. Stadtmueller, A. Droghetti, I. Rungger, Y.S. Hor, S. Klyatskaya, D. Jungkenn, J. Stoeckl, M. Laux, O.L.A. Monti, M. Aeschlimann, R.J. Cava, M. Ruben, S. Mathias, S. Sanvito, M. Cinchetti, Nano Lett., 15, 6022-6029 (2015)
Disrupted Attosecond Charge Carrier Delocalization at a Hybrid Organic/Inorganic Semiconductor Interface, D.A. Racke, L.L. Kelly, H. Kim, P. Schulz, A. Sigdel, J.J. Berry, S. Graham, D. Nordlund, and O.L.A. Monti, J. Phys. Chem. Lett. 6, 1935-1941 (2015)
The Importance of Gap States for Energy Level Alignment at Hybrid Interfaces, D.A. Racke, L.L. Kelly and O.L.A. Monti, J. Elec. Spect. Rel. Phen., 204A, 132-139 (2015)
Integer Charge Transfer and Hybridization at an Organic Semiconductor / Conductive Oxide Interface, M. Gruenewald, L.K. Schirra, P. Winget, M. Kozlik, P.F. Ndione, A.K. Sigdel, J.J. Berry, R. Forker, J.-L. Bredas, T. Fritz, and O.L.A. Monti, J. Phys. Chem. C 119, 4865-4873 (2015)
Interplay of Local and Global Interfacial Electronic Structure of a Strongly Coupled Dipolar Organic Semiconductor, N. Ilyas and O.L.A. Monti, Phys. Rev. B, 90, 125435 (2014)
Tailoring Electron-Transfer Barriers at Zinc Oxide / C60 Fullerene Interfaces, P. Schulz, L.L. Kelly, P.D. Winget, H. Li, H. Kim, P.F. Ndione, A.K. Sigdel, J.J. Berry, S. Graham, J.-L. Bredas, A. Kahn and O.L.A. Monti, Adv. Func. Mater., 24, 7381-7389 (2014)
Defect-Driven Interfacial Electronic Structure at an Organic / Inorganic Semiconductor Heterojunction, P.D. Winget, L.K. Schirra, D. Cornil, H. Li, V. Coropceanu, P.F. Ndione, A.K. Sigdel, D.S. Ginley, J.J. Berry, J. Shim, H. Kim, B. Kippelen, J.-L. Bredas and O.L.A. Monti, Adv. Materials 26, 4711-4716 (2014)
Spin-dependent trapping of electrons at spinterfaces, S. Steil, N. Grossmann, M. Laux, A. Ruffing, D. Steil, M. Wiesenmayer, S. Mathias, O.L.A. Monti, M. Cinchetti, M. Aeschlimann, Nature Physics 9, 242-247 (2013)