65 citations · 197 across the 7 of their papers we have counts for
7 papers
Incoherent population mixing contributions to phase-modulation two-dimensional coherent excitation spectra
Pascal Grégoire, Ajay Ram Srimath Kandada, Eleonora Vella +2
We present theoretical and experimental results showing the effects of incoherent population mixing on two-dimensional (2D) coherent excitation spectra that are measured via a time…
Excitonic coupling dominates the homogeneous photoluminescence excitation linewidth in semicrystalline polymeric semiconductors
Pascal Grégoire, Eleonora Vella, Matthew Dyson +6
We measure the homogeneous excitation linewidth of regioregular poly(3-hexylthiophene), a model semicrystalline polymeric semiconductor, by means of two-dimensional coherent photol…
Probing polaron excitation spectra in organic semiconductors by photoinduced-absorption-detected two-dimensional coherent spectroscopy
Hao Li, Aurelie Gauthier-Houle, Pascal Gregoire +3
We report a theoretical description and experimental implementation of a novel two-dimensional coherent excitation spectroscopy based on quasi-steady-state photoinduced absorption…
Do ultrafast exciton-polaron decoherence dynamics govern photocarrier generation efficiencies in polymer solar cells?
E. Vella, H. Li, P. Gregoire +7
All-organic-based photovoltaic solar cells have attracted considerable attention because of their low-cost processing and short energy payback time. In such systems the primary dis…
Two-dimensional coherent photocurrent excitation spectroscopy in a polymer solar cell
Eleonora Vella, Pascal Grégoire, Hao Li +6
In high-performance solar cells based on polymeric semiconductors, the mechanism of photocarrier generation on -fs timescales is yet to be unravelled. In particular the dynam…
Temperature dependence of reflectivity of amorphous silicon dioxide: Evidence of delocalized excitons weakly scattered by phonons
E. Vella, F. Messina, M. Cannas +1
We studied the reflectivity spectra of amorphous silicon dioxide detected under vacuum UV synchrotron radiation as a function of temperature between 10 and 300 K. Kramers-Kronig di…