Ursula Keller wins “Swiss Nobel” Marcel Benoist Prize
Farewell: the NCCR MUST ended 
MUST2022 Conference
New scientific highlights
FELs of Europe prize for Jeremy Rouxel
Ruth Signorell wins Doron prize
New FAST-Fellow Uwe Thumm at ETH
International Day of Women and Girls in Science
New scientific highlight
EU XFEL Young Scientist Award for Camila Bacellar,
Prizes for Giulia Mancini and Rebeca Gomez Castillo
Nobel Prize in Chemistry awarded to RESOLV Member Benjamin List
Hans Jakob Wörner invited to give the „New Horizons Solvay Lectures” 
Unusual keynote talk at an international scientific conference
NCCR MUST at Scientifica 2021Photocurrent detected 2D spectroscopy reveals details of multiple exciton generation in colloidal quantum dots
| Date | Do, 20.11.2014 | |
| Time | 16.30 | |
| Speaker | Prof. Tõnu Pullerits, Lund University, Sweden | |
| Location | EPFL Campus, CH G1 495 | |
| Program | ISIC Seminar in Physical Chemistry Recently there has been growing interest in the role of coherence in electronic dynamics. Coherent multidimensional spectroscopy (CMS) has been used to reveal coherent phenomena in numerous material systems. Here we utilize a recent implementation of CMS – two-dimensional photocurrent spectroscopy (2DPS), in which we detect the photocurrent from a PbS quantum dot (QD) photocell resulting from its interactions with a sequence of four ultrafast laser pulses. We observe sub-picosecond evolution of 2D spectra consistent with multiple exciton generation. Moreover, a comparison to 2D fluorescence spectra of the QDs demonstrates the potential of 2DPS to elucidate the detailed origin of photocurrent generating electronic state coherence pathways. Since the measurement is based on detecting the photocell current in situ, the method is well suited to study fundamental ultrafast processes that affect the function of the device. This opens new avenues for the investigation and implementation of coherent optimization strategies directly within devices. |
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