Ultrafast photocurrent spectroscopy of molecular electronic devices - RSC Marlow Award Lecture

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Abstract

Artem Bakulin
Imperial College London
Ultrafast photocurrent spectroscopy of molecular electronic devices Artem A. Bakulin Department of Chemistry, Imperial College London London SW7 2AZ, UK a.bakulin@imperial.ac.uk

I will present an old but well -forgotten advanced time -resolved spectroscopic technique based on the ultrafast optical control of molecular excited states followed by photocurrent detection. The method is very useful to study electronic dynamics in molecular semiconducting materials and organic optoelectronic devices , like plastic solar cells, under working conditions. 1 Using th is method , we were able to identify and track in time the precursor and charge trapping states in a variety of material systems, including polymer -fullerene blends, polyme r-oxide hybrids, colloidal quantum dots and perovskites. We show that a careful management of charge and energy dynamics in the excited st ate can substantially suppress the loss pathways and improve the device performance.
1 Bakulin A.A., Silva C., Ve lla E., Ultrafast Spectroscopy with Photocurrent Detection: Watching Excitonic Optoelectronic Systems at Work, J. Phys. Chem. Lett. 7, 250 (2016)
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  • Venue

    Theatre C, Purdie

  • Date

    April 24, 2019

  • Time

    From: 14h00 To: 15h00

  • Sponsor

    Royal Society of Chemistry

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