Ultrafast electron dynamics in a thin C60 films observed with time and angle resolved photoemission

ORAL

Abstract

C60 derivatives are common acceptor materials for organic solar cells. Time- and angle-resolved photoelectron spectroscopy (tr-ARPES) is a powerful way to study the electron dynamics in these systems. However, experiments on perturbatively excited systems are very demanding. By combining an 88 MHz ultrafast XUV source [1] with time-of-flight momentum microscopy [2], we are able to perform experiments at high speed and low excitation fluence. Here we present first demonstration results on C60 films with this technique.
[1] C. Corder, et al, Structural Dynamics 5, 054301 (2018).
[2] K. Medjanik, et. al, Nature Materials 16, 615 (2017).

*This work is supported by the U.S. Air Force office of Scientific Research under Award No. FA9550-16-1-0164, the U.S. Dept. of Energy, Office of Science, Office of Basic Energy Sciences, under Award No. DE- SC0016017, and the Stony Brook Foundation Discovery Prize.

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Presenters

  • Peng Zhao

    • Stony Brook University
    • Stony Brook University, Stony Brook, NY 11794

Authors

  • Peng Zhao

    • Stony Brook University
    • Stony Brook University, Stony Brook, NY 11794

  • Christopher Corder

    • Stony Brook University
    • Stony Brook University, Stony Brook, NY 11794

  • Jin Bakalis

    • Stony Brook University
    • Stony Brook University, Stony Brook, NY 11794

  • Michael George White

    • Stony Brook University

  • Thomas Allison

    • Stony Brook University
    • Stony Brook University, Stony Brook, NY 11794
    • Departments of Chemistry and Physics, Stony Brook University
    • Physics, Stony Brook University