EPJ Web of Conferences (Jan 2019)

Evidence and implications for exciton dissociation in lead halide perovskites

  • Tiwari Vandana,
  • Duan Hong-Guang,
  • Jha Ajay,
  • Nayak Pabitra K.,
  • Thorwart Michael,
  • Snaith Henry J.,
  • Miller R. J. Dwayne

DOI
https://doi.org/10.1051/epjconf/201920506018
Journal volume & issue
Vol. 205
p. 06018

Abstract

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We have employed ultrafast transient-grating and two- dimensional electronic spectroscopy to probe dynamics of photo-excited CH3NH3PbI3 thin films with 16-fs temporal resolution. We distinctly capture the 30-fs decay of excitons, weakly coupled to the phonons.