Evidence and implications for exciton dissociation in lead halide perovskites

Authors :: Tiwari Vandana
Duan Hong-Guang
Jha Ajay
Nayak Pabitra K.
Thorwart Michael
Snaith Henry J.
Miller R. J. Dwayne
Source :: EPJ Web of Conferences, Vol 205, p 06018 (2019)
Publication Year :: 2019
Publisher :: EDP Sciences, 2019.
Abstract: 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.

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