https://doi.org/10.1051/epjconf/201920506019
Monitoring hot exciton dissociation in hybrid lead halide perovskite films with sub-10 fs pulses
Institute of Chemistry, The Hebrew University, Jerusalem 91904, Israel
* Corresponding author: sandy@mail.huji.ac.il
Published online: 16 April 2019
Sub-10 fs pump-probe experiments on methylammonium lead halide (MAPbI3) perovskite films show hot exciton dissociation in 20 fs after photo-excitation with ~0.7 eV excess energy compared to its optical band gap (BG). Coherent wave packets were also detected in the form of spectral modulation, revealing electron-phonon coupling in these materials. The estimated electron-phonon coupling strengths from the frequency and amplitude of the detected spectral modulation are in the weak regime, suggesting formation of large polaron.
© The Authors, published by EDP Sciences, 2019
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