Imaging carrier diffusion in perovskites with a diffractive optic-based transient absorption microscope

Custom DOE used
Published on:
Authors: Guo, Zhenkun; Zhou, Ninghao; Williams, Olivia F.; Hu, Jun; You, Wei & Moran, Andrew M.
Abstract:

“Carrier diffusion is imaged in a perovskite film and crystal using a newly developed transient absorption microscope. Wide-field imaging is combined with a diffractive optic-based beam geometry to conduct 41 transient absorption experiments in parallel in this experimental setup. This configuration allows statistics to be quickly compiled with a 1 kHz laser system. Diffusion coefficients of 0.01 and 0.20 cm2/s are obtained for the methylammonium lead iodide film and crystal, respectively. Our data suggest that the dynamics in the film are dominated by intensity dependence of the carrier lifetimes as opposed to carrier diffusion. The small diffusion coefficients determined in the film are attributed to the presence of grain boundaries.”

Restricted Access

Publication: The Journal of Physical Chemistry C
Issue/Year: The Journal of Physical Chemistry C, Volume 122; Number 19; Pages 10650–10656; 2018
DOI: 10.1021/acs.jpcc.8b03643.
Link: https://doi.org/10.1021/acs.jpcc.8b03643.

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