Rachelle Austin
Speaker's Institution
Colorado State University
4:00 PM
Virtual Seminar
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Literature Seminar

Perovskite thin films hold remarkable promise for solar energy conversion applications due to their efficient long-range carrier transport. To maximize solar conversion efficiency, the mechanisms of carrier extraction, transport, and decay must be understood. In the presented study1, Transient Absorption Microscopy (TAM) is used to map carrier generation, diffusion, and recombination within methylammonium lead triiodide perovskite thin films. The TAM images directly visualize heterogenous carrier generation and transport, while the corresponding diffusion model quantifies the effects of higher-order recombination. Variations of diffusion coefficients within different sample regions suggests local crystal morphologies affect carrier generation and transport and highlight that selective morphology tailoring of perovskite films is required to maximize carrier extraction for solar energy conversion.

1. Guo, Z., Manser, J. S., Wan, Y., Kamat, P. V., & Huang, L. (2015). Spatial and temporal imaging of long-range charge transport in perovskite thin films by ultrafast microscopy. Nat. Commun.6, 4–11. https://doi.org/10.1038/ncomms8471


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