DOI: https://doi.org/10.29363/nanoge.emlem.2023.019
Publication date: 18th August 2023
Halide perovskites are promising semiconductors for next-generation optoelectronic and spintronic applications. Yet, we still don’t fully understand what governs the charge and spin dynamics in these materials. This is especially true when studying device-relevant thin films of halide perovskites, which lack single-crystalline perfection. In this talk, I will give an overview of our recent efforts to understand the spin-optoelectronic performance of these films better by using time-, space- and polarization-resolved optical spectroscopy and microscopy. We will find that the energetically heterogeneous energy landscape in mixed-halide perovskites can lead to the local accumulation of charges, with unexpected consequences for devices [1]; how despite strong differences in vertical diffusivity and across grains charge extraction can remain very efficient [2], and how locally varying degrees of symmetry-breaking drive spin domain formation [3,4] in this fascinating class of solution-processable semiconductors.
[1] Nature Photonics 14, 123 (2020)
[2] Nature Materials 21, 1388 (2022)
[3] Nature Materials https://doi.org/10.1038/s41563-023-01550-z (2023)
[4] Nature Reviews Materials 8, 365 (2023)
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