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- W3195133122 abstract "We investigated the coherent evolution of the electronic spin at low temperature in high-quality CH3NH3PbI3 polycrystalline films by picosecond-resolved photoinduced Faraday rotation. We show that this coherent evolution can be tuned by choosing the pump–probe energy within the lowest optical-absorption band, and we explain it as the result of two main contributions: the localized electron and the localized hole. Their corresponding amplitude ratios are not constant across the lowest absorption band—an observation which disqualifies a free exciton from being at the origin of the electronic spin coherent evolution. We measured a spin coherence time of localized electrons (holes) of 4.4 ns (3.7 ns) at 1.635 eV, which evolves to about 7 ns at 1.612 eV (the hole coherence time remains almost constant at lower energies). Finally, we provide a global image of the spin coherent evolution in bulk metal halide perovskite, which overcomes recent controversies." @default.
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- W3195133122 date "2021-08-23" @default.
- W3195133122 modified "2023-10-05" @default.
- W3195133122 title "Energy Tuning of Electronic Spin Coherent Evolution in Methylammonium Lead Iodide Perovskites" @default.
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- W3195133122 doi "https://doi.org/10.1021/acs.jpclett.1c01790" @default.
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