Light-Enhanced Spin Diffusion in Hybrid Perovskite Thin Films and Single Crystals.
KAUST DepartmentPhysical Science and Engineering (PSE) Division
Online Publication Date2019-12-20
Print Publication Date2020-01-15
Embargo End Date2020-12-21
Permanent link to this recordhttp://hdl.handle.net/10754/661005
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AbstractOrganolead trihalide perovskites have attracted substantial interest with regard to applications in charge-based photovoltaic and optoelectronic devices because of their low processing costs and remarkable light absorption and charge transport properties. Although spin is an intrinsic quantum descriptor of a particle and spintronics has been a central research theme in condensed matter physics, few studies have explored the spin degree of freedom in the emerging hybrid perovskites. Here, we report the characterization of a spin valve that uses hybrid perovskite films as the spin-transporting medium between two ferromagnetic electrodes. Because of the light-responsive nature of the hybrid perovskite, a high magnetoresistance of 97% and a large spin-diffusion length of 81 nm were achieved at 10 K under light illumination in polycrystalline films. Furthermore, by using thin perovskite single crystals, we discovered that the spin-diffusion length was able to reach 1 μm at low temperatures. Our results indicate that the spin relaxation is not significant as previously expected in such lead-containing materials and demonstrate the potential of low-temperature-processed hybrid perovskites as new active materials in spintronic devices.
CitationLi, F., Ding, J., Yu, W., Guan, X., Wang, P., Wu, D., & Wu, T. (2020). Light-Enhanced Spin Diffusion in Hybrid Perovskite Thin Films and Single Crystals. ACS Applied Materials & Interfaces. doi:10.1021/acsami.9b18562
SponsorsThis work was supported by the King Abdullah University of Science and Technology (KAUST).
PublisherAmerican Chemical Society (ACS)