Perovskite system preserves spin polarization for approximately 5 nanoseconds

Researchers led by HKUST's Lu Haipeng developed a perovskite system that preserves spin polarization approximately 300 times longer at room temperature, reaching approximately 5 nanoseconds. The study was published in Nature Photonics. The material uses successive quantum wells of varying widths to transfer spin information along an energy gradient while reducing losses. Spin-dependent charge transport showed a polarization degree exceeding 80%. The team also demonstrated proof-of-concept circularly polarized light detection and X-ray-triggered dissymmetric photopolymerization. These remain laboratory demonstrations of the material's properties and applications.