Recently,the nanophotonics teamfrom Guangxi Universityhas achieved new breakthroughs in chiral perovskite polarization detection. The findings were published in the internationally renowned journalAdvanced Materialsunder the title“Magneto-Chiroptical Hybrid Perovskites with Anomalous Photovoltaic Effect for High-Performance Self-Driven Photodetectors”.Wu Jie,a doctoral studentof the2023cohortfrom the School of Physical Science andTechnology, serves as theleadauthor,and the corresponding author isProf. Dr.Zeng Ruosheng from the same school.Guangxi Universityserves as the first affiliation and theexclusivecorresponding unit.

Conventional organic-inorganic hybrid perovskite photodetectors typically require external electric field drive, exhibit limited functionality, suffer from high energy consumption, and demonstrate mediocre polarization detection performance. To address these challenges, our nanophotonics team introduced chiral organic molecules to engineer two-dimensional chiral perovskite crystals with non-centrosymmetric structures.This material not only possesses outstanding spontaneous polarization characteristics (1.5 μC·cm⁻²) but also exhibits unique magneto-optical coupling effects. Under a 1 T magnetic field, its circular dichroism (CD) asymmetry factor increases by 8-fold, accompanied by signal inversion, with a Zeeman splitting energy reaching 0.3 meV.Furthermore, the material demonstrates exceptional nonlinear optical properties, achieving a circular polarization sensitivity of 0.87 for second-harmonic generation (SHG), far surpassing comparable materials.The self-driven photodetector fabricated from this material generates a remarkable photovoltage of 4.8V under 405 nm ultraviolet illumination—significantly exceeding its bandgap (2.96 eV)—exhibiting a pronounced anomalous photovoltaic effect. The device achieves a responsivity of 583 at zero bias while maintaining excellent X-ray detection and circularly polarized light discrimination capabilities.These properties make the material highly promising for applications in portable medical imaging, security monitoring, and optical communications, offering a new pathway for developing next-generation, low-energy, multifunctional optoelectronic systems.

Figure 1.StructuralCharacterization of (R/S)-3BrMBA₂PbBr₄

Figure 2. CircularlyPolarizedOpticalProperties andMagneto-circularDichroism (MCD)Spectra of (R/S)-3BrMBA₂PbBr₄

It is reported thatGuangxiUniversity’s nanophotonics team, rooted in interdisciplinary cutting-edge research, represents a collaborative research collective integrating expertise in chemistry, materials science, and physics. The team has achieved a series of innovative breakthroughs in exploring the luminescent properties and applications of high-performance perovskite materials.