• • Achieved a photocurrent dissymmetry factor (g_Iph) of 0.5 at zero bias, surpassing the typical <0.3 for most CHP-based detectors, enabling reliable discrimination of left- and right-handed circularly polarized light for secure quantum communication and spin-optoelectronics.
• • Demonstrated self-powered CPL detection at an ultralow light intensity of 62 nW cm−2, with a responsivity of 71 mA W−1 and detectivity of 6×10^12 Jones, outperforming prior CHP detectors (e.g., (S-MBA)2PbI4: 2.2×10^11 Jones; (R-α-PEA)PbI3: ~7.1×10^11 Jones; (R-BPEA)2PbI4: ~3×10^11 Jones), enabling weak-signal detection in low-photon-flux environments.
• • The multilayered Cs-based chiral-polar perovskite (R-β-MPA)PACsPb2Br7 crystallizes in a polar space group, exhibiting a chiral-polar photovoltaic effect that facilitates spin-selective carrier separation and collection, effectively decoupling chiroptical activity from charge transport.
• • The device operates at zero bias (self-powered), significantly suppressing dark current and maintaining polarization selectivity down to 62 nW cm−2, which is critical for energy-efficient, miniaturized CPL sensors in satellite communication and biomedical imaging.