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Achieving simultaneous circularly polarized luminescence (CPL) with opposite handedness introduces additional complexity in CPL modulation, which is difficult, as it requires the generation of two excited states with distinct spin orientations. Here, dual magnetic circular polarization of luminescence (MCPL) is demonstrated in BA2Pb0.8Mn0.2Br4 (BA = butylamine), where exciton and Mn2+ d-d emissions exhibit CPL with opposite handedness under an external magnetic field, with gMCPL values of -5.2/5.7 × 10−3 for exciton emission and 2.4/-2.1 × 10−3 for Mn2+ emission under ±1.6 T. Structural analyses confirm the substitution of Pb2+ with Mn2+ in the perovskite lattice, while magnetic measurements reveal the paramagnetic nature of BA2Pb0.8Mn0.2Br4, originating from the high-spin configuration of Mn2+. Zeeman splitting for both the ground state and excited state is considered for Mn2+, generating CPL signals opposite to those of exciton emission. This observation is further validated in Mn2+-doped perovskites with different organic cations and dimensions, providing a new approach for modulating multi-peak CPL with opposite handedness for applications in spintronics, quantum information, and magneto-optical technologies. © 2025 Wiley-VCH GmbH.
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Advanced Optical Materials
ISSN: 2195-1071
Year: 2025
8 . 0 0 0
JCR@2023
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