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Effect of temperature on magnetic-field-controlled linearly polarized photoluminescence in PEA2PbI4 perovskites
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DOI：10.1016/j.ceramint.2026.08.152.png)
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Abstract
En 中文
Two-dimensional layered perovskites have shown great potential as magneto-optical functional materials owing to their unique excitonic structures and strong spin–orbit coupling. However, the role of linear polarization in their magneto-optical responses remains relatively underexplored. In this work, we systematically investigate the linearly polarized magneto-optical response of PEA2PbI4 using temperature-dependent and magnetic-field-dependent polarization-resolved photoluminescence spectroscopy. The results show that PEA2PbI4 exhibits a well-resolved exciton fine structure at a low temperature of 1.6 K. Under an external magnetic field, the photoluminescence intensity is significantly redistributed between two orthogonal linear polarization channels, accompanied by pronounced magnetic-field-dependent variations in both the degree of polarization and the orientation of the principal polarization axis. With increasing temperature, enhanced exciton–phonon interactions and thermal fluctuations markedly weaken the magneto-optical response. These results demonstrate that low-temperature conditions can enhance magnetic-field control over linearly polarized emission in PEA2PbI4, providing a basis for understanding the magneto-optical properties of two-dimensional perovskites and offering guidance for future material design.
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5.6
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