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Modulating magneto-photoluminescence effects in 3D lead halide perovskites via halide-component dependent Rashba

Zhen Wang1, Jifan Xie1, Jiayu Zheng2

  • 1School of Integrated Circuits, Chongqing University of Posts and Telecommunications, Chongqing 400065, China.

The Journal of Chemical Physics
|August 22, 2025
PubMed
Summary

Giant Rashba spin-orbit coupling (SOC) in 3D lead halide perovskites (LHPs) influences luminescence. Magneto-photoluminescence (Magneto-PL) reveals tunable negative magneto-PL effects in 3D LHPs, suppressed by magnetic fields.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Optoelectronics

Background:

  • Three-dimensional lead halide perovskites (3D LHPs) possess significant Rashba spin-orbit coupling (SOC).
  • The precise influence of Rashba SOC on the luminescence dynamics of 3D LHPs is not fully understood.
  • Understanding spin-related opto-physical processes is crucial for advanced optoelectronic applications.

Purpose of the Study:

  • To investigate the impact of Rashba SOC on the luminescence dynamics of 3D LHPs.
  • To utilize magneto-photoluminescence (Magneto-PL) as a tool to probe spin-related phenomena.
  • To establish a connection between Rashba SOC tunability and material properties.

Main Methods:

  • Magneto-photoluminescence (Magneto-PL) spectroscopy at room temperature.
  • Crystallographic analysis of 3D LHP thin films.
  • Tuning halide compositions (Br, I, Cl) to modify Rashba SOC.

Main Results:

  • Observed tunable, negative magneto-PL effects in 3D LHPs, indicating luminescence suppression by magnetic fields.
  • Achieved a maximum magneto-PL magnitude of -3.60% in CH3NH3PbIxCl3-x thin films at ±1 T.
  • Demonstrated that Rashba SOC is tunable and correlates with crystalline phase transitions and grain size.

Conclusions:

  • The interplay of Rashba SOC-driven spin mixing and Zeeman splitting influences exciton dynamics.
  • Modulating halide components allows tuning of Rashba SOC and magneto-PL effects.
  • This research provides a pathway to enhance luminescence in opto-spintronics materials by controlling Rashba SOC.