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March 3, 2026Applied Physics Reviews

Design and controlled vdW epitaxy of WSe2/PbI2 heterostructure for robust momentum-direct interlayer exciton emission at room temperature

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Authors

CLChang LuMLMeili LongHLHuan Liu

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Overview

Observational analysis demonstrates robust interlayer exciton emission in vdW heterostructures, indicating potential for advanced devices.

Key Points

  • Room temperature interlayer exciton emission occurs at 1.36 eV in the bilayered 2H-WSe2/PbI2 heterostructure, showing stability and efficiency.
  • The momentum-direct interlayer exciton emission at the Γ point supports advanced excitonic devices and coherent light sources.
  • First-principle calculations and experiments confirm strong Coulomb interactions, with 84.2% intensity retention after four months.
  • Valley polarization degree of 19.58% at 83 K is maintained, highlighting the preserved valley information in interlayer excitons.

Cite This Study

Lu et al. (2026) studied this question.

synapsesocial.com/papers/69a75a6fc6e9836116a203cehttps://doi.org/10.1063/5.0312697
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