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July 3, 2026Reports on Progress in PhysicsOpen Access

Switchable band alignment in 2D-perovskite/WS 2 heterostructures for tunable exciton transport and valley polarization

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Authors

YCYingying ChenZLZeyi LiuZGZisheng Gong

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Overview

Randomized trial demonstrates control of exciton states in 2D heterostructures, suggesting advancements in nanophotonic circuits.

Key Points

  • This research aims to achieve dynamic control of exciton states through electrically tunable band alignment in 2D heterostructures.
  • Implemented tunable band alignment transitions between type-I and type-II in WS2/(iso-BA)2PbI4 heterostructures.
  • Measured ON/OFF control of exciton transport and valley polarization switching.
  • Evaluated exciton states to demonstrate functionalities in nanophotonic circuits.
  • Achieved 7 μm ON/OFF control for exciton transport between delocalized IX⁻ and confined X⁻ states.
  • Demonstrated a valley polarization switching with a 16.3 ON/OFF ratio for distinct spin-valley configurations.
  • Establishment of a broadly hybrid 2D system independent of stacking alignment for diverse applications.

Cite This Study

Chen et al. (2026) studied this question.

synapsesocial.com/papers/6a4750f45c29257aa25786e4https://doi.org/10.1088/1361-6633/ae846f
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