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Light-Controlled Multiphase Structuring of Perovskite Crystal Enabled by Thermoplasmonic Metasurface.

Sergey S Kharintsev1, Elina I Battalova1, Timur A Mukhametzyanov2

  • 1Department of Optics and Nanophotonics, Institute of Physics, Kazan Federal University, Kremlevskaya, 16, Kazan 420008, Russia.

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PubMed
Summary

Researchers created single cesium lead bromine (CsPbBr3) crystals with multiple phases using a thermoplasmonic TiN/Si metasurface. This controlled multiphase structuring enhances optical properties for optoelectronics and photovoltaics.

Keywords:
halide perovskitemetasurfaceoptical heatingphase transitionthermoplasmonicstwin domains

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Area of Science:

  • Materials Science
  • Solid-State Physics
  • Optoelectronics

Background:

  • Halide perovskites are key semiconductors for photovoltaics and optoelectronics.
  • Crystal imperfections, like lattice distortions, enhance optical properties such as photoluminescence quantum yield.
  • Structural phase transitions induce distortions, creating charge gradients at interfaces.

Purpose of the Study:

  • To demonstrate controlled multiphase structuring within a single perovskite crystal.
  • To investigate the formation of single, double, and triple phase structures on demand.
  • To explore the potential for dynamically controlled heterostructures with enhanced properties.

Main Methods:

  • Utilized cesium lead bromine (CsPbBr3) perovskite material.
  • Employed a thermoplasmonic titanium nitride/silicon (TiN/Si) metasurface for controlled heating.
  • Induced structural phase transitions above room temperature to create multiphase structures.

Main Results:

  • Achieved controlled single-, double-, and triple-phase structures in CsPbBr3 crystals.
  • Demonstrated the ability to form these structures on demand using the metasurface.
  • Observed enhanced optical properties due to the controlled multiphase structuring.

Conclusions:

  • Controlled multiphase structuring in halide perovskites is feasible using thermoplasmonic metasurfaces.
  • This technique allows for the dynamic creation of heterostructures with tailored properties.
  • The approach holds promise for advanced applications in photovoltaics and optoelectronics.