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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.
ACS Nano
|March 28, 2023
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.
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.
