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Progress and challenges in layered two-dimensional hybrid perovskites.

Prajna Parimita Mohanty1,2, Rajeev Ahuja1,3, Sudip Chakraborty2

  • 1Department of Physics, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India.

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Summary

Dimensionality significantly impacts material properties. Two-dimensional (2D) perovskites offer enhanced stability over 3D versions, paving the way for commercialization in solar cells.

Keywords:
crystal structure and stabilityelectronic and optical propertieselectronic strucure theoryhybrid perovskitessolar cells

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Area of Science:

  • Materials Science
  • Solid-State Physics
  • Photovoltaics

Background:

  • Bulk 3D perovskites show high power conversion efficiency but suffer from instability (moisture, temperature, ion migration).
  • Two-dimensional (2D) perovskites, with their layered organic-inorganic structure, offer improved stability.
  • Hydrophobic spacer cations in 2D perovskites protect the inorganic layers from degradation.

Purpose of the Study:

  • To provide an overview of 2D perovskite materials.
  • To discuss their structural versatility, synthesis, properties, and device applications.
  • To highlight recent advancements and future outlooks for 2D perovskites.

Main Methods:

  • Review of structural properties, including Ruddlesden-Popper and Dion-Jacobson phases.
  • Discussion of quantum confinement effects on optical and electronic properties.
  • Analysis of synthesis techniques and potential device fabrication.

Main Results:

  • 2D perovskites exhibit unique properties due to quantum confinement, such as exciton dynamics and charge transport.
  • Layered structures create natural quantum wells, and spin-orbit coupling leads to Rashba splitting.
  • Despite stability, limited charge transport and large bandgaps hinder solar cell applications.

Conclusions:

  • 2D perovskites present a promising alternative to 3D perovskites due to enhanced stability.
  • Overcoming limitations in charge transport and bandgap is crucial for widespread adoption.
  • 2D/3D multidimensional hybrid perovskites offer a synergistic approach to combine stability and performance.