Tuning the Structural Rigidity of Two-Dimensional Ruddlesden-Popper Perovskites through the Organic Cation

Area of Science:

• Materials Science
• Solid-State Chemistry
• Computational Materials Science

Background:

• Two-dimensional (2D) hybrid organic-inorganic perovskites are semiconductors with tunable properties.
• Organic spacer molecules critically influence the inorganic layer structure and dynamics.
• A clear understanding of organic component effects on 2D perovskite structural parameters is lacking.

Purpose of the Study:

• Investigate the impact of varying organic cations on the structure and dynamics of 2D Ruddlesden-Popper perovskites (n=1).
• Analyze the interplay between organic and inorganic components within these materials.
• Establish structure-dynamics relationships based on organic cation characteristics.

Main Methods:

• Utilized molecular dynamics (MD) simulations.
• Simulated 2D Ruddlesden-Popper perovskites with a single inorganic layer (n=1).
• Systematically varied organic cations to study their effects.

Main Results:

• Organic cation aromaticity and linker length demonstrably affect material dynamics.
• Observed significant influence on both organic and inorganic structural components.
• Highlighted dynamic interplay between organic spacers and inorganic layers.

Conclusions:

• Organic cation design is crucial for controlling the structural and dynamic properties of 2D perovskites.
• Aromaticity and linker flexibility are key design parameters for tuning 2D perovskite behavior.
• Findings emphasize the importance of organic components in the rational design of 2D perovskite materials.