Modeling hybrid perovskites by molecular dynamics

Area of Science:

• Materials Science
• Computational Chemistry
• Solid-State Physics

Background:

• Hybrid perovskites, particularly methylammonium lead halide (MAPI), are rapidly advancing solar materials.
• These materials exhibit unique organic-inorganic crystalline structures, combining semiconductor electronic properties with solution processability.

Purpose of the Study:

• To review recent progress in molecular dynamics (MD) simulations for modeling hybrid perovskites.
• To discuss the advantages and limitations of ab initio and classical MD approaches for studying MAPI properties.

Main Methods:

• Explanation of ab initio and classical molecular dynamics concepts.
• Description of model potentials for hybrid perovskites, focusing on a simple ionic model.
• Analysis of simulation time and length scales relevant to hybrid perovskite properties.

Main Results:

• Showcase applications of MD in MAPI include studying molecular cation disorder and vibrational properties.
• MD simulations reveal insights into thermally activated defect diffusion and thermal transport.
• Comparison of ab initio and classical MD methods highlights their respective strengths and weaknesses.

Conclusions:

• Molecular dynamics simulations are essential for comprehensively studying hybrid perovskite properties.
• Ongoing advancements in MD modeling will further enhance our understanding and application of these materials.
• The review provides a roadmap for future research in hybrid perovskite simulations.