Interlayer Bonding in Two-Dimensional Materials: The Special Case of SnP₃ and GeP₃

Area of Science:

• Materials Science
• Condensed Matter Physics
• Nanotechnology

Background:

• Two-dimensional (2D) heterostructures are key for advanced optoelectronic devices.
• Weak van der Waals forces in current heterostructures limit property tuning.
• Novel materials with strong interlayer interactions are needed.

Purpose of the Study:

• Investigate optoelectronic properties of 2D MP3 (M = Ge, Sn) materials.
• Explore the impact of strong interlayer interactions on material characteristics.
• Assess suitability for photoconversion applications.

Main Methods:

• Density Functional Theory (DFT) calculations.
• Many-body perturbation theory (MBPT) application.
• Analysis of electronic structure, charge transport, and optical properties.

Main Results:

• 2D MP3 materials exhibit significant intrinsic vertical strain (~40%).
• Strong interlayer hybridization profoundly affects electronic and optical properties.
• Observed continuous optical absorption across the visible spectrum.
• High charge carrier mobility demonstrated.

Conclusions:

• 2D MP3 materials offer tunable optoelectronic properties due to strong interlayer interactions.
• These materials are highly promising for next-generation photoconversion technologies.
• The unique properties stem from intrinsic strain and hybridization.