Two-dimensional halide perovskites: synthesis, optoelectronic properties, stability, and applications

Area of Science:

• Materials Science
• Solid-State Physics
• Optoelectronics

Background:

• Halide perovskites are key materials for optoelectronic applications.
• Two-dimensional (2D) perovskites, including nanoplatelets and layered structures (Ruddlesden-Popper, Dion-Jacobson), offer improved stability, structural flexibility, and quantum confinement compared to 3D analogs.
• These properties make 2D perovskites highly attractive for advanced light-emitting and harvesting technologies.

Purpose of the Study:

• To provide a comprehensive review of recent advancements in both colloidal and non-colloidal 2D halide perovskites.
• To discuss synthesis strategies, shape control, crystalline phases, and optoelectronic properties of 2D perovskites.
• To highlight the stability advantages and diverse applications of 2D perovskites.

Main Methods:

• Review of recent literature on 2D halide perovskite synthesis and characterization.
• Analysis of structure-property relationships in 2D perovskite systems.
• Compilation of application-focused studies in solar cells, LEDs, lasers, photodetectors, and photocatalysis.

Main Results:

• 2D halide perovskites exhibit tunable optoelectronic properties due to quantum confinement and structural diversity.
• Various synthesis methods allow control over shape, size, and crystalline phase.
• Demonstrated applications in high-performance solar cells, efficient light-emitting diodes, lasers, photodetectors, and photocatalysis.
• Enhanced moisture, thermal, and photostability compared to 3D perovskites.

Conclusions:

• 2D halide perovskites are a versatile class of materials with significant potential for next-generation optoelectronics.
• Their unique properties and improved stability make them promising candidates for various light-related applications.
• Continued research into synthesis and device integration will further unlock their capabilities.