Progress of 2D Perovskite Solar Cells: Structure and Performance.

Area of Science:

• Materials Science
• Energy Science
• Photovoltaics

Background:

• 2D perovskites show promise for photovoltaic devices due to tunable bands, suppressed ion migration, and high stability.
• However, 2D perovskite solar cells (PSCs) exhibit lower efficiency than 3D PSCs, attributed to quantum and dielectric confinement effects from organic spacer cations.

Purpose of the Study:

• To provide a comprehensive review of 2D perovskite solar cells.
• To discuss methods for improving their photovoltaic performance and stability.
• To explore the integration of 2D and 3D perovskites for efficient and stable solar cells.

Main Methods:

• Review of fundamental structural characteristics, optoelectronic properties, and carrier transport dynamics of 2D PSCs.
• Discussion of approaches to enhance photovoltaic performance, including crystal orientation, phase distribution, organic layer modification, and device engineering.
• Summary of advancements in structural, humidity, thermal, and maximum power point tracking stability.

Main Results:

• 2D perovskites possess unique properties beneficial for solar cells but face efficiency challenges.
• Various strategies like crystal orientation control and device engineering can improve 2D PSC performance.
• Significant progress has been made in enhancing the stability of 2D PSCs.

Conclusions:

• Understanding the structure-performance relationship in 2D perovskites is crucial.
• Integrating 2D and 3D perovskites offers a promising pathway for developing highly efficient and stable solar cells.