Peering into interfaces in perovskite solar cells: a first-principles perspective

Area of Science:

• Materials Science
• Renewable Energy
• Computational Physics

Background:

• Perovskite solar cells (PSCs) show rapid development and high efficiency.
• Halide perovskites offer significant promise for photovoltaics.
• Enhancing PSC efficiency and stability requires further research, particularly in interfacial engineering.

Purpose of the Study:

• To review recent theoretical advancements in profiling perovskite interfaces.
• To focus on the impact of energy band alignment and electronic structure on carrier transport.
• To provide theoretical guidance for experimental research and device optimization.

Main Methods:

• Utilizing first-principles calculations to characterize interfaces in PSCs.
• Analyzing atomic and electronic properties at perovskite interfaces.
• Profiling interfaces between halide perovskites and other materials.

Main Results:

• First-principles calculations reveal key interfacial properties influencing PSC performance.
• Understanding energy band alignment and electronic structure is crucial for carrier transport.
• Interfacial engineering significantly enhances PSC efficiency and stability, with some cells exceeding 26% efficiency for over 1000 hours.

Conclusions:

• First-principles calculations are vital for understanding PSC interfacial physics.
• Theoretical insights guide material design for improved carrier separation and transport.
• Addressing challenges in interface modeling is key for future PSC optimization.