Interfaces and Interfacial Layers in Inorganic Perovskite Solar Cells

Area of Science:

• Materials Science
• Photovoltaics
• Energy Conversion

Background:

• Metal halide inorganic perovskites exhibit excellent thermal stability, making them promising for solar cell applications.
• Current inorganic perovskite solar cells achieve over 20% power conversion efficiency (PCE), nearing their theoretical limit.
• Significant performance losses in inorganic perovskite solar cells stem from interfacial recombination and inefficient charge extraction.

Purpose of the Study:

• To review recent advancements in understanding the role of interfaces in inorganic perovskite solar cells.
• To explore how interfacial layers impact the performance of these devices.
• To provide an outlook on enhancing inorganic perovskite solar cell efficiency and stability through interface engineering.

Main Methods:

• Literature review of recent research on inorganic perovskite solar cells.
• Analysis of fundamental mechanisms of interfacial recombination and charge transport.
• Synthesis of current understanding regarding interface and interfacial layer effects on device performance.

Main Results:

• Interfacial traps and energy-level mismatches are primary causes of non-radiative recombination, limiting photovoltage.
• Inefficient charge extraction at interfaces degrades photocurrent and fill factor.
• Understanding and optimizing interfaces are crucial for further PCE improvements.

Conclusions:

• Optimizing interfaces and interfacial layers is critical for advancing inorganic perovskite solar cell technology.
• Future research should focus on mitigating interfacial recombination and improving charge extraction for higher efficiency and stability.
• Interface engineering presents a significant opportunity for developing next-generation, highly efficient inorganic perovskite solar cells.