Self-Assembled Monolayer-Based Hole-Transporting Materials for Perovskite Solar Cells

Area of Science:

• Materials Science
• Renewable Energy
• Nanotechnology

Background:

• Self-assembled monolayers (SAMs) are widely used as hole-transporting layers (HTLs) in perovskite solar cells (PSCs).
• SAMs offer advantages like simple synthesis, molecular tunability, efficient surface modification, and scalability for device fabrication.

Purpose of the Study:

• To review recent advancements in SAM-based hole-transporting materials (HTMs) for PSCs.
• To categorize SAM-based HTMs based on synthetic strategies.
• To elucidate the structure-property relationships and working mechanisms of SAMs in PSCs.

Main Methods:

• Categorization of SAM-based HTMs by synthetic similarity.
• Analysis of SAM structure, including head, linker, and anchoring groups.
• Visualization and explanation of SAM working mechanisms in PSCs.

Main Results:

• SAMs provide effective hole transport and surface modification in PSCs.
• Anchoring group selection is crucial for SAM synthesis design.
• Structure-performance and structure-stability relationships of SAMs in PSCs were discussed.

Conclusions:

• SAMs are promising HTMs for high-performance and stable PSCs.
• Understanding SAM synthesis and mechanisms inspires the design of novel HTMs.
• Further exploration of head and anchoring groups can enhance PSC efficiency and longevity.