Advancing Self-Assembled Molecules Toward Interface-Optimized Perovskite Solar Cells: from One to Two

Area of Science:

• Materials Science
• Renewable Energy
• Nanotechnology

Background:

• Perovskite solar cells (PSCs) are a promising third-generation photovoltaic technology.
• Self-assembled monolayers (SAMs) serve as effective hole-selective layers (HSLs) in high-efficiency inverted PSCs, offering benefits like high transmittance and tunable properties.
• However, traditional SAMs face challenges including incomplete coverage and instability.

Purpose of the Study:

• To review recent advancements in co-self-assembled monolayers (co-SAMs) for perovskite solar cells.
• To analyze the design, deposition, working principles, and applications of co-SAMs.
• To provide insights into design principles for improved interface properties and guide future research.

Main Methods:

• Literature review and analysis of co-SAM strategies in perovskite solar cells.
• Discussion of molecule design and deposition techniques for co-SAMs.
• Evaluation of the impact of co-SAMs on interface properties and device performance.

Main Results:

• Co-SAMs effectively address limitations of single SAMs, such as poor coverage and weak bonding.
• Optimized co-SAMs lead to enhanced energy level alignment and reduced recombination losses.
• Improved interface properties translate to higher efficiency and stability in perovskite solar cells.

Conclusions:

• Co-SAMs represent a significant advancement for developing stable and efficient hole-selective layers in PSCs.
• Understanding co-SAM design principles is crucial for future innovations in perovskite optoelectronics.
• This approach offers a pathway to overcome current challenges in perovskite solar cell technology.