Related Experiment Video
Updated: Jan 9, 2026
06:49
In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation
Published on: March 2, 2021
6.7K
Aggregation-Suppressed and Synergistically Anchored Co-SAMs for High-Efficiency Stable Perovskite Solar Cells
Jiawei Zhan1,2, Qinyi Zhang1,2, Huazhong Wang1,2
1College of Textile and Clothing, Xinjiang University, Urumqi, China.
Chemsuschem
|December 9, 2025
Summary
A new co-assembled monolayer strategy using phenylphosphonic acid derivatives with Me-4PACz significantly improves hole transport layer (HTL) coverage in perovskite solar cells (PSCs). This enhances device efficiency and stability, paving the way for industrialization.
Area of Science:
- Materials Science
- Renewable Energy
- Nanotechnology
Background:
- The performance of perovskite solar cells (PSCs) is critically dependent on the properties of the hole transport layer (HTL).
- The commonly used self-assembled material, [4-(3,6-Dimethyl-9H-carbazol-9-yl)butyl]phosphonic acid (Me-4PACz), suffers from aggregation and poor coverage on indium tin oxide (ITO).
Purpose of the Study:
- To develop a co-assembled monolayer (Co-SAM) strategy to improve HTL uniformity and coverage for PSCs.
- To investigate the effect of co-dopants on Me-4PACz self-assembly and perovskite interface passivation.
Main Methods:
- Co-deposition of phenylphosphonic acid (PPA) or its derivatives with Me-4PACz to form a Co-SAM.
- Utilizing steric hindrance and synergistic dual-anchoring effects to suppress aggregation and enhance coverage.
- Employing dopants with active substituents (-OH, -NH2, -Br) for interface passivation.
Main Results:
- The Co-SAM strategy effectively suppressed Me-4PACz aggregation, leading to enhanced HTL uniformity and coverage.
- Dopants with active substituents passivated interfacial defects, optimizing carrier extraction.
- Inverted PSCs utilizing Me-4PACz+BrPPA Co-SAM achieved a power conversion efficiency (PCE) of 23.73%, a significant improvement from 21.39%.
Conclusions:
- The Co-SAM strategy offers a promising approach for developing high-performance HTLs in PSCs.
- This method enhances device efficiency and stability, contributing to the industrialization of perovskite solar technology.
