Related Experiment Video
Updated: Apr 23, 2026
11:38
Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
Published on: February 27, 2017
19.9K
Crown Ether-Based Co-Self-Assembled Monolayer Enhances the Interaction with Perovskite for High-Performance Solar
Wenzhi Niu1, Mingyuan Han1,2, Botong Li1
1Beijing Key Laboratory of Novel Thin-Film Solar Cells, North China Electric Power University, Beijing, China.
Small (Weinheim an Der Bergstrasse, Germany)
|April 22, 2026
Summary
Engineered perovskite solar cells (PSCs) using a novel mixed self-assembled monolayer (SAM) system. This strategy enhances device efficiency and stability by passivating defects and improving charge transport, achieving 25.39% power conversion efficiency.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Interface engineering is critical for perovskite solar cell (PSC) performance and longevity.
- Conventional self-assembled monolayers (SAMs) face challenges like poor film density, defect passivation, and energy level misalignment.
Purpose of the Study:
- To develop a novel multifunctional SAM for improved PSC interface engineering.
- To overcome limitations of existing SAMs by integrating multiple functions into a single system.
Main Methods:
- Designed and synthesized a new SAM (15C5Ph-4PACz) incorporating crown ether, carbazole, and phosphonic acid groups.
- Formed a mixed SAM system with Me-4PACz to leverage synergistic effects.
- Investigated the SAM's impact on interface properties, defect passivation, and charge dynamics in PSCs.
Main Results:
- The mixed SAM system effectively passivated perovskite surface defects by coordinating with Pb2+ ions.
- Achieved optimized energy level alignment, increased work function, and enhanced built-in potential.
- Fabricated inverted PSCs demonstrated a high power conversion efficiency of 25.39% and improved operational stability.
Conclusions:
- The multifunctional mixed SAM strategy offers simultaneous defect passivation and efficient charge transport management.
- This approach presents a promising route for developing high-performance and stable perovskite solar cells.
- Rational molecular design of interfaces is key to advancing photovoltaic technology.
