Researchers from the Hong Kong University of Science and Technology (HKUST) and the Hong Kong Polytechnic University (PolyU) have developed a laminated interface microstructure that enhances the stability and efficiency of inverted perovskite solar cells. By creating a three-ply structure consisting of a molecular passivation layer, a fullerene derivative layer, and a 2D perovskite layer on the perovskite film surface, the team significantly reduced interface defects and improved energy level alignment. This advancement increased photoelectric conversion efficiency and enhanced durability under damp-heat and light soaking conditions.
The research, led by Prof. Zhou Yuanyuan of HKUST and Dr. Guo Pengfei, was published in Nature Synthesis on April 29, 2025, highlighting the potential for perovskite solar cells to replace traditional silicon-based alternatives in various applications.
Inverted perovskite solar cells present unique challenges primarily due to interface defects between the fullerene-based electron transport layer and the perovskite surface. These defects significantly impair device performance and stability, making them a critical issue in achieving reliable energy conversion.
The accumulation of these defects leads to reduced efficiency and durability under real-world conditions such as damp heat and prolonged light exposure. This instability hinders the practical application of inverted perovskite solar cells despite their potential advantages over traditional silicon-based alternatives.
To address this, researchers have developed a three-ply laminated structure that effectively reduces interface defects. This innovative approach enhances energy level alignment, thereby improving both efficiency and durability under challenging conditions. The laminated perovskite solar cells demonstrate superior performance, offering a promising solution to the existing challenges.
This advancement not only resolves immediate issues but also opens new avenues for future developments in perovskite optoelectronics. By focusing on precise structural modifications, researchers have set a foundation for more stable and efficient solar cell technologies, highlighting the importance of addressing interface challenges in material science.
Innovative Laminated Interface Solution
The collaborative research team from HKUST and PolyU addressed the critical issue of interface defects in inverted perovskite solar cells by introducing a novel three-ply laminated structure. This structure consists of a molecular passivation layer, a fullerene derivative layer, and a 2D perovskite layer, which collectively reduce defect density at the interface between the electron transport layer and the perovskite surface. By improving energy level alignment, this approach enhances both the photoelectric conversion efficiency and the durability of the solar cells under damp-heat and light soaking conditions.
The researchers demonstrated that this advancement significantly reduces defects, leading to improved performance and reliability. This development marks a crucial step in overcoming fundamental limitations of perovskite solar cells, offering practical solutions for more reliable optoelectronic devices.
Publication in Nature Synthesis
The collaborative research between HKUST and PolyU has led to a significant advancement in perovskite solar cell technology. Their work focuses on addressing interface defects in inverted devices through a novel three-ply laminated structure, which includes a molecular passivation layer, a fullerene derivative layer, and a 2D perovskite layer. This innovative approach effectively reduces defect density at the interface between the electron transport layer and the perovskite surface.
The laminated structure enhances energy level alignment, leading to improved photoelectric conversion efficiency and durability under challenging conditions such as damp heat and prolonged light exposure. This development marks a crucial step in overcoming fundamental limitations of perovskite solar cells, offering practical solutions for more reliable optoelectronic devices.
Published in Nature Synthesis, this research underscores the importance of precise structural engineering in advancing perovskite technology. The interdisciplinary collaboration highlights how cross-institutional expertise can lead to impactful advancements, setting a foundation for future innovations in the field.
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