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Multifunctional Polymer Matrix at the Buried Interface Boosting Stability and Efficiency in Perovskite Solar Cells
Huiming Luo1, Zhijie Gao2,3, Himal Muwanwella4
1Institute for Materials Discovery, University College London, Malet Place, London, WC1E 7JE, UK.
Small (Weinheim an Der Bergstrasse, Germany)
|September 27, 2025
Summary
Sodium hyaluronate improves tin oxide (SnO2) films for perovskite solar cells. This enhances device efficiency to 25.11% and boosts long-term operational stability.
Area of Science:
- Materials Science
- Renewable Energy
- Nanotechnology
Background:
- Optimizing buried interfaces is crucial for perovskite solar cell performance.
- Interfaces affect carrier dynamics and perovskite film quality.
Purpose of the Study:
- To enhance perovskite solar cell efficiency and stability.
- To explore sodium hyaluronate as a modifier for SnO2 electron transport layers.
Main Methods:
- Using sodium hyaluronate to disperse SnO2 nanoparticles.
- Creating uniform and compact SnO2 films.
- Characterizing interface properties and device performance.
Main Results:
- Achieved a champion power conversion efficiency of 25.11%.
- Demonstrated negligible hysteresis and improved device stability (90% after 1000h).
- Eliminated oxygen vacancies and hydroxyl bonds at the SnO2/perovskite interface.
Conclusions:
- Sodium hyaluronate effectively passivates the SnO2/perovskite interface.
- This strategy enhances perovskite solar cell efficiency and intrinsic stability.
- The approach shows promise for commercializing perovskite solar cells.
