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Encapsulation-Driven Stability in Perovskite Solar Cells: Suppressing Degradation through Hermetic Sealing
Yi Yang1, Xin Song1, Hong Liu1
1Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of New Energy and Electrical Engineering, Hubei University, Wuhan 430062, China.
ACS Applied Materials & Interfaces
|June 2, 2025
Summary
Hermetic encapsulation prevents perovskite solar cell degradation by suppressing a novel decomposition-nucleation-regrowth pathway. This stabilization method is key for durable perovskite photovoltaics.
Area of Science:
- Materials Science
- Renewable Energy
- Photovoltaics
Background:
- Perovskite solar cells (PSCs) show high efficiency and low cost.
- Long-term stability is a critical barrier for PSC commercialization.
Purpose of the Study:
- To investigate an unexpected degradation pathway in perovskite films.
- To evaluate the role of hermetic encapsulation in enhancing PSC stability.
Main Methods:
- Studied degradation in non-hermetic encapsulated perovskite films under illumination.
- Analyzed the effect of hermetic encapsulation on film morphology and ion migration.
- Assessed the impact of encapsulation on thermal, moisture, and photostability.
Main Results:
- Identified a decomposition-nucleation-regrowth process causing "coral-like" morphology and performance loss in non-hermetic PSCs.
- Hermetic encapsulation effectively suppressed this degradation pathway.
- Hermetic encapsulation stabilized ion migration and prevented perovskite crystal reconstruction.
- Enhanced thermal, moisture, and photostability significantly extended operational lifetimes.
Conclusions:
- Encapsulation acts as an active stabilizer for perovskite solar cells.
- Hermetic encapsulation is crucial for bridging the gap between lab efficiency and commercial viability.
- This work paves the way for durable and reliable perovskite photovoltaic technology.
