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Stable and Lead‐Safe Polyphenol‐Encapsulated Perovskite Solar Cells
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Stable and Lead‐Safe Polyphenol‐Encapsulated Perovskite Solar Cells
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Journal Article
Stable and Lead‐Safe Polyphenol‐Encapsulated Perovskite Solar Cells
2024
Overview
Lead (Pb) halide perovskite solar cells (PSCs) exhibit impressive power conversion efficiencies close to those of their silicon counterparts. However, they suffer from moisture instability and Pb safety concerns. Previous studies have endeavoured to address these issues independently, yielding minimal advancements. Here, a general nanoencapsulation platform using natural polyphenols is reported for Pb‐halide PSCs that simultaneously addresses both challenges. The polyphenol‐based encapsulant is solution‐processable, inexpensive (≈1.6 USD m−2), and requires only 5 min for the entire process, highlighting its potential scalability. The encapsulated devices with a power conversion efficiency of 20.7% retained up to 80% of their peak performance for 2000 h and up to 70% for 7000 h. Under simulated rainfall conditions, the encapsulant rich in catechol groups captures the Pb ions released from the degraded perovskites via coordination, keeping the Pb levels within the safe drinking water threshold of 15 ppb.
A natural polyphenol‐based nanoencapsulation coating is developed for lead halide perovskite solar cells (PSCs). The encapsulant is low‐cost, scalable, and offers a single, comprehensive solution for enhancing cell stability and safety. The encapsulant effectively stabilizes PSCs in ambient conditions while also safeguarding against lead contamination under severe conditions.
Publisher
John Wiley & Sons, Inc,John Wiley and Sons Inc,Wiley
