AI Article Synopsis
- Perovskite solar cells (PSCs) hold great potential for future energy technologies but pose environmental risks due to water-soluble lead (Pb) in their structure.
- When exposed to water, the structure of 3D perovskites deteriorates quickly, leading to increased lead leakage.
- By incorporating a stable 2D perovskite layer on the surface of 3D perovskites, the dissolution rate is slowed, significantly reducing lead contamination, while achieving a power conversion efficiency of 23.6% and maintaining over 95% efficiency after extended use.
Article Abstract
Perovskite solar cells (PSCs) have become a promising candidate for the next-generation photovoltaic technologies. As an essential element for high-efficiency PSCs however, the heavy metal Pb is soluble in water, causing a serious threat to the environment and human health. Due to the weak ionic bonding in three-dimensional (3D) perovskites, drastic structure decomposition occurs when immersing the perovskite film in water, which accelerates the Pb leakage. By introducing the chemically stable Dion-Jacobson (DJ) 2D perovskite at the 3D perovskite surface, the film dissolution is significantly slowed down, which retards lead leakage. As a result, the Pb contamination is dramatically reduced under various extreme conditions. In addition, the PSCs device deliver a power conversion efficiency (PCE) of 23.6 % and retain over 95 % of their initial PCE after the maximum power point tracking for over 1100 h.
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| http://dx.doi.org/10.1002/anie.202204314 | DOI Listing |
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