Method for improving water and oxygen stability of perovskite solar cells by in-situ polymerization encapsulation technology

By preparing a poly(ethyl α-cyanoacrylate) encapsulation layer at the grain boundaries and interfaces of perovskite solar cells, the problem of perovskite solar cells being susceptible to water and oxygen corrosion was solved, achieving high water and oxygen stability and improved photoelectric conversion efficiency.

CN119730650BActive Publication Date: 2026-07-10FUZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
FUZHOU UNIV
Filing Date
2024-12-31
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Perovskite solar cells are susceptible to water and oxygen corrosion, leading to rapid decomposition. Existing encapsulation technologies increase the complexity and cost of the manufacturing process and lack compatible internal encapsulation technologies.

Method used

In-situ polymerization of poly(ethyl α-cyanoacrylate) encapsulation layer was carried out at the bulk grain boundaries and interfaces of the perovskite light-absorbing layer to form an encapsulation layer with a thickness of 3-10 nm, which blocked water and oxygen and passivated defect sites.

Benefits of technology

It significantly improves the water and oxygen stability and photoelectric conversion efficiency of perovskite solar cells. The encapsulation layer retains 90% of its initial efficiency after being stored in humid air for 1600 hours, without affecting carrier transport.

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Abstract

The application discloses a method for improving water and oxygen stability of a perovskite solar cell and belongs to the technical field of perovskite solar cell preparation. The technical scheme is that monomer ethyl alpha-cyanoacrylate (ECA) is introduced at perovskite grain boundaries and interfaces of the perovskite solar cell, and polymerization is completed under the triggering of water molecules to form a poly (alpha-cyanoacrylate) (PECA) encapsulation layer with a certain thickness. The PECA encapsulation layer blocks the erosion of environmental water and oxygen to the perovskite crystal while not blocking the transmission and collection of carriers, and has a certain defect passivation effect, so that the water and oxygen stability is improved. The PECA encapsulation is a simple and feasible method for efficiently improving the water and oxygen stability of the perovskite solar cell, and has wide popularization and application prospects.
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