Perovskite solar cell, preparation method, photovoltaic system, power generation device, and electric device

By introducing a first passivation layer of reducing agent into perovskite solar cells, the nickel ions on the surface of the charge extraction layer are reduced to Ni2+, solving the degradation problem caused by the contact between nickel oxide and the perovskite layer and improving the stability and photoelectric conversion efficiency of the perovskite layer.

WO2025185485A1 Publication Date: 2025-09-11CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
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Patent Information

Application Number
PCT/CN2025/079053
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-03-08
Filing Date
2025-02-25
Publication Date
2025-09-11

AI Technical Summary

Technical Problem

When nickel ions with a valence of +3 or above contained in nickel oxide come into contact with the perovskite layer, they will cause a deprotonation reaction of the perovskite material, degrade the stability of the perovskite layer, and affect the life of the perovskite solar cell.

Method used

A first passivation layer and a reducing agent are introduced into the perovskite solar cell. By having a reduction potential of the reducing agent lower than that of Ni3+, the nickel ions with a valence of +3 or above on the surface of the charge extraction layer are reduced to Ni2+, thereby reducing their reaction with the perovskite material.

Benefits of technology

The stability of the perovskite layer is improved, the service life of the perovskite solar cell is extended, and the photoelectric conversion efficiency is improved through the second passivation layer.

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Abstract

The present application provides a perovskite solar cell, a preparation method, a photovoltaic system, a power generation device, and an electric device. The perovskite solar cell comprises a first electrode, a charge extraction layer, a first passivation layer, a perovskite layer, and a second electrode which are sequentially stacked. The material of the charge extraction layer comprises a nickel oxide, the material of the first passivation layer comprises a reducing agent, and the reduction potential of the reducing agent is less than that of Ni3+. In the perovskite solar cell, by means of introduction of the first passivation layer, nickel ions with a valence of +3 or higher in the charge extraction layer can be reduced, reducing the degradation of a perovskite material, improving the stability of the perovskite layer, thereby prolonging the service life of the perovskite solar cell.
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