Perovskite cell and preparation method thereof, laminated solar cell and photovoltaic module

By pretreating the surface of the framework layer with isobutylammonium iodide solution, the wettability and permeability of the organic ammonium salt solution are improved, the problem of excessive crystallinity of the framework layer is solved, and high-efficiency photoelectric conversion of perovskite solar cells is achieved.

CN122138598APending Publication Date: 2026-06-02TONGWEI SOLAR ENERGY (CHENGDU) CO LID
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Patent Information

Application Number
CN202610352163.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-20
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

In the existing two-step solution method for preparing perovskite layers, the excessive crystallinity of the framework layer makes it difficult for organic salt solutions to penetrate and react. The remaining unreacted framework layer material becomes charge recombination centers, which impairs device performance.

Method used

The surface of the framework layer was pretreated with isobutylammonium iodide solution. The wettability and permeability of the organic ammonium salt solution were improved by the first annealing, and the crystallization kinetics were controlled to form a uniform perovskite layer.

Benefits of technology

It improves the uniformity and crystallinity of the perovskite layer, reduces the residue of unreacted framework layer, and enhances the photoelectric conversion efficiency of perovskite solar cells.

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Abstract

The invention discloses a perovskite cell and a preparation method thereof, a laminated solar cell and a photovoltaic module, and relates to the field of photovoltaic technology. According to the preparation method of the perovskite cell provided by the invention, the skeleton layer is coated with the isobutylammonium iodide solution and annealing is carried out, and organic cations in the isobutylammonium iodide solution can stay on the surface and grain boundary of the skeleton layer, so that the functions of a surfactant and a passivator are achieved, phase change is not generated too early, and the performance of the perovskite cell is improved. Wherein the isobutylammonium iodide can improve the wettability of the surface of the skeleton layer to a subsequent organic ammonium salt solution, so that the uniform spreading and permeation of the organic ammonium salt solution are ensured, and ideal conditions are created for homogeneous nucleation and growth. And isobutylammonium iodide is utilized to regulate crystallization kinetics, passivate defects and expand a nucleation window, so that unreacted skeleton layer residues can be reduced, and the purpose of improving the performance of the perovskite layer and the perovskite cell is achieved.
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