A buried base modification material for a flexible perovskite solar cell and a preparation method and application thereof

By introducing a mercapto-containing polymer substrate modification material into flexible perovskite solar cells, the problems of perovskite film cracking and interface delamination were solved, thereby improving the photoelectric efficiency and mechanical stability of flexible perovskite solar cells.

CN119264302BActive Publication Date: 2026-02-13NORTHWESTERN POLYTECHNICAL UNIV
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Patent Information

Application Number
CN202411376098.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-09-29
Publication Date
2026-02-13
Estimated Expiration
2044-09-29

AI Technical Summary

Technical Problem

Flexible perovskite solar cells are susceptible to stress from tension, shearing, and bending during service, which can lead to cracking of the perovskite film and interface detachment. Furthermore, the brittleness of the hole transport material and insufficient interfacial bonding can affect photoelectric efficiency and mechanical stability.

Method used

A thiol-containing polymer is used as the buried substrate modification material. The polymer buried substrate modification material is generated through a cross-linking reaction, which enhances the interfacial bonding force between the hole transport layer and the perovskite layer, passivates interfacial defects, and improves the efficiency and mechanical stability of flexible perovskite solar cells.

Benefits of technology

By introducing a thiol-containing polymer substrate modification material, interlayer stress was reduced, interfacial bonding was enhanced, and the photoelectric performance and mechanical durability of flexible perovskite solar cells were improved.

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Abstract

The present application relates to the technical field of solar cells, in particular to a buried bottom modification material for flexible perovskite solar cells and a preparation method and application thereof, wherein polyacrylic acid and its derivatives and mercaptoethylamine or its analogues are used as main reaction raw materials, a buried bottom modification material containing mercapto is generated through cross-linking reaction, the buried bottom modification material is spin-coated on a hole transport layer to prepare a buried bottom interface layer, and a flexible perovskite solar cell containing the buried bottom interface layer is prepared based on the buried bottom interface layer. The present application uses the above-mentioned buried bottom modification material for flexible perovskite solar cells and a preparation method and application thereof, and uses the polymer containing mercapto as the buried bottom modification material in the transverse flexible perovskite solar cell, so that the efficiency and mechanical stability of the flexible perovskite solar cell are improved.
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