A method for preparing efficient perovskite solar cells by using an ammonium salt modified SnO2 electron transport layer

CN114284437BActive Publication Date: 2025-07-29DALIAN UNIV OF TECH
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Patent Information

Application Number
CN202210007193.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-01-05
Publication Date
2025-07-29
Estimated Expiration
2042-01-05

AI Technical Summary

Technical Problem

In perovskite solar cells, there are poor contact and defects in the interface between the electron transport layer and the perovskite layer, resulting in poor device performance and stability problems.

Method used

The organic ammonium salt dimethylaminopropylamine hydroiodate (DMAPAI2) is added to the SnO2 electron transport layer to optimize the interface and improve the crystallization of the perovskite film to form a high-quality perovskite film with large grain size.

Benefits of technology

It improves the electrical performance of the electron transport layer, promotes the increase of perovskite grains, and improves the photoelectric conversion efficiency of perovskite solar cells.

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Abstract

The present invention belongs to the technical field of perovskite solar cells. A method for preparing an efficient perovskite solar cell by using an ammonium salt-modified SnO₂ electron transport layer, and a perovskite solar cell device structure, which from bottom to top are a conductive glass substrate, an electron transport layer, a perovskite layer, a hole transport layer and a metal electrode in sequence. Compared with the traditional SnO₂ electron transport layer, adding the ammonium salt dimethylaminopropylamine hydroiodide (DMAPAI₂) to SnO₂ can effectively improve the interface between the electron transport layer and the perovskite. It can not only effectively improve the electrical properties of the electron transport layer, but also simultaneously affect the crystallization process of the upper perovskite, making the grain size of the perovskite increase. Based on the DMAPAI₂-modified SnO₂ as the electron transport layer, a perovskite solar cell with high photoelectric conversion efficiency is prepared.
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Citation Information

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