High-efficiency transverse perovskite solar cell and preparation method thereof

By leveraging the synergistic effect of polymer macromolecules and small molecule materials, bulk and interface defects in perovskite solar cells are passivated, solving the problem of nonradiative recombination of charge carriers in perovskite solar cells and improving photoelectric conversion efficiency and stability.

CN119907603BActive Publication Date: 2026-04-07SHENZHEN MSU-BIT UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-01-20
Publication Date
2026-04-07

AI Technical Summary

Technical Problem

In existing perovskite solar cells, the bulk and surface defects of perovskite are difficult to passivate effectively, leading to nonradiative recombination of charge carriers and insufficient device stability, which affects photoelectric conversion efficiency.

Method used

Chemical passivation using polymer macromolecular materials, combined with field passivation using small molecule materials, regulates perovskite crystallization, suppresses nonradiative recombination of charge carriers, and achieves effective passivation of the perovskite bulk phase and interface.

Benefits of technology

It significantly improves the photoelectric conversion efficiency and long-term stability of perovskite solar cells, and achieves synergistic passivation of multiple defects in the perovskite bulk phase and surface through simple operation and low cost.

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Abstract

This invention relates to the field of perovskite solar cell technology, specifically to a high-efficiency inverted perovskite solar cell and its fabrication method. The fabrication method includes the following steps: spin-coating a self-assembled monomolecule solution onto a first region on the surface of a conductive substrate, followed by annealing to form a hole transport layer; spin-coating a perovskite precursor solution onto the surface of the hole transport layer; during spin-coating, adding a chemical passivation solution to the coated surface and annealing; spin-coating a field passivator solution onto the annealed perovskite film surface, followed by annealing to form a perovskite active layer; spin-coating a mixed solution of fullerene and fullerene derivatives onto the surface of the perovskite active layer, followed by spin-coating an organic small molecule solution to form an electron transport layer; and fabricating electrodes on the electron transport layer and a second region on the surface of the conductive substrate; the chemical passivation solution is a polymer macromolecular material solution, and the field passivator solution is a small molecule material solution. The high-efficiency inverted perovskite solar cell of this invention significantly improves photoelectric conversion efficiency.
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Citation Information

Patent Citations

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  • Inverse perovskite solar cell and preparation method thereof

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