Trans-perovskite solar cell, preparation method of trans-perovskite solar cell, perovskite film composition, crystal solvate, electrical equipment and application of trans-perovskite solar cell

By using low-dimensional halide crystallization solvents to synthesize crystals in inverted perovskite solar cells, the problem of uneven nucleation at the bottom interface of the perovskite film was solved, the microstructure and electronic properties were improved, the photoelectric conversion efficiency and stability were enhanced, and high-efficiency perovskite solar cell performance was achieved.

CN122270013APending Publication Date: 2026-06-23THE HONG KONG UNIV OF SCI & TECH +2
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Patent Information

Application Number
CN202411905653.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-23
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

In the prior art, the microstructure and electronic properties of the bottom interface of the perovskite film in inverted perovskite solar cells are difficult to effectively adjust, resulting in uneven nucleation and electronic defects at the interface, which affect the performance and stability of the device.

Method used

Low-dimensional halide crystallizing solvates are used to seed crystals on the substrate to form a crystallizing solvate crystal layer, which improves the wettability and crystallization process of the perovskite precursor solution, eliminates interfacial voids, regulates the bottom grain boundary structure, and releases solvent molecules through annealing to form a dense perovskite film.

Benefits of technology

The microstructure and electronic properties of the bottom of the perovskite film were significantly improved, resulting in higher photoelectric conversion efficiency, enhanced device stability and thermal stability, and the realization of high-efficiency perovskite solar cell performance.

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Abstract

The invention provides a trans-perovskite solar cell, a preparation method of the trans-perovskite solar cell, a perovskite film composition, a crystal solvate, electrical equipment and application of the trans-perovskite solar cell. The method comprises the steps that before a perovskite precursor solution is applied to a substrate, a crystal solvate is used for seed crystal on the substrate; the general formula of the crystal solvate is AxPbX4.yDMSO, A is selected from cations of the following substances: ethylenediamine, butanediamine, heptyl diamine, phenylethylamine, piperazine, N, N '-dimethylethylenediamine, N-methylethylenediamine, N, N, N', N '-tetramethylethylenediamine, N, N, N'-trimethyl lethylenediamine and N, N-dimethylethylenediamine; x is selected from I <->, Br <-> and Cl <->; x is 1-2; and y is 1-3. The PCE of the PSC reaches 26.13%, the FF of the PSC reaches 86.75%, 93% of the initial PCE is maintained after 1000h of maximum power point tracking, and 85% of the initial PCE is maintained after 900h of isothermal heating at 85 DEG C.
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