Method for regulating crystal face growth in perovskite crystallization process and application thereof in preparation of solar cells

By doping formamidine hydrochloride into the perovskite precursor solution to generate active guanidine FA-Gua, the problems of poor crystallinity and stability of perovskite solar cells are solved. Selective growth of perovskite crystals along the (001) crystal plane is achieved, which improves the crystal quality and stability of the film and enhances the photoelectric performance.

CN119546147BActive Publication Date: 2026-05-29SHANDONG UNIV
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Patent Information

Application Number
CN202411596341.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-11-11
Publication Date
2026-05-29
Estimated Expiration
2044-11-11

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Abstract

The application belongs to the technical field of perovskite solar cells, and particularly relates to a method for regulating crystal face growth in a perovskite crystallization process and application thereof in preparation of solar cells. Chloroformamidine hydrochloride (ClFACl) is doped into a perovskite precursor solution, so that the crystal face growth in the perovskite crystallization process is regulated. The final concentration of chloroformamidine hydrochloride in the perovskite precursor solution is 0.3-3.5 mg / ml. The application uses chloroformamidine hydrochloride as a crystal face regulator of the perovskite precursor solution, regulates the perovskite crystal face selectivity through an in-situ nucleophilic substitution reaction, induces the perovskite crystal to selectively grow along the (001) crystal face, improves the perovskite thin film crystallization quality, reduces the thin film defects, and suppresses the non-radiative recombination. The application makes the precursor solution nucleation homogeneous by introducing ClFACl, suppresses the generation of impurity phases, promotes the conversion of intermediate phases to alpha phases, and finally improves the photoelectric performance and stability of the device.
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