The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 12707875 B1

Date of Patent:

Aug. 11, 2026

Filed:

May. 27, 2025

Method for synthesizing perovskite precursor solution of formamidine-based ionic liquid, celldevice, and solar cell

Applicant:

Nanjing Tech University, Nanjing, CN;

Inventors:

Yonghua Chen, Nanjing, CN;

Lingfeng Chao, Nanjing, CN;

Yuqian Xie, Nanjing, CN;

Yingdong Xia, Nanjing, CN;

Wei Huang, Nanjing, CN;

Assignee:

NANJING TECH UNIVERSITY, Nanjing, CN;

Attorney:

HOWARD M COHN and Associates, LLC

Primary Examiner:

Michael G Miller

Int. Cl.

CPC ...

H10K 71/12 (2023.01); H10K 30/50 (2023.01); H10K 71/40 (2023.01); H10K 85/50 (2023.01);

U.S. Cl.

CPC ...

H10K 71/12 (2023.02); H10K 30/50 (2023.02); H10K 71/40 (2023.02); H10K 85/50 (2023.02);

Abstract

Disclosed are a method for synthesizing a perovskite precursor solution of a formamidine-based ionic liquid, a cell device, and a solar cell. The method includes: adding an organic sodium salt and formamidine hydrochloride to ethanol, respectively, stirring to obtain a formamidine hydrochloride solution and a sodium alkyl carboxylate solution; dropwise adding the formamidine hydrochloride solution to the sodium alkyl carboxylate solution, stirring the mixed solution; filtering the reacted mixed solution and extracting a filtrate, performing rotary evaporation to remove ethanol, and performing oscillating washing; performing secondary filtration, extracting a filtrate, and performing rotary evaporation to remove the organic solvent, to obtain an organic acid formamidine ionic liquid; and dissolving lead iodide and formamidine hydriodide into the organic acid formamidine ionic liquid for reaction to obtain the perovskite precursor solution of the formamidine-based ionic liquid. The method solves the problem of poor phase stability of FAPbIperovskite in humidity environments.

Find Patent Forward Citations

Chen, Yonghua. (2026). Method for synthesizing perovskite precursor solution of formamidine-based ionic liquid, celldevice, and solar cell (U.S. Patent No. 12707875). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12707875

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