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

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 FAPbI3 perovskite in humidity environments.

Dependencies are inferred from the claim text.