Verfahren zum Steuern des Kristallisationsprozesses zur Erzeugung der Schwarzen Phase (alpha-Phase) von Perowskiten auf FAPBI3-Basis

Details

Veröffentlichungs-Nr.

EP4290595

Aktenzeichen

EP22178276

Anmeldetag

10. Juni 2022

Veröffentlichung

13. Dezember 2023

Rechtsraum

EP

IPC

H01L51/00H01L51/42

Abstract

The present invention relates to a method for preparing an α-phase FAPbI<3>-based perovskite film, wherein FA is formamidinium [CH(NH<2>)<2>]<+>, comprising the following steps: (1) preparing a perovskite precursor solution containing (a) perovskite precursors FAI and PbI<2> with a mole ratio FA:Pb of more than 0.85, and preferably from 0.90 to 1.00, and (b) an ionic liquid of formula AB, wherein A is a cationic imidazole derivative in which at least one of the two nitrogen atoms in the imidazole ring is linked to a carbon chain bearing a cyano (-C≡N) group and B is an anion; (2) spin coating the perovskite precursor solution onto a substrate in an inert atmosphere to prepare a spin coated film; (3) vacuum drying the spin coated film to form a fresh perovskite film; and (4) annealing the fresh perovskite film to form the α-phase FAPbI<3>-based perovskite film.

Anmelder

Firma

TOYOTA JIDOSHA KABUSHIKI KAISHA

Land

🇯🇵 Japan

Fachgebiete