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Method for inkjet printing an organic-inorganic perovskite

專利號
US11177440B2
公開日期
2021-11-16
申請人
AALTO UNIVERSITY FOUNDATION; ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL); SOLARONIX S.A.（FI Helsinki CH Ecublens CH Aubonne）
發(fā)明人
Syed Ghufran Hashmi; Merve Ozkan; David Martineau; Xiong Li; Shaik Mohammed Zakeeruddin; Michael Graetzel
IPC分類
H01L51/42; H01L51/00
技術(shù)領(lǐng)域
perovskite,solar,precursor,in,ink,printing,cation,preferably,said,inkjet
地域： Helsinki

摘要

The present invention provides a method for depositing an organic-inorganic perovskite, the method comprising the step of depositing a perovskite precursor solution comprising one or more organic cation, wherein said precursor solution preferably deposited by inkjet printing. The method is particularly useful in the manufacture of perovskite solar cells. For depositing the perovskite, a perovskite precursor solution or ink is preferably used, which comprises an organic cation carrying an anchoring group, such as 5-ammonium valeric acid. Surprisingly, the presence of the latter compound renders the precursor solutions stable and suitable for inkjet printing.

說明書

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and salts of said cations (1)-(3),
wherein n is an integer of 1-10, preferably 2-7, most preferably 3-6.

In an embodiment, said “precipitation retarding compound” is an organic cation that is added to or present in said precursor solution in the form of a salt comprising at least one anion. In an embodiment, said anion is independently selected from the group consisting of: halide anions, CN?, NCO?, NCS?, NCSe? and BF4?. Preferred halides are I?, Cl?, Br? and F?.

In an embodiment, said “precipitation retarding compound” is selected from ammonium carboxylic acid halides with variable alkyl chains or moieties, for example separating the ammonium from the carboxylic acid group. For example, the alkyl chain may be as n defined with respect to formulae (1)-(3).

In an embodiment, the “precipitation retarding compound” is selected from 5-ammonium valeric acid (5-AVA), 5-aminopentanamide (5-APAC), 4-aminobutylphosphonic acid (4-ABPAC).

In some embodiments, said “precipitation retarding compound” is selected from an amino acid, an amino acid hydrohalide, a formamidinium halide, and an imidazolium halide.

權(quán)利要求

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