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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

M is a divalent metal cation as defined above;
D, A1, A2, A3 are organic cations as defined above, preferably monovalent cations,
X1, X2, X3, X4, X5 are anions as defined above, preferably monovalent anions, which may be the same or different,
O>0, P>0, Q≥0, R Q≥0, and
O+P+Q+R≥1, preferably >1.

Accordingly, X1 and X2, may be different anions, for example different halide anions, or may be the same anion, for example the same halide anion.

More preferably, 2>O+P+Q+R≥1, even more preferably 1.5>O+P+Q+R.

Preferably, 1.2≥O+P+Q+R≥1, even more preferably 1.1>O+P+Q+R≥1.

In a preferred embodiment, 1.08≥O+P+Q+R≥1. In a practical embodiment, O+P+Q+R=1.05 (5% percent excess of organic cations compared to M).

In an embodiment, R=0, such that there are not more than 3 different organic cations. Even more preferably, Q=R=0, such that there are not more than 2 different organic cations. p The preferred amounts of the sums apply also to this embodiment (2>, 1.5≥, 1.2≥, 1.1≥).

In a preferred embodiment, P+Q+R=1, 1>O>0, P>0, Q≥0, R≥0. Accordingly, A2, A3 may be absent, and D is added in excess, because P+Q+R=1.

Preferably, A1 =methyl ammonium.

Accordingly, M on the one side and A1, A2, A3, together, on the other side (and in as far as present) may be present at a 1:1 ratio, with D, the retarding organic cation being added in excess. If A2, A3 are absent, in accordance with a preferred embodiment, then A1 and M are present in a 1:1 ratio and D is added in excess.

權(quán)利要求

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