Methods for stabilizing perovskites

Patent metadata

Field	Value
Publication number	US-11753422-B2
Application number	US-202117406275-A
Country	US
Kind code	B2
Filing date	Aug 19, 2021
Priority date	Aug 19, 2020
Publication date	Sep 12, 2023
Grant date	Sep 12, 2023

Abstract

The present disclosure relates to a composition that includes a material of at least one of a perovskite structure, a perovskite-like structure, and/or a perovskitoid structure, where the material includes an isotope of an element, the isotope has more neutrons than protons, and the isotope is incorporated into the perovskite structure, the perovskite-like structure, and/or the perovskitoid structure. In some embodiments of the present disclosure, the isotope may make up between greater than 0% and 100% of the element.

First claim

What is claimed is:

1. A composition comprising:
at least one of a perovskite material or a perovskite-like material having a structure comprising a first cation (A), a second cation (B), and an anion (X), wherein:
the first cation comprises at least one of formamidinium (FA), ethylammonium, propylammonium, butylammonium, hydrazinium, acetylammonium, dimethylammonium, imidazolium, guanidinium, benzylammonium, or phenethylammonium, and
at least a first portion of the first cation is deuterated.

2. The composition of claim 1 , wherein the first portion includes deuterated FA.

3. The composition of claim 2 , wherein a second portion of the first cation includes at least one of carbon-13 or nitrogen-15.

4. The composition of claim 1 , wherein
the structure comprises at least one of ABX 3 , A 2 BX 6 , A 2 BX 4 , ABX 4 , or A 3 B 2 X 9 .

5. The composition of claim 2 , wherein:
the first cation comprises FA and methylammonium (MA),
the second cation comprises at least one of lead or tin,
the anion comprises a halide, and
the MA is not deuterated.

6. The composition of claim 5 , wherein the perovskite further comprises an inorganic A-cation.

7. The composition of claim 6 , wherein the inorganic A-cation comprises cesium.

8. The composition of claim 7 , wherein:
the structure comprises Cs (1-x-y) FA x MA y Pb (1-a) Sn a I (3-z) Br, x+y≠1.0 ≤x≤1.0≤y≤1.0≤a≤1, and 0≤z≤3.

9. The composition of claim 8 , wherein the structure is at least one of Cs 0.05 FA 0.8 MA 0.15 PbI 2.55 Br 0.45 or Cs 0.25 FA 0.75 Sn 0.5 Pb 0.5 I 3 .

10. A method comprising:
synthesizing a precursor comprising a deuterated cation;
preparing a solution comprising the precursor;
depositing the solution onto a surface to form a liquid film of the solution on the surface; and
treating the film, wherein:
the treating converts the liquid film to a material comprising at least one of a perovskite material or a perovskite-like material having a structure comprising a first cation (A), a second cation (B), and an anion (X), and
the deuterated cation comprises at least one of formamidinium (FA), ethylammonium, propylammonium, butylammonium, hydrazinium, acetylammonium, dimethylammonium, imidazolium, guanidinium, benzylammonium, or phenethylammonium.

11. The composition of claim 5 , wherein the structure is FA 0.6 MA 0.4 Pb 0.4 Sn 0.6 I 3 .

12. The composition of claim 2 , wherein the deuterated first cation comprises at least one of D 2 NCH═ND 2 + , DHNCH═ND 2 + , H 2 NCH═ND 2 + , H 2 NCH═NDH + , or DHNCH═NDH +.

Assignees

• Alliance Sustainable Energy
• Univ Northern Illinois Board Of Trustees

Inventors

• Zhu Kai
• Tong Jinhui
• Xu Tao
• Li Xun

Classifications

• H10K85/50

  Organic perovskites; Hybrid organic-inorganic perovskites [HOIP], e.g. CH3NH3PbI3 · CPC title

• H10K30/50

  Photovoltaic [PV] devices · CPC title

• H10K30/20

  comprising organic-organic junctions, e.g. donor-acceptor junctions · CPC title

• H10K85/30

  Coordination compounds · CPC title

• C01B4/00

  Hydrogen isotopes; Inorganic compounds thereof prepared by isotope exchange, e.g. NH3 + D2 → NH2D + HD · CPC title