Compositions and methods for stabilizing perovskite interfaces

Patent metadata

Field	Value
Publication number	US-11765964-B2
Application number	US-202117388235-A
Country	US
Kind code	B2
Filing date	Jul 29, 2021
Priority date	Jul 31, 2020
Publication date	Sep 19, 2023
Grant date	Sep 19, 2023

Abstract

The present disclosure relates to a composition that includes a first layer that includes a perovskite defined by ABX 3 and a second layer that includes a perovskite-like material defined by at least one of A′ 2 B′X′ 4 , A′ 3 B′ 2 X′ 9 , A′B′X′ 4 , A′ 2 B′X′ 6 , and/or A′ 2 AB′ 2 X′ 7 , where the first layer is adjacent to the second layer, A is a first cation, B is a second cation, X is a first anion, A′ is a third cation, B′ is a fourth cation, X′ is a second anion, and A′ is different than A.

First claim

What is claimed is:

1. A composition comprising:
a first layer comprising a perovskite defined by ABX 3 ; and
a second layer comprising a perovskite-like material defined by at least one of A′ 2 B′X′ 4 , A′ 3 B′ 2 X′ 9 , A′B′X′ 4 , A′ 2 B′X′ 6 , or A′ 2 AB′ 2 X′ 7 , wherein:
the first layer is adjacent to the second layer,
A is a first cation, B is a second cation, X is a first anion,
A′ is a third cation, B′ is a fourth cation, X′ is a second anion, and
A′ is different than A.

2. The composition of claim 1 , wherein A′ comprises an ammonium functional group.

3. The composition of claim 2 , wherein A′ comprises at least one of butylammonium (BA), phenylethylammonium (PEA), 4-flouorophenethylammonium (F-PEA), N-methyl-1,3-propane diammonium (ME-PDA), 1,4-butane diammonium (BDA), or N,N-dimethyl-1,3-propane diammonium (DMePDA), dipropylammonium, or diethylammonium.

4. The composition of claim 1 , wherein the second layer has a thickness between about 1 nm and about 1 μm.

5. The composition of claim 4 , wherein the thickness is between about 10 nm and about 100 nm.

6. The composition of claim 1 , wherein the first layer has a thickness between about 200 nm and about 1000 nm.

7. The composition of claim 1 , wherein X comprises a halide.

8. The composition of claim 7 , wherein X comprises at least one of iodide, bromide, or chloride.

9. The composition of claim 1 , wherein B comprises at least one of tin or lead.

10. The composition of claim 1 , wherein A comprises at least one of methylammonium (MA), formamidinium (FA), dimethylammonium, or cesium.

11. The composition of claim 10 , wherein the perovskite comprises FA (1-x-y) MA x Cs y PbI (3-z) Br z .

12. The composition of claim 1 , wherein X′ comprises a halide.

13. The composition of claim 12 , wherein X′ comprises at least one of iodide, bromide, or chloride.

14. The composition of claim 1 , wherein B′ comprises at least one of tin or lead.

15. The composition of claim 1 , wherein the perovskite-like material comprises BA 2 (MA x FA 1-x )Pb 2 (I 1-y Br y ) 7 .

16. The composition of claim 1 , wherein the perovskite-like material comprises at least one of BA 2 PbI 4 , BA 2 PbBr 4 , BA 2 MAPb 2 I 7 , BA 2 FAPb 2 I 7 , BA 2 MAPb 2 Br 7 , or BA 2 FAPb 2 Br 7 .

17. A device comprising:
a first layer comprising:
a perovskite;
a surface that is substantially planar;
the surface comprises a cut into the surface; and
the cut penetrates the surface and the first layer and comprises a width, a depth, a length, and an internal surface;

a second layer comprising a perovskite-like material, wherein:
the second layer covers at least a portion of the internal surface.

18. A method comprising:
depositing a second layer onto a first layer, wherein:
the first layer comprises a perovskite,
the second layer comprises a perovskite-like layer, and
the depositing is performed using at least one of a solution method or a vapor-phase method.

19. The method of claim 18 , wherein the depositing is performed using the vapor-phase method while simultaneously heating at least a portion of the first layer.

20. The method of claim 19 , wherein the depositing is performed using an atomic layer deposition (ALD) technique.

Assignees

• Alliance Sustainable Energy

Inventors

• Palmstrom Axel Finn
• Zhu Kai
• Zhang Fei
• Berry Joseph Jonathan

Classifications

• H10K85/50

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

• H10K39/12

  Electrical configurations of PV cells, e.g. series connections or parallel connections · CPC title

• H10K30/10

  comprising heterojunctions between organic semiconductors and inorganic semiconductors · CPC title

• H10K30/50

  Photovoltaic [PV] devices · CPC title

• H10K85/30 Primary

  Coordination compounds · CPC title