Two-dimensional perovskite compositions and devices therefrom

Patent metadata

Field	Value
Publication number	US-11964994-B2
Application number	US-202017109668-A
Country	US
Kind code	B2
Filing date	Dec 2, 2020
Priority date	Dec 2, 2019
Publication date	Apr 23, 2024
Grant date	Apr 23, 2024

Abstract

The present disclosure relates to a composition that includes a perovskite of A 2 BX 4 , where A includes an R-form of a chiral molecule of at least one of

and/or an S-form of the chiral molecule, B includes a cation, X includes an anion, R 1 includes a first carbon chain having between 2 and 5 carbon atoms, R 2 includes at least one of a hydrogen atom, a halogen atom, a carboxylic acid group, an alkoxy group, and/or a second carbon chain, and R 3 includes a third carbon chain.

First claim

What is claimed is:

1. A composition comprising:
a perovskite comprising A 2 BX 4 , wherein:
A comprises an R-form of a chiral molecule comprising at least one of

or an S-form of the chiral molecule,
B comprises a cation, and
X comprises an anion.

2. The composition of claim 1 , wherein the composition demonstrates spin-polarization of charge transport when a current is injected into the composition.

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

4. The composition of claim 1 , wherein X comprises a halogen.

5. The composition of claim 1 , wherein the perovskite comprises at least one of R-A 2 PbI 4 , S-A 2 PbI 4 , R-A 2 SnI 4 , S-A 2 SnI 4 , R-A 2 Pb 1-x Sn x I 4 , S-A 2 Pb 1-x Sn x I 4 , wherein 0<x<1.

6. The composition of claim 1 , wherein:
the perovskite is in a form comprising a first two-dimensional (2D) network and a second 2D network,
the first 2D network comprises BX 4 ,
the second 2D network comprises BX 4 , and
a plurality of the chiral molecule forms a layer positioned between the first 2D network and the second 2D network.

7. The composition of claim 1 , wherein the perovskite is in a shape of a film having a thickness between about 10 nm and about 100 nm.

8. The composition of claim 7 , wherein the film has a roughness between about 1 nm and about 5 nm.

9. The composition of claim 1 , wherein the perovskite has a bandgap between about 2.2 eV and about 3.0 eV.

10. The composition of claim 1 , wherein the perovskite is capable of demonstrating chiral induced spin selectivity.

11. The composition of claim 8 , wherein the film of the perovskite is polycrystalline.

12. A device comprising:
a ferromagnetic (FM) electrode;
a non-FM electrode; and
a perovskite film comprising A 2 BX 4 , wherein:
the perovskite film is positioned between the FM electrode and the non-FM electrode,
A comprises an R-form of a chiral molecule comprising at least one of

or an S-form of the chiral molecule,
B comprises a cation, and
X comprises an anion.

13. The device of claim 12 configured to operate as at least one of an FM electrode, a spin filter, a spin polarized LED, a spin polarized laser, an op spin-valve, a spin-diode, a spin-transistor, a chiral-light detector, a switchable optical memory, a polarization selective optical multiplexor, or an ultrafast modulator.

14. The device of claim 12 , wherein the non-FM electrode comprises a transparent conducting oxide (TCO).

15. The device of claim 14 , wherein the TCO comprises indium tin oxide.

16. The device of claim 12 , wherein the FM electrode comprises nickel and iron.

17. The device of claim 16 , wherein the FM electrode has a thickness between about 1 nm and about 10 nm.

18. The device of claim 12 , further comprising:
a metal layer, wherein:
the FM electrode is positioned between the metal layer and the perovskite film.

19. The device of claim 18 , wherein the metal layer is a gold layer.

20. The device of claim 12 , wherein the perovskite film demonstrates spin-polarization of charge transport when a current is injected into the perovskite film.

Assignees

• Alliance Sustainable Energy
• Univ Utah Res Found
• Univ Duke

Inventors

• Beard Matthew C
• Lu Haipeng
• Maughan Annalise Elizabeth
• Berry Joseph Jonathan
• Vardeny Zeev Valentine
• Xiao Chuanxiao
• Blum Volker Wolfgang
• Mitzi David Brian

Classifications

• C07F7/24 Primary

  Lead compounds · CPC title

• C07C211/65

  Metal complexes of amines · CPC title

• C07F7/2208

  Compounds having tin linked only to carbon, hydrogen and/or halogen · CPC title

• H10K85/50

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

• H10K10/50

  Bistable switching devices · CPC title