Organic-inorganic perovskite materials and methods of making the same

Patent metadata

Field	Value
Publication number	US-11174276-B2
Application number	US-201816640903-A
Country	US
Kind code	B2
Filing date	Sep 5, 2018
Priority date	Sep 6, 2017
Publication date	Nov 16, 2021
Grant date	Nov 16, 2021

Abstract

The present disclosure relates to a method that includes treating a liquid that includes a first precursor at a concentration C1, a second precursor at a concentration C2, a third precursor at a concentration C3, and an additive at a concentration C4, where the treating results in a perovskite, each of C1, C2, and C3 are between 0.001 M and 100 M, inclusively, and at least one of C4/C1 or C4/C2 equals a ratio greater than or equal to zero

First claim

What is claim is:

1. A method comprising:
treating a liquid comprising a first precursor at a concentration C 1 , a second precursor at a concentration C 2 , a third precursor at a concentration C 3 , a fourth precursor, and an additive at a concentration C 4 , wherein:
the first precursor comprises cesium and a first halide comprising at least one of iodide or bromide,
the second precursor comprises formamidinium (FA) and a second halide comprising at least one of iodide or bromide,
the third precursor comprises PbBr 2 ,
the fourth precursor comprises PbI 2 ,
the additive comprises at least one of methylammonium bromide (MABr) or methylammonium iodide (MAI),
the treating results in a perovskite comprising FA x Cs 1-x Pb(I y Br 1-y ) 3 that is substantially free of MA,
0 <x<1,
0 <y<1,
each of C 1 , C 2 , and C 3 are between 0.001 M and 100 M, inclusively, and
at least one of C 4 /C 1 or C 4 /C 2 equals a ratio greater than or equal to zero.

2. The method of claim 1 , wherein the ratio is between greater than zero and less than 0.5.

3. The method of claim 1 , wherein the composition comprises approximately FA 0.83 Cs 0.17 Pb(I 0.6 Br 0.4 ) 3 .

4. The method of claim 1 , wherein the perovskite has a bandgap greater than or equal to 1.6 eV.

5. The method of claim 1 , wherein the liquid comprises a solvent.

6. The method of claim 5 , wherein the treating comprises heating the liquid resulting in removal of the solvent.

7. The method of claim 5 , wherein the treating comprises exposing the liquid to a gas stream resulting in removal of the solvent.

8. The method of claim 1 , wherein the first halide is different than the second halide.

Assignees

• Alliance Sustainable Energy

Inventors

• Zhu Kai
• Yang Mengjin
• Kim Donghoe

Classifications

• H10K85/50

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

• H10K30/40

  comprising a p-i-n structure, e.g. having a perovskite absorber between p-type and n-type charge transport layers · CPC title

• H10K30/50

  Photovoltaic [PV] devices · CPC title

• C07F7/24 Primary

  Lead compounds · CPC title

• C01G21/006 Primary

  Compounds containing lead, with or without oxygen or hydrogen, and containing two or more other elements · CPC title