Hybrid perovskite material processing

Patent metadata

Field	Value
Publication number	US-9880458-B1
Application number	US-201715489431-A
Country	US
Kind code	B1
Filing date	Apr 17, 2017
Priority date	Apr 17, 2017
Publication date	Jan 30, 2018
Grant date	Jan 30, 2018

Abstract

A method for preparing photoactive perovskite materials. The method comprises the steps of: introducing a lead halide and a first solvent to a first vessel and contacting the lead halide with the first solvent to dissolve the lead halide to form a lead halide solution, introducing a Group 1 metal halide a second solvent into a second vessel and contacting the Group 1 metal halide with the second solvent to dissolve the Group 1 metal halide to form a Group 1 metal halide solution, and contacting the lead halide solution with the Group 1 metal halide solution to form a thin-film precursor ink. The method further comprises depositing the thin-film precursor ink onto a substrate, drying the thin-film precursor ink to form a thin film, annealing the thin film; and rinsing the thin film with a salt solution.

First claim

What is claimed is:

1. A method comprising the steps of:
preparing a thin-film precursor ink, wherein preparing the thin-film precursor ink comprises the steps of:
introducing a lead halide into a first vessel;
introducing a first solvent to the first vessel;
contacting the lead halide with the first solvent to dissolve the lead halide to form a lead halide solution;
introducing a Group 1 metal halide into a second vessel;
introducing a second solvent into the second vessel; and
contacting the Group 1 metal halide with the second solvent to dissolve the group 1 metal halide to form a Group 1 metal halide solution;
contacting the lead halide solution with the Group 1 metal halide solution to form the thin-film precursor ink;

depositing the thin-film precursor ink onto a substrate;
drying the thin-film precursor ink to form a thin film;
annealing the thin film; and
rinsing the thin film with a salt solution comprising a third solvent and a salt selected from the group consisting of methylammonium halide, formamidinium halide, guanidinium halide, ethene tetramine halide, imidazolium halide, 1,2,2-triaminovinyl ammonium halide, and 5-aminovaleric acid hydrohalide.

2. The method of claim 1 , wherein the lead halide comprises lead (II) iodide.

3. The method of claim 1 , wherein the Group 1 metal halide comprises cesium iodide.

4. The method of claim 1 , wherein the Group 1 metal halide comprises rubidium iodide.

5. The method of claim 1 , wherein the Group 1 metal halide comprises sodium iodide.

6. The method of claim 1 , wherein the Group 1 metal halide comprises potassium iodide.

7. The method of claim 1 , wherein the first solvent and the second solvent are selected from the group consisting of dry N-cyclohexyl-2-pyrrolidone, alkyl-2-pyrrolidone, dimethylformamide (DMF), dialkylformamide, dimethylsulfoxide (DMSO), methanol, ethanol, propanol, butanol, tetrahydrofuran, formamide, tert-butylpyridine, pyridine, alkylpyridine, pyrrolidine, chlorobenzene, dichlorobenzene, dichloromethane, chloroform, and combinations thereof.

8. The method of claim 1 , wherein the first solvent comprises dry dimethylformamide (DMF).

9. The method of claim 1 , wherein the second solvent comprises dimethylsulfoxide (DMSO).

10. The method of claim 1 , wherein the third solvent is selected from the group consisting of dimethylformamide, isopropanol, methanol, ethanol, butanol, chloroform, chlorobenzene, dimethylsulfoxide, water, and combinations thereof.

11. The method of claim 1 , wherein the thin-film precursor ink has a molar concentration of the Group 1 metal halide that is between 1% and 25% of the molar concentration of the lead halide.

12. The method of claim 1 , wherein annealing the thin film occurs for between about 5 to about 30 minutes at a temperature between about 40° C. to about 60° C.

13. The method of claim 1 , wherein the salt comprises formamidinium iodide.

14. The method of claim 1 , wherein the salt comprises methylammonium iodide.

15. The method of claim 1 , wherein rinsing the thin film comprises at least partial submersion in the salt solution.

Assignees

• Hunt Energy Entpr Llc
• Hee Solar Llc

Inventors

• Irwin Michael D
• Mielczarek Kamil
• Dhas Vivek V

Classifications

• H01G9/2059 Primary

  comprising an organic dye as the active light absorbing material, e.g. adsorbed on an electrode or dissolved in solution · CPC title

• H01G9/2009

  Solid electrolytes · CPC title

• H01G9/2031

  comprising titanium oxide, e.g. TiO2 (H01G9/2036 takes precedence) · CPC title

• B05D3/107

  Post-treatment of applied coatings · CPC title

• C01D3/12

  Iodides · CPC title