Substituted lead halide perovskite intermediate band absorbers

Patent metadata

Field	Value
Publication number	US-2018201637-A1
Application number	US-201715406419-A
Country	US
Kind code	A1
Filing date	Jan 13, 2017
Priority date	Jan 13, 2017
Publication date	Jul 19, 2018
Grant date	—

Abstract

Lead halide perovskites have proven to be a versatile class of visible light absorbers that allow rapid access to the long minority carrier lifetimes and diffusion lengths desirable for traditional single-junction photovoltaics. Computational screening identified both Fe- and Co-substituted MAPbBr 3 as promising intermediate band candidate materials, and the later films were synthesized via conventional solution-based processing techniques. First-principles density functional theory (DFT) calculations support the existence of intermediate bands upon Co incorporation and enhanced sub-gap absorption, which are confirmed by UV-visible-NIR absorption spectroscopy. The simple tenability combined with steady state and time-resolved PL studies that reveal no sign of self-quenching suggest this class of materials to be promising for intermediate band photovoltaics.

First claim

What is claimed is:

1 . A substituted perovskite comprising:
a material having the formula:
APb 1-x B x Br 3-y Cl y ,
where A is a cation, B is Fe or Co, X is greater than 0 and less than 1 and y is 0-3).

2 . The substituted perovskite of claim 1 , wherein the cation is selected from the group consisting of methyl ammonium, formamidinium, and cesium.

3 . The substituted perovskite of claim 1 , having a tolerance factor of 0.813-1.107.

4 . The substituted perovskite of claim 1 , wherein y=0.

5 . The substituted perovskite of claim 1 wherein y is greater than zero.

6 . The substituted perovskite of claim 1 wherein x is 0.5 or less.

7 . The substituted perovskite of claim 1 , wherein B is Fe.

8 . The substituted perovskite of claim 1 , wherein B is Co.

9 . A substituted perovskite comprising:
a material having the formula:
MAPb 1-x B x Br 3-y H y ,
where MA is methyl ammonium, B is Fe or Co, H is a halide, X is 0 to 0.5 and y is greater than 0 and less than 3.

10 . The substituted perovskite of claim 9 , wherein y=1.5.

11 . The substituted perovskite of claim 9 , wherein B is Fe.

12 . The substituted perovskite of claim 9 , wherein B is Co.

13 . The substituted perovskite of claim 9 , having a tolerance factor of 0.813-1.107.

14 . The substituted perovskite of claim 9 , wherein H is Cl.

15 . An article of manufacture comprising:
a glass substrate; and a material deposited on the glass substrate having the formula:
APb 1-x B x Br 3-y Cl y ,
where MA is methyl ammonium, B is Fe or Co, X is 0 to 1 and y is 0 to 3.

16 . The article of manufacture of claim 15 comprising wherein the cation is selected from the group consisting of methyl ammonium, formamidinium, and cesium.

17 . The article of manufacture of claim 15 where y=0.

18 . The article of manufacture of claim 15 wherein x=0.

19 . The article of manufacture of claim 15 wherein y is greater than 0.

20 . The article of manufacture of claim 15 wherein x is greater than 0.

Assignees

• Uchicago Argonne Llc

Inventors

• Sampson Matthew D
• Chan Maria K
• Martinson Alex B

Classifications

• H01G9/2045

  comprising a semiconductor electrode comprising elements of the fourth group of the Periodic Table with or without impurities, e.g. doping materials · CPC title

• C07F7/24 Primary

  Lead compounds · CPC title

• C07F15/065 Primary

  without a metal-carbon linkage · CPC title

• C03C17/256

  Coating containing TiO2 · CPC title

• C03C2217/23

  Mixtures · CPC title