HALIDE DOUBLE PEROVSKITE Cs2AgBiBr6 SOLAR-CELL ABSORBER HAVING LONG CARRIER LIFETIMES

Patent metadata

Field	Value
Publication number	US-2017194101-A1
Application number	US-201715397565-A
Country	US
Kind code	A1
Filing date	Jan 3, 2017
Priority date	Dec 31, 2015
Publication date	Jul 6, 2017
Grant date	—

Abstract

A solar-cell absorber layer for use in solar cells including tandem solar cells, is made of a metal-halide double perovskite material. The metal-halide double perovskite material has the formula A 2 BB′X 6 , where A is an inorganic cation, an organic cation, or a mixture of organic and inorganic cations where B and B′ are metals, and where X is a halide or a mixture of halides. For example, A can be Cs, Rb, K, Ba, CH 3 NH 3 , (NH 2 ) 2 CH, or a mixture where B is Bi, Ag, Sn, In, Sb, Cu, Na, K, or Au of a predetermined oxidation state, and where B′ is Bi, Ag, Sn, In, Sb, Ga, Cu, or Au of various oxidation states, and where X is Br, I, Cl, F, or a mixture. One example of the metal-halide double perovskite material is Cs 2 BiAgBr 6 .

First claim

What is claimed is:

1 . A solar cell comprising a solar-cell absorber layer made of a metal-halide double perovskite material.

2 . The solar cell of claim 1 , further comprising a hole-selective contact layer, an electron-selective contact layer, and first and second electrode layers.

3 . The solar cell of claim 1 , wherein the metal-halide double perovskite material has the formula A 2 BB′X 6 , where A is an inorganic cation, an organic cation, or a mixture of organic and inorganic cations, where B and B′ are metals, and where X is a halide or a mixture of halides.

4 . The solar cell of claim 3 , wherein A is Cs, Rb, K, Ba, CH 3 NH 3 , or (NH 2 ) 2 CH, where B is Bi, Ag, Sn, In, Sb, Cu, Na, K, or Au of a predetermined oxidation state, where B′ is Bi, Ag, Sn, In, Sb, Cu, Ga, or Au of various oxidation states, and where X is Br, I, Cl, or F.

5 . The solar cell of claim 1 , wherein the metal-halide double perovskite material is Cs 2 BiAgBr 6 .

6 . A tandem solar cell comprising first and second solar cells of different types, wherein one of the first and second solar cells includes a first solar-cell absorber layer made of a metal-halide double perovskite material and wherein the other one of the first and second solar cells includes a second solar-cell absorber layer.

7 . The tandem solar cell of claim 6 , wherein the first and second solar cells are mechanically stacked or monolithically integrated.

8 . The tandem solar cell of claim 6 , wherein the one of the first and second solar cells including the first solar-cell absorber layer further includes a glass layer and first and second transparent electrode layers.

9 . The tandem solar cell of claim 6 , wherein the other one of the first and second solar cells further includes an emitter layer or a transparent electrode layer, and a contact layer.

10 . The tandem solar cell of claim 6 , further comprising a tunnel junction/recombination layer for integrating the first and second solar-cell absorber layers.

11 . The tandem solar cell of claim 6 , further comprising a transparent electrode over the first solar-cell absorber layer or a contact layer under the first and second solar-cell absorber layers.

12 . The tandem solar cell of claim 6 , further comprising a dichroic mirror between the first and second solar cells for dividing the solar radiation spectrum between the first and second solar cells.

13 . The tandem solar cell of claim 12 , wherein the first solar cell further includes a glass layer, a transparent electrode layer, and a contact layer.

14 . The tandem solar cell of claim 12 , wherein the other one of the first and second solar cells further includes an emitter layer or a transparent electrode layer, and a contact layer.

15 . The tandem solar cell of claim 6 , wherein the metal-halide double perovskite material has the formula A 2 BB′X 6 , where A is an inorganic cation, an organic cation, or a mixture of organic and inorganic cations, where B and B′ are metals, and where X is a halide or a mixture of halides.

16 . The tandem solar cell of claim 15 , wherein A is Cs, Rb, K, Ba, CH 3 NH 3 , or (NH 2 ) 2 CH, where B is Bi, Ag, Sn, In, Sb, Cu, Na, K, or Au of a predetermined oxidation state, where B′ is Bi, Ag, Sn, In, Sb, Cu, Na, K, Ga, or Au of various oxidation states, and where X is Br, I, Cl, or F.

17 . The tandem solar cell of claim 6 , wherein the metal-halide double perovskite material is Cs 2 BiAgBr 6 .

18 . The tandem solar cell of claim 6 , wherein the second solar-cell absorber layer is made of Si or CIGS.

19 . The tandem solar cell of claim 6 , wherein the one of the first and second solar cells including the first solar-cell absorber layer is a top solar cell and the other one of the first and second solar cells is a bottom solar cell.

20 . A solar-cell absorber comprising a metal-halide double perovskite material.

Assignees

• Univ Leland Stanford Junior

Inventors

• Karunadasa Hemamala Indivari
• Slavney Adam H

Classifications

• H01G9/2027 Primary

  comprising an oxide semiconductor electrode · CPC title

• H01G9/2009 Primary

  Solid electrolytes · CPC title

• H01L27/286

  Electricity · mapped topic

• H01L51/4293

  Electricity · mapped topic

• H01L51/442

  Electricity · mapped topic