Solar cell

Patent metadata

Field	Value
Publication number	US-11935971-B2
Application number	US-202217821818-A
Country	US
Kind code	B2
Filing date	Aug 24, 2022
Priority date	Mar 12, 2020
Publication date	Mar 19, 2024
Grant date	Mar 19, 2024

Abstract

A solar cell according to the present disclosure includes a first electrode, a second electrode, a photoelectric conversion layer disposed between the first electrode and the second electrode, and an electron transport layer disposed between the first electrode and the photoelectric conversion layer. At least one electrode selected from the group consisting of the first electrode and the second electrode has a light-transmitting property. The photoelectric conversion layer contains a perovskite compound composed of a monovalent cation, a divalent cation, and a halogen anion. The electron transport layer contains a metal oxynitride having electron conductivity. The metal oxynitride has an electrical conductivity of greater than or equal to 1×10 −7 S/cm.

First claim

What is claimed is:

1. A solar cell comprising:
a first electrode;
a second electrode;
a photoelectric conversion layer disposed between the first electrode and the second electrode; and
an electron transport layer disposed between the first electrode and the photoelectric conversion layer,
wherein at least one electrode selected from the group consisting of the first electrode and the second electrode has a light-transmitting property,
the photoelectric conversion layer contains a perovskite compound composed of a monovalent cation, a divalent cation, and a halogen anion,
the electron transport layer contains a metal oxynitride having electron conductivity, and
the metal oxynitride is a niobium oxynitride and has an electrical conductivity of greater than or equal to 1×10 −7 S/cm, and
in the niobium oxynitride, a ratio N/O of the amount of substance of N to the amount of substance of O is greater than or equal to 0.05 and less than or equal to 0.28.

2. The solar cell according to claim 1 ,
wherein the metal oxynitride is at least one selected from the group consisting of a niobium oxynitride, a tin oxynitride, a titanium oxynitride, a zinc oxynitride, an indium oxynitride, a tungsten oxynitride, an iron oxynitride, a cesium oxynitride, a nitrided strontium titanate, a nitrided zinc tin oxide, and a nitrided barium tin oxide.

3. The solar cell according to claim 2 ,
wherein the metal oxynitride is at least one selected from the group consisting of a niobium oxynitride and a tin oxynitride.

4. The solar cell according to claim 1 ,
wherein the monovalent cation includes a formamidinium cation.

5. The solar cell according to claim 1 ,
wherein the halogen anion include an iodide ion.

6. The solar cell according to claim 1 ,
wherein the divalent cation includes at least one selected from the group consisting of a tin ion and a lead ion.

7. The solar cell according to claim 1 ,
wherein a hole transport layer is disposed between the second electrode and the photoelectric conversion layer.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Yokoyama Tomoyasu
• Kikuchi Ryosuke
• Nishitani Yu

Classifications

• H10K85/50

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

• H10K30/85

  Layers having high electron mobility, e.g. electron-transporting layers or hole-blocking layers · CPC title

• H10K30/50

  Photovoltaic [PV] devices · CPC title

• H10F77/211

  for photovoltaic cells · CPC title

• H10K30/40 Primary

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