SOLAR CELL INCLUDING LIGHT-ABSORBING LAYER CONTAINING PEROVSKITE TYPE COMPOUND

• US 20170149005A1
• Filed: 11/16/2016
• Published: 05/25/2017
• Est. Priority Date: 11/24/2015
• Status: Abandoned Application

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: SUZUKA, MICHIO, HAYASHI, NAOKI, UCHIDA, RYUUSUKE, MATSUSHITA, AKIO
• Application Number:
  US15/352,686
• Publication Number:
  US 20170149005A1
• Time in Patent Office: Days
• CPC Class Codes: H01G 9/2004 characterised by the electrolyte, e.g. comprising an organic electrolyte
• CPC Class Codes: H10K 2102/102 comprising tin oxides, e.g. fluorine-doped SnO2
• CPC Class Codes: H10K 30/10 comprising heterojunctions between organic semiconductors and inorganic semiconductors
• CPC Class Codes: H10K 30/151 the wide bandgap semiconductor comprising titanium oxide, e.g. TiO2
• CPC Class Codes: H10K 30/81 Electrodes
• CPC Class Codes: H10K 30/88 Passivation; Containers; Encapsulations
• CPC Class Codes: H10K 71/811 Controlling the atmosphere during processing H10K71/40 takes precedence
• CPC Class Codes: H10K 85/50 Organic perovskites; Hybrid organic-inorganic perovskites [HOIP], e.g. CH3NH3PbI3
• CPC Class Codes: Y02E 10/549 Organic PV cells

Abstract

A solar cell according to one aspect of the present disclosure includes: a first electrode; an electron transport layer on the first electrode; a light-absorbing layer located on the electron transport layer and containing a perovskite type compound; a second electrode on the light-absorbing layer; and a sealing body sealing at least a part of the first electrode, the electron transport layer, the light-absorbing layer, and at least a part of the second electrode. A gas containing oxygen is present between the sealing body and each of the at least a part of the first electrode, the electron transport layer, the light-absorbing layer, and the at least a part of the second electrode. The concentration of the oxygen is 5% or more, and the concentration of water is 300 ppm or less on a volume fraction basis.

Claims

1. A solar cell comprising:

a first electrode;

an electron transport layer which is located on the first electrode and which contains a semiconductor;

a light-absorbing layer which is located on the electron transport layer and which contains a perovskite type compound represented by a composition formula AMX₃, where A is a site for one or more monovalent cations, M is a site for one or more divalent cations, and X is a site for one or more halide anions;

a second electrode which is located on the light-absorbing layer; and

a sealing body which seals at least a part of the first electrode, the electron transport layer, the light-absorbing layer, and at least a part of the second electrode, wherein;

a gas is present in a space between the sealing body and each of the at least a part of the first electrode, the electron transport layer, the light-absorbing layer, and the at least a part of the second electrode;

the gas contains oxygen;

a concentration of the oxygen in the gas is 5% or more on a volume fraction basis; and

a concentration of water in the gas is 300 ppm or less on a volume fraction basis.

2. The solar cell according to claim 1, wherein:

the gas further contains an inert gas; and

a concentration of the inert gas in the gas is 50% or more on a volume fraction basis.

3. The solar cell according to claim 1,

wherein the concentration of water in the gas is 130 ppm or less on a volume fraction basis.

4. The solar cell according to claim 1,

wherein the gas is in contact with the light-absorbing layer.

5. The solar cell according to claim 1,

further comprising a hole transport layer disposed between the light-absorbing layer and the second electrode,

wherein the sealing body further seals the hole transport layer.

6. The solar cell according to claim 5,

wherein the gas is in contact with the hole transport layer.

7. The solar cell according to claim 1,

further comprising a porous layer disposed in the light-absorbing layer, the porous layer being in contact with the electron transport layer and containing a porous material.

8. The solar cell according to claim 1,

wherein the semiconductor is titanium oxide.

9. The solar cell according to claim 1,

wherein the one or more monovalent cations include at least one selected from the group consisting of a methylammonium cation and a formamidinium cation.

10. The solar cell according to claim 1,

wherein the one or more divalent cations include at least one selected from the group consisting of Pb²⁺, Ge²⁺, and Sn²⁺.

11. A solar cell comprising:

a first electrode;

an electron transport layer which is located on the first electrode and which contains a semiconductor;

a light-absorbing layer which is located on the electron transport layer and which contains a perovskite type compound represented by a composition formula AMX₃, where A is a site for one or more monovalent cations, M is a site for one or more divalent cations, and X is a site for one or more halide anions;

a second electrode which is located on the light-absorbing layer;

a sealing body which seals at least a part of the first electrode, the electron transport layer, the light-absorbing layer; and

at least a part of the second electrode; and

a moisture absorber located between the sealing body and each of the at least a part of the first electrode, the electron transport layer, the light-absorbing layer, and the at least a part of the second electrode, wherein;

a gas is present between the sealing body and each of the at least a part of the first electrode, the electron transport layer, the light-absorbing layer, and the at least a part of the second electrode;

the gas contains oxygen; and

a concentration of the oxygen in the gas is 5% or more on a volume fraction basis.

12. The solar cell according to claim 11, wherein:

the gas further contains an inert gas; and

a concentration of the inert gas in the gas is 50% or more on a volume fraction basis.

13. The solar cell according to claim 11,

wherein the gas is in contact with the light-absorbing layer.

14. The solar cell according to claim 11,

further comprising a hole transport layer disposed between the light-absorbing layer and the second electrode,

wherein the sealing body further seals the hole transport layer.

15. The solar cell according to claim 14,

wherein the gas is in contact with the hole transport layer.

16. The solar cell according to claim 11,

further comprising a porous layer disposed in the light-absorbing layer, the porous layer being in contact with the electron transport layer and containing a porous material.

17. The solar cell according to claim 11,

wherein the semiconductor is titanium oxide.

18. The solar cell according to claim 11,

wherein the one or more monovalent cations include at least one selected from the group consisting of a methylammonium cation and a formamidinium cation.

19. The solar cell according to claim 11,

wherein the one or more divalent cations include at least one selected from the group consisting of Pb²⁺, Ge²⁺, and Sn²⁺.