Transparent electrode, method for producing the same, and electronic device using transparent electrode

Patent metadata

Field	Value
Publication number	US-2023025098-A1
Application number	US-202217930582-A
Country	US
Kind code	A1
Filing date	Sep 8, 2022
Priority date	Mar 4, 2021
Publication date	Jan 26, 2023
Grant date	—

Abstract

To provide a transparent electrode that hardly causes migration of silver and has high resistance, a method for producing the same, and an electronic device using the transparent electrode.
A transparent electrode according to the embodiment includes a laminated structure in which a transparent base material, a conductive silver-containing layer, and a conductive oxide layer are laminated in this order,
wherein a ratio T 800 /T 600 of total transmittances of the transparent electrode is 0.85 or more, where T 800 and T 600 are transmittances at wavelengths of 800 nm and 600 nm, respectively, and
the silver-containing layer is continuous. This electrode can be produced by bringing sulfur or a sulfur compound into contact with a laminated film in which a conductive silver-containing layer and a conductive oxide layer are laminated to form a sulfur-containing silver compound layer.

First claim

1 . A transparent electrode, comprising a laminated structure in which a conductive silver-containing layer and a first conductive oxide layer are laminated in this order,
wherein a ratio T 800 /T 600 of a total transmittance of the transparent electrode is 0.85 or more, where T 800 and T 600 are transmittances at wavelengths of 800 nm and 600 nm, respectively, and the silver-containing layer is continuous when a cross section of the transparent electrode is observed with a scanning electron microscope.

2 . The transparent electrode according to claim 1 , wherein the silver-containing layer includes silver or a silver alloy.

3 . The transparent electrode according to claim 1 , wherein the oxide is indium-doped tin oxide, fluorine-doped tin oxide, or aluminum-doped zinc oxide.

4 . The transparent electrode according to claim 1 , wherein the first conductive oxide layer has an ununiform portion, and the ununiform portion includes a sulfur-containing silver compound layer.

5 . The transparent electrode according to claim 1 , wherein an entire surface of the silver-containing layer is covered with the oxide layer or the sulfur-containing silver compound layer.

6 . The transparent electrode according to claim 1 , further comprising a graphene layer, a polystyrene layer, or another oxide layer on the first conductive oxide layer.

7 . The transparent electrode according to claim 1 , further comprising a transparent base material and comprising a laminated structure in which the silver-containing layer and the first conductive oxide layer are laminated in this order on the transparent base material.

8 . The transparent electrode according to claim 7 , further comprising a second conductive oxide layer between the transparent base material and the silver-containing layer.

9 . A transparent electrode comprising a laminated structure in which a conductive silver-containing layer and a first conductive oxide layer are laminated in this order,
wherein the silver-containing layer is continuous when a cross section of the transparent electrode is observed with a scanning electron microscope, and the first conductive oxide layer includes a sulfur-containing silver compound.

10 . A method for producing a transparent electrode that includes a laminated film in which a conductive silver-containing layer and a first conductive oxide layer are laminated in this order, the method comprising a step (b) of bringing sulfur or a sulfur compound into contact with the laminated film.

11 . The method according to claim 10 , wherein the step (b) includes:
(b1) bringing the laminated film into contact with a sulfur vapor gas; (b2) bringing the laminated film into contact with hydrogen sulfide gas; (b3) bringing the laminated film into contact with an aqueous solution of hydrogen sulfide, sodium sulfide, or ammonium sulfide; or (b4) contacting the laminated membrane with a solution of thioamide or thiourea.

12 . The method according to claim 11 , wherein the step (b4) includes applying an alcohol solution of thioamide or thiourea to the laminated film and heating.

13 . The method according to claim 10 , wherein in the step (b), a sulfur concentration in the gas, in the aqueous solution, or in the solution is observed, and contact conditions are adjusted based on the observed concentration.

14 . The method according to claim 10 , further comprising a step (c) of laminating a graphene layer or a polystyrene layer before or after the step (b).

15 . The method according to claim 10 , further comprising a step (d) of laminating a third inorganic oxide layer before or after the step (b).

16 . The method according to claim 10 , wherein the laminated film is formed by forming the silver-containing layer on a transparent base material and forming the first conductive oxide layer on the silver-containing layer.

17 . The method according to claim 11 , wherein the step (b1) or (b2) includes continuously passing the laminated film through an atmosphere of any of the sulfur vapor gas or the hydrogen sulfide gas, and a moisture content or an oxygen content in the atmosphere is controlled not to increase.

18 . An electronic device, comprising the transparent electrode according to claim 1 , an active layer, and a counter electrode.

19 . An electronic device according to claim 18 , wherein the active layer is a photoelectric conversion layer.

20 . The electronic device according to claim 18 , wherein the active layer includes a halogen ion.

Assignees

• Toshiba Kk
• Toshiba Energy Systems & Solutions Corp

Inventors

• Shida Naomi
• Naito Katsuyuki
• Saita Yutaka

Classifications

• C25B11/046

  Alloys · CPC title

• H05B33/28

  of translucent electrodes · CPC title

• H01L31/022466 Primary

  Electricity · mapped topic

• C25B11/067

  Inorganic compound e.g. ITO, silica or titania · CPC title

• H10K50/805

  Electrodes · CPC title