Semiconductor Photoelectrode

Patent metadata

Field	Value
Publication number	US-2021123150-A1
Application number	US-201917058570-A
Country	US
Kind code	A1
Filing date	May 10, 2019
Priority date	May 29, 2018
Publication date	Apr 29, 2021
Grant date	—

Abstract

To improve light energy conversion efficiency of a semiconductor photoelectrode. A semiconductor photoelectrode in which an oxidation reaction of water proceeds on a surface by irradiation with light includes a first semiconductor layer laminated on an insulating or conductive substrate, and a transparent conductive polymer layer laminated on the first semiconductor layer, made of a transparent conductive polymer, and having an activity function of promoting the oxidation reaction of water. Due to the transparency of the transparent conductive polymer layer, light transmittance is improved, and the transparent conductive polymer layer can be laminated on the entire surface of the semiconductor layer, allowing the light energy conversion efficiency of the semiconductor photoelectrode to be improved.

First claim

1 . A semiconductor photoelectrode in which an oxidation reaction of water proceeds on a surface by irradiation with light, comprising;
a first semiconductor layer laminated on an insulating or conductive substrate; and a transparent conductive polymer layer laminated on the first semiconductor layer, made of a transparent conductive polymer, and having an activity function of promoting the oxidation reaction of water.

2 . A semiconductor photoelectrode in which an oxidation reaction of water proceeds on a surface by irradiation with light, comprising
a first semiconductor layer laminated on an insulating or conductive substrate; a second semiconductor layer laminated on the first semiconductor layer and having a lattice constant of a plane perpendicular to a crystal growth direction that is smaller than that of the first semiconductor layer; and a transparent conductive polymer layer laminated on the second semiconductor layer, made of a transparent conductive polymer, and having an activity function of promoting the oxidation reaction of water.

Assignees

• Nippon Telegraph & Telephone

Inventors

• Uzumaki Yuya
• Sato Sayumi
• Ono Yoko
• Komatsu Takeshi

Classifications

• C25B1/55 Primary

  Photoelectrolysis · CPC title

• B01J35/395

  Thickness of the active catalytic layer · CPC title

• C25B11/095

  at least one of the compounds being organic · CPC title

• Y02E60/36

  Hydrogen production from non-carbon containing sources, e.g. by water electrolysis · CPC title

• C25B11/053 Primary

  characterised by multilayer electrocatalytic coatings · CPC title