MULTI-JUNCTION LIGHT ENERGY CONVERSION ELEMENT, DEVICE COMPRISING THE SAME, AND FABRICATION METHOD OF SnZn2N2

Patent metadata

Field	Value
Publication number	US-2019305154-A1
Application number	US-201816223885-A
Country	US
Kind code	A1
Filing date	Dec 18, 2018
Priority date	Mar 30, 2018
Publication date	Oct 3, 2019
Grant date	—

Abstract

The present disclosure is to provide a multi-junction light energy conversion element including a material having a band gap suitable for a light energy conversion layer located upstream in an incidence direction of light. The present disclosure provides a light energy conversion element, comprising a first light energy conversion layer containing SrZn2N2 and a second light energy conversion layer containing an light energy conversion material. The light energy conversion material has a narrower band gap than the SrZn2N2.

First claim

1 . A light energy conversion element, comprising:
a first light energy conversion layer containing SrZn 2 N 2 ; and a second light energy conversion layer containing an light energy conversion material, wherein the light energy conversion material has a narrower band gap than the SrZn 2 N 2 .

2 . A device, comprising:
a light energy conversion element according to claim 1 ; a first electrode; and a second electrode, wherein the first light energy conversion layer of the light energy conversion element is present between the second light energy conversion layer of the light energy conversion element and the second electrode; and the second light energy conversion layer of the light energy conversion element is present between the first light energy conversion layer of the light energy conversion element and the first electrode.

3 . A device, comprising:
a light energy conversion element according to claim 1 ; an electrode connected electrically to the light energy conversion element; a solution; and a container containing the light energy conversion element, the electrode, and the solution.

4 . A method for fabricating SrZn 2 N 2 , the method comprising:
(a) sintering a starting material containing Sr and Zn in a gas containing nitrogen atoms to provide SrZn 2 N 2 .

5 . The method according to claim 4 , further comprising:
(pa1) grounding the starting material; (pa2) putting the starting material grounded in the step (pa1) in a vessel; (pa3) loading the vessel into a sintering furnace; (pa4) supplying N 2 into the sintering furnace; and (pa5) replacing N 2 supplied in the step (pa4) with the gas containing the nitrogen atoms, wherein all the steps (pa1)-(pa5) are performed before the step (a); and the gas containing nitrogen atoms is a gas other than a nitrogen gas.

6 . The method according to claim 4 , wherein
the gas containing nitrogen atoms in the step (a) is NH 3 .

7 . The method according to claim 4 , wherein
the starting material is at least one selected from the group consisting of SrZn 2 and SrZn 13 .

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Ueno Koki
• Kikuchi Ryosuke
• Nakamura Toru
• Kurabuchi Takahiro
• Kaneko Yasushi
• Hato Kazuhito
• Oba Fumiyasu
• Kumagai Yu

Classifications

• C25B11/02

  characterised by shape or form · CPC title

• C01B21/0612 Primary

  with alkaline-earth metals, beryllium or magnesium · CPC title

• C25B1/04

  by electrolysis of water · CPC title

• C01P2002/72

  by d-values or two theta-values, e.g. as X-ray diagram · CPC title

• C01P2006/40

  Electric properties · CPC title