Compound semiconductor and use thereof

Patent metadata

Field	Value
Publication number	US-11127891-B2
Application number	US-201816304085-A
Country	US
Kind code	B2
Filing date	Feb 12, 2018
Priority date	Mar 9, 2017
Publication date	Sep 21, 2021
Grant date	Sep 21, 2021

Abstract

A novel compound semiconductor that can be used for a solar battery, a thermoelectric material, and the like, and use thereof. The novel compound semiconductor may be represented by the following Chemical Formula: NdxSyCo4Sb12-zQz, wherein Q is one or more selected from the O, Se, or Te, 0<x<0.2, 0<y≤1, and 0<z<12.

First claim

The invention claimed is:

1. A compound semiconductor represented by the following Chemical Formula 1:
Nd x S y Co 4 Sb 12-z Q z   [Chemical Formula 1]

wherein, in Chemical Formula 1, Q is one or more selected from the group consisting of O, Se, and Te, 0<x<0.2, 0<y≤1, and 0<z<12.

2. The compound semiconductor according to claim 1 , wherein, in Chemical Formula 1, x≤y.

3. The compound semiconductor according to claim 1 , wherein a mole ratio of x to 1 mole of y in Chemical Formula 1 is 0.1 to 1.

4. The compound semiconductor according to claim 1 , wherein the z in Chemical Formula 1 is 0<z≤4.

5. The compound semiconductor according to claim 1 , wherein a mole ratio of x to 1 mole of z in Chemical Formula 1 is 0.01 to 0.5.

6. The compound semiconductor according to claim 1 , wherein a mole ratio of x to 1 mole of z in Chemical Formula 1 is 0.01 to 0.3.

7. A method for preparing the compound semiconductor of claim 1 , comprising the steps of:
forming a mixture comprising Nd, S, Co, Sb, and one or more elements selected from the group consisting of O, Se, and Te; and
heat treating the mixture.

8. The method for preparing the compound semiconductor according to claim 7 , wherein the heat treating step is conducted at 400° C. to 800° C.

9. The method for preparing the compound semiconductor according to claim 7 , wherein the heat treating step comprises two or more heat treating steps.

10. The method for preparing the compound semiconductor according to claim 7 , further comprising a pressurized sintering step, after the heat treating step.

11. A thermoelectric conversion element comprising the compound semiconductor according to claim 1 .

12. A solar battery comprising the compound semiconductor according to claim 1 .

13. The compound semiconductor according to claim 1 , wherein Nd and S are filled at a ratio of 1:1 to 1:8.

Assignees

• Lg Chemical Ltd

Inventors

• Ko Kyung Moon
• Park Cheol Hee
• Kim Min Kyoung
• Jung Myung Jin
• Park Chee Sung

Classifications

• C01G51/82

  Compounds containing cobalt, with or without oxygen or hydrogen, and containing two or more other elements · CPC title

• H10F77/121

  comprising only selenium or only tellurium · CPC title

• C01G51/00

  Compounds of cobalt · CPC title

• C01B19/002 Primary

  Compounds containing, besides selenium or tellurium, more than one other element, with -O- and -OH not being considered as anions · CPC title

• H01L35/16

  Electricity · mapped topic