Nanomaterial, preparation method thereof, and semiconductor device

Patent metadata

Field	Value
Publication number	US-12232339-B2
Application number	US-202217838701-A
Country	US
Kind code	B2
Filing date	Jun 13, 2022
Priority date	Dec 28, 2019
Publication date	Feb 18, 2025
Grant date	Feb 18, 2025

Abstract

A nanomaterial includes a ZnO nanocrystal and a surface ligand bonded to the ZnO nanocrystal. The surface ligand has a structure ofR1, R2, and R3 are independently selected from at least one of an alkyl group, an alkoxy group, a hydroxyalkoxy group, a hydroxyl group, or a hydrogen atom. R4 is selected from a hydrocarbon group having a carbon number of 5 to 60. A carbon number of the alkyl group ranges from 1 to 5. A carbon number of the alkoxy group ranges from 1 to 5. A carbon number of the hydroxyalkoxy group ranges from 1 to 5.

First claim

What is claimed is:

1. A nanomaterial comprising:
a ZnO nanocrystal; and
a surface ligand bonded to the ZnO nanocrystal, the surface ligand having a structure of

wherein:
R 1 , R 2 , and R 3 are independently selected from at least one of an alkyl group, an alkoxy group, a hydroxyalkoxy group, a hydroxyl group, or a hydrogen atom;
R 4 is selected from a hydrocarbon group having a carbon number of 5 to 60;
a carbon number of the alkyl group ranges from 1 to 5;
a carbon number of the alkoxy group ranges from 1 to 5; and
a carbon number of the hydroxyalkoxy group ranges from 1 to 5.

2. The nanomaterial according to claim 1 , wherein the nanomaterial is composed of the ZnO nanocrystal and the surface ligand bonded to the ZnO nanocrystal.

3. The nanomaterial according to claim 1 , wherein:
R 4 is selected from a saturated or unsaturated hydrocarbon group having 5 to 30 carbon atoms;
a total carbon number of R 1 and R 2 is less than 6; and
a carbon number of R 3 is less than 3.

4. The nanomaterial according to claim 1 , wherein:
the alkyl group is selected from a straight-chain saturated alkyl group having 1 to 5 carbon atoms;
the alkoxy group is selected from a straight-chain saturated alkoxy group having 1 to 4 carbon atoms; or
the hydroxyalkoxy group is selected from a straight-chain saturated hydroxyalkoxy group having 1 to 3 carbon atoms.

5. The nanomaterial according to claim 1 , wherein the surface ligand is selected from at least one of structures of

6. The nanomaterial according to claim 1 , wherein a molar ratio of the ZnO nanocrystal to the surface ligand ranges from 1:5 to 1:100.

7. A preparation method of a nanomaterial comprising:
providing an initial ZnO nanocrystal solution, a solute of the initial ZnO nanocrystal solution including a ZnO nanocrystal having a first surface ligand;
preparing a solution of a second surface ligand, the second surface ligand having a structure of

wherein:
R 1 , R 2 , and R 3 are independently selected from at least one of an alkyl group, an alkoxy group, a hydroxyalkoxy group, a hydroxyl group, or a hydrogen atom;
R 4 is selected from a hydrocarbon group having a carbon number of 5 to 60;
a carbon number of the alkyl group ranges from 1 to 5;
a carbon number of the alkoxy group ranges from 1 to 5; and
a carbon number of the hydroxyalkoxy group ranges from 1 to 5; and
mixing the initial ZnO nanocrystal solution and the solution of the second surface ligand to cause a displacement reaction between the first surface ligand on the initial ZnO nanocrystal surface and the second surface ligand to prepare the ZnO nanocrystal with a surface bonded with the second surface ligand.

8. The method according to claim 7 , wherein:
R 4 is selected from a saturated or unsaturated hydrocarbon group having 5 to 30 carbon atoms;
a total carbon number of R 1 and R 2 is less than 6; and
a carbon number of R 3 is less than 3.

9. The method according to claim 7 , wherein:
the alkyl group is selected from a straight-chain saturated alkyl group having 1 to 5 carbon atoms;
the alkoxy group is selected from a straight-chain saturated alkoxy group having 1 to 4 carbon atoms; or
the hydroxyalkoxy group is selected from a straight-chain saturated hydroxyalkoxy group having 1 to 3 carbon atoms.

10. The method according to claim 7 , wherein the surface ligand is selected from at least one of structures of

11. The method according to claim 7 , wherein mixing the initial ZnO nanocrystal solution and the solution of the second surface ligand includes mixing the initial ZnO nanocrystal solution and the first surface ligand solution according to a molar ratio of the ZnO nanocrystal to the second surface ligand ranging from 1:5 to 1:100.

12. The method according to claim 7 , wherein the first surface ligand is selected from at least one of an acetate ligand, a hydroxyl ligand, an alkyl ligand, or an alcohol ether ligand.

13. The method according to claim 12 , wherein the first surface ligand is selected from the acetate ligand or hydroxyl ligand.

14. The method according to claim 7 , wherein mixing the initial ZnO nanocrystal solution and the solution of the second surface ligand includes allowing a mixed solution system of the initial ZnO nanocrystal solution and the solution of the second surface ligand to react at a temperature of 50° C. to 250° C. for 20 min to 40 min.

15. A semiconductor device comprising:
an anode and a cathode opposite to each other;
an active layer between the anode and the cathode; and
an electron transport layer between the active layer and the cathode, a material of the electron transport layer including a nanomaterial, the nanomaterial including a ZnO nanocrystal and a surface ligand bonded to the ZnO nanocrystal, and the surface ligand having a structure of

wherein:
R 1 , R 2 , and R 3 are independently selected from at least one of an alkyl group, an alkoxy group, a hydroxyalkoxy group, a hydroxyl group, or a hydrogen atom;
R 4 is selected from a hydrocarbon group having a carbon number of 5 to 60;
a carbon number of the alkyl group ranges from 1 to 5;
a carbon number of the alkoxy group ranges from 1 to 5; and
a carbon number of the hydroxyalkoxy group ranges from 1 to 5.

16. The nanomaterial according to claim 15 , wherein the nanomaterial is composed of the ZnO nanocrystal and the surface ligand bonded to the ZnO nanocrystal.

17. The semiconductor device according to claim 15 , wherein:
R 4 is selected from a saturated or unsaturated hydrocarbon group having 5 to 30 carbon atoms;
a total carbon number of R 1 and R 2 is less than 6; and
a carbon number of R 3 is less than 3.

18. The semiconductor device according to claim 15 , wherein:
the alkyl group is selected from a straight-chain saturated alkyl group having 1 to 5 carbon atoms;
the alkoxy group is selected from a straight-chain saturated alkoxy group having 1 to 4 carbon atoms; or
the hydroxyalkoxy group is selected from a straight-chain saturated hydroxyalkoxy group having 1 to 3 carbon atoms.

19. The semiconductor device according to claim 15 , wherein the surface ligand includes at least one of structures of

Assignees

• Tcl Tech Group Corp

Inventors

• Wang Jin
• Yang Yixing

Classifications

• H10K30/50

  Photovoltaic [PV] devices · CPC title

• H10K30/152 Primary

  the wide bandgap semiconductor comprising zinc oxide, e.g. ZnO · CPC title

• C07C50/04

  Benzoquinones, i.e. C6H4O2 · CPC title

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• C09C3/08

  Treatment with low-molecular-weight {non-polymer} organic compounds {(C09C3/006, C09C3/048 take precedence)} · CPC title