Semiconductor nanoparticles, a color conversion member for a display device including the same, an electronic apparatus including the semiconductor nanoparticles, and a method of manufacturing the semiconductor nanoparticles

Patent metadata

Field	Value
Publication number	US-12258508-B2
Application number	US-202117522904-A
Country	US
Kind code	B2
Filing date	Nov 10, 2021
Priority date	Nov 11, 2020
Publication date	Mar 25, 2025
Grant date	Mar 25, 2025

Abstract

A semiconductor nanoparticle for a color conversion member of a display device includes: a central portion including at least one of i) InP, ii) a ternary compound consisting of indium, phosphorus, and one element of Groups I-VII, and iii) InP doped with at least one transition metal of Groups I-VII; an inner portion proximate to the central portion and including a phosphide of at least one of boron, aluminum, and gallium; a middle portion proximate to the inner portion and including at least one of ZnSe and ZnSe x S 1-x ; and an outer portion proximate to the middle portion and including one or more compounds of Groups II-VI, wherein x is 0<x<1.

First claim

What is claimed is:

1. A semiconductor nanoparticle comprising:
a central portion including at least one of i) InP, ii) a ternary compound consisting of indium, phosphorus, and one element of Groups I-VII, and iii) InP doped with at least one transition metal of Groups I-VII;
an inner portion proximate to the central portion and including a phosphide of at least one of boron, aluminum, and gallium;
a middle portion proximate to the inner portion and including at least one of ZnSe and ZnSe x S 1-x ; and
an outer portion proximate to the middle portion and including one or more compounds of Groups II-VI, wherein
the middle portion comprises a middle shell including multi-layered shells and further includes, in a portion thereof adjacent to the inner portion, a doping layer containing at least one of ZnSe and ZnSe x S 1-x which are doped with at least one metal of B, Al, and Ga, and
xis 0<x<1.

2. The semiconductor nanoparticle of claim 1 , wherein the semiconductor nanoparticle is configured to emit visible light other than blue light.

3. The semiconductor nanoparticle of claim 1 , wherein the semiconductor nanoparticle is configured to emit light having a maximum emission wavelength of about 500 nm to about 650 nm.

4. The semiconductor nanoparticle of claim 1 , wherein the central portion comprises a core, the inner portion comprises an inner shell directly covering the core, the middle portion comprises a middle shell directly covering the inner shell, and the outer portion comprises an outer shell directly covering the middle shell.

5. The semiconductor nanoparticle of claim 1 , wherein the central portion comprises a core including at least one of InP, InGaP, InAIP, Cu-doped InP, Mn-doped InP, and Ag-doped InP.

6. The semiconductor nanoparticle of claim 1 , wherein the inner portion comprises an inner shell including at least one of BP, AIP, and GaP.

7. The semiconductor nanoparticle of claim 1 , wherein the compound of Groups II-VI includes Zn, and is a binary compound or a ternary compound.

8. The semiconductor nanoparticle of claim 1 , wherein the one or more compounds of Groups II-VI comprise at least one of ZnS, ZnSe, ZnTe, ZnO, ZnSeS, ZnSeTe, and ZnSTe.

9. The semiconductor nanoparticle of claim 1 , wherein the one or more compounds of Groups II-VI comprise ZnS.

10. The semiconductor nanoparticle of claim 1 , wherein a ratio of a total molar number of B, Al, or Ga contained in the inner portion to a molar number of In contained in the central portion is about 0.01 to about 10.

11. The semiconductor nanoparticle of claim 1 , wherein the inner portion comprises an inner shell having a thickness of about 0.1 nm to about 0.7 nm.

12. The semiconductor nanoparticle of claim 1 , wherein a full width at half maximum of an emission wavelength spectrum of the semiconductor nanoparticle is about 60 nm or less.

13. A method of manufacturing the semiconductor nanoparticle of claim 1 , the method comprising the steps of:
preparing a first material by reacting a first precursor including indium with aminophosphine;
preparing a second material including at least one of ZnSe and ZnSe x S 1-x ;
preparing a mixture including the first material, the second material, and a second precursor including boron, aluminum, or gallium; and
adding a compound of Groups II-VI to the mixture.

14. The method of claim 13 , wherein the step of preparing the mixture including the first material, the second material, and the second precursor including boron, aluminum, or gallium comprises i) the second precursor is added to the first material, and then the second material is added thereto, or ii) the second material is added to the first material, and then the second precursor is added thereto, or iii) the second material and the second precursor are simultaneously added to the first material.

15. A color conversion member including a semiconductor nanoparticle, wherein the semiconductor nanoparticle comprises:
a central portion including at least one of i) InP, ii) a ternary compound consisting of indium, phosphorus, and an element of Groups I-VII, and iii) InP doped with at least one transition metal of Groups I-VII;
an inner portion covering the central portion and including a phosphide of at least one of boron, aluminum, and gallium;
a middle portion covering the inner portion and including at least one of ZnSe and ZnSe x S 1-x ; and
an outer portion covering the middle portion and including a compound of Groups II-VI, wherein
the middle portion comprises a middle shell including multi-layered shells and further includes, in a portion thereof adjacent to the inner portion, a doping layer containing at least one of ZnSe and ZnSe x S 1-x which are doped with at least one metal of B, Al, and Ga, and
x is 0<x<1.

16. An electronic apparatus comprising:
the color conversion member of claim 15 ; and
a display.

17. The electronic apparatus of claim 16 , wherein at least one region of the color conversion member includes the semiconductor nanoparticle and is configured to absorb visible light emitted from the display.

18. The electronic apparatus of claim 17 , wherein the at least one region of the color conversion member is configured to emit visible light other than blue light.

19. The electronic apparatus of claim 16 , wherein the display includes a liquid crystal display, an organic light-emitting display, or an inorganic light-emitting display.

Assignees

• Samsung Display Co Ltd
• Hongik Univ Industry Academia Cooperation Foundation

Inventors

• Lee Hyeokjin
• Yang Heesun
• Kwon Sunyoung
• Kwon Youngsoo
• Oh Keunchan
• Jo Jungho

Classifications

• C09K11/70

  containing phosphorus · CPC title

• H10K50/115 Primary

  comprising active inorganic nanostructures, e.g. luminescent quantum dots · CPC title

• H10K59/38

  comprising colour filters or colour changing media [CCM] · CPC title

• B82Y20/00

  Nanooptics, e.g. quantum optics or photonic crystals · CPC title

• B82Y40/00

  Manufacture or treatment of nanostructures · CPC title