Composition comprising quantum dot and device using same

Patent metadata

Field	Value
Publication number	US-9512353-B2
Application number	US-201314374062-A
Country	US
Kind code	B2
Filing date	Feb 1, 2013
Priority date	Feb 1, 2012
Publication date	Dec 6, 2016
Grant date	Dec 6, 2016

Abstract

The present invention provides a composition including a quantum dot and vinyl siloxane including an alkyl group having a carbon number of 4 or more, and a device to which the composition is applied, wherein the composition can effectively be applied to various types of light emitting devices due to excellent dispersibility of quantum dots, UV-stability, and heat-resistance.

First claim

What is claimed is:

1. A composition comprising vinyl siloxane including an alkyl group having a carbon number of 4 or more and a quantum dot,
wherein the vinyl siloxane comprises a structure of the following Chemical Formula 1:

in Chemical Formula 1,
Ra, Rb, and Rc are independently an alkyl group having a carbon number of 1 to 4, a vinyl group, or an aryl group having a carbon number of 6 to 18, and one or more of Ra, Rb, and Rc are a vinyl group,
R 1 to R 7 are independently an alkyl group having a carbon number of 1 to 4, or an aryl group having a carbon number of 6 to 18,
Rx and Ry are independently an alkyl group having a carbon number of 1 to 3, an alkyl group having a carbon number of 4 to 20, or an aryl group having a carbon number of 6 to 18, and one or more of Rx and Ry are an alkyl group having a carbon number of 4 to 20, and
l, m, and n are numbers which satisfy a ratio of 0.02 to 0.4:0.02 to 0.4:0.2 to 0.96 (l:m:n).

2. The composition of claim 1 , wherein the vinyl siloxane comprises a structure of the following Chemical Formula 2:

in Chemical Formula 2,
R 1 to R 7 are independently an alkyl group having a carbon number of 1 to 4, or an aryl group having a carbon number of 6 to 18,
Rz is an alkyl group having a carbon number of 4 to 20, and
p and q are numbers which satisfy a ratio of 0.04 to 0.8:0.2 to 0.96 (p:q).

3. The composition of claim 1 , wherein the vinyl siloxane comprises a structure of the following Chemical Formula 3:

in Chemical Formula 3,
R 1 to R 8 are independently an alkyl group having a carbon number of 1 to 4, or an aryl group having a carbon number of 6 to 18,
Rz is an alkyl group having a carbon number of 4 to 20, and
p and q are numbers which satisfy a ratio of 0.04 to 0.8:0.2 to 0.96 (p:q).

4. The composition of claim 1 , wherein the vinyl siloxane comprises one or more of structures of the following Formulae 4 to 7:

in Formulas 4 to 7, a and b are independently numbers which satisfy 0.2 to 0.5:0.5 to 0.8 (a:b).

5. The composition of claim 1 , wherein the vinyl siloxane has a molecular weight of 300 to 50,000.

6. The composition of claim 1 , wherein the composition comprises 100 parts by weight of vinyl siloxane including an alkyl group having a carbon number of 4 or more; and
0.001 to 10 parts by weight of a quantum dot.

7. The composition of claim 1 , wherein the quantum dot has an emission peak at one or more of a wavelength of 520 to 570 nm and 620 to 670 nm.

8. The composition of claim 1 , wherein the quantum dot has an emission peak at a wavelength of 570 to 620 nm.

9. The composition of claim 1 , further comprising:
a fluorescent substance.

10. A composition comprising vinyl siloxane including an alkyl group having a carbon number of 4 or more and a quantum dot, wherein the composition further comprises vinyl siloxane having a structure of the following Chemical Formula 8 and including an alkyl group having a carbon number of 3 or less:

in Chemical Formula 8,
Ra, Rb, and Rc are independently an alkyl group having a carbon number of 1 to 3, a vinyl group, or an aryl group having a carbon number of 6 to 18, and one or more of Ra, Rb, and Rc are a vinyl group,
R 1 to R 7 are independently an alkyl group having a carbon number of 1 to 3, or an aryl group having a carbon number of 6 to 18,
Rx and Ry are independently an alkyl group having a carbon number of 1 to 3, or an aryl group having a carbon number of 6 to 18, and one or more of Rx and Ry are an alkyl group having a carbon number of 1 to 3, and
l, m, and n are numbers which satisfy a ratio of 0.02 to 0.4:0.02 to 0.4:0.2 to 0.96 (l:m:n).

11. The composition of claim 10 , wherein in the composition, the vinyl siloxane including an alkyl group having a carbon number of 3 or less is present in an amount of 20 to 3,000 parts by weight with respect to 100 parts by weight of the vinyl siloxane including an alkyl group having a carbon number of 4 or more.

12. A composition comprising vinyl siloxane including an alkyl group having a carbon number of 4 or more and a quantum dot, wherein a surface of the quantum dot is subjected to surface treatment with an alkyl chain having a carbon number of 6 to 30.

13. A composition comprising vinyl siloxane including an alkyl group having a carbon number of 4 or more and a quantum dot,
wherein the composition further comprises a cross-linking agent and a catalyst,
wherein the cross-linking agent is represented by Chemical Formula 9:

in Chemical Formula 9,
Ra and Rb are independently hydrogen, an alkyl group having a carbon number of 1 to 4, or a phenyl group, and one or more of Ra and Rb are hydrogen,
R 1 to R 7 are independently an alkyl group having a carbon number of 1 to 4, or a phenyl group, and
a and b are numbers which satisfy 0.002 to 0.95:0.05 to 0.998 (a:b).

14. The composition of claim 13 , wherein the composition comprises 5 to 60 parts by weight of the cross-linking agent; and 0.01 to 0.5 part by weight of the catalyst, with respect to 100 parts by weight of the vinyl siloxane including an alkyl group having a carbon number of 4 or more.

15. A cured material of the composition of claim 1 .

16. The cured material of claim 15 , wherein the cured material is in a form of a film or a coating.

17. A device comprising the cured material of claim 15 .

18. The device of claim 17 , wherein the device is a lighting device, or a display device.

Assignees

• Lms Co Ltd
• Lms Co Ltd

Inventors

• Kwon Doo Hyo
• Choi Jeong Og
• Choi Myeon Choeon

Classifications

• C07F7/1804 Primary

  Compounds having Si-O-C linkages (Si-O-acyl linkages C07F7/1896) · CPC title

• C09K11/883

  with zinc or cadmium · CPC title

• C09K11/02

  Use of particular materials as binders, particle coatings or suspension media therefor · CPC title

• C09K11/025 Primary

  non-luminescent particle coatings or suspension media · CPC title

• H10H20/8511

  characterised by their material, e.g. binder · CPC title