Photosensitive resin composition and display device

Patent metadata

Field	Value
Publication number	US-9637683-B2
Application number	US-201514965217-A
Country	US
Kind code	B2
Filing date	Dec 10, 2015
Priority date	Jan 23, 2015
Publication date	May 2, 2017
Grant date	May 2, 2017

Abstract

A photosensitive resin composition comprising: a solvent in an amount of about 60 percentage by weight (wt %) to about 95 wt %; and a solid content in an amount of about 5 wt % to about 40 wt %, with respect to a total weight of the photosensitive resin composition, wherein the solid content comprises: a phosphor in an amount of about 5 wt % to about 90 wt %; a photopolymerizable compound in an amount of about 4 wt % to about 70 wt %; a photopolymerization initiator in an amount of about 0.1 wt % to about 20 wt %; an alkali soluble resin in an amount of about 5 wt % to about 80 wt %; and a dispersant in an amount of about 0.1 wt % to about 12 wt %, with respect to a total weight of the solid content.

First claim

What is claimed is:

1. A photosensitive resin composition comprising:
a solvent in an amount of about 60 percentage by weight (wt %) to about 95 wt %; and
a solid content in an amount of about 5 wt % to about 40 wt %, with respect to a total weight of the photosensitive resin composition,
wherein the solid content comprises:
a phosphor in an amount of about 5 wt % to about 90 wt %;
a photopolymerizable compound in an amount of about 4 wt % to about 70 wt %;
a photopolymerization initiator in an amount of about 0.1 wt % to about 20 wt %;
an alkali soluble resin in an amount of about 5 wt % to about 80 wt %; and
a dispersant in an amount of about 0.1 wt % to about 12 wt %, with respect to a total weight of the solid content, and
the phosphor has a particle size in a range of about 2 nanometers (nm) to about 10 nm, and when a center wavelength of light emitted from the phosphor is λ, an agglomerate particle size PS of the phosphor satisfies Formula 1:
λ/10< PS< 5λ  [Formula 1].

2. The photosensitive resin composition of claim 1 , wherein the phosphor comprises at least one selected from a red phosphor, a green phosphor, and a blue phosphor.

3. The photosensitive resin composition of claim 1 , wherein the phosphor comprises one of a red phosphor absorbing blue light to emit red light and a green phosphor absorbing blue light to emit green light.

4. The photosensitive resin composition of claim 1 , wherein the phosphor is a quantum dot (QD).

5. The photosensitive resin composition of claim 4 , wherein the quantum dot comprises at least one compound selected from the group consisting of CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, HgS, HgSe, HgTe, GaN, GaP, GaAs, InP, and InAs.

6. The photosensitive resin composition of claim 4 , wherein the quantum dot has a core-shell structure comprising a core and a shell covering the core,
wherein the core comprises at least one compound selected from the group consisting of CdSe, CdS, CdTe, ZnS, ZnSe, ZnTe, CdSeTe, CdZnS, CdSeS, PbSe, PbS, PbTe, AgInZnS, HgS, HgSe, HgTe, GaN, GaP, GaAs, InP, InZnP, InGaP, InGaN, InAs, and ZnO, and
the shell comprises at least one compound selected from the group consisting of CdS, CdSe, CdTe, CdO, ZnS, ZnSe, ZnTe, ZnO, InP, InS, GaP, GaN, GaO, InZnP, InGaP, InGaN, InZnSCdSe, PbS, TiO, SrSe, and HgSe.

7. The photosensitive resin composition of claim 1 , wherein the phosphor comprises at least one compound selected from the group consisting of Y 3 Al 5 O 12 :Ce 3+ (YAG:Ce), Tb 3 Al 5 O 12 :Ce 3+ (TAG:Ce), (Sr,Ba,Ca) 2 SiO 4 :Eu 2+ , (Sr,Ba,Ca,Mg,Zn) 2 Si(OD) 4 :Eu 2+ (D=F,Cl,S,N,Br), Ba 2 MgSi 2 O 7 :Eu 2+ , Ba 2 SiO 4 :Eu 2+ , Ca 3 (Sc,Mg) 2 Si3O 12 :Ce 3+ , (Ca,Sr)S:Eu 2+ , (Sr,Ca)Ga 2 S 4 :Eu 2+ , SrSi 2 O 2 N 2 :Eu 2+ , SiAlON:Ce 3+ , β-SiAlON:Eu 2+ , Ca-α-SiAlON:Eu 2+ , Ba 3 Si 6 O 12 N 2 :Eu 2+ , CaAlSiN 3 :Eu 2+ , (Sr,Ca)AlSiN 3 :Eu 2+ , Sr 2 Si 5 N 8 :Eu 2+ , (Sr,Ba)Al 2 O 4 :Eu 2+ , (Mg,Sr)Al 2 O 4 :Eu 2+ , and BaMg 2 Al 16 O 027 :Eu 2+ .

8. The photosensitive resin composition of claim 1 , wherein the photopolymerizable compound comprises a compound represented by Chemical Formula 1:

wherein R 1 is hydrogen or an acrylroyl group having 2 to 6 carbon atoms.

9. The photosensitive resin composition of claim 1 , wherein the alkali soluble resin comprises:
at least one compound selected from a mono carboxylic acid-based compound, a dicarboxylic acid-based compound, and a mono(meth)acrylate-based compound; and
at least one compound selected from an alkyl ester-based compound, a carboxylic acid ester-based compound, a vinyl compound, an alicyclic compound having an epoxy group and an unsaturated bond, an epoxy-based compound, and a dicarbonyl imide derivative.

10. The photosensitive resin composition of claim 1 , wherein the dispersant comprises at least a surfactant selected from a polyoxyethylenealkylether-based compound, a polyoxyethylenealkylphenylether-based compound, a polyethyleneglycolester-based compound, a sorbitan fatty acid ester-based compound, a fatty acid modified polyester-based compound, a tertiary amine modified polyurethane compound, an alkylammonium-based compound, and a polyethyleneimine-based compound.

11. A display device comprising:
a substrate; and
a plurality of color filters on the substrate,
wherein the color filter comprises a polymer resin, and a phosphor having a particle size in a range of about 2 nanometers (nm) to about 10 nm which is dispersed in the polymer resin, and
when a center wavelength emitted from the phosphor is λ, an agglomerate particle size PS of the phosphor satisfies Formula 1:
λ/10< PS< 5λ  [Formula 1].

12. The display device of claim 11 , wherein the phosphor comprises at least one selected from a red phosphor, a green phosphor, and a blue phosphor.

13. The display device of claim 11 , wherein the phosphor comprises one of a red phosphor absorbing blue light to emit red light and a green phosphor absorbing blue light to emit green light.

14. The display device of claim 11 , wherein the phosphor is a quantum dot (QD).

15. The display device of claim 14 , wherein the quantum dot comprises at least one compound selected from the group consisting of CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, HgS, HgSe, HgTe, GaN, GaP, GaAs, InP, and InAs.

16. The display device of claim 14 , wherein the quantum dot has a core-shell structure comprising a core and a shell covering the core,
wherein the core comprises at least one compound selected from the group consisting of CdSe, CdS, CdTe, ZnS, ZnSe, ZnTe, CdSeTe, CdZnS, CdSeS, PbSe, PbS, PbTe, AgInZnS, HgS, HgSe, HgTe, GaN, GaP, GaAs, InP, InZnP, InGaP, InGaN, InAs, and ZnO, and
the shell comprises at least one compound selected from the group consisting of CdS, CdSe, CdTe, CdO, ZnS, ZnSe, ZnTe, ZnO, InP, InS, GaP, GaN, GaO, InZnP, InGaP, InGaN, InZnSCdSe, PbS, TiO, SrSe, and HgSe.

17. The display device of claim 11 , wherein the phosphor comprises at least one compound selected from the group consisting of Y 3 Al 5 O 12 :Ce 3+ (YAG:Ce), Tb 3 Al 5 O 12 :Ce 3+ (TAG:Ce), (Sr,Ba,Ca) 2 SiO 4 :Eu 2+ , (Sr,Ba,Ca,Mg,Zn) 2 Si(OD)4:Eu 2+ (D=F,Cl,S,N,Br), Ba 2 MgSi 2 O 7 :Eu 2+ , Ba 2 SiO 4 :Eu 2+ , Ca 3 (Sc,Mg) 2 Si3O 12 :Ce 3+ , (Ca,Sr)S:Eu 2+ , (Sr,Ca)Ga 2 S 4 :Eu 2+ , SrSi 2 O 2 N 2 :Eu 2+ , SiAlON:Ce 3+ , β-SiAlON:Eu 2+ , Ca-α-SiAlON:Eu 2+ , Ba 3 Si 6 O 12 N 2 :Eu 2+ , CaAlSiN 3 :Eu 2+ , (Sr,Ca)AlSiN 3 :Eu 2+ , Sr 2 Si 5 N 8 :Eu 2+ , (Sr,Ba)Al 2 O 4 :Eu 2+ , (Mg,Sr)Al 2 O 4 :Eu 2+ , and BaMg2Al 16 O 27 :Eu 2+ .

Assignees

• Samsung Display Co Ltd
• Dongwoo Fine Chem Co Ltd
• Samsung Display Co Ltd

Inventors

• Lee Baekhee
• Nam Minki
• Kwon Junghyun
• Kim Youngmin
• Roh Namseok
• Park Haeil
• Yoon Seontae
• Kim Donguk
• Park Kisoo
• Lee Kwangkeun
• Lee Junhan
• Kim Juho
• Kim Hyounwoo
• Kim Hunsik
• Lee Jongsoo

Classifications

• G02B5/22

  Absorbing filters {(G02B5/201 - G02B5/208 take precedence)} · CPC title

• C09K11/02

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

• G02B5/201

  in the form of arrays · CPC title

• C09K11/883 Primary

  with zinc or cadmium · CPC title

• G03F7/027 Primary

  Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds (G03F7/075 takes precedence) · CPC title