INK COMPRISING ENCAPSULATED NANOPARTICLES

• US 20190002719A1
• Filed: 06/01/2018
• Published: 01/03/2019
• Est. Priority Date: 06/02/2017
• Status: Active Grant

• Current Assignee: Nexdot
• Original Assignee: Nexdot
• Inventors: POUSTHOMIS, Marc, D'AMICO, Michele, KUNTZMANN, Alexis, LIN, Yu-Pu, CAO, Edgar, FAIDEAU, Robin
• Granted Patent: US 10,822,510 B2
• Time in Patent Office: Days
• CPC Class Codes: B01J 13/043 Drying and spraying
• CPC Class Codes: B01J 13/14 Polymerisation; cross-linking
• CPC Class Codes: B01J 13/18 In situ polymerisation with all reactants being present in the same phase
• CPC Class Codes: B01J 13/22 Coating
• CPC Class Codes: B01J 19/06 Solidifying liquids making microcapsules B01J13/02
• CPC Class Codes: B01J 2/02 by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
• CPC Class Codes: B01J 2/04 in a gaseous medium if combined with suspending the material in a gas, e.g. fluidised beds B01J2/16
• CPC Class Codes: B01J 2/06 in a liquid medium
• CPC Class Codes: B82Y 20/00 Nanooptics, e.g. quantum optics or photonic crystals
• CPC Class Codes: B82Y 40/00 Manufacture or treatment of nanostructures
• CPC Class Codes: C01B 19/007 Tellurides or selenides of metals C01B19/002 takes precedence
• CPC Class Codes: C01B 33/12 Silica; Hydrates thereof, e.g. lepidoic silicic acid
• CPC Class Codes: C01F 7/30 Preparation of aluminium oxide or hydroxide by thermal decomposition or by hydrolysis or oxidation of aluminium compounds
• CPC Class Codes: C01G 11/006 Compounds containing, besides cadmium, two or more other elements, with the exception of oxygen or hydrogen
• CPC Class Codes: C01G 9/02 Oxides; Hydroxides
• CPC Class Codes: C01P 2004/04 obtained by TEM, STEM, STM or AFM
• CPC Class Codes: C01P 2004/24 Nanoplates, i.e. plate-like particles with a thickness from 1-100 nanometer
• CPC Class Codes: C01P 2004/32 Spheres
• CPC Class Codes: C01P 2004/80 Particles consisting of a mixture of two or more inorganic phases
• CPC Class Codes: C01P 2004/84 one phase coated with the other
• CPC Class Codes: C01P 2004/90 : Other morphology not specified above
• CPC Class Codes: C09D 11/033 : characterised by the solvent
• CPC Class Codes: C09D 11/037 : characterised by the pigment
• CPC Class Codes: C09D 11/322 : Pigment inks
• CPC Class Codes: C09D 11/36 : based on non-aqueous solvents
• CPC Class Codes: C09D 11/50 : Sympathetic, colour changing or similar inks
• CPC Class Codes: C09K 11/02 : Use of particular materials as binders, particle coatings or suspension media therefor
• CPC Class Codes: C09K 11/025 : non-luminescent particle coatings or suspension media
• CPC Class Codes: C09K 11/06 : containing organic luminescent materials
• CPC Class Codes: C09K 11/0883 : Arsenides; Nitrides; Phosphides
• CPC Class Codes: C09K 11/565 : with zinc cadmium
• CPC Class Codes: C09K 11/70 : containing phosphorus
• CPC Class Codes: C09K 11/703 : with zinc or cadmium
• CPC Class Codes: C09K 11/883 : with zinc or cadmium
• CPC Class Codes: C09K 2211/10 : Non-macromolecular compounds
• CPC Class Codes: H01L 2933/0041 : relating to wavelength conversion elements
• CPC Class Codes: H01L 33/502 : Wavelength conversion materials

Abstract

Disclosed is an ink including at least one particle including a first material; and at least one liquid vehicle; wherein the particle includes at least one particle including a second material and at least one nanoparticle dispersed in the second material; wherein the first material and the second material have an extinction coefficient less or equal to 15×10⁻⁵ at 460 nm. The invention also relates to inks, light emitting materials including at least one ink, patterns including at least one ink, particles deposited on a support, optoelectronic devices including at least one ink and method for depositing an ink on a support.

Claims

1. An ink comprising:

at least one particle (1) comprising a first material (11); and

at least one liquid vehicle;

wherein the particle (1) comprises at least one particle (2) comprising a second material (21) and at least one nanoparticle (3) dispersed in said second material (21);

wherein the first material (11) and the second material (21) have an extinction coefficient less or equal to 15×

10<sup>−

5</sup> at 460 nm;

or

at least one particle (2) comprising a plurality of nanoparticles (3) encapsulated in a material (21); and

at least one liquid vehicle;

wherein said particle (2) has a surface roughness less or equal to 5% of the largest dimension of said particle (2);

or

at least one phosphor nanoparticle; and

at least one liquid vehicle;

wherein the phosphor nanoparticle has a size ranging from 0.1 am to 50 am;

or

at least one particle (1) comprising a first material (11); and

at least one liquid vehicle;

wherein the particle (1) comprises at least one particle (2) comprising a second material (21) and at least one nanoparticle (3) dispersed in said second material (21);

wherein said particle (1) has a surface roughness less or equal to 5% of the largest dimension of said particle (1).

2. The ink according to claim 1, wherein the first material (11) limits or prevents the diffusion of outer molecular species or fluids (liquid or gas) into said first material (11).

3. The ink according to claim 1, wherein the first material (11) has a density ranging from 1 to 10.

4. The ink according to claim 1, wherein the first material (11) has a density superior or equal to the density of the second material (21).

5. The ink according to claim 1, wherein the first material (11) has a thermal conductivity at standard conditions of at least 0.1 W/(m·

K).

6. The ink according to claim 1, wherein the at least one nanoparticle (3) is a luminescent nanoparticle.

7. The ink according to claim 1, wherein the at least one nanoparticle (3) is a semiconductor nanocrystal.

8. The ink according to claim 1, wherein the at least one nanoparticle (3) is a semiconductor nanocrystal comprising a core comprising a material of formula M_xN_yE_zA_w, wherein:

M is selected from the group consisting of Zn, Cd, Hg, Cu, Ag, Au, Ni, Pd, Pt, Co, Fe, Ru, Os, Mn, Tc, Re, Cr, Mo, W, V, Nd, Ta, Ti, Zr, Hf, Be, Mg, Ca, Sr, Ba, Al, Ga, In, Tl, Si, Ge, Sn, Pb, As, Sb, Bi, Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Cs or a mixture thereof;

N is selected from the group consisting of Zn, Cd, Hg, Cu, Ag, Au, Ni, Pd, Pt, Co, Fe, Ru, Os, Mn, Tc, Re, Cr, Mo, W, V, Nd, Ta, Ti, Zr, Hf, Be, Mg, Ca, Sr, Ba, Al, Ga, In, Tl, Si, Ge, Sn, Pb, As, Sb, Bi, Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Cs or a mixture thereof;

E is selected from the group consisting of O, S, Se, Te, C, N, P, As, Sb, F, Cl, Br, I, or a mixture thereof;

A is selected from the group consisting of O, S, Se, Te, C, N, P, As, Sb, F, Cl, Br, I, or a mixture thereof; and

x, y, z and w are independently a decimal number from 0 to 5;

x, y, z and w are not simultaneously equal to 0;

x and y are not simultaneously equal to 0;

z and may not be simultaneously equal to 0.

9. The ink according to claim 1, wherein the at least one nanoparticle (3) is a semiconductor nanocrystal comprising at least one shell comprising a material of formula M_xN_yE_zA_w, wherein:

M is selected from the group consisting of Zn, Cd, Hg, Cu, Ag, Au, Ni, Pd, Pt, Co, Fe, Ru, Os, Mn, Tc, Re, Cr, Mo, W, V, Nd, Ta, Ti, Zr, Hf, Be, Mg, Ca, Sr, Ba, Al, Ga, In, Tl, Si, Ge, Sn, Pb, As, Sb, Bi, Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Cs or a mixture thereof;

N is selected from the group consisting of Zn, Cd, Hg, Cu, Ag, Au, Ni, Pd, Pt, Co, Fe, Ru, Os, Mn, Tc, Re, Cr, Mo, W, V, Nd, Ta, Ti, Zr, Hf, Be, Mg, Ca, Sr, Ba, Al, Ga, In, Tl, Si, Ge, Sn, Pb, As, Sb, Bi, Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Cs or a mixture thereof;

E is selected from the group consisting of O, S, Se, Te, C, N, P, As, Sb, F, Cl, Br, I, or a mixture thereof;

A is selected from the group consisting of O, S, Se, Te, C, N, P, As, Sb, F, Cl, Br, I, or a mixture thereof; and

x, y, z and w are independently a decimal number from 0 to 5;

x, y, z and w are not simultaneously equal to 0;

x and y are not simultaneously equal to 0;

z and w may not be simultaneously equal to 0.

10. The ink according to claim 1, wherein the at least one nanoparticle (3) is a semiconductor nanocrystal comprising at least one crown comprising a material of formula M_xN_yE_zA_w, wherein:

M is selected from the group consisting of Zn, Cd, Hg, Cu, Ag, Au, Ni, Pd, Pt, Co, Fe, Ru, Os, Mn, Tc, Re, Cr, Mo, W, V, Nd, Ta, Ti, Zr, Hf, Be, Mg, Ca, Sr, Ba, Al, Ga, In, Tl, Si, Ge, Sn, Pb, As, Sb, Bi, Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Cs or a mixture thereof;

N is selected from the group consisting of Zn, Cd, Hg, Cu, Ag, Au, Ni, Pd, Pt, Co, Fe, Ru, Os, Mn, Tc, Re, Cr, Mo, W, V, Nd, Ta, Ti, Zr, Hf, Be, Mg, Ca, Sr, Ba, Al, Ga, In, Tl, Si, Ge, Sn, Pb, As, Sb, Bi, Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Cs or a mixture thereof;

E is selected from the group consisting of O, S, Se, Te, C, N, P, As, Sb, F, Cl, Br, I, or a mixture thereof;

A is selected from the group consisting of O, S, Se, Te, C, N, P, As, Sb, F, Cl, Br, I, or a mixture thereof; and

x, y, z and w are independently a decimal number from 0 to 5;

x, y, z and w are not simultaneously equal to 0;

x and y are not simultaneously equal to 0;

z and w may not be simultaneously equal to 0.

11. The ink according to claim 1, wherein the at least one nanoparticle (3) is a semiconductor nanoplatelet.

12. The ink according to claim 1, wherein the at least one liquid vehicle comprises a liquid including but not limited to:

1-methoxy-2-propanol, 2-pyrrolidinone, C4 to C8 1,2-alkanediol, aliphatic or alicycle ketone, methyl ethyl ketone, C1-C4 alkanol such as for example methanol, ethanol, methanol propanol, or isopropanol, ketones, esters, ether of ethylene glycol or propylene glycol, acetals, acrylic resin, polyvinyl acetate, polyvinyl alcohol, polyamide resin, polyurethane resin, epoxy resin, alkyd ester, nitrated cellulose, ethyl cellulose, sodium carboxymethyl cellulose, alkyds, maleics, cellulose derivatives, formaldehyde, rubber resin, phenolics, propyl acetate, glycol ether, aliphatic hydrocarbon, acetate, ester. acrylic, cellulose ester, nitrocellulose, modified resin, alkoxylated alcohol, 2-pyrrolidone, a homolog of 2-pyrrolidone, glycol, water, or a mixture thereof.

13. The ink according to claim 1, wherein the at least one phosphor nanoparticle comprises a material including but not limited to:

blue phosphors;

red phosphors;

orange phosphors;

green phosphors; and

yellow phosphors.

14. A pattern comprising at least one ink according to claim 1 deposited by inkjet printing on a support.

15. A pattern comprising at least one ink according to claim 1 deposited by inkjet printing on a LED chip or microsized LED.

18. An optoelectronic device comprising at least one ink according to claim 1.

19. A method for depositing an ink according to claim 1 on a support comprising:

printing the ink on a support using inkjet printing; and

evaporating the solvent and/or the liquid vehicle.

16. A particle (1) deposited on a support by inkjet printing;

wherein the particle (1) comprises;

a first material (11), and at least one particle (2) comprising a second material (21) and at least one nanoparticle (3) dispersed in said second material (21); and

wherein the first material (11) and the second material (21) have an extinction coefficient less or equal to 15×

10<sup>−

5</sup> at 460 nm;

or

a first material (11), and at least one particle (2) comprising a second material (21) and at least one nanoparticle (3) dispersed in said second material (21); and

wherein said particle (1) has a surface roughness less or equal to 5% of the largest dimension of said particle (1).

17. A particle (2) deposited on a support by inkjet printing;

wherein said particle (2) comprises a plurality of nanoparticles (3) encapsulated in a material (21); and

wherein said particle (2) has a surface roughness less or equal to 5% of the largest dimension of said particle (2).