KR101815344B1 - Light-emitting film - Google Patents

Abstract

The present application relates to a light-emitting film, a manufacturing method thereof, a lighting device, and a display device. The present application can provide a luminescent film capable of providing an illumination device having excellent color purity and efficiency and excellent color characteristics. The luminescent film of the present application can stably maintain such excellent properties for a long period of time. The luminescent film of the present application can be used for various applications including various lighting devices as well as photovoltaic applications, optical filters or optical converters.

Description

LIGHT-EMITTING FILM

The present application relates to a light-emitting film, a manufacturing method thereof, a lighting device, and a display device.

Lighting devices are used in a variety of applications. The lighting device may be, for example, a BLU of a display such as a liquid crystal display (LCD), a television, a computer, a mobile phone, a smart phone, a personal digital assistant (PDA), a gaming device, an electronic reading device, (Backlight Unit). In addition, the lighting device can be used for indoor or outdoor lighting, stage lighting, decorative lighting, accent lighting or museum lighting, and the like, and can also be used for horticulture or special wavelength lighting required for biology.

As a typical lighting device, for example, there is a device which is used as an LCD BLU or the like and which emits a white light by combining a phosphor such as a blue LED (Light Emitting Diode) and YAG (Yttrium aluminum garnet).

Korean Patent Publication No. 2011-0048397 Korean Patent Publication No. 2011-0038191

The present application provides a light emitting film, a method of manufacturing the same, a lighting device, and a display device.

This application is directed to a luminescent film. The term luminescent film in the present application may mean a film formed to emit light. For example, the luminescent film may absorb light of a predetermined wavelength and emit light of the same or different wavelength as the absorbed light Or the like.

The light emitting film may include a light emitting layer. In one example, the light emitting layer may include two regions that are phase-separated from each other. In the present application, it is to be understood that the regions that are termed phase separation are separated from each other as regions formed by two regions that do not intermingle with each other, such as regions that are relatively hydrophobic and regions that are relatively hydrophilic May refer to formed regions. Hereinafter, for convenience of explanation, any one of the two regions of the light-emitting layer that are phase-separated may be referred to as a first region, and the other region may be referred to as a second region.

The light emitting layer may further include nanoparticles, specifically, nanoparticles having different refractive indexes from the first and second regions. Such nanoparticles may be, for example, amphipathic nanoparticles described below.

In one example, the first region among the first region and the second region of the light emitting layer may be a hydrophilic region, and the second region may be a hydrophobic region. In the present application, hydrophilicity and hydrophobicity for distinguishing the first and second regions are relative to each other. An absolute criterion for hydrophilicity and hydrophobicity is that the two regions are distinguished from each other in the light-emitting layer, It is not.

The light emitting layer may include light emitting nanoparticles. The term light emitting nanoparticle in the present application may mean nanoparticles capable of emitting light. For example, the light emitting nanoparticles may be nanoparticles that absorb light of a predetermined wavelength and emit light having the same or different wavelengths as the absorbed light. The term nanoparticle in the present application is a particle having a nanoscale dimension, for example, an average particle size of about 100 nm or less, 90 nm or less, 80 nm or less, 70 nm or less, 60 nm or less, 50 nm or less, 40 nm or less, 30 nm or less, 20 nm or less, or 15 nm or less. The shape of the nanoparticles is not particularly limited, and may be spherical, ellipsoidal, polygonal or amorphous.

In the light emitting layer, the light emitting nanoparticles may be included in the first region or the second region. In one example, the light emitting nanoparticles may be contained in only one of the first and second regions, and may not be substantially contained in the other regions. The fact that the light emitting nanoparticles are not contained in any region in the present application means that the weight percentage of the light emitting nanoparticles contained in the region is 10% or less based on the total weight of the light emitting nanoparticles contained in the light emitting layer , 9%, 8%, 7%, 6%, 5%, 4%, 3%, 2%, 1%, 0.5%, or 0.1% .

By forming two regions that are phase-separated in the light emitting layer and locating the light emitting nanoparticles substantially in only one of the two regions, it is possible to secure physical properties suitable for film formation, It is advantageous to secure adhesion between the layer and the light emitting layer, and it is possible to more effectively control other factors that may adversely affect physical properties of the nanoparticle such as an initiator and a crosslinking agent in a region where the light emitting nanoparticles exist in the formation of the light emitting film, This excellent film can be formed.

The ratio of the hydrophilic first region to the hydrophobic second region in the light emitting layer is not particularly limited. For example, the ratio can be selected in consideration of the ratio of the luminescent nanoparticles to be included in the light emitting layer, the adhesion with other layers such as the barrier layer, or the physical properties required for film formation. For example, the light emitting layer may include a second region of from 10 parts by weight to 100 parts by weight based on 100 parts by weight of the first region. In another example, the light emitting layer may include 50 to 95 parts by weight of the first region and 5 to 50 parts by weight of the second region. Alternatively, the light-emitting layer may include 50 to 95 parts by weight of the second region and 5 to 50 parts by weight of the first region. The term "parts by weight" in this application means the weight ratio between the components unless otherwise specified. In the above, the weights of the first and second regions may be the sum of the weights of all the components included in the regions. For example, the light-emitting layer can be formed by mixing and polymerizing a hydrophilic polymerizable composition with a hydrophilic polymerizable composition as described later. In this case, the weight of each of the above regions is the weight of each polymerizable composition Or the ratio between the hydrophilic radical polymerizing compound and the hydrophobic radical polymerizing compound contained in each composition.

In the above, the hydrophilic polymerizable composition refers to a composition comprising a hydrophilic radical polymerizable compound, and the hydrophobic polymerizable composition may refer to a composition comprising a hydrophobic radical polymerizable compound. In the present application, the criterion for distinguishing the hydrophilicity and hydrophobicity of the hydrophilic radical polymerizing compound from the hydrophobic radical polymerizing compound is that, for example, when the two compounds are relatively hydrophilic or hydrophobic and mixed with each other, Is not particularly limited so far as it can form a film. In one example, the distinction between hydrophilicity and hydrophobicity can be performed by a so-called solubility parameter. The solubility parameter in the present application refers to the solubility parameter of a homopolymer formed by polymerization of the corresponding radically polymerizable compound, thereby determining the degree of hydrophilicity and hydrophobicity of the compound. The manner of obtaining the solubility parameter is not particularly limited and may be in accordance with a method known in the art. For example, the parameter may be calculated or obtained according to a method known in the art as a so-called Hansen solubility parameter (HSP). The hydrophobic radically polymerizable compound in the present application may mean a radically polymerizable compound having a solubility parameter of less than about 10 and the hydrophilic radically polymerizable compound means a radically polymerizable compound having a parameter of about 10 or more can do.

The first region can be formed by polymerizing the above-mentioned hydrophilic radical polymerizing compound. For example, the first region may comprise a compound of Formula 1, a compound of Formula 2, a compound of Formula 3, a compound of Formula 4, a nitrogen-containing radically polymerizable compound, acrylic acid, methacrylic acid, Polymerized units of a radically polymerizable compound. In the present application, the term "polymerized unit" of a given compound may mean a unit formed by polymerization of a given compound.

[Chemical Formula 1]

In Formula (1), Q is hydrogen or an alkyl group, U is an alkylene group, Z is hydrogen, an alkoxy group, an epoxy group or a monovalent hydrocarbon group, and m is an arbitrary number.

(2)

In the general formula (2), Q is hydrogen or an alkyl group, U is an alkylene group, and m is an arbitrary number.

(3)

In Formula (3), Q is hydrogen or an alkyl group, A is an alkylene group in which a hydroxyl group may be substituted, and U is an alkylene group.

[Chemical Formula 4]

In Formula 4, Q is hydrogen or an alkyl group, A and U are each independently an alkylene group, and X is a hydroxyl group or a cyano group.

The term "alkylene group" in the present application may mean an alkylene group having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms, or 1 to 4 carbon atoms unless otherwise specified. The alkylene group may be linear, branched or cyclic. The alkylene group may optionally be substituted with one or more substituents.

The term " epoxy group " in the present application means, unless otherwise specified, a cyclic ether having three ring constituting atoms or a compound containing such a cyclic ether or a monovalent residue derived therefrom have. As the epoxy group, a glycidyl group, an epoxy alkyl group, a glycidoxyalkyl group or an alicyclic epoxy group can be exemplified. The alicyclic epoxy group may be a monovalent residue derived from a compound containing a structure containing an aliphatic hydrocarbon ring structure and having a structure in which two carbon atoms forming the aliphatic hydrocarbon ring also form an epoxy group. As the alicyclic epoxy group, an alicyclic epoxy group having 6 to 12 carbon atoms can be exemplified, and for example, 3,4-epoxycyclohexylethyl group and the like can be exemplified.

The term "alkoxy group" in the present application may mean an alkoxy group having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms or 1 to 4 carbon atoms, unless otherwise specified. The alkoxy group may be linear, branched or cyclic. In addition, the alkoxy group may be optionally substituted with one or more substituents.

The term "alkyl group" in the present application may mean an alkyl group having 1 to 20 carbon atoms, 1 to 16 carbon atoms, 1 to 12 carbon atoms, 1 to 8 carbon atoms or 1 to 4 carbon atoms, unless otherwise specified. The alkyl group may be linear, branched or cyclic. In addition, the alkyl group may be optionally substituted with one or more substituents.

Unless otherwise specified, the term " monovalent hydrocarbon group " in the present application may mean a monovalent residue derived from a compound consisting of carbon and hydrogen or a derivative of such a compound. For example, the monovalent hydrocarbon group may contain from 1 to 25 carbon atoms. As the monovalent hydrocarbon group, an alkyl group, an alkenyl group, an alkynyl group or an aryl group can be exemplified.

The term "alkenyl group" in the present application may mean an alkenyl group having 2 to 20 carbon atoms, 2 to 16 carbon atoms, 2 to 12 carbon atoms, 2 to 8 carbon atoms or 2 to 4 carbon atoms unless otherwise specified. The alkenyl group may be linear, branched or cyclic and may optionally be substituted with one or more substituents.

The term "alkynyl group" in the present application may mean an alkynyl group having 2 to 20 carbon atoms, 2 to 16 carbon atoms, 2 to 12 carbon atoms, 2 to 8 carbon atoms, or 2 to 4 carbon atoms unless otherwise specified. The alkynyl group may be linear, branched or cyclic and may optionally be substituted with one or more substituents.

The term " aryl group " in the present application may mean a monovalent residue derived from a compound or derivative containing a benzene ring or a structure in which two or more benzene rings are condensed or bonded, unless otherwise specified. The range of the aryl group may include a so-called aralkyl group or an arylalkyl group as well as a functional group ordinarily called an aryl group. The aryl group may be, for example, an aryl group having 6 to 25 carbon atoms, 6 to 21 carbon atoms, 6 to 18 carbon atoms, or 6 to 12 carbon atoms. Examples of the aryl group include a phenyl group, a phenoxy group, a phenoxyphenyl group, a phenoxybenzyl group, a dichlorophenyl group, a chlorophenyl group, a phenylethyl group, a phenylpropyl group, a benzyl group, a tolyl group, a xylyl group, .

Examples of the substituent which may optionally be substituted in the alkoxy group, alkylene group, epoxy group or monovalent hydrocarbon group in the present application include halogen such as chlorine or fluorine, glycidyl group, epoxyalkyl group, glycidoxyalkyl group or alicyclic epoxy group An acryloyl group, a methacryloyl group, an isocyanate group, a thiol group or a monovalent hydrocarbon group, but the present invention is not limited thereto.

In the general formulas (1), (2) and (4), m and n are arbitrary numbers and can be, for example, independently in the range of 1 to 20, 1 to 16 or 1 to 12.

Examples of the nitrogen-containing radical polymerizable compound include an amide group-containing radical polymerizing compound, an amino group-containing radical polymerizing compound, an imide group-containing radical polymerizing compound, or a cyano group-containing radical polymerizing compound Etc. may be used. Examples of the amide group-containing radical polymerizable compound include (meth) acrylamide or N, N-dimethyl (meth) acrylamide, N, (Meth) acrylamide, N, N'-methylenebis (meth) acrylamide, N, N-dimethylaminopropyl (meth) acrylamide, Acrylamide, N, N-dimethylaminopropyl methacrylamide, N-vinylpyrrolidone, N-vinylcaprolactam or (meth) acryloylmorpholine, and the amino group-containing radical polymerizable compound (Meth) acrylate, N, N-dimethylaminoethyl (meth) acrylate or N, N-dimethylaminopropyl (meth) acrylate. Examples of the imide group-containing radical polymerizing compound , N-isopropylmaleimide, N- It is not, but containing radical polymerizable As the compound, can be as acrylonitrile or methacrylonitrile illustrating the like nitrile, limited-claw-hexyl maleimide or itaconimide, etc. can be exemplified, a cyano group.

Examples of the radically polymerizable compound having a salt moiety include salts of acrylic acid or methacrylic acid with an alkali metal such as lithium, sodium and potassium, Magnesium, calcium, strontium and salts with alkaline earth metals including barium, and the like, but the present invention is not limited thereto.

The first region can be formed, for example, by polymerizing a hydrophilic polymerizable composition comprising a hydrophilic radical polymerizable compound and a radical initiator. Therefore, the first region may be a polymer of the hydrophilic polymerizable composition.

The kind of the radical initiator contained in the hydrophilic polymerizable composition is not particularly limited. As the initiator, a radical thermal initiator or photoinitiator capable of generating a radical capable of initiating a polymerization reaction by application of heat or irradiation of light can be used.

Azobis-2,4-dimethylvaleronitrile (V-65, manufactured by Wako), 2,2-azobisisobutyronitrile (V- 60, Wako) or 2,2-azobis-2-methylbutyronitrile (V-59, Wako); (Peroyl NPP, NOF), diisopropyl peroxydicarbonate (Peroyl IPP, NOF), bis-4-butylcyclohexyl peroxydicarbonate (Peroyl TCP, NOF (Peroyl EEP, NOF), diethoxyhexyl peroxydicarbonate (peroyl OPP, NOF), hexyl peroxydicarbonate (Perhexyl ND, NOF), diethoxyethyl peroxydicarbonate ), Dimethoxybutylperoxy dicarbonate (Peroyl MBP, NOF), bis (3-methoxy-3-methoxybutyl) peroxy dicarbonate (Peroyl SOP, NOF), hexyl peroxypivalate (Perflux, NOF), trimethylhexanoyl peroxide (Peroyl 355, NOF), amyl peroxypivalate (Luperox 546M75, Atofina), butyl peroxypivalate (Peroxy compound); (Luperox 610M75, Atofina), amyl peroxyneodecanoate (Luperox 546M75, Atofina) or butyl peroxyneodecanoate (Luperox 10M75, available from Atofina Peroxy dicarbonate compounds such as a)); Acyl peroxides such as 3,5,5-trimethylhexanoyl peroxide, lauryl peroxide or dibenzoyl peroxide; Ketone peroxide; Dialkyl peroxides; Peroxyketals; Or a peroxide initiator such as hydroperoxide, etc., can be used. As the photoinitiator, benzoin, hydroxy ketone, amino ketone or phosphine oxide photoinitiators can be used. Specifically, Benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin n-butyl ether, benzoin isobutyl ether, acetophenone, dimethyl anino acetophenone, 2,2-dimethoxy- 2-methyl-1-phenylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1 (4-methylthio) phenyl] -2-morpholino-propan-1-one, 4- - phenylbenzophenone, 4,4'-diethylaminobenzophenone, dichlorobenzophenone, 2-methyl anthraquinone, 2-ethyl anthraquinone, 2-t-butyl anthraquinone , 2-aminoanthraquinone, thioxanthone, 2-ethylthioxanthone, 2-chlorothioxanthone, 2,4-dimethylthioxanthone, 2,4-diethylthioxanthone, benzyldimethylketal, (2-hydroxy-2-methyl-1- [4- (1-methylvinyl) phenyl] propanone] and 2,4,6-trimethylbenzoyl-diphenyl - phosphine oxide, and the like can be used, but the present invention is not limited thereto.

As the initiator, for example, a hydroxyketone compound, a water-dispersible hydroxyketone compound, an amino ketone compound, or an aqueous dispersion amino ketone compound may be used as the initiator, which exhibits high solubility in the hydrophilic component of the initiator , But is not limited thereto.

The hydrophilic polymerizable composition may contain, for example, a radical initiator at a concentration of about 0.1% by weight to 10% by weight. Such a ratio can be changed, for example, in consideration of the physical properties and polymerization efficiency of the film.

For example, considering the film property and the like, if necessary, the hydrophilic polymerizable composition may further include a crosslinking agent. As the crosslinking agent, for example, a compound having two or more radically polymerizable groups can be used.

As the compound which can be used as a crosslinking agent, a polyfunctional acrylate can be exemplified. The polyfunctional acrylate may mean a compound containing two or more acryloyl groups or methacryloyl groups.

Examples of the polyfunctional acrylate include 1,4-butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, polyethylene glycol di (Meth) acrylate, neopentylglycol adipate di (meth) acrylate, hydroxyl puivalic acid neopentyl glycol di (meth) acrylate, dicyclopentanyl di (meth) Acrylate, caprolactone modified dicyclopentenyl di (meth) acrylate, ethylene oxide modified di (meth) acrylate, di (meth) acryloxy ethyl isocyanurate, allyl cyclohexyl di ) Acrylate, tricyclodecane dimethanol (meth) acrylate, dimethylol dicyclopentanedi (meth) acrylate, ethylene oxide modified hexahydrophthalic acid di (meth) acrylate, tricyclo (Meth) acrylate, neopentyl glycol-modified trimethylpropane di (meth) acrylate, adamantane di (meth) acrylate or 9,9-bis [4- Ethoxy) phenyl] fluorene and the like; (Meth) acrylates such as trimethylolpropane tri (meth) acrylate, dipentaerythritol tri (meth) acrylate, propionic acid modified dipentaerythritol tri (meth) acrylate, pentaerythritol tri Trifunctional acrylates such as modified trimethylolpropane tri (meth) acrylate, trifunctional urethane (meth) acrylate or tris (meth) acryloxyethylisocyanurate; Tetrafunctional acrylates such as diglycerin tetra (meth) acrylate or pentaerythritol tetra (meth) acrylate; Pentafunctional acrylates such as propionic acid-modified dipentaerythritol penta (meth) acrylate; And dipentaerythritol hexa (meth) acrylate, caprolactone-modified dipentaerythritol hexa (meth) acrylate or urethane (meth) acrylate (e.g., an isocyanate monomer and trimethylolpropane tri Hexafunctional acrylates such as acrylate, hexamethyldisiloxane, hexamethyldisiloxane, hexamethyldisiloxane, hexamethyldisiloxane, hexamethyldisiloxane, hexamethyldisiloxane, hexamethyldisiloxane, and reaction product. Acrylate and the like can be also used. Of these compounds, one kind or more than one kind may be selected appropriately.

As the crosslinking agent, crosslinking agents such as the above-mentioned polyfunctional acrylates can be crosslinked by a thermal curing reaction such as known isocyanate crosslinking agents, epoxy crosslinking agents, aziridine crosslinking agents or metal chelate crosslinking agents, A component capable of implementing the structure may also be used.

The crosslinking agent may be contained, for example, in the hydrophilic polymerizable composition at a concentration of 50% by weight or less or 10% by weight to 50% by weight. The ratio of the cross-linking agent can be changed in consideration of, for example, physical properties of the film.

The hydrophilic polymerizable composition may further include other necessary components in addition to the above-described components. The method of forming the first region using the hydrophilic polymerizable composition will be described later.

The second region can also be formed by polymerizing a radically polymerizable compound. For example, the second region can be formed by polymerizing the hydrophobic radically polymerizable compound. The radically polymerizable compound capable of forming the second region is not particularly limited. For example, the second region may include a polymerized unit of a compound represented by the following formula (5).

[Chemical Formula 5]

In Formula (5), Q is hydrogen or an alkyl group, and B is a linear or branched alkyl group or alicyclic hydrocarbon group having 5 or more carbon atoms.

[Chemical Formula 6]

In Formula (6), Q is hydrogen or an alkyl group, and U is alkylene, alkenylene or alkynylene or arylene group.

(7)

Y is a carbon atom, an oxygen atom or a sulfur atom, X is an oxygen atom, a sulfur atom or an alkylene group, Ar is an aryl group, and n is an arbitrary Number.

The term alkenylene group or alkynylene group in the present application means an alkenylene group or alkynylene group having 2 to 20 carbon atoms, 2 to 16 carbon atoms, 2 to 12 carbon atoms, 2 to 8 carbon atoms, or 2 to 4 carbon atoms, It can mean a group. The alkenylene group or alkynylene group may be linear, branched or cyclic. In addition, the alkenylene or alkynylene group may be optionally substituted with one or more substituents.

The term " arylene group " in the present application may mean a divalent moiety derived from a compound or derivative thereof containing a structure in which benzene or two or more benzenes are condensed or bonded, unless otherwise specified. The arylene group may have a structure including, for example, benzene, naphthalene or fluorene.

In Formula (5), B may be a linear or branched alkyl group having 5 or more carbon atoms, 7 or more carbon atoms, or 9 or more carbon atoms. Such relatively long chain alkyl group containing compounds are known to be relatively nonpolar compounds. The upper limit of the number of carbon atoms of the linear or branched alkyl group is not particularly limited. For example, the alkyl group may be an alkyl group having 20 or less carbon atoms.

In another embodiment, B may be an alicyclic hydrocarbon group, for example, an alicyclic hydrocarbon group having 3 to 20 carbon atoms, 3 to 16 carbon atoms, or 6 to 12 carbon atoms. Examples of such hydrocarbon groups include cyclohexyl group or iso Boronyl group and the like can be exemplified. The compound having an alicyclic hydrocarbon group is known as a relatively nonpolar compound.

In formula (7), n is an arbitrary number and can be, for example, independently within the range of 1 to 20, 1 to 16, or 1 to 12, respectively.

The second region can be formed, for example, by polymerizing a hydrophobic polymerizable composition comprising a hydrophobic radical polymerizing compound and a radical initiator. Accordingly, the second region may be a polymer of the hydrophobic polymerizable composition.

The kind of the radical initiator contained in the hydrophobic polymerizable composition is not particularly limited. For example, an appropriate type of initiator described in the item of hydrophilic polymerizable compound described above can be selected and used.

The hydrophobic polymerizable composition may contain, for example, a radical initiator in a concentration of 5% by weight or less. Such a concentration can be changed in consideration of, for example, the physical properties and polymerization efficiency of the film.

Considering film properties and the like, if necessary, the hydrophobic polymerizable composition may further include a crosslinking agent. As the crosslinking agent, for example, suitable components may be selected from among the components described in the item of the hydrophilic polymerizable composition without any particular limitation.

The crosslinking agent may be contained in the hydrophobic polymerizable composition at a concentration of, for example, 50% by weight or less, or 10 to 50% by weight. The concentration of the crosslinking agent can be changed in consideration of, for example, the physical properties of the film and the influence on other components contained in the polymerizable compound.

The hydrophobic polymerizable composition may further include other components if necessary. The method of forming the second region using the hydrophobic polymerizable composition will be described later.

The light emitting layer includes light emitting nanoparticles. As described above, the light emitting nanoparticles may be particles capable of absorbing light of a predetermined wavelength and emitting light of the same or different wavelengths. For example, the luminescent nanoparticles can be called nanoparticles (hereinafter, referred to as green particles) capable of absorbing light of any wavelength within a range of 450 to 490 nm and emitting light of a wavelength within a range of 490 to 580 nm ) And / or nanoparticles (hereinafter, referred to as red particles) capable of absorbing light of any wavelength within the range of 450 to 490 nm and emitting light of any wavelength within the range of 600 to 780 nm . For example, in order to obtain a light emitting film capable of emitting white light, the red particles and the green particles may be included in the light emitting layer together at an appropriate ratio. The light emitting nanoparticles can be used without any particular limitation as long as they exhibit such action. Representative examples of such nanoparticles include, but are not limited to, nanostructures called so-called quantum dots.

The nanostructures may be in the form of particles, for example, nanowires, nanorods, nanotubes, branched nanostructures, nanotetrapods, tripods, Or bipods, and such forms may also be included in the nanoparticles defined in the present application. The term nanostructures in the present application includes at least one region having dimensions of less than about 500 nm, less than about 200 nm, less than about 100 nm, less than about 50 nm, less than about 20 nm, or less than about 10 nm, Structures. In general, region or characteristic dimensions may exist along the smallest axis of the structure, but are not limited thereto. The nanostructure may be, for example, substantially crystalline, substantially monocrystalline, polycrystalline or amorphous, or a combination of the foregoing.

Quantum dots that can be used as the light emitting nanoparticles can be prepared in any known manner. For example, suitable methods for forming quantum dots are disclosed in U.S. Patent Nos. 6,225,198, 2002-0066401, 6,207,229, 6,322,901, 6,949,206, 7,572,393 , U.S. Patent No. 7,267,865, U.S. Patent No. 7,374,807, U.S. Patent No. 6,861,155, and the like, and various other known methods can be applied to the present invention.

Quantum dots or other nanoparticles that may be used in the present application may be formed using any suitable material, for example, an inorganic material, using an inorganic conducting or semi-conducting material. Suitable semiconductor materials include II-VI, III-V, IV-VI, and IV semiconductors. More specifically, it is possible to use Si, Ge, Sn, Se, Te, B, C (including diamond), P, BN, BP, BAs, AlN, AlP, AlAs, AlSb, GaN, GaP, GaAs, GaSb, InN, InP, ZnSe, ZnTe, CdS, CdSe, CdSeZn, CdTe, HgS, HgSe, HgTe, BeS, BeSe, BeTe, MgS, InS, InSb, AlN, AlP, AlAs, AlSb, GaN, GaP, GaAs, GaSb, ZnO, ZnS, MgSe, GeS, GeSe, GeTe, SnS, SnSe, SnTe, PbO, PbS, PbSe, PbTe, CuF, CuCl, CuBr, CuI, Si 3 N 4, Ge 3 N 4, Al 2 O 3, (Al, Ga, In ₂ (S, Se, Te) ₃ , Al ₂ CO and two or more of these semiconductors may be exemplified, but are not limited thereto.

In one example, the semiconductor nanocrystals or other nanostructures may comprise a dopant such as a p-type dopant or an n-type dopant. The nanoparticles that may be used in the present application may also include II-VI or III-V semiconductors. Examples of II-VI or III-V semiconductor nanocrystals and nanostructures include any combination of elements in the Periodic Table Group II elements such as Zn, Cd, and Hg, and periodic Table VI elements such as S, Se, Te, Po, And Group V elements such as B, Al, Ga, In, and Tl and Group V elements such as N, P, As, Sb and Bi, but are not limited thereto. Suitable inorganic nanostructures in other examples include metal nanostructures and suitable metals include Ru, Pd, Pt, Ni, W, Ta, Co, Mo, Ir, Re, Rh, Hf, Nb, , Sn, Zn, Fe, or FePt, but the present invention is not limited thereto.

The light emitting nanoparticles, for example, quantum dots, may have a core-shell structure. Exemplary materials that can form the core nanoparticles include Si, Ge, Sn, Se, Te, B, C (including diamond), P, Co, Au, BN, BP, BAs, AlN, ZnS, ZnSe, ZnTe, CdSe, CdSeZn, AlS, AlSb, GaN, GaP, GaAs, GaSb, InN, InP, InAs, InSb, AlN, AlP, AlAs, AlSb, GaN, GaP, , CdTe, HgS, HgSe, HgTe , BeS, BeSe, BeTe, MgS, MgSe, GeS, GeSe, GeTe, SnS, SnSe, SnTe, PbO, PbS, PbSe, PbTe, CuF, CuCl, CuBr, CuI, Si 3 N ₄ , Ge ₃ N ₄ , Al ₂ O ₃ , (Al, Ga, In) ₂ (S, Se, Te) ₃ , Al ₂ CO and any combination of two or more of these materials. no. Exemplary core-cell luminescent nanoparticles (cores / cells) applicable in the present application include, but are not limited to, CdSe / ZnS, InP / ZnS, PbSe / PbS, CdSe / CdS, CdTe / CdS or CdTe / It is not.

The specific kind of the light-emitting nanoparticles is not particularly limited and may be appropriately selected in consideration of the desired light emission characteristics.

In one example, the emitting nanoparticles, such as quantum dots, may be surrounded by one or more ligands or barriers. The ligand or barrier may be advantageous for improving the stability of light emitting nanoparticles such as quantum dots and for protecting luminescent nanoparticles from harmful external conditions including high temperature, high intensity, external gas or moisture. As described later, the luminescent nanoparticles may exist only in one of the first region and the second region. In order to obtain such a luminescent layer, the ligand or barrier has a characteristic of either of the first and second regions It may be selected to have compatibility with only one region.

In one example, a light emitting nanoparticle, such as a quantum dot, may comprise a ligand conjugated, cooperated, associated, or attached to its surface. A ligand capable of exhibiting properties suitable for the surface of a light emitting nanoparticle such as a quantum dot and a method for forming the ligand are known, and such a method can be applied without limitation in the present application. Such materials and methods are disclosed, for example, in U.S. Patent Publication No. 2008-0281010, U.S. Patent Publication No. 2008-0237540, U.S. Patent Publication No. 2010-0110728, U.S. Patent Application No. 2008-0118755, U.S. Patent No. 7,645,397 U.S. Patent No. 7,374,807, U.S. Patent No. 6,949,206, U.S. Patent No. 7,572,393, U.S. Patent No. 7,267,875, and the like, but are not limited thereto. In one example, the ligand may be a molecule having an amine group (oleylamine, triethylamine, hexylamine, naphtylamine, etc.) or a polymer, a molecule having a carboxyl group (oleic acid or the like), a polymer having a thiol group (butanethiol, hexanethiol, dodecanethiol, etc.) A molecule having a phosphine group (e.g., triphenylphosphine), a molecule having an oxidized phosphine group (such as trioctylphosphine oxide), a molecule having a carbonyl group (such as alkyl ketone), a polymer having a benzene ring (Benzene, styrene, etc.) or a polymer, a molecule having a hydroxyl group (butanol, hexanol, etc.), or a polymer.

The light emitting nanoparticles may be included in the light emitting layer, for example, in the first or second region. In one example, the light emitting nanoparticles may be contained in only one of the first and second regions, but not in the other regions. As described above, the region where the light emitting nanoparticles are not present is a region substantially not containing the light emitting nanoparticles, and the weight ratio of the light emitting nanoparticles in the region is 10% Or less, 8% or less, 6% or less, 4% or less, 2% or less, 1% or less or 0.5% or less.

The ratio of the light emitting nanoparticles in the light emitting layer is not particularly limited, and can be selected in an appropriate range in consideration of, for example, desired optical characteristics. In one example, the luminescent nanoparticles may be present in the luminescent layer at a concentration of from 0.05% to 20% by weight, but are not limited thereto.

The light emitting layer may contain other components in addition to the above-mentioned components. Examples of other components that the luminescent layer can include, but are not limited to, amphipathic nanoparticles and scattering particles described below.

In one example, the emissive layer may comprise amphiphilic nanoparticles, which may be at the boundary of the first and second regions, for example. The amphiphilic nanoparticles can increase the stability of the first and second regions that are phase-separated in the light emitting layer.

Also, in one example, the amphiphilic nanoparticles positioned at the boundaries of the first and second regions may have different refractive indices from those of the first and second regions. When the amphipathic nanoparticles are positioned at the boundaries of the first and second regions, the generation efficiency of white light can be further increased, for example, by scattering or diffusing light by the nanoparticles.

The degree of difference between the refractive indexes of the nanoparticles and the first and second regions may be set in an appropriate range in consideration of scattering or diffusing effects of the desired light, and the specific range thereof is not particularly limited. For example, the absolute value of the difference in refractive index between the nanoparticle and the first region and the absolute value of the difference in refractive index between the nanoparticle and the second region may be in the range of 0.01 to 1.5 or 0.05 to 0.5, respectively . The refractive index of the nanoparticles is not particularly limited as long as it satisfies the above range, and may be in the range of 1.0 to 2.0, for example. In the present specification, the term refractive index is a value measured for light having a wavelength of about 550 nm unless otherwise specified.

In one example, the amphiphilic nanoparticle may comprise a cell portion comprising a nanocore portion and an amphipathic compound surrounding the core portion. In the above, the amphipathic compound is a compound containing a hydrophilic moiety and a hydrophobic moiety at the same time, and some compounds are also known in the art as so-called surfactants. For example, when the core portion is hydrophobic, the hydrophilic portion of the amphipathic nanoparticle in the cell portion faces the core and the hydrophobic portion is externally disposed to form amphiphilic nanoparticles as a whole. On the other hand, when the core portion is hydrophilic The hydrophobic portion of the amphipathic nanoparticle in the cell portion may be directed to the core and the hydrophilic portion may be disposed externally to form the amphipathic nanoparticle as a whole. In the above, the core portion may have an average particle size within a range of, for example, about 10 nm to 1000 nm, but it is not particularly limited as long as it can be changed according to the purpose. Core portion, for example, gold, silver, copper, platinum, metals such as palladium, nickel, manganese or zinc particles, SiO _2, Al ₂ O _3, TiO _2, ZnO, NiO, CuO, MnO _2, MgO, Oxide particles such as SrO or CaO, or particles made of polymers such as PMMA (polymethacrylate) or PS (polystyrene) can be used.

Triton X-114 (CAS No. 9036-19-5), Triton X-100 (CAS No. 92046-34-9), Brij-58 (CAS No. 92046-34-9), amphoteric compounds of the cell portion. : 9004-95-9), octyl glucoside (CAS No .: 29836-26-8), octylthio glucoside (CAS No .: 85618-21-9), decaethylene glycol monodecyl ether decaethylene glycol monododecyl ether, CAS No .: 9002-92-0), N-decanoyl-N-methylglucamine (CAS No .: 85261-20-7), decyl maltopyrano N-dodecyl maltoside (CAS No .: 69227-93-6), nonaethylene glycol monododecyl ether (CAS No .: 82494-09-5), decyl maltopyranoside , CAS No .: 3055-99-0), N-nonanoyl-N-methylglucamine (CAS No .: 85261-19-4), octaethylene glycol monododecyl ether (CAS No .: 3055-98-9), span 20 (Span 20, CAS No .: 1338-39-2), polyvinylpyrrole Money (polyvinylpyrrolidone, CAS No .: 9003-39-8) or Synperonic F108 (PEO-b-PPO-b-PEO, CAS No .: 9003-11-06), etc. can be used, but are not limited thereto.

The amphiphilic nanoparticle may include the amphipathic compound in such a range that the stability of the first and second regions can be ensured. For example, the ratio of the amphipathic compound in the amphiphilic nanoparticles may be about 5% to 30% by weight, but the range may be changed so long as the stability between the first and second regions can be appropriately secured .

The manner of incorporating the amphiphilic nanoparticles in the light emitting layer, for example, the method of positioning them at the boundaries of the first and second regions is not particularly limited. For example, A suitable amount of the amphipathic nanoparticles may be blended.

The proportion of the amphiphilic nanoparticles in the light emitting layer can be selected in consideration of the stability of the phase-separated first and second regions, for example. In one example, the amphiphilic nanoparticles may be present at a concentration of 1 wt% to 10 wt% based on the total weight of the first region, the second region, or the light emitting layer.

The light emitting layer may also include scattering particles. The scattering particles included in the light emitting layer can improve the optical characteristics of the light emitting layer by controlling the probability that light incident on the light emitting layer is introduced into the light emitting nanoparticles. The term scattering particles as used herein refers to all kinds of particles that have a refractive index different from that of the surrounding medium, for example, the first or second region, and that have an appropriate size to scatter, refract, or diffuse the incident light . ≪ / RTI > For example, the scattering particles may have a refractive index that is lower or higher than the surrounding medium, for example, the first and / or the second region, and the absolute value of the refractive index difference with respect to the first and / Value of 0.2 or more or 0.4 or more. The upper limit of the absolute value of the difference in refractive index is not particularly limited, and may be, for example, about 0.8 or less or about 0.7 or less. The scattering particles may have an average particle diameter of, for example, 10 nm or more, 100 nm or more, 100 nm or more, 100 nm or 20000 nm, 100 nm or 15000 nm, 100 nm or 10000 nm, nm or from 100 nm to 500 nm. The scattering particle may have a shape such as a sphere, an ellipse, a polyhedron or an amorphous shape, but the shape is not particularly limited. Examples of the scattering particles include organic materials such as polystyrene or a derivative thereof, an acrylic resin or a derivative thereof, a silicone resin or a derivative thereof, or a novolak resin or a derivative thereof, or an organic material such as silica, alumina, titanium oxide or zirconium oxide Particles including an inorganic material can be exemplified. The scattering particles may include only one of the above materials, or may be formed to include two or more of the above materials. For example, as the scattering particles, hollow particles such as hollow silica or particles having a core / shell structure can be used.

The ratio of such scattering particles in the light emitting layer is not particularly limited, and can be selected at a proper ratio, for example, in consideration of the path of light incident on the light emitting layer.

The scattering particles may be included in, for example, the first or second region. In one example, the scattering particles may be contained in only one of the first and second regions, but not in the other region. As described above, the region in which the scattering particles are not present is a region substantially not containing the particles and the weight ratio of the scattering particles in the region is 10% or less based on the total weight of the region, % Or less, 6% or less, 4% or less, 2% or less, 1% or less, or 0.5% or less. In one example, when the light emitting nanoparticles are contained in only one of the first and second regions, the scattering particles may exist only in a region not containing the light emitting nanoparticles.

The scattering particles may be contained in the light emitting layer at a ratio of, for example, 10 to 100 parts by weight relative to 100 parts by weight of the total weight of the first or second region, and appropriate scattering characteristics can be ensured within this ratio.

The light-emitting layer may further include, in addition to the above-mentioned components, additives such as an oxygen scavenger, a radical scavenger or an antioxidant in necessary amounts.

The thickness of the light-emitting layer including the above-described components is not particularly limited, and may be selected within an appropriate range in consideration of the intended use and optical characteristics. In one example, the light emitting layer may have a thickness within a range of 10 [mu] m to 500 [mu] m, but is not limited thereto.

The light emitting film may further include a barrier layer disposed on one or both sides of the light emitting layer. Such a barrier layer can protect the luminescent layer from conditions under high temperature conditions or in the presence of harmful external factors such as oxygen and moisture. FIG. 1 shows an exemplary light emitting film including a light emitting layer 101 and barrier layers 102a and 102b disposed on both sides thereof. The barrier layer may be formed of a material having good stability, for example, hydrophobic and free from yellowing even when exposed to light. In one example, in order to reduce the loss of light at the interface between the light emitting layer and the barrier layer, the barrier layer may be selected so as to have a refractive index generally similar to that of the light emitting layer.

The barrier layer may be, for example, a solid material, or a cured liquid, gel, or polymer, and may be selected from materials that are flexible or non-flexible depending upon the application. The type of the material forming the barrier layer is not particularly limited and may be selected from known materials including glass, polymer, oxide, nitride, and the like. The barrier layer may be, for example, glass; Polymers such as PET (poly (ethylene terephthalate)); Or an oxide or nitride such as silicon, titanium or aluminum, or a combination of two or more of the above, but is not limited thereto.

The barrier layer may be present on both surfaces of the light-emitting layer, or may exist only on either surface thereof, as exemplified in Fig. Further, the light emitting film may have a structure in which a barrier layer exists on both sides as well as both sides, and the light emitting layer is entirely sealed by the barrier layer.

The present application also relates to a luminescent film, for example, a method for producing the luminescent film described above. The method may include, for example, polymerizing a layer comprising a mixture of a hydrophilic polymerizable composition and a hydrophobic polymerizable composition. As the hydrophilic and hydrophobic polymerizable composition, for example, the composition described above, that is, a composition including a hydrophilic or hydrophobic radically polymerizable compound and an initiator, may be used. Also, the above-mentioned amphipathic nanoparticles may be included in the hydrophilic and / or hydrophobic polymerizable composition. In addition, the mixture may be prepared by separately preparing the hydrophilic and hydrophobic polymerizable compositions and then mixing them, or by mixing the components constituting the hydrophilic and hydrophobic polymerizable compositions at once. In this case, the method may comprise polymerizing a layer of a mixture comprising a hydrophilic radical polymerizable compound, a hydrophobic radical polymerizable compound, a radical initiator and the nanoparticles. When such a mixture is polymerized, the amphiphilic nanoparticles are located at the boundaries of the first and second regions, and the emissive layer of the above-described form can be formed while phase separation occurs in the polymerization process.

The manner of forming the layer containing the mixture is not particularly limited. For example, each mixture can be formed by coating on a suitable substrate by a known coating method.

Also, the method of curing the layer formed in the above manner is not particularly limited. For example, a method of applying an appropriate range of heat to activate the initiator contained in each composition, It can be performed by a method of applying an electromagnetic wave.

In the above manufacturing method, the above-described light emitting layer is formed through the above steps. If necessary, a step of forming a barrier layer after forming the light emitting layer through the above step may be further performed, or the polymerization process may be performed in a state adjacent to the barrier layer.

The present application is also directed to a lighting device. An exemplary illumination device may include a light source and the light emitting film. In one example, the light source and the light emitting film in the illumination device may be arranged such that the light emitted from the light source can be incident on the light emitting film. When the light emitted from the light source is incident on the light emitting film, a part of the incident light is not absorbed by the light emitting nanoparticles in the light emitting film but is emitted as it is, while the other part is absorbed by the light emitting nanoparticles, Can be released. Accordingly, the color purity or color of light emitted from the light emitting film can be controlled by adjusting the wavelength of light emitted from the light source and the wavelength of light emitted by the light emitting nanoparticles. For example, if the light emitting layer contains the above-mentioned red and green particles in an appropriate amount and the light source is adjusted to emit blue light, white light may be emitted in the light emitting film.

The type of the light source included in the illumination device of the present application is not particularly limited, and an appropriate type can be selected in consideration of the type of the target light. In one example, the light source is a blue light source and may be, for example, a light source capable of emitting light in a wavelength range of 450 to 490 nm.

FIGS. 2 and 3 are views showing, by way of example, a lighting device including a light source and a light-emitting film as described above.

As shown in FIGS. 2 and 3, the light source and the light emitting film in the illumination device can be arranged such that light emitted from the light source can be incident on the light emitting film. In FIG. 2, the light source 201 is disposed below the light emitting film 101, so that the light emitted from the light source 201 in the upward direction can be incident on the light emitting film 101.

Fig. 3 shows a case where the light source 201 is disposed on the side surface of the light emitting film 101. Fig. When the light source 201 is disposed on the side surface of the light emitting film 101 as described above, light from the light source 201, such as a light guiding plate 301 and a reflection plate 302, Other means for enabling the light to be efficiently incident on the light emitting film 101 may be included.

The example shown in Figures 2 and 3 is one example of a lighting device of the present application, and the lighting device may have various known configurations and may additionally include various known configurations for this purpose.

The illumination device of the present application as described above can be used for various applications. A typical application to which the illumination apparatus of the present application may be applied is a display apparatus. For example, the illumination device can be used as a BLU (Backlight Unit) of a display device such as an LCD (Liquid Crystal Display).

In addition, the lighting device may be a backlight unit (BLU) of a display device such as a computer, a mobile phone, a smart phone, a personal digital assistant (PDA), a gaming device, an electronic reading device or a digital camera, , Stage lighting, decorative lighting, accent lighting or museum lighting, etc. In addition, it may be used in horticulture, special wavelength lighting required in biology, etc., but the application to which the lighting device can be applied is not limited to the above.

The present application can provide a luminescent film capable of providing an illumination device having excellent color purity and efficiency and excellent color characteristics. The luminescent film of the present application can stably maintain such excellent properties for a long period of time. The luminescent film of the present application can be used for various applications including various lighting devices as well as photovoltaic applications, optical filters or optical converters.

1 is a cross-sectional view of an exemplary light-emitting film.
Figures 2 and 3 are schematic diagrams of an exemplary lighting device.
4 is a view showing evaluation results of Examples and Comparative Examples.

Hereinafter, the light-emitting film or the like of the present application will be specifically described by way of examples and comparative examples, but the range of the light-emitting film or the like is not limited to the following examples.

Example  One.

PEGDA (poly (ethyleneglycol) diacrylate, CAS No .: 26570-48-9), LA (lauryl acrylate, CAS No .: 2156-97-0 ), bisfluorene diacrylate (CAS No. : 161182-73-6), green quantum dots (light emitting nanoparticles), surfactants (PVP, polyvinylpyrrolidone) and TiO ₂ particles surface-treated to show amphipathic properties were mixed in a ratio of 9: 1: 1: 0.1: 0.05: 0.05 (PEGDA: LA: BD: green quantum dot: PVP: TiO ₂ particles). Subsequently, Irgacure 2959 and Irgacure 907 as radical initiators were mixed at a concentration of about 1% by weight, respectively, and stirred for about 6 hours to prepare a mixture. Subsequently, the mixture was placed between two barrier films (i-components) spaced apart at regular intervals to a thickness of about 100 mu m and irradiated with ultraviolet rays to induce radical polymerization and cured to form a light emitting layer.

Comparative Example  One.

A light emitting layer was formed in the same manner as in Example 1, except that the surface-treated TiO ₂ particles were not used to exhibit amphipathicity.

101: luminescent layer or luminescent film
102a, 102b: barrier layer
201: Light source
301: light guide plate
302: Reflective layer

Claims (22)

A first region; A second region that is phase-separated from the first region; And a light-emitting layer including nanoparticles having refractive indices different from those of the first and second regions,
Wherein the nanoparticles are amphipathic nanoparticles located at the boundaries of the first and second regions,
Wherein an absolute value of a difference in refractive index between the amphipathic nanoparticle and the first region and an absolute value of a difference in refractive index between the amphipathic nanoparticle and the second region are within a range of 0.01 to 1.5, respectively. delete delete The light-emitting film according to claim 1, wherein the amphipathic nanoparticle comprises a cell portion including a nanocore portion and an amphipathic compound surrounding the nanocore portion. 5. The light-emitting film according to claim 4, wherein the nanocore portion has an average particle diameter within a range of 10 nm to 1000 nm. The light-emitting film according to claim 4, wherein the nanocore portion is a metal particle, an oxide particle, or a polymer particle. The method of claim 6, wherein the metal particles, gold particles, silver particles, copper particles, platinum particles, palladium particles, nickel particles, and manganese particles and zinc particles, oxide particles, SiO ₂ particles, Al ₂ O ₃ particles, TiO ₂ particles, ZnO particles, NiO particles, CuO particles, MnO ₂ particles, MgO particles, SrO particles or CaO particles, and the polymer particles are acrylic polymer particles or polystyrene polymer particles. The light-emitting device according to claim 1, wherein the light-emitting layer comprises 50 to 95 parts by weight of the first region and 5 to 50 parts by weight of the second region, or 5 to 50 parts by weight of the first region and 50 to 95 parts by weight of the second region . The method of claim 1, wherein the first region comprises a compound of Formula 1, a compound of Formula 2, a compound of Formula 3, a compound of Formula 4, a nitrogen-containing radically polymerizable compound, an acrylic acid, a methacrylic acid, A light-emitting film comprising a polymerized unit of a radically polymerizable compound:
[Chemical Formula 1]

Wherein Q is hydrogen or an alkyl group, U is an alkylene group, Z is hydrogen, an alkoxy group, an epoxy group or a monovalent hydrocarbon group, and m is an arbitrary number.
(2)

In the general formula (2), Q is hydrogen or an alkyl group, U is an alkylene group, and m is an arbitrary number.
(3)

In Formula (3), Q is hydrogen or an alkyl group, A is an alkylene group in which a hydroxyl group may be substituted, and U is an alkylene group:
[Chemical Formula 4]

In Formula 4, Q is hydrogen or an alkyl group, A and U are each independently an alkylene group, and X is a hydroxyl group or a cyano group. The method of claim 9, wherein the nitrogen-containing radically polymerizable compound is an amide group-containing radically polymerizable compound, an amino group-containing radically polymerizable compound, an imide group-containing radically polymerizable compound, or a cyano group- film. The light-emitting film according to claim 9, wherein the radically polymerizable compound containing a salt moiety is a salt of acrylic acid or methacrylic acid with an alkali metal or a salt of acrylic acid or methacrylic acid with an alkaline earth metal. The light-emitting film according to claim 1, wherein the second region comprises a polymerized unit of a compound represented by any one of the following formulas (5) to (7):
[Chemical Formula 5]

In Formula 5, Q is hydrogen or an alkyl group, and B is a linear or branched alkyl or alicyclic hydrocarbon group having 5 or more carbon atoms.
[Chemical Formula 6]

Q is hydrogen or an alkyl group, and U is an alkylene, alkenylene or alkynylene or arylene group,
(7)

Y is a carbon atom, an oxygen atom or a sulfur atom, X is an oxygen atom, a sulfur atom or an alkylene group, Ar is an aryl group, and n is an arbitrary Number. The luminescent film according to claim 1, wherein the first or second region comprises luminescent nanoparticles. 14. The method of claim 13, wherein the light emitting nanoparticles absorb light of any one wavelength within the range of 450 to 490 nm and emit light of any one wavelength within the range of 490 to 580 nm or light of any wavelength within the range of 600 to 780 nm A luminescent film which can be made. The luminescent film according to claim 14, wherein the luminescent nanoparticles are quantum dots. The luminescent film according to claim 14, wherein the luminescent nanoparticles are nanoparticles of a core cell structure. 14. The light-emitting film according to claim 13, wherein the weight ratio of the light-emitting nanoparticles contained in the first region is 10% or less based on the total weight of the light-emitting nanoparticles contained in the light-emitting layer. The method of claim 1, comprising polymerizing a layer of a mixture comprising a hydrophilic radical polymerizable compound, a hydrophobic radical polymerizable compound, a radical initiator, and nanoparticles. 19. The method according to claim 18, wherein the mixture further comprises light emitting nanoparticles. A light source and a light emitting film according to claim 1, wherein the light source and the light emitting film are arranged such that light from the light source can be incident on the light emitting film. 21. The illuminator according to claim 20, wherein the light source is capable of emitting light of a wavelength within a range of 450 to 490 nm. A display device comprising the illumination device of claim 20.

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