JP2017110061A - Phosphor-containing pseudo-solid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel phosphor containing pseudo-solid that can reduce the roughened surfaces of semiconductor nanoparticle phosphors and the aggregation of semiconductor nanoparticle phosphors, and can maintain excellent optical properties of semiconductor nanoparticle phosphors.SOLUTION: A phosphor containing pseudo-solid has one or plural types of semiconductor nanoparticle phosphor(s) dispersed in gelatinous matter in a wet state that comprises a support comprising a polymer chain forming a three-dimensional network structure, and a liquid dispersion medium.SELECTED DRAWING: Figure 1

Description

  In the present invention, one or more kinds of semiconductor nanoparticle phosphors are dispersed in a wet gel-like material comprising a support composed of a polymer chain forming a three-dimensional network structure and a liquid dispersion medium. The present invention relates to a phosphor-containing pseudo-solid.

  Semiconductor nanoparticle phosphors (also called quantum dots) are of commercial interest due to their size-tunable electronic properties due to quantum size effects. The variable size electronic properties can be used in a variety of applications such as biomarkers, solar power generation, catalysis, bioimaging, LEDs, general spatial illumination, and electroluminescent displays.

  Since the semiconductor nanoparticle phosphor is a colloidal particle, it is necessary to incorporate the nanoparticle into an encapsulating material before practical use. However, for example, even after the semiconductor nanoparticle phosphor is incorporated into the encapsulating material, if oxygen passes through the encapsulating material and moves to the surface of the semiconductor nanoparticle phosphor, photooxidation occurs, resulting in the semiconductor nanoparticle. The quantum yield (QY) of the particle phosphor is reduced.

  For example, in Japanese Patent Publication No. 2015-509125 (Patent Document 1), the semiconductor nanoparticle phosphor is brightened, its lifetime is longer, and / or it is difficult to react to various types of processing conditions. In order to improve the stability of the semiconductor nanoparticle phosphor, a step of preparing a suspension of nanoparticles suspended in a matrix material precursor and a step of converting the suspension into a molded nanoparticle phosphor A method for making a shaped nanoparticle phosphor comprising a matrix material and nanoparticles is disclosed. The molded nanoparticle phosphor described in Patent Document 1 can be formed from a matrix material precursor / nanoparticles using any molding technique such as polymerization molding, contact molding, extrusion molding, injection molding, and the like. Such shaped nanoparticle phosphors may be covered with a gas barrier, such as a polymer, metal oxide, metal nitride or glass.

  In the method described in Patent Document 1, the matrix material in which the semiconductor nanoparticle phosphor is dispersed is an arbitrary material in which nanoparticles can be dispersed and molded, and examples thereof include polymers, solgels, epoxies, silicones, and acrylates. Yes. For this reason, in the method disclosed in Patent Document 1, the surface of the semiconductor nanoparticle phosphor is roughened or the semiconductor nanoparticle phosphor is agglomerated in the step of molding the matrix material precursor, thereby improving the optical performance. There is a problem that it falls.

Special table 2015-509125 gazette

  The present invention has been made to solve the above-described problems, and the object of the present invention is to reduce the surface of the semiconductor nanoparticle phosphor and the aggregation of the semiconductor nanoparticle phosphor. The object is to provide a novel phosphor-containing pseudo-solid that can maintain the excellent optical properties of the nanoparticle phosphor.

  The phosphor-containing pseudo-solid according to the present invention comprises one or more kinds of semiconductor nanoparticles in a wet gel-like material comprising a support composed of a polymer chain forming a three-dimensional network structure and a liquid dispersion medium. The phosphor is dispersed.

  In the phosphor-containing quasi-solid of the present invention, the support is made of an acrylic acid polymer, vinyl polymer, epoxy polymer, polyvinylidene fluoride-hexafluoropropylene copolymer, tetrafluoroethylene-perfluoro [2 It is preferably at least one selected from-(fluorosulfonylethoxy) propyl vinyl ether copolymer, poly (2-hydroxyethyl) methacrylate and Tetra-PEG.

  In the phosphor-containing pseudo-solid according to the present invention, the liquid dispersion medium is at least one selected from water, toluene, hexane, chloroform, trioctylamine, trioctylphosphine oxide, 1-octadecene, and an ionic liquid. Preferably, it is an ionic liquid.

The phosphor-containing pseudo-solid of the present invention preferably contains two types of semiconductor nanoparticle phosphors.
The phosphor-containing pseudo-solid of the present invention may have a coating layer having translucency on the outermost surface. In this case, the material forming the coating layer is preferably an inorganic material having a band gap of 3.0 eV or more.

  The phosphor-containing pseudo-solid of the present invention may be in the form of a sheet. In this case, the sheet-like phosphor-containing pseudo-solid may be accommodated in the capillary.

  According to the phosphor-containing quasi-solid of the present invention, one or more kinds of semiconductors are contained in a wet gel-like material comprising a support composed of a polymer chain forming a three-dimensional network structure and a liquid dispersion medium. By dispersing the nanoparticle phosphor, the semiconductor nanoparticle phosphor can be pseudo-solidified without reacting with the liquid dispersion medium itself. Thus, it is possible to reduce the surface of the semiconductor nanoparticle phosphor and the aggregation of the semiconductor nanoparticle phosphor, and to provide a phosphor-containing pseudo-solid in which the excellent optical properties of the semiconductor nanoparticle phosphor are maintained. Can do. Moreover, the phosphor-containing pseudo-solid of the present invention has flexibility, and a wide range of applications utilizing the surface having flexibility is expected.

It is a figure which shows typically the fluorescent substance containing pseudo-solid 1 of the 1st embodiment of this invention. It is a figure which shows typically the fluorescent substance containing pseudo-solid 11 of the 2nd embodiment of this invention. It is a figure which shows typically the fluorescent substance containing pseudo-solid 21 of the 3rd embodiment of this invention. It is a figure which shows typically the fluorescent substance containing pseudo-solid 31 of the 4th embodiment of this invention. It is a figure which shows typically the fluorescent substance containing pseudo-solid 41 of the 5th embodiment of this invention. It is a figure which shows typically the fluorescent substance containing pseudo-solid 51 of the 6th embodiment of this invention.

(Phosphor-containing pseudo-solid of the first embodiment)
FIG. 1 is a diagram schematically showing a phosphor-containing pseudo-solid 1 according to a first embodiment of the present invention. As shown in the example shown in FIG. 1, the phosphor-containing pseudo-solid 1 of the present invention is a wet gel-like material 3 comprising a support composed of a polymer chain forming a three-dimensional network structure and a liquid dispersion medium. One or a plurality of types of semiconductor nanoparticle phosphors 2 are dispersed therein.

  The support used for the gel-like material in the phosphor-containing pseudo-solid 1 of the present invention is not particularly limited as long as it is composed of a polymer chain forming a three-dimensional network structure. For example, acrylic acid Polymer, vinyl polymer, epoxy polymer, polyvinylidene fluoride-hexafluoropropylene copolymer (PVDF-HFP), tetrafluoroethylene-perfluoro [2- (fluorosulfonylethoxy) propyl vinyl ether copolymer, poly (2 A preferred example is at least one selected from -hydroxyethyl) methacrylate and Tetra-PEG. In addition to these, for example, conventionally known appropriate rubber materials, proteins, polysaccharides and the like may be used as a support in the present invention within the applicable range. However, the acrylic acid described above is used because of its high chemical stability. Polymer, vinyl polymer, epoxy polymer, polyvinylidene fluoride-hexafluoropropylene copolymer (PVDF-HFP), tetrafluoroethylene-perfluoro [2- (fluorosulfonylethoxy) propyl vinyl ether copolymer, poly (2 It is preferable to use a support formed of at least one selected from -hydroxyethyl) methacrylate and Tetra-PEG.

  Here, the acrylic acid polymer refers to a polymer of acrylic acid ester or methacrylic acid ester, for example, poly [2-acrylamide-2-methylpropanesulfonic acid] (PAMPS), polyacrylamide (PAAm), polyacrylic acid. Examples include sodium, polyacrylic acid, ammonium polyacrylate, crosslinked sodium polyacrylate, crosslinked polyacrylic acid, and polymethyl methacrylate.

  A vinyl polymer refers to a polymer of a vinyl compound, such as polyvinyl alcohol, polyethylene, polyvinyl chloride, polystyrene, polyacrylonitrile, polypropylene, polyvinyl acetate, polyvinyl fluoride, polyvinylidene chloride, ethylene vinyl alcohol copolymer, etc. Is exemplified.

  Epoxy polymer refers to a thermosetting resin that can be cured by forming a cross-linked network with epoxy groups remaining in the polymer, such as bisphenol F type epoxy resin, polyfunctional epoxy resin, flexible epoxy. Resins, brominated epoxy resins, polymer type epoxy resins, biphenyl type epoxy resins and the like are exemplified.

  Among the above, a tetrafluoroethylene-perfluoro [2- (fluorosulfonylethoxy) propyl vinyl ether] copolymer is a copolymer of a fluororesin based on sulfonated tetrafluoroethylene, and is a Nafion (registered trademark). ) And other commercial products are known. Moreover, among the above, Tetra-PEG is obtained by carrying out the end-to-end cross-linking reaction of two types of four-forged polyethylene glycol each having an amine end and an N-hydroxysuccinimide (NHS) end (active ester end).

  Of course, the support may be a combination of a plurality of the above-mentioned ones. For example, among the above-mentioned acrylic polymers, the hard and brittle poly [2-acrylamido-2-methylpropanesulfonic acid] (PAMPS) and the flexible In combination with neutral polyacrylamide (PAAm), a support having a double network structure and high mechanical strength can be realized.

  In the phosphor-containing pseudo-solid according to the present invention, the support in the wet gel-like material forms a three-dimensional network structure. For example, a slice image observed by a confocal laser scanning microscope (LSCM) is also used. This can be confirmed by constructing a three-dimensional image. The size of the mesh in the network structure is not particularly limited, but is preferably in the range of 5 to 100 nm, preferably in the range of 10 to 30 nm because the semiconductor nanoparticle phosphor is easily retained. Is more preferable. Note that the mesh size of the support is, for example, a relational expression of a correlation coefficient ξ that represents the diffusion coefficient D and the gel mesh size by measuring the diffusion coefficient D by scanning microscope scattering or dynamic light scattering.

(In the above formula,

Represents the Boltzmann coefficient, and η represents the viscosity of the liquid dispersion medium. )
Can be obtained from

  The liquid dispersion medium contained in the gel-like material in the phosphor-containing pseudo-solid of the present invention is not particularly limited as long as it is a liquid that can be used to disperse the semiconductor nanoparticle phosphor. For example, water, toluene, hexane , Chloroform, trioctylamine, trioctylphosphine, trioctylphosphine oxide, organic solvents such as 1-octadecene, ionic liquids (described later), and the like. Of these, organic semiconductor particles such as toluene and hexane, and ionic liquids are preferably used as the liquid dispersion medium, because when the semiconductor nanoparticle phosphor is dispersed, a product having particularly high emission characteristics can be obtained.

The wet gel-like material in the present invention refers to a material composed of a support composed of a polymer chain forming a three-dimensional network structure as described above and a liquid dispersion medium. Gels (dry gels) obtained by forming a network of dispersoids by the so-called sol-gel method such as silica gel by hydrolysis and dehydration condensation of the sol-gel are not included in the “wet gel-like product” in the present invention. It should be noted that the gel-like product is “wet”
(Weight of gel containing liquid−weight of dried gel) / weight of gel containing liquid × 100
It indicates that the liquid content calculated by the above is 10% or more.

  The shape of the wet gel-like material in the present invention is not particularly limited, and examples thereof include a sheet shape, a spherical shape, a fiber shape, a disk shape, a shaft shape, an egg shape, a cube shape, and a rectangular parallelepiped shape.

  In the wet gel-like material in the present invention, the ratio of the support to the liquid dispersion medium is not particularly limited, but the liquid dispersion medium may be in the range of 20 to 100,000 with respect to the support 100 by weight ratio. Preferably, it is in the range of 50 to 10,000. When the weight ratio of the liquid dispersion medium is less than 20 with respect to the support 100, the flexibility tends to decrease, and when the weight ratio of the liquid dispersion medium with respect to the support 100 exceeds 100,000. This is because the mechanical strength tends to decrease. The ratio of the support to the liquid dispersion medium in the wet gel-like material can be obtained, for example, by measuring the weight of the wet gel-like material and the dry gel-like material.

  The semiconductor nanoparticle phosphor 2 according to the present invention has high luminous efficiency, has a very narrow emission line width, and has the characteristics that the emission wavelength can be controlled by adjusting the nanoparticle size. In general, when the dispersibility is good in a liquid dispersion medium, the light emission efficiency is high, but when dispersed in a solid such as a resin, energy deactivation occurs between the nanoparticle phosphors due to aggregation and the efficiency is lowered. Further, the use of the semiconductor nanoparticle phosphor has an advantage that the emission wavelength can be precisely controlled by the composition control.

  The raw material of the semiconductor nanoparticle phosphor is not particularly limited, and CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, InN, InP, InAs, InSb, AlP, conventionally used as the semiconductor nanoparticle phosphor. It may be at least one selected from AlS, AlAs, AlSb, GaN, GaP, GaAs, GaSb, PbS, PbSe, Si, Ge, MgS, MgSe, and MgTe. In addition, semiconductor nanoparticle phosphors are known to those skilled in the art two-component core, three-component core, four-component core, core-shell or core multi-shell, doped semiconductor nanoparticle phosphor or tilted It may be a semiconductor nanoparticle phosphor.

  The shape of the semiconductor nanoparticle phosphor is not particularly limited, but a semiconductor nanoparticle phosphor having a conventionally known appropriate shape such as a spherical shape, a rod shape, or a wire shape can be used without any particular limitation. In particular, from the viewpoint of easy control of light emission characteristics by shape control, it is preferable to use a spherical semiconductor nanoparticle phosphor.

  The particle diameter of the semiconductor nanoparticle phosphor can be appropriately selected according to the raw material and the desired emission wavelength, and is not particularly limited, but is preferably in the range of 1 to 20 nm, and in the range of 2 to 5 nm. More preferably. This is because when the particle diameter of the semiconductor nanoparticle phosphor is less than 1 nm, the ratio of the surface area to the volume increases, so that surface defects tend to be dominant and the effect tends to decrease. This is because when the particle diameter of the body exceeds 20 nm, the dispersed state tends to decrease and aggregation / sedimentation tends to occur. Here, when the shape of the semiconductor nanoparticle phosphor is spherical, the particle diameter refers to, for example, an average particle diameter measured by a particle size distribution measuring apparatus or a particle size observed by an electron microscope. When the semiconductor nanoparticle phosphor is rod-shaped, the particle diameter refers to the size of the short axis and the long axis measured by, for example, an electron microscope. Furthermore, when the shape of the semiconductor nanoparticle phosphor is a wire shape, the particle diameter refers to the size of the short axis and the long axis measured by, for example, an electron microscope.

  In the phosphor-containing quasi-solid of the present invention, the semiconductor nanoparticle phosphor is preferably dispersed within a range of 0.00001 to 100 parts by weight with respect to 100 parts by weight of the liquid dispersion medium, and 0.001 to 50 More preferably, it is dispersed within the range of parts by weight. This is because when the semiconductor nanoparticle phosphor is less than 0.00001 parts by weight with respect to 100 parts by weight of the liquid dispersion medium, the concentration tends to be low and sufficient light emission intensity cannot be obtained. If the amount exceeds 100 parts by weight, the dispersibility is poor and the semiconductor nanoparticle phosphors tend to aggregate with each other, resulting in a decrease in luminous efficiency.

  According to the phosphor-containing quasi-solid of the present invention, the semiconductor nanoparticle phosphor is dispersed in a wet gel-like material, and the semiconductor nanoparticle phosphor is aggregated without deteriorating. Can be dispersed. This provides a phosphor-containing quasi-solid that can reduce the surface of the semiconductor nanoparticle phosphor and the aggregation of the semiconductor nanoparticle phosphor and maintain the excellent optical properties of the semiconductor nanoparticle phosphor. Can do. Moreover, in this invention, since the gel-like thing of a wet state is used, compared with the case where a dry gel is used, light transmittance is high. In addition, since there is elasticity compared to the case of using a dry gel, there is an advantage that it can be closely attached to a member (because it has flexibility, it can be easily attached to a curved surface etc.) and has flexibility. A wide range of applications utilizing the aspect is expected. Furthermore, compared to the case of using a dry gel, the use of a liquid dispersion medium having a high thermal conductivity can increase the thermal conductivity, which is advantageous when releasing heat from the semiconductor nanoparticle phosphor. There is an advantage of being.

  The wet gel-like substance in the phosphor-containing pseudo-solid of the present invention can be produced by a conventionally known appropriate method. For example, the precursor of the support in a state before forming the three-dimensional network structure and the liquid dispersion medium in a state where the semiconductor nanoparticle phosphor is dispersed are mixed and heated under appropriate conditions. The support forms a three-dimensional network structure. Further, a support that has already formed a three-dimensional network structure and a liquid dispersion medium in which semiconductor nanoparticle phosphors are dispersed may be mixed. As another method, for example, a support may be formed by crosslinking a part of the liquid dispersion medium in which the semiconductor nanoparticle phosphor is dispersed, or the liquid dispersion in the state in which the semiconductor nanoparticle phosphor is dispersed. It is good also as a gel-like thing of a wet state by adding a low molecular gelatinizer to a medium. The size of the network in the three-dimensional network structure of the support can be adjusted by, for example, whether or not a crosslinking agent is added.

(Phosphor-containing pseudo-solid of the second embodiment)
FIG. 2 is a diagram schematically showing the phosphor-containing pseudo-solid 11 according to the second embodiment of the present invention. Note that the phosphor-containing pseudo-solid 11 in the example shown in FIG. 2 has the same configuration as the phosphor-containing pseudo-solid 1 in the example shown in FIG. Are denoted by the same reference numerals, and description thereof is omitted.

  In the phosphor-containing pseudo-solid 11 of the example shown in FIG. 2, the fluorescence of the example shown in FIG. 1 is obtained in that two kinds of semiconductor nanoparticle phosphors 12 and 13 are dispersed in the gel-like material 3 in a wet state. Different from body-containing pseudo-solid 1. By realizing the phosphor-containing pseudo-solid so as to have a plurality of emission peaks, there is an advantage that adjustment to the target emission spectrum is easy. For example, by using a phosphor-containing pseudo-solid that is a combination of two types of semiconductor nanoparticle phosphors having a red emission peak and a green emission peak, when combined with a blue excitation light source, color rendering properties are easily achieved. Good white light can be realized. In the example shown in FIG. 2, for example, two types of semiconductor nanoparticle phosphors having different emission peaks (for example, a semiconductor nanoparticle phosphor 12 that emits red light and a semiconductor nanoparticle phosphor 13 that emits green light) Dispersed in the wet gel-like product 3.

(Phosphor-containing pseudo-solid of the third embodiment)
FIG. 3 is a diagram schematically showing the phosphor-containing pseudo-solid 21 according to the third embodiment of the present invention. The phosphor-containing pseudo-solid 21 in the example shown in FIG. 3 has the same configuration except for a part of the phosphor-containing pseudo-solid 1 in the example shown in FIG. Are denoted by the same reference numerals, and description thereof is omitted.

  The phosphor-containing pseudo-solid 21 in the example shown in FIG. 3 uses an ionic liquid as a liquid dispersion medium in the gel-like material 22 in a wet state. The ionic liquid has a very low vapor pressure, can maintain the gel-like material in a wet state for a long period of time, and can prevent deterioration of the semiconductor nanoparticle phosphor due to evaporation of the liquid dispersion medium. There is an advantage that the chemical stability of the phosphor can be further improved and high light emission characteristics can be maintained. In addition, since the ionic liquid has the effect of electrostatically stabilizing the surface of the semiconductor nanoparticle phosphor and stably dispersing it without agglomeration, a pseudo-solid exhibiting high luminous efficiency and luminance can be obtained.

  Examples of ionic liquids include ammonium-based and phosphonium-based ions such as imidazolium salts and pyridinium salts as cations, halogen-based compounds such as bromide ions and triflate as anions, boron-based compounds such as tetraphenylborate, and hexafluorophosphate. Other than these, other combinations include ions present as ionic liquids. Specific examples of the ionic liquid include 2- (methacryloyloxy) -ethyltrimethylammonium bis (trifluoromethanesulfonyl) imide, 1- (3-acryloyloxy-propyl) -3-methylimidazolium ethyltrimethylammonium bis (trifluoromethane) Sulfonyl) imide, N, N, N-trimethyl-N-propylammonium bis (trifluoromethanesulfonyl) imide, N, N-dimethyl-N-methyl-2- (2-methoxyethyl) ammonium bis (trifluoromethanesulfonyl) imide 1-allyl-3-butylimidazolium tetrafluoroborate, 1-methyl-3-octylimidazolium hexafluorophosphate, and the like. Among these, since ionic liquids containing impurities such as water tend to lower the long-term stability of the semiconductor nanoparticle phosphor, N, N, N-trimethyl is hydrophobic as an ionic liquid and can easily separate water. It is preferable to use -N-propylammonium bis (trifluoromethanesulfonyl) imide.

(Phosphor-containing pseudo-solid of the fourth embodiment)
FIG. 4 is a diagram schematically showing a phosphor-containing pseudo-solid 31 according to the fourth embodiment of the present invention. The phosphor-containing pseudo-solid 31 in the example shown in FIG. 4 has the same configuration except for a part of the phosphor-containing pseudo-solid 1 in the example shown in FIG. Are denoted by the same reference numerals, and description thereof is omitted.

  The phosphor-containing pseudo-solid 31 of the present invention may have a translucent coating layer 34 on the outermost surface as in the example shown in FIG. In the example shown in FIG. 4, one type of semiconductor nanoparticle phosphor 32 is dispersed in a spherical gel material 33, and a coating layer 34 having a light transmitting property is formed on the surface of the gel material 33. By providing the translucent coating layer 34 on the outermost surface (in other words, a wet gel-like material is held in the capsule-shaped coating layer), oxygen and moisture transmittances are reduced. As a result, deterioration due to photo-oxidation of the semiconductor nanoparticle phosphor can be suppressed, and the chemical stability of the semiconductor nanoparticle phosphor can be further improved.

The material for forming the coating layer 34 is not particularly limited as long as it is a light-transmitting material, but a light-transmitting inorganic material such as a metal oxide or a silica-based material is preferable. The covering layer 34 is preferably an inorganic material having a band gap of preferably 3.0 eV or more among any of these materials. Examples of the metal oxide inorganic material having a band gap of 3.0 eV or more and absorbing ultraviolet rays include SiO ₂ , ZnO, TiO ₂ , CeO ₂ , SnO ₂ , ZrO ₂ , Al ₂ O ₃ , and ZnO: Mg. Illustrated. Among these, ZnO, TiO ₂ , Al ₂ O ₃ , CeO ₂ , and SnO ₂ can absorb a wide range of ultraviolet rays (up to a range close to visible light among ultraviolet rays) because the band gap is close to 3.0 eV. . Since SiO ₂ , ZrO ₂ , and ZnO: Mg have a band gap that is considerably larger than 3.0 eV, they absorb only ultraviolet rays having a considerably short wavelength and transmit ultraviolet rays in a range close to visible light. By providing a coating layer 34 formed of an inorganic material having a band gap of 3.0 eV or more on the outermost surface, deterioration of the semiconductor nanoparticle phosphor due to ultraviolet rays can be suppressed, and as a result, chemical stability can be improved. is there. In the present invention, it is more preferable if the inorganic material is an inorganic crystal.

(Phosphor-containing pseudo-solid of the fifth embodiment)
FIG. 5 is a diagram schematically showing a phosphor-containing pseudo-solid 41 according to a fifth embodiment of the present invention. The phosphor-containing pseudo-solid 41 of the example shown in FIG. 5 has the same configuration as the phosphor-containing pseudo-solid 1 of the example shown in FIG. Are denoted by the same reference numerals, and description thereof is omitted.

  The phosphor-containing pseudo-solid 41 in the example shown in FIG. 5 has a wet gel-like material 42 formed in a sheet shape. In the phosphor-containing pseudo-solid 1, 11 and 21 of the example shown in FIGS. 1 to 3, the wet gel-like material is assumed to have an arbitrary shape, but as shown in FIG. By making the shape of the gel-like material into a sheet shape, there is an advantage that it can be easily applied to a place requiring flexibility such as a curved surface by utilizing the surface having flexibility.

(Phosphor-containing pseudo-solid of the sixth embodiment)
FIG. 6 is a diagram schematically showing a phosphor-containing pseudo-solid 51 according to a sixth embodiment of the present invention. The phosphor-containing pseudo-solid 51 in the example shown in FIG. 6 has the same configuration as that of the phosphor-containing pseudo-solid 1 in the example shown in FIG. 1, except for a part having the same configuration. Are denoted by the same reference numerals, and description thereof is omitted.

In the example shown in FIG. 6, a sheet-like wet gel material 42 similar to that shown in FIG. 5 is accommodated in the capillary 53. By adopting such a form, the substrate 52 constituting the capillary 53 reduces deterioration due to external stimuli such as oxygen, moisture, and light, and the semiconductor nanoparticle phosphor dispersed in a wet gel-like material The chemical stability of can be further improved. In the example shown in FIG. 6, the base material 52 constituting the capillary 53 is not particularly limited as long as it has translucency, and metal oxides (SiO ₂ , Al ₂ O ₃ ) are not limited. , TiO _{2, and the} like) and solids composed of ionic liquids.

  DESCRIPTION OF SYMBOLS 1 Phosphor containing pseudo-solid, 2 Semiconductor nanoparticle fluorescent substance, 3 Wet gel-like substance, 11 Phosphor containing pseudo solid, 12 Semiconductor nano particle fluorescent substance, 13 Semiconductor nano particle fluorescent substance, 21 Phosphor containing pseudo solid, 22 wet gel, 31 phosphor-containing quasi-solid, 32 semiconductor nanoparticle phosphor, 33 wet gel, 34 coating layer, 41 phosphor-containing quasi-solid, 42 wet gel, 51 Phosphor-containing pseudo-solid, 52 base material, 53 capillary.

Claims (9)

  Phosphor-containing, in which one or more kinds of semiconductor nanoparticle phosphors are dispersed in a wet gel-like material composed of a support composed of polymer chains forming a three-dimensional network structure and a liquid dispersion medium Pseudo solid.   The material for forming the support is an acrylic acid polymer, vinyl polymer, epoxy polymer, polyvinylidene fluoride-hexafluoropropylene copolymer, tetrafluoroethylene-perfluoro [2- (fluorosulfonylethoxy) propyl vinyl ether copolymer The phosphor-containing pseudo-solid according to claim 1, which is at least one selected from a coalescence, poly (2-hydroxyethyl) methacrylate, and Tetra-PEG.   The phosphor-containing material according to claim 1 or 2, wherein the liquid dispersion medium is at least one selected from water, toluene, hexane, chloroform, trioctylamine, trioctylphosphine oxide, 1-octadecene, and ionic liquid. Pseudo solid.   The phosphor-containing pseudo-solid according to claim 3, wherein the liquid dispersion medium is an ionic liquid.   The phosphor-containing pseudo-solid according to any one of claims 1 to 4, comprising two kinds of semiconductor nanoparticle phosphors.   The phosphor-containing pseudo-solid according to any one of claims 1 to 5, comprising a translucent coating layer on an outermost surface.   The phosphor-containing pseudo-solid according to claim 6, wherein the material forming the coating layer is an inorganic material having a band gap of 3.0 eV or more.   The phosphor-containing pseudo-solid according to any one of claims 1 to 7, which is in a sheet form.   The phosphor-containing pseudo-solid according to claim 8, which is accommodated in a capillary.

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