JP6134951B2 - Luminescent thermoplastic resin composition - Google Patents

Description

  The present invention relates to a light-emitting thermoplastic resin composition, a method for producing the same, and a thermoplastic resin composition particularly suitable for a solar cell member.

  2. Description of the Related Art Conventionally, a solar cell module including a crystalline silicon solar cell element, a sealing resin layer that seals the solar cell element, and a coating layer that covers the sealing resin layer is known. In this solar cell module, light (sunlight) light energy is converted into electric energy (photoelectric conversion). In such a solar cell module, paying attention to the spectral sensitivity of the crystalline silicon-based solar cell element, the spectral sensitivity of the solar cell element is a wavelength region shifted to the long wavelength side with respect to the peak wavelength region of the solar radiation spectrum. In, it is high. Therefore, it has been proposed to increase the spectral sensitivity of the solar cell element by converting the wavelength of sunlight to the longer wavelength side, thereby improving the photoelectric conversion efficiency of the solar cell module.

  Specifically, Patent Document 1 proposes to provide a fluorescent material film on the surface of the top sheet. In Patent Document 1, the photoelectric conversion efficiency of the solar cell module is improved by wavelength conversion in which the fluorescent material in the film absorbs short-wavelength light as excitation light and emits it as long-wavelength fluorescence.

  Similarly to the above, in Patent Document 2, as a technology for wavelength conversion using a fluorescent substance, for example, a phosphor is added to a sealing agent (sealing resin layer) containing a resin as a main component. It is disclosed.

  Patent Document 3 discloses combining a luminescent dye and an ionic liquid as a method for improving wavelength conversion characteristics.

JP 2001-7377 A Japanese Patent Application Laid-Open No. 07-202243 JP 2004-219233 A

  Many of the phosphors used in Patent Documents 1 and 2, especially luminescent dyes, have low solubility in the resin, and when added to and mixed with the resin, the transparency of the resin is lowered without being completely dissolved. There was a problem such as. Further, when the luminescent dye is added at a high concentration, there is a possibility that not only the transparency is lowered but also the light emission characteristics are lowered.

  Patent Document 3 discloses that a light emitting property is improved by combining a luminescent dye and an ionic liquid. However, when used as a member for a solar cell, the resin composition is dispersed in a resin. It is unclear whether or not the effect of improving the luminescent properties will be manifested when dispersed in a resin, and depending on the amount of ionic liquid used, the resin may be plasticized and moldability Could be reduced.

  The objective of this invention is providing the composition which improves the light emission characteristic and transparency important for power generation efficiency improvement, without reducing the molding processability of a thermoplastic resin.

  As a result of intensive studies, the present inventors have made the ionic liquid and the luminescent dye a predetermined addition amount and addition amount ratio with respect to the thermoplastic resin, without reducing the molding processability of the thermoplastic resin, It has been found that it is possible to provide a composition having improved luminescent properties and transparency.

  That is, the present invention includes 0.0005 to 5 parts by mass of ionic liquid (B) and 0.005 to 5 parts by mass of luminescent dye (C) with respect to 100 parts by mass of thermoplastic resin (A), and It is a luminescent thermoplastic resin composition whose mass ratio of the ionic liquid with respect to a luminescent pigment | dye is 0.1-100.

  Another embodiment of the present invention is a light-emitting thermoplastic resin composition in which the thermoplastic resin (A) is a (meth) acrylic resin.

  In one embodiment of the present invention, the ionic liquid (B) is an alicyclic amine-based ionic liquid, an aliphatic amine-based ionic liquid, an amidine-based ionic liquid, an imidazolium-based ionic liquid, a pyridium-based ionic liquid, or a phosphine-based ion. The light-emitting thermoplastic resin composition is at least one selected from the group consisting of liquids.

  One embodiment of the present invention is a light-emitting thermoplastic resin composition in which the light-emitting dye (C) is a light-emitting dye having an emission peak wavelength of 400 to 1000 nm.

  One aspect of the present invention is a luminescent thermoplastic resin composition in which the luminescent dye (C) is a rhodamine dye or a rubrene dye.

  Another embodiment of the present invention is a method for producing a light-emitting thermoplastic resin composition, which includes a step of kneading the light-emitting thermoplastic resin composition at a temperature of 100 to 400 ° C.

  One aspect of the present invention is a molded body made of the light-emitting thermoplastic resin composition or manufactured by the manufacturing method.

  One embodiment of the present invention is a light-emitting body including the molded body.

  One embodiment of the present invention is a solar cell topsheet comprising the light emitter.

  One embodiment of the present invention is a solar cell module including the light-emitting body.

  According to the present invention, molding is excellent in light emission characteristics in the visible light region and excellent in transparency when irradiated with light in the range from ultraviolet to visible light without deteriorating the molding processability of the thermoplastic resin. A composition capable of giving a body is obtained. That is, this composition gives a molded article having a longer wavelength by irradiating light and having excellent emission intensity. The molded body according to the present invention is suitable as a top sheet member of a solar cell and a member for a solar cell module because it has excellent light emission characteristics. In addition, since it has high emission characteristics, is solid and has good handling, it is also useful as a phosphor for LED, organic EL, and dye laser.

FIG. 1 is a graph showing emission spectra of molded articles of Example 1 and Comparative Example 1 at an excitation wavelength of 350 nm. FIG. 2 is a graph showing the external quantum yield of the molded articles of Example 1 and Comparative Example 1 when the excitation wavelength is 300 to 500 nm. FIG. 3 is a graph showing the internal quantum yield of the molded articles of Example 1 and Comparative Example 1 when the excitation wavelength is 300 to 500 nm.

  The thermoplastic resin (A) used in the present invention is not particularly limited as long as it is a transparent thermoplastic resin.

  Examples of the thermoplastic resin (A) include acrylic resins, styrene resins, MS resins, polycarbonate resins, polyvinyl chloride resins, polyester resins, and olefin resins. These may be used alone or in combination of two or more.

  The acrylic resin is a known acrylic resin and is obtained by polymerizing (meth) acrylic acid ester.

Examples of (meth) acrylic acid esters include methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, cyclohexyl (meth) acrylate, phenyl (meth) acrylate, and (meth) acrylic. Examples include benzyl acid, 2-ethylhexyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, and (meth) acrylic acid. These may be used alone or in combination of two or more.
Of these, methyl methacrylate is preferred.

  As the acrylic resin, since the light transmittance, heat resistance, mechanical properties, and moldability are good, the thermoplastic resin (A) according to the present invention is a resin containing 50% by mass or more of methyl methacrylate units. It is preferable that

  The resin containing 50% by mass or more of methyl methacrylate unit according to the present invention has a methyl methacrylate unit of 50 to 99.9% by mass and other monomer units from the viewpoint of ensuring its excellent optical properties and light resistance. It is preferably composed of 0.1 to 50% by mass, more preferably composed of 60 to 99.9% by mass of methyl methacrylate units, and 0.1 to 40% by mass of other monomer units. More preferably, it is composed of 70 to 99.9% by mass of acid methyl units and 0.1 to 30% by mass of other monomer units.

Examples of other monomers that are raw materials constituting other monomer units include, for example, methyl acrylate, ethyl acrylate, butyl acrylate, cyclohexyl acrylate, phenyl acrylate, benzyl acrylate, 2-acrylate. Acrylic esters such as ethylhexyl; Methacrylic esters such as ethyl methacrylate, butyl methacrylate, cyclohexyl methacrylate, phenyl methacrylate, benzyl methacrylate; Vinyl acetate; Styrene, p-methylstyrene, α-methylstyrene, vinylnaphthalene, etc. Aromatic vinyl monomers; vinyl cyanide monomers such as acrylonitrile and methacrylonitrile; α, β-unsaturated carboxylic acids such as acrylic acid, methacrylic acid, and crotonic acid; N-ethylmaleimide, N-cyclohexylmaleimide Maleimide compounds such as And the like.
These may be used alone or in combination of two or more.

  Examples of the polyvinyl chloride resin include vinyl chloride homopolymers; copolymers of vinyl chloride and monomers such as ethylene, propylene, acrylonitrile, vinylidene chloride, vinyl acetate; polyvinyl chloride with MBS, ABS, Examples include nitrile rubber, chlorinated polyethylene, ethylene vinyl alcohol-vinyl chloride graft copolymer, and modified polyvinyl chloride resin to which various plasticizers are added.

Examples of the olefin resin include polyethylene resins such as high-density polyethylene, low-density polyethylene, and linear low-density polyethylene; ethylene-vinyl acetate copolymer having a vinyl acetate unit content of 0.1 to 25% by mass; An ethylene-acrylic acid copolymer having an acrylic acid unit content of 0.1 to 25% by mass; an ethylene-propylene copolymer having an ethylene unit content of 2 to 40% by mass; and a cycloolefin resin (COP). It is done.
Among these, high-density polyethylene and cycloolefin resin (COP) are preferable because the resulting molded article has excellent transparency.

  The polycarbonate resin includes a polymer obtained by a reaction between a dihydroxy compound and a carbonate such as phosgene or diphenyl carbonate. The dihydroxy compound may be an alicyclic compound or the like, but is preferably a bisphenol compound. Examples of the bisphenol compound include bis (4-hydroxyphenyl) methane, 1,1-bis (4-hydroxyphenyl) propane, 2,2-bis (4-hydroxyphenyl) propane (bisphenol A), 2,2-bis ( 4-hydroxy-3-methylphenyl) propane, 2,2-bis (4-hydroxyphenyl) butane, 2,2-bis (4-hydroxyphenyl) -3-methylbutane, 2,2-bis (4-hydroxyphenyl) ) Bis (hydroxyaryl) C 1-6 alkanes such as hexane, 2,2-bis (4-hydroxyphenyl) -4-methylpentane; 1,1-bis (4-hydroxyphenyl) cyclopentane, 1,1-bis Bis (hydroxyaryl) C4-10 cycloalkali such as (4-hydroxyphenyl) cyclohexane 4,4'-dihydroxydiphenyl ether, 4,4'-dihydroxydiphenyl sulfone; 4,4'-dihydroxydiphenyl sulfide; and 4,4'-dihydroxydiphenyl ketone.

  The styrenic resin is a styrenic resin obtained by polymerizing at least one selected from a styrenic monomer and, if necessary, other vinyl monomers copolymerizable with these and a rubbery polymer. is there.

  Examples of the styrene monomer used in the styrene resin component include styrene, α-methyl styrene, o-methyl styrene, p-methyl styrene, vinyl xylene, ethyl styrene, dimethyl styrene, p-tert-butyl styrene, vinyl. Styrene derivatives such as naphthalene, methoxystyrene, monobromostyrene, dibromostyrene, fluorostyrene, tribromostyrene and the like, with styrene being particularly preferred. Furthermore, these can be used alone or in combination of two or more.

  Examples of the MS resin include a resin obtained by copolymerizing 99 to 1% by mass of a (meth) acrylic acid ester monomer and 1 to 99% by mass of a styrene monomer.

  Examples of the polyester resin include PET (polyethylene terephthalate), PEN (polyethylene naphthalate), PTT (polytrimethylene terephthalate), PBT (polybutylene terephthalate), PBN (polybutylene naphthalate), PLA (polylactic acid), Not only PBS (polybutylene succinate), PHN (polyhexamethylene naphthalate), and PHT (polyhexamethylene terephthalate) but also all polymer compounds obtained by polycondensation reaction of a dicarboxylic acid component and a diol component are included.

  The molecular weight of the thermoplastic resin (A) is preferably 50,000 to 200,000, more preferably 60,000 to 150,000 in the case of a molding material that is molded by heating and melting. preferable.

  If the weight average molecular weight of the thermoplastic resin (A) is 50,000 or more, the strength and durability of the molded body are improved, and if it is 200,000 or less, the workability during molding such as fluidity is improved.

  The “ionic liquid” according to the present invention comprises a cation component and an anion component, and may exist as a liquid even at 100 ° C. or lower, preferably 80 ° C. or lower, more preferably 60 ° C. or lower, and even more preferably 0 ° C. or lower. Any known salt can be used without particular limitation.

As an anion component in the ionic liquid, N (CF ₃ SO ₂ ) ²⁻ , C (CF ₃ O ₂ ) ₃ ⁻ , CF ₃ SO ₃ ⁻ , C ₂ F ₅ SO ₃ −, C ₃ F ₇ SO ₃ −, C ₄ F ₉ SO ₃ −, BF ₄ −, PF ₆ −, Al ₃ Cl ₈ ⁻ , Al ₂ Cl ₇ ⁻ , AlCl ₄ ⁻ and ClO ₄ ^{− and the} like include fluorine in the chemical structure of the anion. An anion is more preferable because it is excellent in terms of the effect of improving the light emission characteristics.

  Examples of the cation component in the ionic liquid include an alicyclic amine cation, an aliphatic amine cation, an alkali metal ion, an imidazolium cation, a pyridium cation, and a phosphine cation.

  For example, trimethylpropylammonium bis (trifluoromethanesulfonyl) imide, 1-butyl-1-methylpyrrolidinium (trifluoromethanesulfonyl) imide, 1-butyl-2,3-dimethylimidazolium manufactured by Tokyo Chemical Industry Co., Ltd. Hexafluorophosphate, tributyl (2-methoxyethyl) phosphonium bis (trifluoromethanesulfonyl) imide, 1-ethyl-3-methylpyridinium bis (trifluoromethanesulfonyl) imide, and aliphatic amine-based ionic liquid IL manufactured by Guangei Chemical Industry Co., Ltd. -A1, IL-A2, IL-A3, IL-A4, IL-A5, IL-A12, alicyclic amine-based ionic liquid IL-C1, IL-C3, IL-C5, IL-C6, pyridine-based IL- P14, IL-P18, imidazolium-based Io Liquid IL-IM1, IL-IM2, IL-IM3, Phosphorus ionic liquid IL-AP1, IL-AP3, Reactive ionic liquid IL-S2, IL-S3, IL-S4, IL-MA1, IL-MA2, IL -MA3, IL-OH1, IL-OH2, IL-OH7, IL-OH8, IL-OH9, etc. can be used.

  The addition amount of the ionic liquid (B) is 0.0005 to 5 parts by mass, preferably 0.001 to 3 parts by mass, more preferably 0.005 to 1 part by mass with respect to 100 parts by mass of the thermoplastic resin (A). Part. If the addition amount of the ionic liquid (B) is too small, a sufficient emission intensity amplification effect for the luminescent dye (C) cannot be obtained, and if it is too large, the ionic liquid (C) acts as a plasticizer, This is not appropriate because there is a possibility that a decrease or molding failure may occur, and further, bleedout of the ionic liquid (C) to the surface of the molded body may occur.

  The luminescent dye (C) used in the present invention is a luminescent dye that emits light having a wavelength of 400 to 1000 nm when irradiated with light having a wavelength of 200 nm to 800 nm in the ultraviolet to visible light region. For example, a rhodamine derivative , Fluorescein derivatives, cyanine derivatives, pyrene derivatives, coumarin derivatives, perylene derivatives, dansyl derivatives, oxazole derivatives, dicyanomethylene compounds, quinacridone compounds, benzopyran derivatives, rhodamine derivatives, benzothioxanthene derivatives, polyalkylthiophene derivatives, perimidone derivatives, anthracene Organic compounds such as organic compounds, distyryl derivatives, polydialkylfluorene derivatives, polyparaphenylene derivatives, Tb complex compounds, Eu complex compounds, Sm complex compounds, Pr complex compounds, and Pr complex compounds. It is but, considering the strength and versatility of fluorescence emitted, with preference rhodamine derivatives. Further, the luminescent dye (B) may be used in combination of two or more kinds of dyes.

  The addition amount of the luminescent pigment (C) is 0.005 to 5 parts by mass, preferably 0.0075 to 3 parts by mass, more preferably 0.01 to 1 with respect to 100 parts by mass of the thermoplastic resin (A). Part by mass. If the addition amount of the luminescent dye (C) is too small, sufficient emission intensity cannot be obtained, and if it is too much, the transparency is impaired, or the dye that has not dissolved on the molding surface is unevenly distributed. In some cases, the appearance may be deteriorated, and the molecular weight and thermal stability of the thermoplastic resin (A) may be reduced.

  Furthermore, 0.1-200 are preferable, as for the mass ratio of the addition amount of the ionic liquid (B) with respect to a luminescent pigment | dye (C), More preferably, it is 0.2-50, More preferably, it is 1-30. When the mass ratio of the addition amount is less than 0.1, the light emission amplification effect of the luminescent dye (C) by the ionic liquid (B) is not sufficient, and the addition amount of the ionic liquid (B) and the luminescent dye (C) is not sufficient. If the ratio is 100 or more, the luminescent dye (C) necessary for obtaining sufficient luminescent properties cannot be added to the thermoplastic resin, or the amount of the ionic liquid (B) added is excessively increased and the moldability is lowered. This is inappropriate.

[Other additives]
The luminescent thermoplastic resin composition of the present invention may contain one or more selected from various additives within a range not impairing the effects of the present invention. Examples of such an additive include an additive selected from the group consisting of a flame retardant, a heat stabilizer, an antioxidant, an ultraviolet absorber, and a release agent.

[Production method]
The light-emitting thermoplastic resin composition of the present invention can be produced by mixing and kneading each component by a conventionally known method. As a specific mixing method, a predetermined amount of thermoplastic resin (A), ionic liquid (B), luminescent dye (C) and other additive components blended as required is weighed, and a tumbler, a Henschel mixer, etc. Examples thereof include a method of melting and kneading using a Banbury mixer, a roll, a plastic pendder, a single-screw kneading extruder, a twin-screw kneading extruder, a kneader, and the like after mixing using the above various mixers.

[Molding method]
The resin composition of the present invention is used as a resin material for production (molding) of various products (molded products). As the molding method, a conventionally known method of molding a molded product from a thermoplastic resin material can be applied without limitation. Specifically, general injection molding methods, ultra-high speed injection molding methods, injection compression molding methods, two-color molding methods, hollow molding methods such as gas assist, molding methods using heat insulating molds, rapid heating molds Molding method used, foam molding (including supercritical fluid), insert molding, in-mold coating (IMC) molding method, extrusion molding method, sheet molding method, thermoforming method, rotational molding method, laminate molding method, press molding method Etc.

[Temperature conditions during melt-kneading and molding]
In the present invention, some luminescent dyes have low thermal stability. Therefore, the temperature conditions during melt kneading and the temperature conditions during molding of the resin composition of the present invention depend on the thermal stability of the luminescent dye used. It is important to adjust accordingly.

  For example, when a rhodamine derivative, a coumarin compound, or a perylene compound is used as the luminescent dye (C), the temperature conditions at the time of melt kneading and molding are 100 to 400 ° C., more preferably 200 to 300 ° C. Although general temperature conditions can be adopted as the temperature conditions at the time of melt kneading and molding of the composition, when a rare-earth complex compound having low thermal stability is used as the luminescent dye (C), at the time of melt kneading and molding. It is preferable to set the temperature condition of the hour to 220 to 260 ° C. slightly lower.

Hereinafter, the present invention will be described more specifically with reference to examples and comparative examples. However, the present invention is not limited to these examples as long as the gist thereof is not exceeded.
In addition, the structural component of the resin composition used in the Example and the comparative example is as follows.

Quantum Yield Measurement A test piece cut out to a size of 10 mm × 10 mm × 2 mm from the obtained molded body is placed in an integrating sphere of an absolute quantum yield measuring apparatus (trade name: PE-1100, manufactured by Otsuka Electronics Co., Ltd.). The emission spectrum for each excitation wavelength was measured by changing the excitation light at intervals of 10 nm in the excitation wavelength range of 300 to 500 nm. After the measurement, the emission peak wavelength was specified from the obtained data, and the internal quantum yield and the external quantum yield were calculated. The internal quantum yield is a value obtained by dividing the number of photons derived from light emission from the molded piece by the number of photons absorbed by the molded piece out of the number of photons of excitation light. The external quantum yield is a value obtained by dividing the number of photons derived from light emission from the molded piece by the number of photons of excitation light.

Transmittance measurement The transmittance of the obtained molded body (10 mm × 20 mm × 1.5 mm) was measured using a spectrophotometer (model name “U-3300”, manufactured by Hitachi, Ltd.) with a wavelength of 250 to 800 nm. Measured in range. The transmittance values at 700 nm are shown in Table 1.

Fabrication of solar cell module On the hot plate of a solar cell module laminator (manufactured by NPC Corporation, LM-50X50-S), molded bodies obtained in Examples and Comparative Examples, 150 mm square sealing material (EVA, 0. 45 mm thickness, CI Kasei Co., Ltd.), single-cell solar cells connected in series (5 inches, polycrystalline silicon solar cells, manufactured by Asden), 150 mm square sealing material (EVA, 0.45 mm thickness, manufactured by CI Kasei), A solar cell module is formed by sequentially stacking 150 mm square back surface protection members between 500 mm square release films and vacuum bonding them at 135 ° C. for 15 minutes under a vacuum at a press pressure of 101.3 kPa. Obtained.

Measurement of power generation efficiency The power generation characteristics of the solar cell module were measured using a module tester NMT-50x50-20MS (manufactured by NPC Corporation), and the open circuit voltage, short circuit current, and power generation efficiency were evaluated. The measurement environment was a constant temperature room at 25 ° C. under room humidity, and the irradiation intensity was measured with light of 1000 W / m ² .

Example 1
0.05 parts by mass of ionic liquid trimethylpropylammonium bis (trifluoromethanesulfonyl) imide (manufactured by Tokyo Chemical Industry Co., Ltd.) with respect to 100 parts by mass of polymethyl methacrylate resin beads (VHK manufactured by Mitsubishi Rayon Co., Ltd.), luminescence 0.02 part by mass of dye rhodamine 6G (manufactured by Tokyo Chemical Industry Co., Ltd.) was added and dry blended. Then, the dry blended mixture is melt kneaded using a single screw extruder (30 mmΦ single screw extruder, Thermo Plastics Industry Co., Ltd.) at an extrusion temperature of 240 ° C., and the extruded strand is cut into pellets. A light-emitting thermoplastic composition comprising a methacrylate resin, an ionic liquid, and a light-emitting pigment was obtained.

  The thermoplastic resin composition was molded using an injection molding machine (trade name “IS100EN” manufactured by Toshiba Machine Plastic Engineering Co., Ltd.) to obtain a sheet of 150 mm × 150 mm × thickness 2 mm. This sheet was used as a test piece. The evaluation results are shown in Table 1.

Examples 2-9, Comparative Examples 1-2
Except having changed the kind and quantity of an ionic liquid (B) and a luminescent pigment | dye (C) as described in Table 1, it carried out similarly to Example 1 and obtained the molded object.

Comparative Example 1
Except having changed the kind and quantity of ionic liquid (B) and luminescent pigment | dye (C), and molding temperature as shown in Table 1, it carried out similarly to Example 1 and obtained the molded object. However, since the molded body obtained in Comparative Example 1 has a large amount of ionic liquid added, the thermal stability is lowered, and the molded body is deformed in the laminating process when the module is manufactured. As a result, power generation efficiency could not be evaluated.

Comparative Example 2
Except having changed the kind and quantity of ionic liquid (B) and luminescent pigment | dye (C), and molding temperature as shown in Table 1, it carried out similarly to Example 1 and obtained the molded object. However, since the molded product obtained in Comparative Example 2 contains an ionic liquid and a luminescent dye, the transparency is good, but since the amount of the luminescent dye added is insufficient, the quantum yield is low. .

PMMA: Polymethyl methacrylate resin (VHK manufactured by Mitsubishi Rayon Co., Ltd.)
MS: Methyl methacrylate / styrene copolymer resin (BR-52 manufactured by Mitsubishi Rayon Co., Ltd.)
PS: Polystyrene resin (Toyostyrene GP G200C manufactured by Toyo Styrene Co., Ltd.)
IL-01: Trimethylpropylammonium bis (trifluoromethanesulfonyl) imide (manufactured by Tokyo Chemical Industry Co., Ltd.)
IL-02: 1-butyl-1-methylpyrrolidinium (trifluoromethanesulfonyl) imide (manufactured by Tokyo Chemical Industry Co., Ltd.)
IL-03: 1-butyl-2,3-dimethylimidazolium hexafluorophosphate (manufactured by Tokyo Chemical Industry Co., Ltd.)
IL-04: Tributyl (2-methoxyethyl) phosphonium bis (trifluoromethanesulfonyl) imide (manufactured by Tokyo Chemical Industry Co., Ltd.)
IL-05: 1-ethyl-3-methylpyridinium bis (trifluoromethanesulfonyl) imide (manufactured by Tokyo Chemical Industry Co., Ltd.)
OD-01: Rhodamine 6G (manufactured by Tokyo Chemical Industry Co., Ltd.) (CAS number: 989-38-8)
OD-02: Rhodamine B (manufactured by Nacalai Tesque) (CAS number: 81-88-9)

  As is clear from Table 1, the molded article using the luminescent thermoplastic resin composition of the present invention has excellent luminescent properties (high internal quantum yield and high external quantum yield), high transparency, and moldability. It was confirmed that it was favorable and suitable as a solar cell topsheet and module. (Examples 1-4)

The composition, molded product, top sheet, module, and the like according to the present invention have the light emitting characteristics and transparency important for improving the power generation efficiency without deterioration of the molding processability of the thermoplastic resin. It can be widely used in various fields that require photoelectric conversion.
(Aspect)
(Aspect 1)
It contains 0.0005 to 5 parts by mass of ionic liquid (B) and 0.005 to 5 parts by mass of luminescent dye (C) with respect to 100 parts by mass of thermoplastic resin (A), and luminescent dye (C The luminescent thermoplastic resin composition whose mass ratio of the ionic liquid (B) is 0.1-200.
(Aspect 2)
The light-emitting thermoplastic resin composition according to aspect 1, wherein the thermoplastic resin (A) is a (meth) acrylic resin.
(Aspect 3)
The ionic liquid (B) is at least one selected from the group consisting of alicyclic amine ionic liquids, aliphatic amine ionic liquids, amidine ionic liquids, imidazolium ionic liquids, pyridium ionic liquids, and phosphine ionic liquids. The light-emitting thermoplastic resin composition according to aspect 1 or 2, wherein
(Aspect 4)
The luminescent thermoplastic resin composition according to any one of Embodiments 1 to 3, wherein the luminescent dye (C) is a luminescent dye having an emission peak wavelength of 400 to 1000 nm.
(Aspect 5)
The luminescent thermoplastic resin composition according to any one of Embodiments 1 to 4, wherein the luminescent dye (C) is a rhodamine dye.
(Aspect 6)
The manufacturing method of a luminescent thermoplastic resin composition including the process of knead | mixing the luminescent thermoplastic resin composition as described in any one of aspects 1-5 at the temperature of 100-400 degreeC.
(Aspect 7)
The molded object which consists of a luminescent thermoplastic resin composition as described in any one of aspect 1-5, or was manufactured by the manufacturing method of aspect 6.
(Aspect 8)
A light emitting body comprising the molded body according to aspect 7.
(Aspect 9)
A top sheet for a solar cell comprising the light emitter according to the eighth aspect.
(Aspect 10)
A solar cell module comprising the light emitter according to aspect 8.

Claims (3)

It contains 0.0005 to 5 parts by mass of ionic liquid (B) and 0.005 to 5 parts by mass of luminescent dye (C) with respect to 100 parts by mass of thermoplastic resin (A), and luminescent dye (C ) The mass ratio of the ionic liquid (B) to 0.1-200,
The luminescent dye (C) is Ri luminescent dye der having a peak emission wavelength at 400 to 1000 nm, and,
The luminescent dye (C) is Ru der rhodamine dyes, luminescent thermoplastic resin composition.   The luminescent thermoplastic resin composition according to claim 1, wherein the thermoplastic resin (A) is a (meth) acrylic resin.   The ionic liquid (B) is at least one selected from the group consisting of alicyclic amine ionic liquids, aliphatic amine ionic liquids, amidine ionic liquids, imidazolium ionic liquids, pyridium ionic liquids, and phosphine ionic liquids. The light-emitting thermoplastic resin composition according to claim 1 or 2.