Resin composition, resin film, wavelength conversion film, and solar cell

Abstract

To provide a resin composition capable of yielding a wavelength conversion film having enhanced transparency.SOLUTION: A resin composition includes: a norbornene-based resin (A); and a wavelength conversion material (B). The norbornene-based resin (A) contains a structural unit represented by the following formula (1).SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a resin composition, a resin film, a wavelength conversion film, and a solar cell.

Background Art

[0002] As a technology related to a wavelength conversion film, for example, the technology described in Patent Document 1 can be mentioned.

[0003] Patent Document 1 describes a polymer composition characterized by containing a wavelength conversion material, a layered compound, and a polymer. According to the polymer composition of Patent Document 1, it is described that a polymer composition excellent in wavelength conversion function and light resistance can be provided when formed into a film.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The present invention provides a resin composition capable of obtaining a wavelength conversion film with improved transparency.

Means for Solving the Problems

[0006] According to the present invention, the following resin composition, resin film, wavelength conversion film, and solar cell are provided.

[0007] [1] A resin composition comprising a norbornene resin (A) and a wavelength conversion substance (B), wherein the norbornene resin (A) contains a structural unit represented by the following formula (1).

Chemical Formula

[10] The resin composition according to [9], wherein the wavelength conversion film is a film capable of being used for a solar cell.

[11] A resin film comprising the resin composition according to any one of [1] to

[10] .

[12] The resin film according to

[11] , having a thickness of 5 μm or more and 100 μm or less.

[13] The resin film according to

[11] or

[12] , having a total light transmittance measured in accordance with JIS K7361-1:1997 of 85.00% or more.

[14] The resin film according to any one of

[11] to

[13] , having a haze value measured in accordance with JIS K7136:2000 of 3.00% or less.

[15] A wavelength conversion film comprising the resin film according to any one of

[11] to

[14] .

[16] A solar cell comprising the wavelength conversion film according to

[15] . [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a resin composition capable of obtaining a wavelength conversion film with improved transparency. [Embodiments for Carrying Out the Invention]

[0009] Hereinafter, embodiments of the present invention will be described. The numerical range "A to B" represents A or more and B or less unless otherwise specified.

[0010] In recent years, the demand for solar cells has been increasing in order to achieve carbon neutrality and a decarbonized society. Among them, from the viewpoint of being able to be installed in any place, it is required to improve the transparency of solar cells. A wavelength conversion film may be provided in a solar cell in order to further improve the conversion efficiency. And it is required to improve the transparency of the wavelength conversion film. The present invention provides a resin composition capable of obtaining a wavelength conversion film with improved transparency.

[0011] [Resin composition] The resin composition of the present embodiment contains a norbornene resin (A) and a wavelength conversion substance (B), and the norbornene resin (A) contains a structural unit represented by the formula (1).

[0012] The total light transmittance of the resin composition of the present embodiment is preferably 85.00% or more, more preferably 87.00% or more, still more preferably 90.00% or more from the viewpoint of further improving transparency, and the upper limit value is not particularly limited. For example, it may be 99.00% or less, 97.00% or less, 95.00% or less, or 93.00% or less. When the resin composition is in varnish form, the total light transmittance of the resin composition of the present embodiment means the value of the total light transmittance measured in accordance with JIS K7361-1:1997 using a resin film with a thickness of 30 μm formed from the varnish-like resin composition as a measurement sample. When the resin composition is in film form, film form or sheet form, the total light transmittance of the resin composition of the present embodiment means the value of the total light transmittance measured in accordance with JIS K7361-1:1997.

[0013] The haze value of the resin composition of the present embodiment is preferably 3.00% or less, more preferably 2.50% or less, still more preferably 2.00% or less, and still more preferably 1.80% or less from the viewpoint of further improving transparency. The lower limit is not particularly limited, and may be, for example, 0.10% or more, or 0.30% or more. When the resin composition is in a varnish form, the haze value of the resin composition of the present embodiment means the value of the haze value measured in accordance with JIS K7136:2000 using a resin film with a thickness of 30 μm formed from the varnish-like resin composition as a measurement sample. When the resin composition is in a film form, a film shape, or a sheet form, the haze value of the resin composition of the present embodiment means the value of the haze value measured in accordance with JIS K7136:2000.

[0014] The resin composition of the present embodiment is preferably a resin composition that can be used for a wavelength conversion film. The wavelength conversion film may be, for example, a film that can be used for a solar cell or a film that can be used for an agricultural greenhouse, but is preferably a film that can be used for a solar cell.

[0015] The shape of the resin composition of the present embodiment is not particularly limited, and examples thereof include a varnish form, a film form, a film shape, and a sheet form.

[0016] Hereinafter, each constituent component of the resin composition of the present embodiment will be described.

[0017] <Norbornene resin (A)> The resin composition of the present embodiment contains a norbornene resin (A), and the norbornene resin (A) contains a structural unit represented by the formula (1).

[0018]

Chemical formula

[0019] In formula (1), R 1 , R2 , R 3 , and R 4 is each independently any one selected from the group consisting of a hydrogen atom and an organic group containing a polar group, and R 1 , R 2 , R 3 , and R 4 at least one selected from the group consisting of is an organic group containing a polar group. In formula (1), R 1 , R 2 and R 3 are all hydrogen atoms, and R 4 is preferably an organic group containing a polar group.

[0020] In formula (1), the organic group containing a polar group is not particularly limited, but from the viewpoint of further improving the compatibility with the wavelength conversion substance (B) and further improving the film-forming property of the resin composition, it preferably contains at least one selected from the group consisting of a group containing an ester group, a group containing a formyl group, a group containing a carbonyl group, a group containing a carboxy group, and a group containing a hydroxy group, and more preferably is a group containing an ester group. Here, the group containing a polar group is a concept including a group composed only of the polar group. For example, the group containing an ester group is a concept including an ester group.

[0021] The structural unit represented by formula (1) preferably contains the structural unit represented by formula (1-a).

[0022] [Chemical formula]

[0023] In formula (1-a), R 11 represents an alkyl group having 1 to 10 carbon atoms. In formula (1-a), R 11 is preferably an alkyl group having 1 to 6 carbon atoms, more preferably an alkyl group having 1 to 4 carbon atoms, still more preferably a methyl group or an ethyl group, and still more preferably a methyl group.

[0024] The norbornene resin (A) may contain structural units other than the structural unit represented by formula (1). Examples of the structural units other than the structural unit represented by formula (1) include structural units derived from cyclic olefin compounds other than the structural unit represented by formula (1), structural units derived from maleimide compounds, structural units derived from maleic acid compounds, structural units derived from compounds having an ethylenic double bond, and the like.

[0025] When the total of all the structural units in the norbornene resin (A) is 100 mol%, the content of the structural unit represented by formula (1) in the norbornene resin (A) is preferably 50 mol% or more, more preferably 60 mol% or more, still more preferably 70 mol% or more, still more preferably 80 mol% or more, still more preferably 90 mol% or more, still more preferably 95 mol% or more, still more preferably 97 mol% or more, and is, for example, 100 mol% or less.

[0026] From the viewpoint of further improving the film-forming property of the resin composition, the weight average molecular weight (Mw) of the norbornene resin (A) is preferably 20,000 or more, more preferably 50,000 or more, still more preferably 100,000 or more, still more preferably 150,000 or more, still more preferably 200,000 or more, and is preferably 1,000,000 or less, more preferably 750,000 or less, still more preferably 500,000 or less, still more preferably 400,000 or less, still more preferably 350,000 or less.

[0027] The number average molecular weight (Mn) of the norbornene resin (A) is preferably 10,000 or more, more preferably 30,000 or more, still more preferably 50,000 or more, still more preferably 70,000 or more, and is preferably 200,000 or less, more preferably 150,000 or less, still more preferably 100,000 or less.

[0028] The molecular weight distribution (Mw / Mn) of the norbornene resin (A) is preferably 1.10 or more, more preferably 1.50 or more, still more preferably 2.00 or more, even more preferably 2.50 or more, and preferably 5.00 or less, more preferably 4.50 or less, still more preferably 4.00 or less, even more preferably 3.50 or less, even more preferably 3.30 or less.

[0029] The weight average molecular weight (Mw), number average molecular weight (Mn), and molecular weight distribution (Mw / Mn) of the norbornene resin (A) can be determined by gel permeation chromatography (GPC) using polystyrene as a standard substance.

[0030] When the total of the non-volatile components in the resin composition is 100% by mass, the content of the norbornene resin (A) in the resin composition of this embodiment is preferably 70% by mass or more, more preferably 80% by mass or more, still more preferably 85% by mass or more, even more preferably 88% by mass or more, and, for example, less than 100% by mass, preferably 99.9% by mass or less, more preferably 99.5% by mass or less.

[0031] The norbornene resin (A) can be produced, for example, by a known method. More specifically, it can be produced by polymerizing monomers capable of forming each structural unit by any method. Examples of the monomer capable of forming the structural unit represented by the formula (1) include bicyclo[2.2.1]hept-5-en-2-methanol, 2-acetate, and the like.

[0032] The norbornene resin (A) may be a single norbornene resin or may contain two or more norbornene resins.

[0033] <Wavelength conversion substance (B)> The resin composition of this embodiment contains a wavelength conversion substance (B). The wavelength conversion substance (B) contains at least one selected from the group consisting of, for example, pyran compounds, rare earth complexes, organic dyes, organic phosphors, and inorganic phosphors, etc., and preferably contains at least one selected from the group consisting of pyran compounds and rare earth complexes.

[0034] The rare earth complex contains at least one selected from the group consisting of, for example, europium complexes, ytterbium complexes, neodymium complexes, samarium complexes, and terbium complexes, etc., preferably contains at least one selected from the group consisting of europium complexes, ytterbium complexes and neodymium complexes, and more preferably contains at least one selected from the group consisting of europium complexes and ytterbium complexes.

[0035] The ligand of the rare earth complex is not particularly limited, but preferably contains at least one selected from the group consisting of β-diketonato and phosphine oxide with a specific substituent introduced on the phosphorus atom.

[0036] The rare earth complex preferably contains at least one selected from the group consisting of the rare earth complex represented by formula (B-1) and the rare earth complex represented by formula (B-2).

[0037]

Chemical formula

[0038]

Chemical formula

[0039] In formula (B-2), x represents 3, and y represents an integer of 1 or more and 3 or less. In formula (B-2), y preferably represents 2.

[0040] When the total content of the non-volatile components in the resin composition of the present embodiment is 100% by mass, the content of the wavelength conversion substance (B) in the resin composition is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, and preferably 15% by mass or less, more preferably 12% by mass or less.

[0041] The wavelength conversion substance (B) may be a single wavelength conversion substance or may contain two or more wavelength conversion substances.

[0042] <Other components> The resin composition of the present embodiment may appropriately contain other components other than the norbornene resin (A) and the wavelength conversion substance (B). Examples of the other components include organic solvents, antioxidants, surfactants, leveling agents, storage stabilizers, fillers, and the like. The content of the other components is an appropriate amount.

[0043] When the resin composition of the present embodiment contains an organic solvent, it becomes a varnish-like resin composition. When the resin composition of the present embodiment contains an organic solvent, the concentration of the solid content (non-volatile component) in the resin composition is preferably 8% by mass or more, more preferably 10% by mass or more, still more preferably 12% by mass or more, and preferably 40% by mass or less, more preferably 35% by mass or less, still more preferably 30% by mass or less, still more preferably 25% by mass or less, from the viewpoint of further improving the coatability of the resin composition.

[0044] When the total content of the norbornene resin (A) and the wavelength conversion substance (B) in the resin composition of the present embodiment is 100% by mass of the total non-volatile components in the resin composition, it is preferably 70% by mass or more, more preferably 80% by mass or more, still more preferably 90% by mass or more, still more preferably 95% by mass or more, still more preferably 97% by mass or more, and, for example, 100% by mass or less.

[0045] The resin composition of the present embodiment can be obtained, for example, by mixing each component.

[0046] [Resin film] The resin film of the present embodiment is made of the resin composition of the present embodiment.

[0047] From the viewpoint of further improving handleability, the thickness of the resin film of the present embodiment is preferably 5 μm or more, more preferably 10 μm or more, still more preferably 15 μm or more, still more preferably 20 μm or more, still more preferably 25 μm or more, and from the viewpoint of further improving transparency, it is preferably 100 μm or less, more preferably 80 μm or less, still more preferably 60 μm or less, still more preferably 50 μm or less, still more preferably 45 μm or less.

[0048] From the viewpoint of further improving transparency, the total light transmittance of the resin film of the present embodiment measured in accordance with JIS K7361-1:1997 is preferably 85.00% or more, more preferably 87.00% or more, still more preferably 90.00% or more, and although the upper limit is not particularly limited, for example, it may be 99.00% or less, 97.00% or less, 95.00% or less, 93.00% or less.

[0049] From the viewpoint of further improving transparency, the haze value of the resin film of the present embodiment measured in accordance with JIS K7136:2000 is preferably 3.00% or less, more preferably 2.50% or less, still more preferably 2.00% or less, still more preferably 1.80% or less, and although the lower limit is not particularly limited, for example, it may be 0.10% or more, 0.30% or more.

[0050] The method for producing the resin film of the present embodiment is not particularly limited, and examples thereof include a method of obtaining the resin film of the present embodiment by applying a varnish-like resin composition of the present embodiment on a base film, drying it, and then peeling off the base film.

[0051] [Wavelength conversion film] The wavelength conversion film of the present embodiment includes the resin film of the present embodiment.

[0052] The wavelength conversion film of the present embodiment may be a film having a single-layer structure composed only of the resin film of the present embodiment, or may be a film having a multilayer structure including the resin film of the present embodiment and other layers. Examples of the other layers include a gas barrier layer, an adhesive layer, and the like.

[0053] The wavelength conversion film of the present embodiment may be, for example, a film that can be used for a solar cell, or a film that can be used for an agricultural greenhouse, but preferably a film that can be used for a solar cell.

[0054] [Solar cell] The solar cell of the present embodiment includes the wavelength conversion film of the present embodiment. The solar cell of the present embodiment is, for example, a solar cell in which a wavelength conversion film is laminated on a solar cell module. The solar cell of the present embodiment may be a solar cell provided with an arbitrary layer between the solar cell module and the wavelength conversion film.

[0055] The solar cell module of the present embodiment may be a flexible type or a rigid type, but preferably a flexible type. When the solar cell module of the present embodiment is of a flexible type, the solar cell of the present embodiment can be applied in more places.

[0056] The installation location of the solar cell of the present embodiment is not particularly limited, and examples include the wall surface of a building, the window of a building, the roof of a building, a wearable device, an automobile, etc. Among them, preferably it is the window of a building.

[0057] As described above, the embodiments of the present invention have been described, but these are examples of the present invention, and various configurations other than those described above can also be adopted. Furthermore, the present invention is not limited to the above-described embodiments, and modifications, improvements, etc. within the scope capable of achieving the object of the present invention are included in the present invention.

Example

[0058] Hereinafter, this embodiment will be described in detail based on examples. Note that this embodiment is not limited to the descriptions of these examples at all.

[0059] [Raw materials] (Synthesis of norbornene resin (A-1)) (Preparation of catalyst solution) In a glass container that had been made into a nitrogen atmosphere with moisture removed in advance, 0.0399 g (0.000033 mol) of (acetato-κO)(acetonitrile)bis[tris(1-methylethyl)phosphine]palladium(I)tetrakis(2,3,4,5,6-pentafluorophenyl)borate and 8.4 g of butyl deacetate were added, and after stirring and dissolving at room temperature for 1 hour, then 0.0658 g (0.000082 mol) of N,N-dimethylanilinium tetrakis(pentafluorophenyl)borate was added and stirred for another 30 minutes, and the solution was filtered through a filter to obtain a catalyst solution.

[0060] (Synthesis of resin) In a reaction vessel of an appropriate size equipped with a stirrer and a condenser, 436 g (2.6 mol) of bicyclo[2.2.1]hept-5-en-2-ylmethanol, 2-acetate was weighed and dissolved in 1,000 g of butyl acetate. After removing the dissolved oxygen in the system by nitrogen bubbling for this solution, while stirring, when the internal temperature reached 90°C, the previously prepared catalyst solution was added, and the reaction was carried out while maintaining the internal temperature at 90°C for 16 hours. Thereby, a bicyclo[2.2.1]hept-5-en-2-ylmethanol, 2-acetate polymer was obtained. Next, after cooling the above solution to room temperature and reprecipitating it using a large amount of methanol, the precipitate was collected by filtration and dried in a vacuum dryer to obtain 305 g of a white powder (polymer), that is, norbornene resin (A-1). The weight-average molecular weight (Mw) of the obtained norbornene-based resin (A-1) was 260,000, the number-average molecular weight (Mn) was 87,000, and the molecular weight distribution (PDI: Mw / Mn) was 2.99.

[0061] For the weight-average molecular weight (Mw), number-average molecular weight (Mn), and molecular weight distribution (PDI: Mw / Mn) of the norbornene-based resin, polystyrene-converted values obtained from the calibration curve of standard polystyrene (PS) obtained by GPC measurement are used. The measurement conditions are as follows. Measuring device: Gel Permeation Chromatography device HLC-8320GPC manufactured by Tosoh Corporation Column: TSK-GEL Supermultipore HZ-M manufactured by Tosoh Corporation Detector: RI detector for liquid chromatogram Measurement temperature: 40 °C Solvent: THF Sample concentration: 2.0 mg / mL

[0062] <Synthesis of wavelength conversion substance (B-2)> Under an argon atmosphere, dichloromethane (15.0 g) was added to europium acetate n-hydrate (560 mg as 2.5 hydrate, 1.50 mmol) and tricyclohexylphosphine oxide (890 mg, 3.00 mmol), and the mixture was stirred at room temperature for 1 hour. A dichloromethane solution (1.8 M, 2.5 mL, 4.5 mmol) of hexafluoroacetylacetone (hereinafter also referred to as hfa) was added dropwise to the reaction mixture, and then the mixture was stirred at room temperature for 3 hours. The reaction solution was concentrated under reduced pressure and recrystallized from dichloromethane / methanol to obtain a white solid of bis(tricyclohexylphosphine oxide)tris(hexafluoroacetylacetonato)europium(III) (Eu[hfa]3[TCyPO]2). The obtained white solid was used as the wavelength conversion substance (B-2).

[0063] <Synthesis of wavelength conversion substance (B-3)> Under an argon atmosphere, water (5.0 mL) was added to ytterbium acetate n-hydrate (593 mg as the dihydrate, 1.50 mmol), and after dissolution, hfa (1030 mg, 4.95 mmol) was added, followed by stirring at room temperature for 3 hours. The reaction solution was filtered and dried under reduced pressure to obtain a white solid intermediate product. To the obtained intermediate product (374 mg, 0.45 mmol), tricyclohexylphosphine oxide (222 mg, 0.75 mmol) and methanol (7.5 g) were added, and the mixture was stirred at 65 °C for 16 hours. The reaction solution was filtered and dried under reduced pressure to obtain a white solid of Yb[hfa] x [TCyPO] y . The obtained white solid was used as the wavelength conversion substance (B-3).

[0064] The details of the raw materials of each component in Table 1 are as follows.

[0065] <Norbornene resin (A)> (A-1) The norbornene resin synthesized above (resin represented by the following formula (A-1))

[0066] [Chemical formula]

[0067] <Wavelength conversion substance (B)> (B-1) Pyran compound (manufactured by Yamada Chemical Industry Co., Ltd., product name: EM-016) (B-2) The wavelength conversion substance (B-2) (Eu[hfa]3[TCyPO]2) synthesized above (B-3) The wavelength conversion substance (B-3) (Yb[hfa] x [TCyPO] y )

[0068] [Example 1] The norbornene resin (A) and the wavelength conversion substance (B) were weighed according to the formulation described in Table 1, and butyl acetate was added to give a mixture with a solid content concentration of 15% by mass. The mixture was stirred under the conditions of 60 °C for 3 hours, and defoaming was carried out using a planetary mixer at 1600 rpm for 5 minutes to obtain the varnish-like resin composition of Example 1.

[0069] A varnish-like resin composition was applied onto a polyethylene terephthalate substrate using an applicator, and then heated on a hot plate to remove butyl acetate. Subsequently, the polyethylene terephthalate substrate was peeled off to obtain the resin film of Example 1. The thickness of the resin film of Example 1 is shown in Table 1.

[0070] [Examples 2 - 8] The norbornene resin (A) and the wavelength conversion substance (B) were weighed according to the formulation described in Table 1, and butyl acetate was added to form a mixture with a solid content concentration of 20% by mass. The mixture was stirred under the conditions of 80°C for 3 hours, and degassed using a planetary mixer at a revolution speed of 1600 rpm, a rotation speed of 1600 rpm for 2 minutes, and further degassed at a revolution speed of 1600 rpm and a rotation speed of 200 rpm for 4 minutes to obtain the varnish-like resin compositions of Examples 2 - 8, respectively.

[0071] The resin films of Examples 2 - 8 were obtained in the same manner as in Example 1. The thicknesses of the resin films of Examples 2 - 8 are shown in Table 1, respectively.

[0072] [Measurement and Evaluation] <Total Light Transmittance> For the resin films of Examples 1 - 8, in accordance with JIS K7361-1:1997, the total light transmittance was measured for each using a haze meter (manufactured by Nippon Denshoku Industries Co., Ltd., product name: HAZE METER NDH5000). The total light transmittances of the resin films of Examples 1 - 8 are shown in Table 1, respectively.

[0073] <Haze Value> For the resin films of Examples 1 - 8, in accordance with JIS K7136:2000, the haze value was measured for each using a haze meter (manufactured by Nippon Denshoku Industries Co., Ltd., product name: HAZE METER NDH5000). The haze values of the resin films of Examples 1 - 8 are shown in Table 1, respectively.

[0074] <Fluorescence Analysis> Using an absolute PL quantum yield measurement device (manufactured by Hamamatsu Photonics, product name: C9920-02G), the fluorescence spectrum was measured when the resin film of Example 2 was irradiated with excitation light having a wavelength of 369 nm. The peak of the obtained fluorescence spectrum was at a wavelength of 465 nm. That is, it was confirmed that the resin film of Example 2 can convert light with a wavelength of 369 nm into light with a wavelength of 465 nm. The emission quantum yield was 44.4%.

[0075] Using an absolute PL quantum yield measurement device (manufactured by Hamamatsu Photonics, product name: C9920-02G), the fluorescence spectrum was measured when the resin film of Example 3 was irradiated with excitation light having a wavelength of 305 nm. The peak of the obtained fluorescence spectrum was at a wavelength of 614 nm. That is, it was confirmed that the resin film of Example 3 can convert light with a wavelength of 305 nm into light with a wavelength of 614 nm. The emission quantum yield was 44.5%.

[0076] Using a modular fluorescence spectroscopic measurement device (manufactured by Horiba, Ltd., product name: Fluorolog-NIR), the fluorescence spectrum was measured when the resin film of Example 6 was irradiated with excitation light having a wavelength of 300 nm. The peaks of the obtained fluorescence spectrum were at wavelengths of 976 nm and 1030 nm. That is, it was confirmed that the resin film of Example 6 can convert light with a wavelength of 300 nm into light with wavelengths of 976 nm and 1030 nm.

[0077]

Table 1

[0078] It can be understood from Table 1 that the resin films of the examples have large total light transmittance values and small haze values, and thus have high transparency. Furthermore, from the results of fluorescence analysis, it can be understood that the resin films of the examples can convert wavelengths. That is, according to the resin composition of the present embodiment, a resin composition capable of obtaining a wavelength conversion film with improved transparency can be provided.

Claims

1. A resin composition comprising a norbornene-based resin (A) and a wavelength-converting substance (B). The norbornene-based resin (A) contains a structural unit represented by the following formula (1). 【Chemical 1】 (In the above formula (1), R １ , R ２ , R ３ , and R ４ are each independently selected from the group consisting of a hydrogen atom and an organic group containing a polar group, R １ 、R ２ 、R ３ 、and at least one selected from the group consisting of R ４ is an organic group containing the polar group)

2. In the formula (1), the organic group containing the polar group contains at least one selected from the group consisting of a group containing an ester group, a group containing a formyl group, a group containing a carbonyl group, a group containing a carboxy group, and a group containing a hydroxy group. The resin composition according to Claim 1.

3. The resin composition according to Claim 1 or 2, wherein the structural unit represented by the formula (1) contains a structural unit represented by the following formula (1-a). 【Chemical Formula 2】 (In the formula (1-a), R １１ represents an alkyl group having 1 to 10 carbon atoms)

4. When the total of all structural units in the norbornene-based resin (A) is 100 mol%, the content of the structural unit represented by the formula (1) in the norbornene-based resin (A) is 50 mol% or more and 100 mol% or less. The resin composition according to Claim 1 or 2.

5. The resin composition according to Claim 1 or 2, wherein the weight average molecular weight (Mw) of the norbornene-based resin (A) is 20,000 or more and 1,000,000 or less.

6. The resin composition according to Claim 1 or 2, wherein the molecular weight distribution (Mw / Mn) of the norbornene-based resin (A) is 1.10 or more and 5.00 or less.

7. The resin composition according to Claim 1 or 2, wherein the wavelength-converting substance (B) contains at least one selected from the group consisting of a pyran compound and a rare earth complex.

8. When the total of the non-volatile components in the resin composition is 100% by mass, the content of the wavelength-converting substance (B) in the resin composition is 0.1% by mass or more and 15% by mass or less. The resin composition according to Claim 1 or 2.

9. The resin composition according to Claim 1 or 2, which is a resin composition capable of being used for a wavelength-converting film.

10. The resin composition according to Claim 9, wherein the wavelength-converting film is a film capable of being used for a solar cell.

11. A resin film comprising the resin composition according to Claim 1 or 2.

12. The resin film according to Claim 11, having a thickness of 5 μm or more and 100 μm or less.

13. The resin film according to Claim 11, having a total light transmittance of 85.00% or more measured in accordance with JIS K7361-1:1997.

14. The resin film according to Claim 11, having a haze value of 3.00% or less measured in accordance with JIS K7136:2000.

15. A wavelength conversion film comprising the resin film according to claim 11.

16. A solar cell comprising the wavelength conversion film according to claim 15.

Images