JP2018091924A - Photosensitive composition, cured film, light emitting layer for light emitting display element, light emitting display element, and method of forming light emitting layer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a photosensitive resin composition that can form a cured film showing high internal quantum efficiency without impairing the original properties of quantum dots; a cured film obtained by curing the photosensitive composition; a light emitting layer for a light emitting display element; a light emitting display element having the light emitting layer; and a method of forming a light emitting layer using the photosensitive composition.SOLUTION: A photosensitive composition contains an alkali-soluble resin (A), a photopolymerizable compound (B), a photopolymerization initiator (C), and a quantum dot (D). The photopolymerization initiator (C) used herein is controlled to have a specific polarization level as a molecule.SELECTED DRAWING: Figure 1

Description

  The present invention includes a photosensitive composition containing quantum dots, a cured film obtained by curing the photosensitive composition, a light emitting layer for a light emitting display element, a light emitting display element including the light emitting layer, The present invention relates to a method for forming a light emitting layer using a photosensitive composition.

  Conventionally, extremely small particles (dots) formed to confine electrons are referred to as quantum dots, and application studies have been made in various fields. Here, the size of one quantum dot is several nanometers to several tens of nanometers in diameter, and is composed of about 10,000 atoms.

  Such a quantum dot can change the color (emission wavelength) of emitted fluorescence (wavelength conversion) by changing its size (changing the band gap). For this reason, in recent years, studies on applying quantum dots to display elements as wavelength conversion materials have been earnestly performed (see Patent Documents 1 and 2).

JP 2006-216560 A JP 2008-112154 A

  In general, members included in various display elements are often formed by photolithography using a photosensitive composition because they are extremely fine and require precise position control. For this reason, it is desired that a film having a wavelength conversion function including quantum dots is also formed by photolithography using the photosensitive composition.

For example, as a photosensitive composition used for forming a black matrix constituting a color filter or a colored film such as RGB in a display element, an alkali-soluble resin, a photopolymerizable compound, a photopolymerization initiator, and coloring A photosensitive composition containing an agent is generally used.
It is conceivable that a photosensitive composition capable of forming a cured film containing quantum dots can be obtained by replacing the colorant contained in the photosensitive composition with quantum dots.

  However, as a result of investigation by the present inventors, when a photosensitive composition containing an alkali-soluble resin, a photopolymerizable compound, a photopolymerization initiator, and quantum dots is used, it is expected from the type and amount of quantum dots used. It has become clear that it is often impossible to form a cured film exhibiting internal quantum efficiency.

  The present invention relates to a photosensitive resin composition capable of forming a cured film exhibiting high internal quantum efficiency without impairing the inherent properties of quantum dots, a cured film obtained by curing the photosensitive composition, and a light-emitting display element An object of the present invention is to provide a light emitting layer for use, a light emitting display device including the light emitting layer, and a method for forming a light emitting layer using the above-described photosensitive composition.

  In the photosensitive composition containing an alkali-soluble resin (A), a photopolymerizable compound (B), a photopolymerization initiator (C), and a quantum dot (D), the inventors specified as molecules. The present inventors have found that the above problems can be solved by using the photopolymerization initiator (C) controlled to the degree of polarization of the present invention, and have completed the present invention.

1st aspect of this invention contains alkali-soluble resin (A), a photopolymerizable compound (B), a photoinitiator (C), and a quantum dot (D),
In the photopolymerization initiator (C), the maximum value of the positive partial charge in the molecule calculated according to the extended Hückel method is 0.500 or less, and the minimum value of the negative partial charge is −0.500 or more. A photosensitive composition comprising a compound.

  The second aspect of the present invention is a cured film formed by curing the photosensitive composition according to the first aspect.

  The 3rd aspect of this invention is a light emitting layer for the light emitting display elements formed by hardening | curing the photosensitive composition concerning a 1st aspect.

  A 4th aspect of this invention is a light emission display element provided with the light emitting layer concerning a 3rd aspect.

The fifth aspect of the present invention includes a step of applying a photosensitive composition according to the first aspect on a substrate to form a coating film;
And a step of exposing the coating film.

  According to the present invention, a photosensitive resin composition capable of forming a cured film exhibiting high internal quantum efficiency without impairing the inherent properties of quantum dots, a cured film formed by curing the photosensitive composition, and light emission The light emitting layer for display elements, the light emitting display element provided with the said light emitting layer, and the formation method of the light emitting layer using the above-mentioned photosensitive composition can be provided.

It is a figure which shows typically the structure of the cross section of a typical light emitting display element.

≪Photosensitive composition≫
The photosensitive composition contains an alkali-soluble resin (A), a photopolymerizable compound (B), a photopolymerization initiator (C), and quantum dots (D).
Here, in the photopolymerization initiator (C), the maximum value of the positive partial charge in the molecule, which is calculated according to the extended Hückel method, is 0.500 or less, and the minimum value of the negative partial charge is −0.500. The compound which is the above is included.
When the photosensitive composition contains the photopolymerization initiator (C) that satisfies the above-described conditions regarding partial charges, a cured film exhibiting high internal quantum efficiency can be formed without impairing the inherent properties of the quantum dots.
Hereinafter, essential or optional components of the photosensitive composition and a method for preparing the photosensitive composition will be described.

<Alkali-soluble resin (A)>
The photosensitive composition contains an alkali-soluble resin (A).
Here, in this specification, (A) alkali-soluble resin refers to resin provided with the functional group (for example, a phenolic hydroxyl group, a carboxy group, a sulfonic acid group etc.) which gives alkali solubility in a molecule | numerator.
The kind of alkali-soluble resin (A) is not specifically limited, The various alkali-soluble resin conventionally mix | blended with the photosensitive composition can be used.
Hereinafter, as a suitable specific example of the alkali-soluble resin (A), a resin (A1) having a cardo structure, an acrylic resin (A2), and a novolac resin (A3) will be described.

[Resin having a cardo structure (A1)]
The photosensitive composition may contain a resin (A1) having a cardo structure (hereinafter also referred to as “cardo resin (A1)”) as the alkali-soluble resin (A).

As the cardo resin (A1), a resin having a cardo skeleton in its structure and having a desired alkali solubility can be used. The cardo skeleton refers to a skeleton in which a second ring structure and a third ring structure are bonded to one ring carbon atom constituting the first ring structure. The second annular structure and the third annular structure may be the same structure or different structures.
A typical example of a cardo skeleton is a skeleton in which two aromatic rings (for example, a benzene ring) are bonded to the 9-position carbon atom of a fluorene ring.

（式（ａ−１）中、Ｘ^ａは、下記式（ａ−２）で表される基を示す。ｍ１は０〜２０の整数を示す。） The cardo resin (A1) is not particularly limited, and a conventionally known resin can be used. Among these, the resin represented by the following formula (a-1) is preferable.

(Wherein (in ^{a-1), X} a is, .M1 showing a group represented by the following formula (a-2) is an integer of 0 to 20.)

（式（ａ−２）中、Ｒ^ａ１は、それぞれ独立に水素原子、炭素原子数１〜６の炭化水素基、又はハロゲン原子を示し、Ｒ^ａ２は、それぞれ独立に水素原子又はメチル基を示し、Ｒ^ａ３は、それぞれ独立に直鎖又は分岐鎖のアルキレン基を示し、ｍ２は、０又は１を示しＷ^ａは、下記式（ａ−３）で表される基を示す。）

(In formula (a-2), R ^a1 independently represents a hydrogen atom, a hydrocarbon group having 1 to 6 carbon atoms, or a halogen atom, and R ^a2 independently represents a hydrogen atom or a methyl group. And R ^a3 each independently represents a linear or branched alkylene group, m2 represents 0 or 1, and W ^a represents a group represented by the following formula (a-3).

（式（ａ−３）中の環Ａは、芳香族環と縮合していてもよく置換基を有していてもよい脂肪族環を示す。脂肪族環は、脂肪族炭化水素環であっても、脂肪族複素環であってもよい。）

(Ring A in Formula (a-3) represents an aliphatic ring that may be condensed with an aromatic ring and may have a substituent. The aliphatic ring is an aliphatic hydrocarbon ring. Or an aliphatic heterocyclic ring.)

In formula (a-2), R ^a3 is preferably an alkylene group having 1 to 20 carbon atoms, more preferably an alkylene group having 1 to 10 carbon atoms, and particularly preferably an alkylene group having 1 to 6 carbon atoms. Most preferred are ethane-1,2-diyl, propane-1,2-diyl, and propane 1,3-diyl.

Regarding ring A in formula (a-3), examples of the aliphatic ring include monocycloalkane, bicycloalkane, tricycloalkane, and tetracycloalkane.
Specific examples include monocycloalkanes such as cyclopentane, cyclohexane, cycloheptane and cyclooctane, adamantane, norbornane, isobornane, tricyclodecane, and tetracyclododecane.
The aromatic ring that may be condensed with the aliphatic ring may be an aromatic hydrocarbon ring or an aromatic heterocyclic ring, and is preferably an aromatic hydrocarbon ring. Specifically, a benzene ring and a naphthalene ring are preferable.

Preferable examples of the divalent group represented by the formula (a-3) include the following groups.

Divalent X ^a in the formula (a-1), by reacting a tetracarboxylic acid dianhydride which gives a residue Z ^a, a diol compound represented by the following formula (a-2a), ( A1) Introduced into cardo resin.

In formula (a-2a), R ^a1 , R ^a2 , R ^a3 , and m2 are as described for formula (a-2). Ring A in formula (a-2a) is as described for formula (a-3).

The diol compound represented by the formula (a-2a) can be produced, for example, by the following method.
First, after substituting the hydrogen atom in the phenolic hydroxyl group of the diol compound represented by the following formula (a-2b) with a group represented by —R ^a3 —OH, if necessary, according to a conventional method, Glycidylation using epichlorohydrin or the like is performed to obtain an epoxy compound represented by the following formula (a-2c).
Next, the diol compound represented by the formula (a-2a) is obtained by reacting the epoxy compound represented by the formula (a-2c) with acrylic acid or methacrylic acid.
In formula (a-2b) and formula (a-2c), R ^a1 , R ^a3 , and m2 are as described for formula (a-2). Ring A in formula (a-2b) and formula (a-2c) is as described for formula (a-3).
In addition, the manufacturing method of the diol compound represented by a formula (a-2a) is not limited to said method.

Preferable examples of the diol compound represented by the formula (a-2b) include the following diol compounds.

In the above formula (a-1), R ^a0 is a hydrogen atom or a group represented by —CO—Y ^a —COOH. Here, Y ^a represents a residue obtained by removing an acid anhydride group (—CO—O—CO—) from a dicarboxylic acid anhydride. Examples of dicarboxylic acid anhydrides include maleic anhydride, succinic anhydride, itaconic anhydride, phthalic anhydride, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, methylendomethylenetetrahydrophthalic anhydride, chlorendic anhydride, methyltetrahydro Examples thereof include phthalic anhydride and glutaric anhydride.

Further, in the above formula ^(a-1), Z a represents a residue obtained by removing two acid anhydride groups from a tetracarboxylic acid dianhydride. Examples of tetracarboxylic dianhydrides include tetracarboxylic dianhydrides represented by the following formula (a-4), pyromellitic dianhydrides, benzophenone tetracarboxylic dianhydrides, and biphenyltetracarboxylic dianhydrides. Products, biphenyl ether tetracarboxylic dianhydride and the like.
Moreover, in said formula (a-1), m shows the integer of 0-20.

（式（ａ−４）中、Ｒ^ａ４、Ｒ^ａ５、及びＲ^ａ６は、それぞれ独立に、水素原子、炭素原子数１〜１０のアルキル基及びフッ素原子からなる群より選択される１種を示し、ｍ３は、０〜１２の整数を示す。）

(In formula (a-4), R ^a4 , R ^a5 , and R ^a6 each independently represent one selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, and a fluorine atom. M3 represents an integer of 0 to 12.)

The alkyl group that can be selected as R ^{a4 in} formula (a-4) is an alkyl group having 1 to 10 carbon atoms. By setting the number of carbon atoms included in the alkyl group within this range, the heat resistance of the resulting carboxylic acid ester can be further improved. When R ^a4 is an alkyl group, the number of carbon atoms is preferably 1 to 6, more preferably 1 to 5, still more preferably 1 to 4, more preferably 1 to 3, from the viewpoint of easily obtaining a cardo resin having excellent heat resistance. Is particularly preferred.
When R ^a4 is an alkyl group, the alkyl group may be linear or branched.

As R ^{a4 in} formula (a-4), a hydrogen atom or an alkyl group having 1 to 10 carbon atoms is more preferable independently from the viewpoint of easily obtaining a cardo resin having excellent heat resistance. R ^{a4 in} formula (a-4) is more preferably a hydrogen atom, a methyl group, an ethyl group, an n-propyl group or an isopropyl group, and particularly preferably a hydrogen atom or a methyl group.
A plurality of R ^a4 in the formula (a-4) are preferably the same group because preparation of a highly pure tetracarboxylic dianhydride is easy.

M3 in Formula (a-4) represents an integer of 0 to 12. By making the value of m3 12 or less, purification of tetracarboxylic dianhydride can be facilitated.
In view of easy purification of tetracarboxylic dianhydride, the upper limit of m3 is preferably 5, and more preferably 3.
From the viewpoint of the chemical stability of tetracarboxylic dianhydride, the lower limit of m3 is preferably 1, and more preferably 2.
M3 in formula (a-4) is particularly preferably 2 or 3.

The alkyl group having 1 to 10 carbon atoms that can be selected as R ^a5 and R ^{a6 in} formula (a-4) is the same as the alkyl group having 1 to 10 carbon atoms that can be selected as R ^a4 .
R ^a5 and R ^a6 are each a hydrogen atom or a carbon atom number of 1 to 10 (preferably 1 to 6, more preferably 1 to 5, more preferably 1 to 5) from the viewpoint of easy purification of tetracarboxylic dianhydride. The alkyl group is preferably 1 to 4, particularly preferably 1 to 3), and particularly preferably a hydrogen atom or a methyl group.

  Examples of the tetracarboxylic dianhydride represented by the formula (a-4) include norbornane-2-spiro-α-cyclopentanone-α′-spiro-2 ″ -norbornane-5,5 ″, 6,6 ″ -tetracarboxylic dianhydride (also known as “norbornane-2-spiro-2′-cyclopentanone-5′-spiro-2 ″ -norbornane-5,5 ″, 6,6 ″ -Tetracarboxylic dianhydride "), methylnorbornane-2-spiro-α-cyclopentanone-α'-spiro-2 ''-(methylnorbornane) -5,5 '', 6,6 ''-tetra Carboxylic dianhydride, norbornane-2-spiro-α-cyclohexanone-α′-spiro-2 ″ -norbornane-5,5 ″, 6,6 ″ -tetracarboxylic dianhydride (also known as “norbornane- 2-spiro-2'-siku Hexanone-6′-spiro-2 ″ -norbornane-5,5 ″, 6,6 ″ -tetracarboxylic dianhydride ”), methylnorbornane-2-spiro-α-cyclohexanone-α′-spiro- 2 ″-(methylnorbornane) -5,5 ″, 6,6 ″ -tetracarboxylic dianhydride, norbornane-2-spiro-α-cyclopropanone-α′-spiro-2 ″ -norbornane -5,5 '', 6,6 ''-tetracarboxylic dianhydride, norbornane-2-spiro-α-cyclobutanone-α′-spiro-2 ″ -norbornane-5,5 ″, 6,6 '' -Tetracarboxylic dianhydride, norbornane-2-spiro-α-cycloheptanone-α'-spiro-2 ''-norbornane-5,5 '', 6,6 ''-tetracarboxylic dianhydride Product, norbornane-2- Pyro-α-cyclooctanone-α′-spiro-2 ″ -norbornane-5,5 ″, 6,6 ″ -tetracarboxylic dianhydride, norbornane-2-spiro-α-cyclononanone-α ′ Spiro-2 ″ -norbornane-5,5 ″, 6,6 ″ -tetracarboxylic dianhydride, norbornane-2-spiro-α-cyclodecanone-α′-spiro-2 ″ -norbornane-5 , 5 ″, 6,6 ″ -tetracarboxylic dianhydride, norbornane-2-spiro-α-cycloundecanone-α′-spiro-2 ″ -norbornane-5,5 ″, 6,6 '' -Tetracarboxylic dianhydride, norbornane-2-spiro-α-cyclododecanone-α'-spiro-2 ''-norbornane-5,5 '', 6,6 ''-tetracarboxylic dianhydride Thing, norbornane-2-spiro -Α-cyclotridecanone-α'-spiro-2 ''-norbornane-5,5 '', 6,6 ''-tetracarboxylic dianhydride, norbornane-2-spiro-α-cyclotetradecanone- α′-spiro-2 ″ -norbornane-5,5 ″, 6,6 ″ -tetracarboxylic dianhydride, norbornane-2-spiro-α-cyclopentadecanone-α′-spiro-2 ′ '-Norbornane-5,5' ', 6,6' '-tetracarboxylic dianhydride, norbornane-2-spiro-α- (methylcyclopentanone) -α'-spiro-2' '-norbornane-5 , 5 ″, 6,6 ″ -tetracarboxylic dianhydride, norbornane-2-spiro-α- (methylcyclohexanone) -α′-spiro-2 ″ -norbornane-5,5 ″, 6 6 ''-tetracarboxylic dianhydride Etc. The.

  The weight average molecular weight of the cardo resin (A1) is preferably 1000 to 40000, and more preferably 2000 to 30000. By setting it as the above range, sufficient heat resistance and film strength can be obtained while obtaining good developability.

[Acrylic resin (A2)]
As the alkali-soluble resin (A), an acrylic resin (A2) can also be preferably used. When the acrylic resin (A2) is used, various characteristics of the photosensitive composition can be easily adjusted by appropriately adjusting the type of monomer, the ratio of structural units, and the like.

As the acrylic resin (A2), a resin containing a structural unit derived from (meth) acrylic acid and / or a structural unit derived from another monomer such as (meth) acrylic acid ester can be used. (Meth) acrylic acid is acrylic acid or methacrylic acid. The (meth) acrylic acid ester is represented by the following formula (a-5), and is not particularly limited as long as the object of the present invention is not impaired.

In the above formula (a-5), R ^a7 is a hydrogen atom or a methyl group, and R ^a8 is a monovalent organic group. This organic group may contain a bond or substituent other than a hydrocarbon group such as a hetero atom in the organic group. The organic group may be linear, branched or cyclic.

The substituent other than a hydrocarbon group in the organic group R ^a8, the effect is not particularly limited as long as they do not impair the present invention, a halogen atom, a hydroxyl group, a mercapto group, a sulfide group, a cyano group, an isocyano group, a cyanato group , Isocyanato group, thiocyanato group, isothiocyanato group, silyl group, silanol group, alkoxy group, alkoxycarbonyl group, carbamoyl group, thiocarbamoyl group, nitro group, nitroso group, carboxy group, carboxylate group, acyl group, acyloxy group, sulfino group, a sulfo group, a sulfonato group, a phosphino group, a phosphinyl group, a phosphono group, a phosphonate group, hydroxyimino group, alkyl ether group, an alkyl thioether group, an aryl ether group, aryl thioether group, an amino group (-NH _2, -NHR, -NRR ': R and R 'Each independently represents a hydrocarbon group). The hydrogen atom contained in the substituent may be substituted with a hydrocarbon group. Further, the hydrocarbon group contained in the substituent may be linear, branched, or cyclic.

R ^a8 is preferably an alkyl group, an aryl group, an aralkyl group, or a heterocyclic group, and these groups may be substituted with a halogen atom, a hydroxyl group, an alkyl group, or a heterocyclic group. When these groups contain an alkylene moiety, the alkylene moiety may be interrupted by an ether bond, a thioether bond, or an ester bond.

  When the alkyl group is linear or branched, the number of carbon atoms is preferably 1-20, more preferably 1-15, and particularly preferably 1-10. Examples of suitable alkyl groups include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, n-pentyl, isopentyl, sec -Pentyl group, tert-pentyl group, n-hexyl group, n-heptyl group, n-octyl group, isooctyl group, sec-octyl group, tert-octyl group, n-nonyl group, isononyl group, n-decyl group, An isodecyl group etc. are mentioned.

  When the alkyl group is an alicyclic group or a group containing an alicyclic group, suitable alicyclic groups contained in the alkyl group include a monocyclic alicyclic group such as a cyclopentyl group and a cyclohexyl group, And an adamantyl group, a norbornyl group, an isobornyl group, a tricyclononyl group, a tricyclodecyl group, and a tetracyclododecyl group.

The compound represented by the formula (a-5) is also preferably an epoxy group-containing unsaturated compound having an epoxy group in R ^a8 .
Preferable examples of the epoxy group-containing unsaturated compound represented by the formula (a-5) include glycidyl (meth) acrylate, 2-methylglycidyl (meth) acrylate, 3,4-epoxybutyl (meth) acrylate, 6 , 7-Epoxyheptyl (meth) acrylate and other (meth) acrylic acid epoxy alkyl esters; α-ethyl acrylate glycidyl, α-n-propyl acrylate glycidyl, α-n-butyl acrylate glycidyl, α-ethyl acrylate Α-alkyl acrylic acid epoxy alkyl esters such as acid 6,7-epoxyheptyl; and the like. Among these, glycidyl (meth) acrylate, 2-methylglycidyl (meth) acrylate, and 6,7-epoxyheptyl (meth) acrylate are preferable from the viewpoint of copolymerization reactivity and the strength of the cured resin. These epoxy group-containing unsaturated compounds can be used alone or in combination of two or more.

  The acrylic resin (A2) may be a polymer obtained by polymerizing a monomer other than (meth) acrylic acid ester. Examples of such monomers include (meth) acrylamides, unsaturated carboxylic acids, allyl compounds, vinyl ethers, vinyl esters, styrenes, and the like. These monomers can be used alone or in combination of two or more.

  (Meth) acrylamides include (meth) acrylamide, N-alkyl (meth) acrylamide, N-aryl (meth) acrylamide, N, N-dialkyl (meth) acrylamide, N, N-aryl (meth) acrylamide, N -Methyl-N-phenyl (meth) acrylamide, N-hydroxyethyl-N-methyl (meth) acrylamide and the like.

  Examples of the unsaturated carboxylic acids include monocarboxylic acids such as crotonic acid; dicarboxylic acids such as maleic acid, fumaric acid, citraconic acid, mesaconic acid and itaconic acid; and anhydrides of these dicarboxylic acids.

  Examples of the allyl compound include allyl acetate, allyl caproate, allyl caprylate, allyl laurate, allyl palmitate, allyl stearate, allyl benzoate, allyl acetoacetate, allyl lactate, etc .; allyloxyethanol; Can be mentioned.

  Examples of vinyl ethers include hexyl vinyl ether, octyl vinyl ether, decyl vinyl ether, ethyl hexyl vinyl ether, methoxyethyl vinyl ether, ethoxyethyl vinyl ether, chloroethyl vinyl ether, 1-methyl-2,2-dimethylpropyl vinyl ether, 2-ethylbutyl vinyl ether, hydroxyethyl vinyl ether. Alkyl vinyl ethers such as diethylene glycol vinyl ether, dimethylaminoethyl vinyl ether, diethylaminoethyl vinyl ether, butylaminoethyl vinyl ether, benzyl vinyl ether, tetrahydrofurfuryl vinyl ether; vinyl phenyl ether, vinyl tolyl ether, vinyl chlorophenyl ether, vinyl-2,4-dichloropheny And the like; ethers, vinyl naphthyl ether, vinyl aryl ethers such as vinyl anthranyl ether.

  Vinyl esters include vinyl butyrate, vinyl isobutyrate, vinyl trimethyl acetate, vinyl diethyl acetate, vinyl valerate, vinyl caproate, vinyl chloroacetate, vinyl dichloroacetate, vinyl methoxyacetate, vinyl butoxyacetate, vinylphenyl Examples include acetate, vinyl acetoacetate, vinyl lactate, vinyl-β-phenylbutyrate, vinyl benzoate, vinyl salicylate, vinyl chlorobenzoate, vinyl tetracrotobenzoate, vinyl naphthoate, and the like.

  Styrenes include: styrene; methyl styrene, dimethyl styrene, trimethyl styrene, ethyl styrene, diethyl styrene, isopropyl styrene, butyl styrene, hexyl styrene, cyclohexyl styrene, decyl styrene, benzyl styrene, chloromethyl styrene, trifluoromethyl styrene, ethoxy Alkyl styrene such as methyl styrene and acetoxymethyl styrene; alkoxy styrene such as methoxy styrene, 4-methoxy-3-methyl styrene and dimethoxy styrene; chlorostyrene, dichlorostyrene, trichlorostyrene, tetrachlorostyrene, pentachlorostyrene, bromostyrene, Dibromostyrene, iodostyrene, fluorostyrene, trifluorostyrene, 2-bromo-4-trifluoromethyl Styrene, halostyrenes such as 4-fluoro-3-trifluoromethyl styrene; and the like.

  The amount of the structural unit derived from (meth) acrylic acid and the amount of the structural unit derived from another monomer in the (A3) acrylic resin are not particularly limited as long as the object of the present invention is not impaired. (A3) The amount of the structural unit derived from (meth) acrylic acid in the acrylic resin is preferably 5 to 50% by mass, more preferably 10 to 30% by mass with respect to the mass of the acrylic resin.

  The weight average molecular weight of the acrylic resin (A2) is preferably 2000 to 50000, and more preferably 5000 to 30000. By setting it as the above range, there is a tendency that the film forming ability of the photosensitive composition and the developability after exposure are easily balanced.

[Novolac resin (A3)]
The alkali-soluble resin (A) may contain a novolac resin (A3). When alkali-soluble resin (A) contains novolak resin (A3), it is easy to form a cured film with good heat resistance that is not easily deformed by heating.

  As the novolak resin (A3), various novolak resins conventionally blended in the photosensitive composition can be used. The novolak resin (A3) is preferably one obtained by addition condensation of an aromatic compound having a phenolic hydroxyl group (hereinafter simply referred to as “phenols”) and an aldehyde in the presence of an acid catalyst.

(Phenols)
(A1) Examples of phenols used in preparing the novolak resin include phenol; cresols such as o-cresol, m-cresol, and p-cresol; 2,3-xylenol, 2,4-xylenol, 2 Xylenols such as 2,5-xylenol, 2,6-xylenol, 3,4-xylenol, 3,5-xylenol; ethylphenols such as o-ethylphenol, m-ethylphenol, p-ethylphenol; 2-isopropyl Alkylphenols such as phenol, 3-isopropylphenol, 4-isopropylphenol, o-butylphenol, m-butylphenol, p-butylphenol, and p-tert-butylphenol; 2,3,5-trimethylphenol, and 3,4,5 -Trimethylphe Trialkylphenols such as alcohol; polyphenols such as resorcinol, catechol, hydroquinone, hydroquinone monomethyl ether, pyrogallol, and phlorogricinol; alkyl polyphenols such as alkylresorcin, alkylcatechol, and alkylhydroquinone (any The alkyl group also has 1 to 4 carbon atoms.); Α-naphthol; β-naphthol; hydroxydiphenyl; and bisphenol A and the like. These phenols may be used alone or in combination of two or more.

Among these phenols, m-cresol and p-cresol are preferable, and it is more preferable to use m-cresol and p-cresol in combination. In this case, various characteristics such as heat resistance of the cured film formed using the photosensitive composition can be adjusted by adjusting the blending ratio of the two.
The blending ratio of m-cresol and p-cresol is not particularly limited, but the molar ratio of m-cresol / p-cresol is preferably 3/7 or more and 8/2 or less. By using m-cresol and p-cresol in such a ratio, it is easy to obtain a photosensitive composition capable of forming a cured film having excellent heat resistance.

Moreover, the novolak resin manufactured combining m-cresol and 2,3,5-trimethylphenol is also preferable. When such a novolak resin is used, it is particularly easy to obtain a photosensitive composition that can form a cured film that hardly flows excessively by heating during post-baking.
The blending ratio of m-cresol and 2,3,5-trimethylphenol is not particularly limited, but the molar ratio of m-cresol / 2,3,5-trimethylphenol is 70/30 or more and 95/5 or less. Is preferred.

(Aldehydes)
Examples of aldehydes used for producing the novolak resin (A3) include formaldehyde, paraformaldehyde, furfural, benzaldehyde, nitrobenzaldehyde, and acetaldehyde. These aldehydes may be used alone or in combination of two or more.

(Acid catalyst)
Examples of the acid catalyst used in preparing the novolak resin (A3) include inorganic acids such as hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, and phosphorous acid; formic acid, oxalic acid, acetic acid, diethylsulfuric acid, and paratoluene And organic acids such as sulfonic acid; and metal salts such as zinc acetate. These acid catalysts may be used alone or in combination of two or more.

(Molecular weight)
The polystyrene-reduced weight average molecular weight (Mw; hereinafter, also simply referred to as “weight average molecular weight”) of the novolak resin (A3) is from the viewpoint of resistance to flow caused by heating of the cured film formed using the photosensitive composition. The lower limit is preferably 2000, more preferably 5000, particularly preferably 10,000, even more preferably 15000, most preferably 20000, the upper limit is preferably 50000, more preferably 45000, still more preferably 40000, and most preferably 35000.

  As the novolac resin (A3), those having different polystyrene-equivalent weight average molecular weights can be used in combination. By using a combination of different weight average molecular weights, it is possible to balance the developability of the photosensitive composition and the heat resistance of a cured film formed using the photosensitive composition.

  The content of the alkali-soluble resin (A) is preferably 10 to 70% by mass and more preferably 15 to 55% by mass with respect to the mass of the entire solid content of the photosensitive composition. By making it into said range, it is easy to obtain the photosensitive composition which is excellent in developability.

<(B) Photopolymerizable compound>
The photosensitive composition contains (B) a photopolymerizable compound. (B) As a photopolymerizable compound, the monomer which has an ethylenically unsaturated group is preferable. Such monomers include monofunctional monomers and polyfunctional monomers.

  Monofunctional monomers include (meth) acrylamide, methylol (meth) acrylamide, methoxymethyl (meth) acrylamide, ethoxymethyl (meth) acrylamide, propoxymethyl (meth) acrylamide, butoxymethoxymethyl (meth) acrylamide, N-methylol ( (Meth) acrylamide, N-hydroxymethyl (meth) acrylamide, (meth) acrylic acid, fumaric acid, maleic acid, maleic anhydride, itaconic acid, itaconic anhydride, citraconic acid, citraconic anhydride, crotonic acid, 2-acrylamide- 2-methylpropane sulfonic acid, tert-butylacrylamide sulfonic acid, methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate Cyclohexyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 2-phenoxy-2-hydroxypropyl (meth) acrylate, 2- (Meth) acryloyloxy-2-hydroxypropyl phthalate, glycerin mono (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, dimethylaminoethyl (meth) acrylate, glycidyl (meth) acrylate, 2,2,2-trifluoroethyl Examples include (meth) acrylate, 2,2,3,3-tetrafluoropropyl (meth) acrylate, and half (meth) acrylate of a phthalic acid derivative. These monofunctional monomers can be used alone or in combination of two or more.

  On the other hand, as the polyfunctional monomer, ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, polypropylene glycol di (meth) acrylate, butylene glycol Di (meth) acrylate, neopentyl glycol di (meth) acrylate, 1,6-hexane glycol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, glycerin di (meth) acrylate, pentaerythritol triacrylate, pentaerythritol Tetraacrylate, dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate, pentaerythritol di (meta Acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, 2,2-bis (4- (meth) acryloxydi Ethoxyphenyl) propane, 2,2-bis (4- (meth) acryloxypolyethoxyphenyl) propane, 2-hydroxy-3- (meth) acryloyloxypropyl (meth) acrylate, ethylene glycol diglycidyl ether di (meth) Acrylate, diethylene glycol diglycidyl ether di (meth) acrylate, diglycidyl phthalate ester di (meth) acrylate, glycerin triacrylate, glycerin polyglycidyl ether poly (Meth) acrylate, urethane (meth) acrylate (that is, a reaction product of tolylene diisocyanate, trimethylhexamethylene diisocyanate or hexamethylene diisocyanate and 2-bidoxyethyl (meth) acrylate), methylenebis (meth) acrylamide, (meth) acrylamide Examples thereof include polyfunctional monomers such as methylene ether, a condensate of polyhydric alcohol and N-methylol (meth) acrylamide, and triacryl formal. These polyfunctional monomers can be used alone or in combination of two or more.

  Among these monomers having an ethylenically unsaturated group, a trifunctional or higher polyfunctional monomer is preferable from the viewpoint of increasing the adhesion of the photosensitive composition to the substrate and the strength of the photosensitive composition after curing. A polyfunctional monomer having 4 or more functional groups is more preferable, and a polyfunctional monomer having 5 or more functional groups is more preferable.

  (B) 1-50 mass% is preferable with respect to the mass of the whole solid content of a photosensitive composition, and, as for content in the photosensitive composition of a photopolymerizable compound, 5-40 mass% is more preferable. By setting it as the above range, it tends to be easy to balance sensitivity, developability, and resolution.

<Photopolymerization initiator (C)>
The photosensitive composition contains a photopolymerization initiator (C). In the photopolymerization initiator (C), the maximum value of the positive partial charge in the molecule calculated according to the extended Hückel method is 0.500 or less, and the minimum value of the negative partial charge is −0.500 or more. Contains compounds.
When the photopolymerization initiator (C) contains a compound that satisfies the above-described conditions regarding the partial charges in the molecule, it is easy to form a cured film having high internal quantum efficiency without impairing the properties of the quantum dots (D) described later. .

The partial charge in the molecule can be calculated using software that can calculate the bias of the charge in the molecule based on the extended Huckel method.
Specifically, by using ChemBio3D Ultra version 12.0 (manufactured by CambridgeSoft), it is possible to calculate the bias of charge in the molecule. It is possible to calculate the bias of the charge of the constituent atoms by drawing “0” and executing “Extend-Huckel” from the calculation program mounted on it.
In this specification, the value obtained by using the above software is defined as the value of electric charge (partial charge).
The charge bias is as described below. For example, when the ground state of a specific atom in a compound is 0, if the charge (partial charge) of the atom is +0.5, the charge of +0.5 electrons in the atom decreases. , Which means that the charge of the atom is biased to the plus side.

When forming a cured film using the photosensitive composition containing a photoinitiator and a quantum dot, the internal quantum efficiency in a cured film may be lower than the originally anticipated internal quantum efficiency.
The cause of this is not clear, but it is presumed that one reason is that the photopolymerization initiator has a large intra-molecular charge bias.
Many of the compounds known as photopolymerization initiators have a large charge bias in the molecule. Thus, it is considered that a compound having a large charge bias in the molecule may interact with the quantum dot material.
Then, it is considered that when a cured film is formed using a photosensitive composition containing a photopolymerization initiator and quantum dots, it is difficult to form a cured film having a desired internal quantum efficiency.

  On the other hand, when the photopolymerization initiator (C) contains a compound in which the maximum value of the positive partial charge in the molecule is not more than a specific value and the minimum value of the negative partial charge is not less than the specified value, It is considered that there is little influence between (C) and the quantum dot (D). As a result, when the photosensitive composition concerning this invention is used, it is estimated that it is easy to form the cured film with favorable internal quantum efficiency which can be utilized suitably as a light emitting layer for light emitting display elements.

The photopolymerization initiator (C) may contain a compound that does not satisfy the above-described predetermined condition for the partial charge in the molecule within a range not impairing the object of the present invention.
In the photopolymerization initiator (C), the content of the compound satisfying the above predetermined condition for the partial charge in the molecule is typically preferably 70% by mass or more, more preferably 80% by mass or more, and 90% by mass. The above is particularly preferable, and 100% by mass is most preferable.

Specific examples of the photopolymerization initiator that satisfies the above predetermined condition for the partial charge in the molecule include 2- (benzoyloxyimino) -1- [4- (phenylthio) phenyl] -1-octanone (for example, OXE-01). (Commercially available as BASF) and oxime ester compounds represented by the following formula (CX).

In addition, the partial charges in the molecule of the above compound group are as follows.

For reference, a specific example that does not satisfy the above-mentioned predetermined conditions for the maximum value of the positive partial charge and the minimum value of the negative partial charge in the well-known photopolymerization initiators that are commercially available. As diphenyl (2,4,6-trimethoxybenzoyl) phosphine oxide (for example, commercially available as Lucirin TPO (manufactured by BASF)), 2-benzyl-2-dimethylamino-1- (4-morpholino) Phenyl) -butanone-1 (for example, commercially available as Irgacure 369 (manufactured by BASF)), 4-methoxystyryl-bis (trichloromethyl) -s-triazine (for example, triazine PMS (manufactured by Nippon Sibel Hegner)) O-acetyl-1- [6- (2-methylbenzoyl) -9-ethyl-9H-carbazole-3 Yl] ethanone oxime (for example, commercially available as OXE-02 (manufactured by BASF)) and an oxime ester compound represented by the following formula (CY) (for example, NCI-831 (manufactured by ADEKA)). ).
As can be seen from the above, just because the compound is a well-known photopolymerization initiator, the maximum value of the positive partial charge and the minimum value of the negative partial charge in the molecule are not necessarily the predetermined conditions described above. It does not satisfy.

In addition, about the partial charge, the partial charge in the molecule | numerator of the commercially available compound group which does not become in a specific numerical range is as showing below.

In view of the sensitivity of the photosensitive composition, the photopolymerization initiator (C) is preferably an oxime ester compound.
Among oxime ester compounds, since the maximum value of the positive partial charge in the molecule tends to be small and the minimum value of the negative partial charge tends to be large, it is expressed as> C = N—O—CO—R ^c0. Compounds having an oxime ester group are preferred. Note that R ^c0 in the above formula is an aliphatic hydrocarbon group having 1 to 6 carbon atoms.
R ^c0 may be a linear alkyl group, a branched alkyl group, or a cycloalkyl group, an aliphatic hydrocarbon ring such as a cyclopropylmethyl group, and a linear carbon group. It may be a group containing a combination with a hydrogen group.
The aliphatic hydrocarbon group as R ^c0 is preferably an alkyl group having 1 to 6 carbon atoms, more preferably a methyl group or an ethyl group, and particularly preferably a methyl group.

The photopolymerization initiator (C) satisfying the above predetermined condition for the partial charges in the molecule has been specifically described above. The oxime ester compound represented by the formula (c1) described later and the formula (c4) described later. The partial charge in the molecule is calculated from the group consisting of the oxime ester compounds represented by the following formula, and a compound selected based on whether or not the above predetermined condition is satisfied is used as the photopolymerization initiator (C). Is also preferable.
The oxime ester compound represented by the formula (c1) and the compound included in the group consisting of the oxime ester compound represented by the formula (c4) to be described later include a positive part in the molecule calculated according to the extended Hückel method. There is a tendency that the maximum value of the charge is small and the minimum value of the negative partial charge is large.
Moreover, the oxime ester compound represented by the formula (c1) and the oxime ester compound represented by the formula (c4) described later are also preferable in that a photosensitive composition having good sensitivity can be easily obtained.

（Ｒ^ｃ１は、１価の有機基、アミノ基、ハロゲン、ニトロ基、及びシアノ基からなる群より選択される基であり、
ｎ１は０〜４の整数であり、
ｎ２は０、又は１であり、
Ｒ^ｃ２は、置換基を有してもよいフェニル基、又は置換基を有してもよいカルバゾリル基であり、
Ｒ^ｃ３は、水素原子、又は炭素原子数１〜６のアルキル基である。）
なお、分子内の正の部分電荷の最大値が小さく、負の部分電荷の最小値が大きい傾向がある点からは、Ｒ^ｃ２は置換基を有してもよいフェニル基であるのが好ましい。 Hereinafter, the oxime ester compound represented by the formula (c1) will be described.

(R ^c1 is a group selected from the group consisting of a monovalent organic group, an amino group, a halogen, a nitro group, and a cyano group;
n1 is an integer of 0 to 4,
n2 is 0 or 1,
R ^c2 is a phenyl group which may have a substituent, or a carbazolyl group which may have a substituent,
R ^c3 is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms. )
R ^c2 is preferably a phenyl group which may have a substituent from the viewpoint that the maximum value of the positive partial charge in the molecule tends to be small and the minimum value of the negative partial charge tends to be large.

In formula (c1), R ^c1 is not particularly limited as long as the object of the present invention is not impaired, and is appropriately selected from various organic groups. Preferred examples when R ^c1 is an organic group include an alkyl group, an alkoxy group, a cycloalkyl group, a cycloalkoxy group, a saturated aliphatic acyl group, a saturated aliphatic acyloxy group, an alkoxycarbonyl group, and a substituent. An optionally substituted phenyl group, an optionally substituted phenoxy group, an optionally substituted benzoyl group, an optionally substituted phenoxycarbonyl group, an optionally substituted benzoyloxy A group, a phenylalkyl group which may have a substituent, a naphthyl group which may have a substituent, a naphthoxy group which may have a substituent, a naphthoyl group which may have a substituent, a substituent A naphthoxycarbonyl group which may have a naphthyloxy group which may have a substituent, a naphthylalkyl group which may have a substituent, a heterocyclyl group which may have a substituent, Examples include an amino group substituted with an mino group, 1 or 2 organic groups, a morpholin-1-yl group, a piperazin-1-yl group, a halogen, a nitro group, and a cyano group. When n1 is an integer of 2 to 4, R ^c1 may be the same or different. Further, the number of carbon atoms of the substituent does not include the number of carbon atoms of the substituent that the substituent further has.

When R ^c1 is an alkyl group, 1 to 20 carbon atoms are preferable, and 1 to 6 carbon atoms are more preferable. Further, when R ^c1 is an alkyl group, it may be linear or branched. Specific examples when R ^c1 is an alkyl group include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, and an n-pentyl group. , Isopentyl group, sec-pentyl group, tert-pentyl group, n-hexyl group, n-heptyl group, n-octyl group, isooctyl group, sec-octyl group, tert-octyl group, n-nonyl group, isononyl group, An n-decyl group, an isodecyl group, etc. are mentioned. When R ^c1 is an alkyl group, the alkyl group may include an ether bond (—O—) in the carbon chain. Examples of the alkyl group having an ether bond in the carbon chain include a methoxyethyl group, an ethoxyethyl group, a methoxyethoxyethyl group, an ethoxyethoxyethyl group, a propyloxyethoxyethyl group, and a methoxypropyl group.

When R ^c1 is an alkoxy group, 1 to 20 carbon atoms are preferable, and 1 to 6 carbon atoms are more preferable. Further, when R ^c1 is an alkoxy group, it may be linear or branched. Specific examples when R ^c1 is an alkoxy group include methoxy group, ethoxy group, n-propyloxy group, isopropyloxy group, n-butyloxy group, isobutyloxy group, sec-butyloxy group, tert-butyloxy group, n -Pentyloxy group, isopentyloxy group, sec-pentyloxy group, tert-pentyloxy group, n-hexyloxy group, n-heptyloxy group, n-octyloxy group, isooctyloxy group, sec-octyloxy group Tert-octyloxy group, n-nonyloxy group, isononyloxy group, n-decyloxy group, and isodecyloxy group. When R ^c1 is an alkoxy group, the alkoxy group may include an ether bond (—O—) in the carbon chain. Examples of the alkoxy group having an ether bond in the carbon chain include a methoxyethoxy group, an ethoxyethoxy group, a methoxyethoxyethoxy group, an ethoxyethoxyethoxy group, a propyloxyethoxyethoxy group, and a methoxypropyloxy group.

When R ^c1 is a cycloalkyl group or a cycloalkoxy group, 3 to 10 carbon atoms are preferable, and 3 to 6 carbon atoms are more preferable. Specific examples in the case where R ^c1 is a cycloalkyl group include a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, and a cyclooctyl group. Specific examples in the case where R ^c1 is a cycloalkoxy group include a cyclopropyloxy group, a cyclobutyloxy group, a cyclopentyloxy group, a cyclohexyloxy group, a cycloheptyloxy group, and a cyclooctyloxy group.

When R ^c1 is a saturated aliphatic acyl group or a saturated aliphatic acyloxy group, 2 to 20 carbon atoms are preferable, and 2 to 7 carbon atoms are more preferable. Specific examples when R ^c1 is a saturated aliphatic acyl group include acetyl group, propanoyl group, n-butanoyl group, 2-methylpropanoyl group, n-pentanoyl group, 2,2-dimethylpropanoyl group, n -Hexanoyl group, n-heptanoyl group, n-octanoyl group, n-nonanoyl group, n-decanoyl group, n-undecanoyl group, n-dodecanoyl group, n-tridecanoyl group, n-tetradecanoyl group, n-pentadecanyl group Examples include a noyl group and an n-hexadecanoyl group. Specific examples when R ^c1 is a saturated aliphatic acyloxy group include acetyloxy group, propanoyloxy group, n-butanoyloxy group, 2-methylpropanoyloxy group, n-pentanoyloxy group, 2, 2-dimethylpropanoyloxy group, n-hexanoyloxy group, n-heptanoyloxy group, n-octanoyloxy group, n-nonanoyloxy group, n-decanoyloxy group, n-undecanoyloxy group, n -Dodecanoyloxy group, n-tridecanoyloxy group, n-tetradecanoyloxy group, n-pentadecanoyloxy group, n-hexadecanoyloxy group and the like.

When R ^c1 is an alkoxycarbonyl group, 2 to 20 carbon atoms are preferable, and 2 to 7 carbon atoms are more preferable. Specific examples when R ^c1 is an alkoxycarbonyl group include methoxycarbonyl group, ethoxycarbonyl group, n-propyloxycarbonyl group, isopropyloxycarbonyl group, n-butyloxycarbonyl group, isobutyloxycarbonyl group, sec-butyl. Oxycarbonyl group, tert-butyloxycarbonyl group, n-pentyloxycarbonyl group, isopentyloxycarbonyl group, sec-pentyloxycarbonyl group, tert-pentyloxycarbonyl group, n-hexyloxycarbonyl group, n-heptyloxycarbonyl Group, n-octyloxycarbonyl group, isooctyloxycarbonyl group, sec-octyloxycarbonyl group, tert-octyloxycarbonyl group, n-nonyloxycarbonyl group, Examples include an isononyloxycarbonyl group, an n-decyloxycarbonyl group, and an isodecyloxycarbonyl group.

When R ^c1 is a phenylalkyl group, 7 to 20 carbon atoms are preferable, and 7 to 10 carbon atoms are more preferable. Further, when R ^c1 is a naphthylalkyl group, the number of carbon atoms is preferably 11 to 20, and more preferably 11 to 14 carbon atoms. Specific examples when R ^c1 is a phenylalkyl group include a benzyl group, a 2-phenylethyl group, a 3-phenylpropyl group, and a 4-phenylbutyl group. Specific examples of when R ^c1 is a naphthylalkyl group include an α-naphthylmethyl group, a β-naphthylmethyl group, a 2- (α-naphthyl) ethyl group, and a 2- (β-naphthyl) ethyl group. . When R ^c1 is a phenylalkyl group or a naphthylalkyl group, R ^c1 may further have a substituent on the phenyl group or naphthyl group.

When R ^c1 is a heterocyclyl group, the heterocyclyl group is a 5-membered or 6-membered monocycle containing 1 or more of N, S, and O, or such monocycles or such monocycles and a benzene ring are condensed. Heterocyclyl group. When the heterocyclyl group is a condensed ring, the ring number is up to 3. Examples of the heterocyclic ring constituting the heterocyclyl group include furan, thiophene, pyrrole, oxazole, isoxazole, thiazole, thiadiazole, isothiazole, imidazole, pyrazole, triazole, pyridine, pyrazine, pyrimidine, pyridazine, benzofuran, benzothiophene, indole, Examples include isoindole, indolizine, benzimidazole, benzotriazole, benzoxazole, benzothiazole, carbazole, purine, quinoline, isoquinoline, quinazoline, phthalazine, cinnoline, and quinoxaline. When R ^c1 is a heterocyclyl group, the heterocyclyl group may further have a substituent.

When R ^c1 is an amino group substituted with an organic group of 1 or 2, suitable examples of the organic group include alkyl groups having 1 to 20 carbon atoms, cycloalkyl groups having 3 to 10 carbon atoms, carbon A saturated aliphatic acyl group having 2 to 20 atoms, a phenyl group which may have a substituent, a benzoyl group which may have a substituent, a phenyl having 7 to 20 carbon atoms which may have a substituent Examples thereof include an alkyl group, an optionally substituted naphthyl group, an optionally substituted naphthoyl group, an optionally substituted naphthylalkyl group having 11 to 20 carbon atoms, and a heterocyclyl group. It is done. Specific examples of these suitable organic groups are the same as those for R ^c1 . Specific examples of the amino group substituted with 1 or 2 organic groups include methylamino group, ethylamino group, diethylamino group, n-propylamino group, di-n-propylamino group, isopropylamino group, n- Butylamino group, di-n-butylamino group, n-pentylamino group, n-hexylamino group, n-heptylamino group, n-octylamino group, n-nonylamino group, n-decylamino group, phenylamino group, Naphthylamino group, acetylamino group, propanoylamino group, n-butanoylamino group, n-pentanoylamino group, n-hexanoylamino group, n-heptanoylamino group, n-octanoylamino group, n- Examples include a decanoylamino group, a benzoylamino group, an α-naphthoylamino group, and a β-naphthoylamino group.

In the case where the phenyl group, naphthyl group, and heterocyclyl group contained in R ^c1 further have a substituent, the substituent is as follows: an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, a carbon atom A monoalkylamino group having a saturated aliphatic acyl group having 2 to 7 carbon atoms, an alkoxycarbonyl group having 2 to 7 carbon atoms, a saturated aliphatic acyloxy group having 2 to 7 carbon atoms, and an alkyl group having 1 to 6 carbon atoms And a dialkylamino group having an alkyl group having 1 to 6 carbon atoms, a morpholin-1-yl group, a piperazin-1-yl group, a halogen, a nitro group, and a cyano group. When the phenyl group, naphthyl group, and heterocyclyl group included in R ^c1 further have a substituent, the number of the substituent is not limited as long as the object of the present invention is not impaired, but 1 to 4 is preferable. When the phenyl group, naphthyl group, and heterocyclyl group included in R ^c1 have a plurality of substituents, the plurality of substituents may be the same or different.

Among R ^c1 , since it is chemically stable, has few steric hindrances, and is easy to synthesize an oxime ester compound, an alkyl group having 1 to 6 carbon atoms, 1 to 1 carbon atoms, and the like. A group selected from the group consisting of 6 alkoxy groups and saturated aliphatic acyl groups having 2 to 7 carbon atoms is preferred, alkyls having 1 to 6 carbon atoms are more preferred, and methyl groups are particularly preferred.

Position R ^c1 is bonded to the phenyl group, the phenyl group R ^c1 are attached the position of the bond to the main chain of the phenyl group and the oxime ester compound as a 1-position, if the 2-position of the position of the methyl group 4th or 5th is preferable, and 5th is more preferable. N1 is preferably an integer of 0 to 3, more preferably an integer of 0 to 2, and particularly preferably 0 or 1.

R ^c2 is a phenyl group which may have a substituent, or a carbazolyl group which may have a substituent. When R ^c2 is a carbazolyl group that may have a substituent, the nitrogen atom on the carbazolyl group may be substituted with an alkyl group having 1 to 6 carbon atoms.
In R ^c2 , the substituent that the phenyl group or carbazolyl group has is not particularly limited as long as the object of the present invention is not impaired. Examples of suitable substituents that the phenyl group or carbazolyl group may have on the carbon atom include an alkyl group having 1 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, and 3 carbon atoms. -10 cycloalkyl group, C3-C10 cycloalkoxy group, C2-C20 saturated aliphatic acyl group, C2-C20 alkoxycarbonyl group, C2-C20 saturated Aliphatic acyloxy group, optionally substituted phenyl group, optionally substituted phenoxy group, optionally substituted phenylthio group, optionally substituted benzoyl group, substituted A phenoxycarbonyl group which may have a group, a benzoyloxy group which may have a substituent, a phenylalkyl group having 7 to 20 carbon atoms which may have a substituent, and a substituent. Naphthyl A naphthoxy group which may have a substituent, a naphthoyl group which may have a substituent, a naphthoxycarbonyl group which may have a substituent, a naphthoyloxy group which may have a substituent, a substituent A naphthylalkyl group having 11 to 20 carbon atoms which may have a group, a heterocyclyl group which may have a substituent, a heterocyclylcarbonyl group which may have a substituent, an amino group, 1 or 2 organic groups Examples include an amino group substituted with a group, a morpholin-1-yl group, a piperazin-1-yl group, a halogen, a nitro group, and a cyano group.

When R ^c2 is a carbazolyl group, examples of suitable substituents that the carbazolyl group may have on the nitrogen atom include alkyl groups having 1 to 20 carbon atoms and cycloalkyl groups having 3 to 10 carbon atoms. A saturated aliphatic acyl group having 2 to 20 carbon atoms, an alkoxycarbonyl group having 2 to 20 carbon atoms, a phenyl group which may have a substituent, a benzoyl group which may have a substituent, and a substituent. A phenoxycarbonyl group which may have, a phenylalkyl group having 7 to 20 carbon atoms which may have a substituent, a naphthyl group which may have a substituent, a naphthoyl group which may have a substituent, A naphthoxycarbonyl group which may have a substituent, a naphthylalkyl group having 11 to 20 carbon atoms which may have a substituent, a heterocyclyl group which may have a substituent, and a substituent; Heterogeneity And a krylcarbonyl group. Among these substituents, an alkyl group having 1 to 20 carbon atoms is preferable, an alkyl group having 1 to 6 carbon atoms is more preferable, and an ethyl group is particularly preferable.

Specific examples of the substituent that the phenyl group or carbazolyl group may have include an alkyl group, an alkoxy group, a cycloalkyl group, a cycloalkoxy group, a saturated aliphatic acyl group, an alkoxycarbonyl group, a saturated aliphatic acyloxy group, and a substituent. With respect to an optionally substituted phenylalkyl group, an optionally substituted naphthylalkyl group, an optionally substituted heterocyclyl group, and an amino group substituted with one or two organic groups , R ^c1 .

Examples of the substituent in the case where the phenyl group, the naphthyl group, and the heterocyclyl group included in the substituent that the phenyl group or the carbazolyl group has in R ^c2 further have a substituent include an alkyl group having 1 to 6 carbon atoms An alkoxy group having 1 to 6 carbon atoms; a saturated aliphatic acyl group having 2 to 7 carbon atoms; an alkoxycarbonyl group having 2 to 7 carbon atoms; a saturated aliphatic acyloxy group having 2 to 7 carbon atoms; a phenyl group; Benzoyl group; benzoyl group; benzoyl substituted by a group selected from the group consisting of alkyl groups having 1 to 6 carbon atoms, morpholin-1-yl group, piperazin-1-yl group, and phenyl group; A monoalkylamino group having an alkyl group having 1 to 6 carbon atoms; a dialkylamino group having an alkyl group having 1 to 6 carbon atoms; Examples include a holin-1-yl group; a piperazin-1-yl group; a halogen; a nitro group; and a cyano group. When the phenyl group, the naphthyl group, and the heterocyclyl group included in the substituent of the phenyl group or carbazolyl group further have a substituent, the number of the substituent is not limited as long as the object of the present invention is not impaired. 1-4 are preferable. When the phenyl group, naphthyl group, and heterocyclyl group have a plurality of substituents, the plurality of substituents may be the same or different.

Among R ^c2 , a group represented by the following formula (c2) or (c3) is preferable, and a group represented by the following formula (c2) is more preferable from the viewpoint of easily obtaining a photopolymerization initiator having excellent sensitivity. A group represented by the following formula (c2) in which A is S is particularly preferable.

（Ｒ^ｃ４は、１価の有機基、アミノ基、ハロゲン、ニトロ基、及びシアノ基からなる群より選択される基であり、ＡはＳ又はＯであり、ｎ３は、０〜４の整数である。）

（Ｒ^ｃ５及びＲ^ｃ６は、それぞれ、１価の有機基である。）

(R ^c4 is a group selected from the group consisting of a monovalent organic group, amino group, halogen, nitro group, and cyano group, A is S or O, and n3 is an integer of 0 to 4. is there.)

(R ^c5 and R ^c6 are each a monovalent organic group.)

When R ^c4 in formula (c2) is an organic group, it can be selected from various organic groups as long as the object of the present invention is not impaired. In the formula (c2), when R ^c4 is an organic group, preferred examples include an alkyl group having 1 to 6 carbon atoms; an alkoxy group having 1 to 6 carbon atoms; and a saturated aliphatic group having 2 to 7 carbon atoms. Acyl group; alkoxycarbonyl group having 2 to 7 carbon atoms; saturated aliphatic acyloxy group having 2 to 7 carbon atoms; phenyl group; naphthyl group; benzoyl group; naphthoyl group; alkyl group having 1 to 6 carbon atoms; A benzoyl group substituted by a group selected from the group consisting of a -1-yl group, a piperazin-1-yl group, and a phenyl group; a monoalkylamino group having an alkyl group having 1 to 6 carbon atoms; A dialkylamino group having 1 to 6 alkyl groups; a morpholin-1-yl group; a piperazin-1-yl group; a halogen; a nitro group; and a cyano group.

In ^Rc4 , substituted with a group selected from the group consisting of a benzoyl group; a naphthoyl group; an alkyl group having 1 to 6 carbon atoms, a morpholin-1-yl group, a piperazin-1-yl group, and a phenyl group Benzoyl group; nitro group is preferred, benzoyl group; naphthoyl group; 2-methylphenylcarbonyl group; 4- (piperazin-1-yl) phenylcarbonyl group; 4- (phenyl) phenylcarbonyl group is more preferred.

In formula (c2), n3 is preferably an integer of 0 to 3, more preferably an integer of 0 to 2, and particularly preferably 0 or 1. If n3 is 1, binding position of R ^c4, to the bond to the phenyl group R ^c4 is bonded is bonded to an oxygen atom or a sulfur atom, it is preferably in the para position.

R ^c5 in formula (c3) can be selected from various organic groups as long as the object of the present invention is not ^impaired . Preferable examples of R ^c5 include an alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 10 carbon atoms, a saturated aliphatic acyl group having 2 to 20 carbon atoms, and 2 to 20 carbon atoms. Alkoxycarbonyl group, phenyl group which may have a substituent, benzoyl group which may have a substituent, phenoxycarbonyl group which may have a substituent, carbon atoms which may have a substituent 7 ~ 20 phenylalkyl group, optionally substituted naphthyl group, optionally substituted naphthoyl group, optionally substituted naphthoxycarbonyl group, optionally substituted Examples thereof include a naphthylalkyl group having 11 to 20 carbon atoms, a heterocyclyl group which may have a substituent, and a heterocyclylcarbonyl group which may have a substituent.
Among R ^c5 , an alkyl group having 1 to 20 carbon atoms is preferable, an alkyl group having 1 to 6 carbon atoms is more preferable, and an ethyl group is particularly preferable.
R ^c6 in formula (c3) is not particularly limited as long as the object of the present invention is not impaired, and can be selected from various organic groups. Specific examples of the group suitable as R ^c6 include an alkyl group having 1 to 20 carbon atoms, a phenyl group which may have a substituent, a naphthyl group which may have a substituent, and a substituent. The heterocyclyl group which may be sufficient is mentioned. Among these groups, R ^c6 is more preferably a phenyl group which may have a substituent, and particularly preferably a 2-methylphenyl group.

^Examples of the substituent when the phenyl group, naphthyl group, and heterocyclyl group contained in R ^c4 , R ^c5 , or R ^c6 further have a substituent include an alkyl group having 1 to 6 carbon atoms, and 1 to 1 carbon atom. 6 alkoxy groups, saturated aliphatic acyl groups having 2 to 7 carbon atoms, alkoxycarbonyl groups having 2 to 7 carbon atoms, saturated aliphatic acyloxy groups having 2 to 7 carbon atoms, alkyl having 1 to 6 carbon atoms And a monoalkylamino group having a group, a dialkylamino group having an alkyl group having 1 to 6 carbon atoms, a morpholin-1-yl group, a piperazin-1-yl group, a halogen, a nitro group, and a cyano group. When the phenyl group, naphthyl group, and heterocyclyl group contained in R ^c4 , R ^c5 , or R ^c6 further have a substituent, the number of the substituent is not limited as long as the object of the present invention is not impaired, 1-4 are preferable. When the phenyl group, naphthyl group, and heterocyclyl group contained in R ^c4 , R ^c5 , or R ^c6 have a plurality of substituents, the plurality of substituents may be the same or different.

R ^c3 in formula (c1) is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms. R ^c3 is preferably a methyl group or an ethyl group, and more preferably a methyl group.

Among the group of oxime ester compounds represented by the formula (c1), for example, a compound represented by the following formula (CZ1) is preferable. In the compound represented by the formula (CZ1), the maximum value of the positive partial charges in the molecule is 0.019, and the minimum value of the negative partial charges is −0.004.

（Ｒ^ｃ７は水素原子、ニトロ基又は１価の有機基であり、Ｒ^ｃ８及びＲ^ｃ９は、それぞれ、置換基を有してもよい鎖状アルキル基、置換基を有してもよい環状有機基、又は水素原子であり、Ｒ^ｃ８とＲ^ｃ９とは相互に結合して環を形成してもよく、Ｒ^ｃ１０は１価の有機基であり、Ｒ^ｃ１１は、水素原子、置換基を有してもよい炭素原子数１〜１１のアルキル基、又は置換基を有してもよいアリール基であり、ｎ４は０〜４の整数であり、ｎ５は０又は１である。） Next, the oxime ester compound represented by the following formula (c4) will be described.

(R ^c7 is a hydrogen atom, a nitro group or a monovalent organic group, and R ^c8 and R ^c9 are each a chain alkyl group which may have a substituent, or a cyclic organic which may have a substituent. R ^c8 and R ^c9 may be bonded to each other to form a ring, R ^c10 is a monovalent organic group, and R ^c11 has a hydrogen atom or a substituent. An alkyl group having 1 to 11 carbon atoms, or an aryl group which may have a substituent, n4 is an integer of 0 to 4, and n5 is 0 or 1.)

  Here, as the oxime compound for producing the oxime ester compound of the formula (c4), a compound represented by the following formula (c5) is suitable.

（Ｒ^ｃ７、Ｒ^ｃ８、Ｒ^ｃ９、Ｒ^ｃ１０、ｎ４、及びｎ５は、式（ｃ４）と同様である。）

(R ^c7 , R ^c8 , R ^c9 , R ^c10 , n4, and n5 are the same as in formula (c4).)

In formulas (c4) and (c5), R ^c7 is a hydrogen atom, a nitro group, or a monovalent organic group. R ^c7 is bonded to a 6-membered aromatic ring different from the 6-membered aromatic ring bonded to the group represented by — (CO) _n5 — on the fluorene ring in the formula (c4). In formula (c4), the bonding position of R ^{c7 to} the fluorene ring is not particularly limited. When the compound represented by the formula (c4) has one or more R ^c7 , one of the one or more R ^c7 is a fluorene ring because synthesis of the compound represented by the formula (c4) is easy. Bonding at the 2-position is preferable. If R ^c7 is more, a plurality of R ^c7 is independently in may be the same or different.

When R ^c7 is an organic group, R ^c7 is not particularly limited as long as the object of the present invention is not ^{impaired, and} is appropriately selected from various organic groups. Preferred examples when R ^c7 is an organic group include an alkyl group, an alkoxy group, a cycloalkyl group, a cycloalkoxy group, a saturated aliphatic acyl group, a saturated aliphatic acyloxy group, an alkoxycarbonyl group, and a substituent. An optionally substituted phenyl group, an optionally substituted phenoxy group, an optionally substituted benzoyl group, an optionally substituted phenoxycarbonyl group, an optionally substituted benzoyloxy A group, a phenylalkyl group which may have a substituent, a naphthyl group which may have a substituent, a naphthoxy group which may have a substituent, a naphthoyl group which may have a substituent, a substituent An optionally substituted naphthoxycarbonyl group, an optionally substituted naphthoyloxy group, an optionally substituted naphthylalkyl group, an optionally substituted heterocyclyl group, Examples include a heterocyclylcarbonyl group which may have a substituent, an amino group substituted with 1 or 2 organic groups, a morpholin-1-yl group, and a piperazin-1-yl group.

When R ^c7 is an alkyl group, the number of carbon atoms of the alkyl group is preferably 1-20, and more preferably 1-6. Further, when R ^c7 is an alkyl group, it may be linear or branched. Specific examples when R ^c7 is an alkyl group include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, and an n-pentyl group. , Isopentyl group, sec-pentyl group, tert-pentyl group, n-hexyl group, n-heptyl group, n-octyl group, isooctyl group, sec-octyl group, tert-octyl group, n-nonyl group, isononyl group, An n-decyl group, an isodecyl group, etc. are mentioned. When R ^c7 is an alkyl group, the alkyl group may include an ether bond (—O—) in the carbon chain. Examples of the alkyl group having an ether bond in the carbon chain include a methoxyethyl group, an ethoxyethyl group, a methoxyethoxyethyl group, an ethoxyethoxyethyl group, a propyloxyethoxyethyl group, and a methoxypropyl group.

When R ^c7 is an alkoxy group, the alkoxy group preferably has 1 to 20 carbon atoms, and more preferably 1 to 6 carbon atoms. Further, when R ^c7 is an alkoxy group, it may be linear or branched. Specific examples when R ^c7 is an alkoxy group include methoxy group, ethoxy group, n-propyloxy group, isopropyloxy group, n-butyloxy group, isobutyloxy group, sec-butyloxy group, tert-butyloxy group, n -Pentyloxy group, isopentyloxy group, sec-pentyloxy group, tert-pentyloxy group, n-hexyloxy group, n-heptyloxy group, n-octyloxy group, isooctyloxy group, sec-octyloxy group Tert-octyloxy group, n-nonyloxy group, isononyloxy group, n-decyloxy group, and isodecyloxy group. When R ^c7 is an alkoxy group, the alkoxy group may include an ether bond (—O—) in the carbon chain. Examples of the alkoxy group having an ether bond in the carbon chain include a methoxyethoxy group, an ethoxyethoxy group, a methoxyethoxyethoxy group, an ethoxyethoxyethoxy group, a propyloxyethoxyethoxy group, and a methoxypropyloxy group.

When R ^c7 is a cycloalkyl group or a cycloalkoxy group, the number of carbon atoms of the cycloalkyl group or the cycloalkoxy group is preferably 3 to 10, and more preferably 3 to 6. Specific examples when R ^c7 is a cycloalkyl group include a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, and a cyclooctyl group. Specific examples when R ^c7 is a cycloalkoxy group include a cyclopropyloxy group, a cyclobutyloxy group, a cyclopentyloxy group, a cyclohexyloxy group, a cycloheptyloxy group, and a cyclooctyloxy group.

When R ^c7 is a saturated aliphatic acyl group or a saturated aliphatic acyloxy group, the number of carbon atoms of the saturated aliphatic acyl group or the saturated aliphatic acyloxy group is preferably 2 to 21, and more preferably 2 to 7. Specific examples when R ^c7 is a saturated aliphatic acyl group include acetyl group, propanoyl group, n-butanoyl group, 2-methylpropanoyl group, n-pentanoyl group, 2,2-dimethylpropanoyl group, n -Hexanoyl group, n-heptanoyl group, n-octanoyl group, n-nonanoyl group, n-decanoyl group, n-undecanoyl group, n-dodecanoyl group, n-tridecanoyl group, n-tetradecanoyl group, n-pentadecane Examples include a noyl group and an n-hexadecanoyl group. Specific examples when R ^c7 is a saturated aliphatic acyloxy group include acetyloxy group, propanoyloxy group, n-butanoyloxy group, 2-methylpropanoyloxy group, n-pentanoyloxy group, 2, 2-dimethylpropanoyloxy group, n-hexanoyloxy group, n-heptanoyloxy group, n-octanoyloxy group, n-nonanoyloxy group, n-decanoyloxy group, n-undecanoyloxy group, n -Dodecanoyloxy group, n-tridecanoyloxy group, n-tetradecanoyloxy group, n-pentadecanoyloxy group, n-hexadecanoyloxy group and the like.

When R ^c7 is an alkoxycarbonyl group, the number of carbon atoms of the alkoxycarbonyl group is preferably 2-20, and more preferably 2-7. Specific examples when R ^c7 is an alkoxycarbonyl group include methoxycarbonyl group, ethoxycarbonyl group, n-propyloxycarbonyl group, isopropyloxycarbonyl group, n-butyloxycarbonyl group, isobutyloxycarbonyl group, sec-butyl. Oxycarbonyl group, tert-butyloxycarbonyl group, n-pentyloxycarbonyl group, isopentyloxycarbonyl group, sec-pentyloxycarbonyl group, tert-pentyloxycarbonyl group, n-hexyloxycarbonyl group, n-heptyloxycarbonyl Group, n-octyloxycarbonyl group, isooctyloxycarbonyl group, sec-octyloxycarbonyl group, tert-octyloxycarbonyl group, n-nonyloxycarbonyl group, Examples include an isononyloxycarbonyl group, an n-decyloxycarbonyl group, and an isodecyloxycarbonyl group.

When R ^c7 is a phenylalkyl group, the number of carbon atoms of the phenylalkyl group is preferably 7 to 20, and more preferably 7 to 10. Further, when R ^c7 is a naphthylalkyl group, the number of carbon atoms of the naphthylalkyl group is preferably 11-20, and more preferably 11-14. Specific examples when R ^c7 is a phenylalkyl group include a benzyl group, a 2-phenylethyl group, a 3-phenylpropyl group, and a 4-phenylbutyl group. Specific examples in the case where R ^c7 is a naphthylalkyl group include an α-naphthylmethyl group, a β-naphthylmethyl group, a 2- (α-naphthyl) ethyl group, and a 2- (β-naphthyl) ethyl group. . When R ^c7 is a phenylalkyl group or a naphthylalkyl group, R ^c7 may further have a substituent on the phenyl group or naphthyl group.

When R ^c7 is a heterocyclyl group, the heterocyclyl group is a 5-membered or 6-membered monocycle containing 1 or more of N, S, and O, or such monocycles or such monocycles and a benzene ring are condensed. Heterocyclyl group. When the heterocyclyl group is a condensed ring, the ring number is up to 3. The heterocyclyl group may be an aromatic group (heteroaryl group) or a non-aromatic group. Examples of the heterocyclic ring constituting the heterocyclyl group include furan, thiophene, pyrrole, oxazole, isoxazole, thiazole, thiadiazole, isothiazole, imidazole, pyrazole, triazole, pyridine, pyrazine, pyrimidine, pyridazine, benzofuran, benzothiophene, indole, Examples include isoindole, indolizine, benzimidazole, benzotriazole, benzoxazole, benzothiazole, carbazole, purine, quinoline, isoquinoline, quinazoline, phthalazine, cinnoline, quinoxaline, piperidine, piperazine, morpholine, piperidine, tetrahydropyran, and tetrahydrofuran. It is done. When R ^c7 is a heterocyclyl group, the heterocyclyl group may further have a substituent.

When R ^c7 is a heterocyclylcarbonyl group, the heterocyclyl group contained in the heterocyclylcarbonyl group is the same as when R ^c7 is a heterocyclyl group.

When R ^c7 is an amino group substituted with 1 or 2 organic groups, suitable examples of the organic group include alkyl groups having 1 to 20 carbon atoms, cycloalkyl groups having 3 to 10 carbon atoms, and carbon atoms. A saturated aliphatic acyl group having 2 to 21 carbon atoms, a phenyl group which may have a substituent, a benzoyl group which may have a substituent, a phenylalkyl having 7 to 20 carbon atoms which may have a substituent A naphthyl group which may have a substituent, a naphthyl group which may have a substituent, a naphthylalkyl group having 11 to 20 carbon atoms which may have a substituent, a heterocyclyl group, and the like. . Specific examples of these suitable organic groups are the same as those for R ^c7 . Specific examples of the amino group substituted with 1 or 2 organic groups include methylamino group, ethylamino group, diethylamino group, n-propylamino group, di-n-propylamino group, isopropylamino group, n- Butylamino group, di-n-butylamino group, n-pentylamino group, n-hexylamino group, n-heptylamino group, n-octylamino group, n-nonylamino group, n-decylamino group, phenylamino group, Naphthylamino group, acetylamino group, propanoylamino group, n-butanoylamino group, n-pentanoylamino group, n-hexanoylamino group, n-heptanoylamino group, n-octanoylamino group, n- Examples include a decanoylamino group, a benzoylamino group, an α-naphthoylamino group, and a β-naphthoylamino group.

In the case where the phenyl group, the naphthyl group, and the heterocyclyl group included in R ^c7 further have a substituent, the substituent includes an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, and a carbon atom. A monoalkylamino group having a saturated aliphatic acyl group having 2 to 7 carbon atoms, an alkoxycarbonyl group having 2 to 7 carbon atoms, a saturated aliphatic acyloxy group having 2 to 7 carbon atoms, and an alkyl group having 1 to 6 carbon atoms And a dialkylamino group having an alkyl group having 1 to 6 carbon atoms, a morpholin-1-yl group, a piperazin-1-yl group, a halogen, a nitro group, and a cyano group. When the phenyl group, naphthyl group, and heterocyclyl group contained in R ^c7 further have a substituent, the number of the substituent is not limited as long as the object of the present invention is not impaired, but 1 to 4 is preferable. When the phenyl group, naphthyl group, and heterocyclyl group included in R ^c7 have a plurality of substituents, the plurality of substituents may be the same or different.

Among the groups described above, R ^c7 is preferably a nitro group or a group represented by R ^c12 —CO— because the sensitivity tends to be improved. R ^c12 is not particularly limited as long as the object of the present invention is not ^impaired , and can be selected from various organic groups. Examples of groups suitable as R ^c12 include an alkyl group having 1 to 20 carbon atoms, a phenyl group which may have a substituent, a naphthyl group which may have a substituent, and a substituent. Or a heterocyclyl group that may be used. As R ^c12 , among these groups, a 2-methylphenyl group, a thiophen-2-yl group, and an α-naphthyl group are particularly preferable.
Moreover, it is preferable that R ^c7 is a hydrogen atom because transparency tends to be good. When R ^c7 is a hydrogen atom and R ^c10 is a group represented by the following formula (c4a) or (c4b), the transparency tends to be better.

In formula (c4), R ^c8 and R ^c9 each represent a chain alkyl group that may have a substituent, a cyclic organic group that may have a substituent, or a hydrogen atom. R ^c8 and R ^c9 may be bonded to each other to form a ring. Among these groups, as R ^c8 and R ^c9 , a chain alkyl group which may have a substituent is preferable. When R ^c8 and R ^c9 are chain alkyl groups which may have a substituent, the chain alkyl group may be a straight chain alkyl group or a branched chain alkyl group.

When R ^c8 and R ^c9 are chain alkyl groups having no substituent, the number of carbon atoms of the chain alkyl group is preferably 1-20, more preferably 1-10, and particularly preferably 1-6. Specific examples when R ^c8 and R ^c9 are chain alkyl groups include methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, sec-butyl group, and tert-butyl group. N-pentyl group, isopentyl group, sec-pentyl group, tert-pentyl group, n-hexyl group, n-heptyl group, n-octyl group, isooctyl group, sec-octyl group, tert-octyl group, n-nonyl Group, isononyl group, n-decyl group, isodecyl group and the like. When R ^c8 and R ^c9 are alkyl groups, the alkyl group may contain an ether bond (—O—) in the carbon chain. Examples of the alkyl group having an ether bond in the carbon chain include a methoxyethyl group, an ethoxyethyl group, a methoxyethoxyethyl group, an ethoxyethoxyethyl group, a propyloxyethoxyethyl group, and a methoxypropyl group.

When R ^c8 and R ^c9 are chain alkyl groups having a substituent, the number of carbon atoms of the chain alkyl group is preferably 1-20, more preferably 1-10, and particularly preferably 1-6. In this case, the number of carbon atoms of the substituent is not included in the number of carbon atoms of the chain alkyl group. The chain alkyl group having a substituent is preferably linear.
The substituent that the alkyl group may have is not particularly limited as long as the object of the present invention is not impaired. Preferable examples of the substituent include a cyano group, a halogen atom, a cyclic organic group, and an alkoxycarbonyl group. Examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom. In these, a fluorine atom, a chlorine atom, and a bromine atom are preferable. Examples of the cyclic organic group include a cycloalkyl group, an aromatic hydrocarbon group, and a heterocyclyl group. Specific examples of the cycloalkyl group are the same as the preferred examples in the case where R ^c7 is a cycloalkyl group. Specific examples of the aromatic hydrocarbon group include a phenyl group, a naphthyl group, a biphenylyl group, an anthryl group, and a phenanthryl group. Specific examples of the heterocyclyl group are the same as the preferred examples when R ^c7 is a heterocyclyl group. When R ^c7 is an alkoxycarbonyl group, the alkoxy group contained in the alkoxycarbonyl group may be linear or branched, and is preferably linear. 1-10 are preferable and, as for the carbon atom number of the alkoxy group contained in an alkoxycarbonyl group, 1-6 are more preferable.

  When the chain alkyl group has a substituent, the number of substituents is not particularly limited. The number of preferred substituents varies depending on the number of carbon atoms in the chain alkyl group. The number of substituents is typically 1-20, preferably 1-10, and more preferably 1-6.

When R ^c8 and R ^c9 are cyclic organic groups, the cyclic organic group may be an alicyclic group or an aromatic group. Examples of the cyclic organic group include an aliphatic cyclic hydrocarbon group, an aromatic hydrocarbon group, and a heterocyclyl group. When R ^c8 and R ^c9 are cyclic organic groups, the substituent that the cyclic organic group may have is the same as when R ^c8 and R ^c9 are chain alkyl groups.

When R ^c8 and R ^c9 are aromatic hydrocarbon groups, is the aromatic hydrocarbon group a phenyl group or a group formed by bonding a plurality of benzene rings via a carbon-carbon bond? A group formed by condensation of a plurality of benzene rings is preferred. When the aromatic hydrocarbon group is a phenyl group or a group formed by combining or condensing a plurality of benzene rings, the number of benzene rings contained in the aromatic hydrocarbon group is not particularly limited, 3 or less is preferable, 2 or less is more preferable, and 1 is particularly preferable. Preferable specific examples of the aromatic hydrocarbon group include a phenyl group, a naphthyl group, a biphenylyl group, an anthryl group, and a phenanthryl group.

When R ^c8 and R ^c9 are aliphatic cyclic hydrocarbon groups, the aliphatic cyclic hydrocarbon group may be monocyclic or polycyclic. Although the carbon atom number of an aliphatic cyclic hydrocarbon group is not specifically limited, 3-20 are preferable and 3-10 are more preferable. Examples of monocyclic cyclic hydrocarbon groups are cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, norbornyl, isobornyl, tricyclononyl, tricyclodecyl, Examples include a tetracyclododecyl group and an adamantyl group.

When R ^c8 and R ^c9 are a heterocyclyl group, the heterocyclyl group is a 5-membered or 6-membered monocycle containing one or more N, S, O, such monocycles, or such monocycles and a benzene ring. And a condensed heterocyclyl group. When the heterocyclyl group is a condensed ring, the ring number is up to 3. The heterocyclyl group may be an aromatic group (heteroaryl group) or a non-aromatic group. Examples of the heterocyclic ring constituting the heterocyclyl group include furan, thiophene, pyrrole, oxazole, isoxazole, thiazole, thiadiazole, isothiazole, imidazole, pyrazole, triazole, pyridine, pyrazine, pyrimidine, pyridazine, benzofuran, benzothiophene, indole, Examples include isoindole, indolizine, benzimidazole, benzotriazole, benzoxazole, benzothiazole, carbazole, purine, quinoline, isoquinoline, quinazoline, phthalazine, cinnoline, quinoxaline, piperidine, piperazine, morpholine, piperidine, tetrahydropyran, and tetrahydrofuran. It is done.

R ^c8 and R ^c9 may be bonded to each other to form a ring. The group formed by the ring formed by R ^c8 and R ^c9 is preferably a cycloalkylidene group. When R ^c8 and R ^c9 are bonded to form a cycloalkylidene group, the ring constituting the cycloalkylidene group is preferably a 5-membered to 6-membered ring, and more preferably a 5-membered ring.

When the group formed by combining R ^c8 and R ^c9 is a cycloalkylidene group, the cycloalkylidene group may be condensed with one or more other rings. Examples of the ring that may be condensed with the cycloalkylidene group include benzene ring, naphthalene ring, cyclobutane ring, cyclopentane ring, cyclohexane ring, cycloheptane ring, cyclooctane ring, furan ring, thiophene ring, pyrrole ring, pyridine A ring, a pyrazine ring, and a pyrimidine ring.

Examples of suitable groups among R ^c8 and R ^c9 described above include groups represented by the formula -A ¹ -A ² . In the formula, A ¹ is a linear alkylene group, and A ² is an alkoxy group, a cyano group, a halogen atom, a halogenated alkyl group, a cyclic organic group, or an alkoxycarbonyl group.

The number of carbon atoms in a straight chain alkylene group A ¹ is 1 to 10 preferably 1 to 6 is more preferable. When A ² is an alkoxy group, the alkoxy group may be linear or branched, and is preferably linear. 1-10 are preferable and, as for the carbon atom number of an alkoxy group, 1-6 are more preferable. When A ² is a halogen atom, a fluorine atom, a chlorine atom, a bromine atom and an iodine atom are preferable, and a fluorine atom, a chlorine atom and a bromine atom are more preferable. When A ² is a halogenated alkyl group, the halogen atom contained in the halogenated alkyl group is preferably a fluorine atom, a chlorine atom, a bromine atom, or an iodine atom, and more preferably a fluorine atom, a chlorine atom, or a bromine atom. The halogenated alkyl group may be linear or branched, and is preferably linear. When A ² is a cyclic organic group, examples of the cyclic organic group are the same as the cyclic organic group that R ^c8 and R ^c9 have as a substituent. When A ² is an alkoxycarbonyl group, examples of the alkoxycarbonyl group are the same as the alkoxycarbonyl group that R ^c8 and R ^c9 have as a substituent.

Preferable specific examples of R ^c8 and R ^c9 include alkyl groups such as ethyl group, n-propyl group, n-butyl group, n-hexyl group, n-heptyl group, and n-octyl group; 2-methoxyethyl Group, 3-methoxy-n-propyl group, 4-methoxy-n-butyl group, 5-methoxy-n-pentyl group, 6-methoxy-n-hexyl group, 7-methoxy-n-heptyl group, 8-methoxy -N-octyl group, 2-ethoxyethyl group, 3-ethoxy-n-propyl group, 4-ethoxy-n-butyl group, 5-ethoxy-n-pentyl group, 6-ethoxy-n-hexyl group, 7- Alkoxyalkyl groups such as ethoxy-n-heptyl group and 8-ethoxy-n-octyl group; 2-cyanoethyl group, 3-cyano-n-propyl group, 4-cyano-n-butyl group, 5-cyano-n − Cyanoalkyl groups such as an nyl group, 6-cyano-n-hexyl group, 7-cyano-n-heptyl group, and 8-cyano-n-octyl group; 2-phenylethyl group, 3-phenyl-n-propyl group Phenylalkyl such as 4-phenyl-n-butyl group, 5-phenyl-n-pentyl group, 6-phenyl-n-hexyl group, 7-phenyl-n-heptyl group, and 8-phenyl-n-octyl group Groups: 2-cyclohexylethyl group, 3-cyclohexyl-n-propyl group, 4-cyclohexyl-n-butyl group, 5-cyclohexyl-n-pentyl group, 6-cyclohexyl-n-hexyl group, 7-cyclohexyl-n- Heptyl, 8-cyclohexyl-n-octyl, 2-cyclopentylethyl, 3-cyclopentyl-n-propyl, 4-cyclopent Cycloalkylalkyl groups such as ru-n-butyl, 5-cyclopentyl-n-pentyl, 6-cyclopentyl-n-hexyl, 7-cyclopentyl-n-heptyl, and 8-cyclopentyl-n-octyl; 2-methoxycarbonylethyl group, 3-methoxycarbonyl-n-propyl group, 4-methoxycarbonyl-n-butyl group, 5-methoxycarbonyl-n-pentyl group, 6-methoxycarbonyl-n-hexyl group, 7-methoxy Carbonyl-n-heptyl group, 8-methoxycarbonyl-n-octyl group, 2-ethoxycarbonylethyl group, 3-ethoxycarbonyl-n-propyl group, 4-ethoxycarbonyl-n-butyl group, 5-ethoxycarbonyl-n -Pentyl group, 6-ethoxycarbonyl-n-hexyl group, 7-ethoxy Alkoxycarbonylalkyl groups such as rubonyl-n-heptyl and 8-ethoxycarbonyl-n-octyl; 2-chloroethyl, 3-chloro-n-propyl, 4-chloro-n-butyl, 5-chloro -N-pentyl group, 6-chloro-n-hexyl group, 7-chloro-n-heptyl group, 8-chloro-n-octyl group, 2-bromoethyl group, 3-bromo-n-propyl group, 4-bromo -N-butyl group, 5-bromo-n-pentyl group, 6-bromo-n-hexyl group, 7-bromo-n-heptyl group, 8-bromo-n-octyl group, 3,3,3-trifluoro Examples thereof include a propyl group and a halogenated alkyl group such as 3,3,4,4,5,5,5-heptafluoro-n-pentyl group.

Among R ^c8 and R ^c9 , preferred groups among the above are ethyl group, n-propyl group, n-butyl group, n-pentyl group, 2-methoxyethyl group, 2-cyanoethyl group, 2-phenylethyl group, 2-cyclohexylethyl group, 2-methoxycarbonylethyl group, 2-chloroethyl group, 2-bromoethyl group, 3,3,3-trifluoropropyl group, and 3,3,4,4,5,5,5-hepta A fluoro-n-pentyl group;

Examples of suitable organic groups for R ^c10 are the same as for R ^c7 , alkyl groups, alkoxy groups, cycloalkyl groups, cycloalkoxy groups, saturated aliphatic acyl groups, alkoxycarbonyl groups, saturated aliphatic acyloxy groups, substituents. A phenyl group which may have a substituent, a phenoxy group which may have a substituent, a benzoyl group which may have a substituent, a phenoxycarbonyl group which may have a substituent, and a substituent A good benzoyloxy group, a phenylalkyl group which may have a substituent, a naphthyl group which may have a substituent, a naphthoxy group which may have a substituent, a naphthoyl group which may have a substituent, A naphthoxycarbonyl group which may have a substituent, a naphthoyloxy group which may have a substituent, a naphthylalkyl group which may have a substituent, a heterocycle which may have a substituent Group, an optionally substituted heterocyclyl group, 1, or an amino group substituted with two organic groups, morpholin-1-yl group, and piperazine-1-yl group. Specific examples of these groups are the same as those described for R ^c7 . R ^c10 is also preferably a cycloalkylalkyl group, a phenoxyalkyl group which may have a substituent on the aromatic ring, or a phenylthioalkyl group which may have a substituent on the aromatic ring. The substituent that the phenoxyalkyl group and the phenylthioalkyl group may have is the same as the substituent that the phenyl group contained in R ^c7 may have.

Among organic groups, as R ^c10 , an alkyl group, a cycloalkyl group, a phenyl group which may have a substituent, a cycloalkylalkyl group, or a phenylthio which may have a substituent on an aromatic ring. Alkyl groups are preferred. As the alkyl group, an alkyl group having 1 to 20 carbon atoms is preferable, an alkyl group having 1 to 8 carbon atoms is more preferable, an alkyl group having 1 to 4 carbon atoms is particularly preferable, and a methyl group is most preferable. Among the phenyl groups that may have a substituent, a methylphenyl group is preferable, and a 2-methylphenyl group is more preferable. The number of carbon atoms of the cycloalkyl group contained in the cycloalkylalkyl group is preferably 5 to 10, more preferably 5 to 8, and particularly preferably 5 or 6. 1-8 are preferable, as for the carbon atom number of the alkylene group contained in a cycloalkylalkyl group, 1-4 are more preferable, and 2 is especially preferable. Of the cycloalkylalkyl groups, a cyclopentylethyl group is preferred. 1-8 are preferable, as for the carbon atom number of the alkylene group contained in the phenylthioalkyl group which may have a substituent on an aromatic ring, 1-4 are more preferable, and 2 is especially preferable. Among the phenylthioalkyl groups which may have a substituent on the aromatic ring, a 2- (4-chlorophenylthio) ethyl group is preferable.

In addition, as R ^c10 , a group represented by —A ³ —CO—O—A ⁴ is also preferable. A ³ is a divalent organic group, preferably a divalent hydrocarbon group, and preferably an alkylene group. A ⁴ is a monovalent organic group, and is preferably a monovalent hydrocarbon group.

When A ³ is an alkylene group, the alkylene group may be linear or branched, and is preferably linear. If A ³ is an alkylene group, number of carbon atoms in the alkylene group is preferably 1 to 10, more preferably 1 to 6, 1 to 4 are particularly preferred.

Preferable examples of A ⁴ include an alkyl group having 1 to 10 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, and an aromatic hydrocarbon group having 6 to 20 carbon atoms. Preferred examples of A ⁴ include methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, sec-butyl group, tert-butyl group, n-pentyl group, and n-hexyl. Group, phenyl group, naphthyl group, benzyl group, phenethyl group, α-naphthylmethyl group, β-naphthylmethyl group and the like.

Preferred examples of the group represented by —A ³ —CO—O—A ⁴ include 2-methoxycarbonylethyl group, 2-ethoxycarbonylethyl group, 2-n-propyloxycarbonylethyl group, 2-n -Butyloxycarbonylethyl group, 2-n-pentyloxycarbonylethyl group, 2-n-hexyloxycarbonylethyl group, 2-benzyloxycarbonylethyl group, 2-phenoxycarbonylethyl group, 3-methoxycarbonyl-n-propyl Group, 3-ethoxycarbonyl-n-propyl group, 3-n-propyloxycarbonyl-n-propyl group, 3-n-butyloxycarbonyl-n-propyl group, 3-n-pentyloxycarbonyl-n-propyl group , 3-n-hexyloxycarbonyl-n-propyl group, 3-benzyloxycarbonyl -n- propyl group, and 3-phenoxycarbonyl -n- propyl group and the like.

（式（ｃ４ａ）及び（ｃ４ｂ）中、Ｒ^ｃ１３及びＲ^ｃ１４はそれぞれ有機基であり、ｎ６は０〜４の整数であり、Ｒ^ｃ１３及びＲ^８がベンゼン環上の隣接する位置に存在する場合、Ｒ^ｃ１３とＲ^ｃ１４とが互いに結合して環を形成してもよく、ｎ７は１〜８の整数であり、ｎ８は１〜５の整数であり、ｎ９は０〜（ｎ８＋３）の整数であり、Ｒ^ｃ１５は有機基である。） ^Having described ^{R c10,} as the ^{R c10,} preferably a group represented by the following formula (C4a) or (C4b).

(In the formulas (c4a) and (c4b), R ^c13 and R ^c14 are each an organic group, n6 is an integer of 0 to 4, and R ^c13 and R ⁸ are present at adjacent positions on the benzene ring. R ^c13 and R ^c14 may be bonded to each other to form a ring, n7 is an integer of 1 to 8, n8 is an integer of 1 to 5, and n9 is an integer of 0 to (n8 + 3). And R ^c15 is an organic group.)

Examples of the organic group for R ^c13 and R ^{c14 in} formula (c4a) are the same as those for R ^c7 . R ^c13 is preferably an alkyl group or a phenyl group. When R ^c13 is an alkyl group, the number of carbon atoms is preferably 1 to 10, more preferably 1 to 5, particularly preferably 1 to 3, and most preferably 1. That is, R ^c13 is most preferably a methyl group. When R ^c13 and R ^c14 combine to form a ring, the ring may be an aromatic ring or an aliphatic ring. Preferred examples of the group represented by the formula (c4a) in which R ^c13 and R ^c14 form a ring include a naphthalen-1-yl group, 1,2,3,4- And tetrahydronaphthalen-5-yl group. In said formula (c4a), n6 is an integer of 0-4, It is preferable that it is 0 or 1, and it is more preferable that it is 0.

In the above formula (c4b), R ^c15 is an organic group. ^Examples of the organic group include the same groups as those described for R ^c7 . Of the organic groups, an alkyl group is preferred. The alkyl group may be linear or branched. 1-10 are preferable, as for the carbon atom number of an alkyl group, 1-5 are more preferable, and 1-3 are especially preferable. As R ^c15 , a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group and the like are preferably exemplified, and among these, a methyl group is more preferable.

  In said formula (c4b), n8 is an integer of 1-5, the integer of 1-3 is preferable and 1 or 2 is more preferable. In said formula (c4b), n9 is 0- (n8 + 3), the integer of 0-3 is preferable, the integer of 0-2 is more preferable, and 0 is especially preferable. In said formula (c4b), n7 is an integer of 1-8, the integer of 1-5 is preferable, the integer of 1-3 is more preferable, and 1 or 2 is especially preferable.

In formula (c4), R ^c11 represents a hydrogen atom, an alkyl group having 1 to 11 carbon atoms which may have a substituent, or an aryl group which may have a substituent. Preferred examples of the substituent that may be present when R ^c11 is an alkyl group include a phenyl group and a naphthyl group. In addition, preferred examples of the substituent that may be present when R ^c7 is an aryl group include an alkyl group having 1 to 5 carbon atoms, an alkoxy group, and a halogen atom.

In formula (c4), R ^c11 is preferably a hydrogen atom, a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, a phenyl group, a benzyl group, a methylphenyl group, a naphthyl group, or the like. Among these, a methyl group or a phenyl group is more preferable.

The compound represented by the formula (c4) represents an oxime group (> C═N—OH) contained in the compound represented by the above formula (c5) by> C═N—O—COR ^c11. It is produced by a method including a step of converting to an oxime ester group. R ^c11 are the same as ^{R c11} in formula (c4).

The conversion of the oxime group (> C═N—OH) to the oxime ester group represented by> C═N—O—COR ^c11 involves conversion of the compound represented by the above formula (c5), an acylating agent, It is performed by reacting.
The acylating agent to give the acyl group represented by -COR ^{c11, (R c11} _CO) or an acid anhydride represented by ₂ ^O, R c11 COHal (Hal is a halogen atom) include acid halide represented by It is done.

Among the compounds represented by the formula (c4), a compound represented by the following formula (CZ2) is preferable. In the compound represented by the formula (CZ2), the maximum value of the positive partial charges in the molecule is 0.024, and the minimum value of the negative partial charges is −0.129.

For the photopolymerization initiator (C), the maximum value of the positive partial charges in the molecule of the compound is preferably 0.350 or less, more preferably 0.200 or less, and even more preferably 0.150 or less. Yes, particularly preferably 0.100 or less, and still more preferably 0.050 or less.
Regarding the photopolymerization initiator (C), the minimum value of the negative partial charge in the molecule of the compound is preferably −0.350 or more, more preferably −0.200 or more, and further preferably −0. 150 or more, particularly preferably −0.100 or more, and still more preferably −0.050 or more.
By setting the positive partial charge and the negative partial charge in the molecule within such ranges, the quantum efficiency of the quantum dots in the resin film can be further improved.

  The content of the photopolymerization initiator (C) is preferably 0.5 to 30% by mass and more preferably 1 to 20% by mass with respect to the mass of the entire solid content of the photosensitive composition. By setting the content of the photopolymerization initiator (C) in the above range, it is possible to obtain a photosensitive composition that has good sensitivity and hardly causes pattern shape defects.

  Moreover, you may combine a photoinitiator adjuvant with a photoinitiator (C). Examples of the photoinitiator include triethanolamine, methyldiethanolamine, triisopropanolamine, methyl 4-dimethylaminobenzoate, ethyl 4-dimethylaminobenzoate, isoamyl 4-dimethylaminobenzoate, 2-dimethylaminobenzoic acid 2- Ethylhexyl, 2-dimethylaminoethyl benzoate, N, N-dimethylparatoluidine, 4,4′-bis (dimethylamino) benzophenone, 9,10-dimethoxyanthracene, 2-ethyl-9,10-dimethoxyanthracene, 9, 10-diethoxyanthracene, 2-ethyl-9,10-diethoxyanthracene, 2-mercaptobenzothiazole, 2-mercaptobenzoxazole, 2-mercaptobenzimidazole, 2-mercapto-5-methoxybenzothiazole 3-mercaptopropionic acid, 3-mercaptopropionic acid methyl, pentaerythritol tetra-mercapto acetate, thiol compounds such as 3-mercapto propionate. These photoinitiation assistants can be used alone or in combination of two or more.

<Quantum dot (D)>
A photosensitive composition contains a quantum dot (D) with the above-mentioned photoinitiator (C). When the photopolymerization initiator (C) satisfies the above-described predetermined requirements for the partial charges in the molecule, a cured film having high quantum efficiency of fluorescence with respect to excitation light can be formed using the photosensitive composition.

As long as the quantum dot (D) is a fine particle that functions as a quantum dot, its structure and its constituent components are not particularly limited.
From the viewpoint of achieving both safety and good light emission characteristics of the cured film formed using the photosensitive composition, the quantum dot (D) does not contain Cd or Pb as a constituent component, In or Si or the like. Is preferably included as a constituent component, and more preferably includes In. That is, it is preferable that the quantum dot (D) contains a compound containing In.

  Since it is easy to form a cured film having good light emission characteristics using the photosensitive composition, the quantum dot (D) has a group 2 element, a group 12 element, a group 13 element, a group 14 element, a group 15 element, and 16 It is preferable to include at least two elements selected from the group consisting of group elements.

Specific examples of elements suitable as constituents of the quantum dot (D) include Be, Mg, Ca, Sr, Ba, Cu, Ag, Au, Zn, B, Al, Ga, In, Tl, C, Si, Ge, Sn, N, P, As, Sb, Bi, O, S, Se, Te, and Po.
The quantum dot (D) is preferably made of a compound containing at least two elements selected from the group of the above preferable elements.

  From the viewpoint of light emission characteristics as a light emitting layer for a light emitting display, the quantum dot (D) has a compound (D1) having a fluorescence maximum in a wavelength range of 500 to 600 nm and a fluorescence maximum in a wavelength range of 600 to 700 nm. It is preferable to include at least one selected from the group consisting of the compound (D2), and more preferable to include at least one selected from the group consisting of the compound (D1) and the compound (D2).

The quantum dot (D) containing one or more selected from the group consisting of the compound (D1) and the compound (D2) is at least one of a wavelength region of 500 to 600 nm and a wavelength region of 600 to 700 nm. Have a fluorescence maximum.
As a result, when a photosensitive composition containing such quantum dots (D) is used, a cured film suitable as a light-emitting layer of a light-emitting display element that displays an image using light in the visible range can be formed.

  Among the quantum dots (D) described above, quantum dots containing a compound containing In as a constituent component are preferable. Moreover, the quantum dot containing Si compound is also preferable.

The structure of the quantum dot (D) may be a homogeneous structure composed of one kind of compound or a complex structure composed of two or more kinds of compounds. In the case of a composite structure, the way in which two or more compounds are contained in the quantum dot (D) is not particularly limited.
The quantum dot (D) containing two or more compounds is preferably a core-shell structure quantum dot in which the core is covered with one or more shell layers, and the core is covered with a single shell layer. A quantum dot having a structure is more preferable.

In the quantum dot having the core-shell structure, the core is covered with a shell layer made of a material different from the core material. For example, by covering the core semiconductor with a semiconductor having a larger band gap, excitons (electron-hole pairs) generated by photoexcitation are confined in the core.
As a result, the probability of non-radiative transition on the surface of the quantum dot is reduced, and the quantum yield of light emission and the stability of the fluorescence characteristics are improved.

As for specific examples of the quantum dots (D), examples of the core-shell type quantum dots (D) include InP / ZnS, CuInS ₂ / ZnS, and (ZnS / AgInS ₂ ) solid solution / ZnS.
Preferable specific examples of the quantum dots of homogeneous structure type having no shell layer (D), AgInS _2, and Zn can be cited AgInS ₂ doped.
In the above, the material of the core-shell type quantum dots (D) is described as (core material) / (shell layer material).
Two or more kinds of the quantum dots (D) may be used in combination, or a core-shell type quantum dot (D) and a homogeneous structure type quantum dot (D) may be used in combination.

The average particle diameter of the quantum dot (D) is not particularly limited as long as it is within a range that can function as a quantum dot, and is preferably 0.5 to 20 nm, more preferably 1.0 to 10 nm.
The quantum dot (D) having an average particle diameter within such a range exhibits a quantum confinement effect, functions well as a quantum dot, is easy to prepare, and has stable fluorescence characteristics.
The average particle diameter of the quantum dots (D) is, for example, by applying and drying a dispersion of quantum dots (D) on a substrate to remove volatile components, and then observing the surface of the transmission electron microscope (TEM). Can be defined by observing. Typically, this average particle diameter can be defined as the number average diameter of the equivalent circle diameter of each particle obtained by image analysis of a TEM image.

The shape of the quantum dot (D) is not particularly limited. Examples of the shape of the quantum dot (D) include a spherical shape, an elliptical spherical shape, a cylindrical shape, a polygonal column shape, a disc shape, and a polyhedral shape.
Among these, the spherical shape is preferable from the viewpoint of easy handling and availability.

The manufacturing method of a quantum dot (D) is not specifically limited. Quantum dots manufactured by various known methods can be used as the quantum dots (D).
As a manufacturing method of a quantum dot (D), the method of thermally decomposing an organometallic compound in a coordinating organic solvent is employable, for example.
In addition, the core-shell structure type quantum dots (D) are produced by a method in which a homogeneous core is formed by reaction and then a shell layer precursor is reacted in the presence of the dispersed core to form a shell layer. it can.
Various commercially available quantum dots (D) can also be used.

  It is preferable that content of a quantum dot (D) is 3-80 mass% with respect to the mass of the whole solid content of the photosensitive composition, and it is more preferable that it is 5-70 mass%. By making content of a quantum dot (D) into said range, it is easy to obtain the photosensitive composition which can form the cured film which has high internal quantum efficiency and can be used suitably as a light emitting layer in a light emitting display element.

<Organic solvent (S)>
The photosensitive composition preferably contains an organic solvent (S) for improving coating properties and adjusting the viscosity.

  Specific examples of the organic solvent (S) include ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol mono-n-propyl ether, ethylene glycol mono-n-butyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol mono -N-propyl ether, diethylene glycol mono-n-butyl ether, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol mono-n-propyl ether, propylene glycol mono- n-butyl ether, dipropylene glycol monomethyl ether (Poly) alkylene glycol monoalkyl ethers such as dipropylene glycol monoethyl ether, dipropylene glycol mono-n-propyl ether, dipropylene glycol mono-n-butyl ether, tripropylene glycol monomethyl ether, tripropylene glycol monoethyl ether (Poly) alkylene glycol monoalkyl such as ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, diethylene glycol monomethyl ether acetate, diethylene glycol monoethyl ether acetate, propylene glycol monomethyl ether acetate (PGMEA), propylene glycol monoethyl ether acetate Ether acetates; Other ethers such as lenglycol dimethyl ether, diethylene glycol methyl ethyl ether, diethylene glycol diethyl ether, tetrahydrofuran; ketones such as methyl ethyl ketone, cyclohexanone, 2-heptanone, 3-heptanone; methyl 2-hydroxypropionate, ethyl 2-hydroxypropionate Alkyl lactates such as ethyl 2-hydroxy-2-methylpropionate, methyl 3-methoxypropionate, ethyl 3-methoxypropionate, methyl 3-ethoxypropionate, ethyl 3-ethoxypropionate, ethyl ethoxyacetate, Ethyl hydroxyacetate, methyl 2-hydroxy-3-methylbutanoate, 3-methoxybutyl acetate, 3-methyl-3-methoxybutyl acetate, 3-methyl -3-Methoxybutylpropionate, ethyl acetate, n-propyl acetate, i-propyl acetate, n-butyl acetate, i-butyl acetate, n-pentyl formate, i-pentyl acetate, benzyl acetate, n-butyl propionate , Ethyl butyrate, n-propyl butyrate, i-propyl butyrate, n-butyl butyrate, methyl pyruvate, ethyl pyruvate, n-propyl pyruvate, methyl acetoacetate, ethyl acetoacetate, ethyl 2-oxobutanoate etc. Esters; aromatic hydrocarbons such as toluene and xylene; N-methyl-2-pyrrolidone, N, N-dimethylformamide, N, N-dimethylacetamide, N, N-dimethylisobutyramide, N, N-diethylacetamide N, N-diethylformamide, N-methylcaprolactam, 1,3-dimethyl-2-yl Dazorijinon, pyridine, and N, N, N ', N'- tetramethylurea nitrogen-containing polar organic solvent; and the like.

Among these, alkylene glycol monoalkyl ethers, alkylene glycol monoalkyl ether acetates, other ethers described above, alkyl lactate esters, and other esters described above are preferable, alkylene glycol monoalkyl ether acetates described above. Other ethers and other esters described above such as benzyl acetate are more preferred.
Moreover, it is preferable that the organic solvent (S) contains a nitrogen-containing polar organic solvent in terms of the solubility of each component. As the nitrogen-containing polar organic solvent, N, N, N ′, N′-tetramethylurea or the like can be used.
These solvents can be used alone or in combination of two or more.

  Content of an organic solvent (S) is not specifically limited, It is a density | concentration which can be apply | coated to a board | substrate etc., and is suitably set according to a coating film thickness. The viscosity of the photosensitive composition is preferably 1 to 300 cp, more preferably 3 to 200 cp, and even more preferably 5 to 100 cp. Moreover, it is preferable that solid content concentration is 5-100 mass%, and it is more preferable that it is 10-75 mass%.

<Other ingredients>
The photosensitive composition can contain additives such as a surfactant, an adhesion improver, a thermal polymerization inhibitor, an antifoaming agent, a silane coupling agent, and a leveling agent as necessary. Any additive can be used as the additive.
The photosensitive composition preferably contains a silane coupling agent because it is easy to form a cured film having a good shape and excellent adhesion to the substrate. A conventionally known silane coupling agent can be used without particular limitation.
Examples of the surfactant include anionic, cationic, and nonionic compounds, examples of the thermal polymerization inhibitor include hydroquinone and hydroquinone monoethyl ether, and examples of the antifoaming agent include silicone and fluorine. Compounds and the like.

<Method for preparing photosensitive composition>
The photosensitive composition demonstrated above is obtained by mixing each said component each predetermined amount, and mixing uniformly with a stirrer. In addition, you may filter using a filter so that the obtained mixture may become a more uniform thing.
In addition, a quantum dot (D) may be used for preparation of the photosensitive composition as a dispersion liquid disperse | distributed to a part of organic solvent (S).

≪Method for producing cured film≫
As a manufacturing method of a cured film, the conventionally known manufacturing method of a cured film using the photosensitive composition containing a photopolymerizable compound (B) can be employ | adopted without limitation.

As a suitable manufacturing method of the cured film,
Applying the photosensitive composition as described above to form a coating film;
And a step of exposing the coating film.

  In order to form a cured film using the photosensitive composition, first, the photosensitive composition is applied on a substrate selected according to the use of the cured film to form a coating film. The method for forming the coating film is not particularly limited. For example, the coating film is formed using a contact transfer type coating device such as a roll coater, a reverse coater, or a bar coater, or a non-contact type coating device such as a spinner (rotary coating device) or a curtain flow coater. Is called.

  The applied photosensitive composition is dried as necessary to form a coating film. The drying method is not particularly limited. For example, (1) a method of drying on a hot plate at 80 to 120 ° C., preferably 90 to 100 ° C. for 60 to 120 seconds, (2) several hours at room temperature Examples include a method of leaving for several days, and (3) a method of removing the solvent by putting it in a warm air heater or an infrared heater for several tens of minutes to several hours.

Next, the coating film is exposed. The exposure is performed by irradiating active energy rays such as ultraviolet rays and excimer laser light. The exposure may be performed on the entire surface of the coating film, and may be performed position-selectively by, for example, a method of performing exposure through a negative mask.
The energy dose to be irradiated varies depending on the composition of the photosensitive composition, but is preferably about 40 to 200 mJ / cm ² , for example.
When exposure is performed on the entire surface of the coating film, an unpatterned cured film having a shape corresponding to the shape of the coating film is formed.

  When the coating film is exposed in a position-selective manner, the exposed film is developed with a developing solution, whereby the unexposed portion is dissolved and removed in the developing solution to form a patterned cured film. The development method is not particularly limited, and for example, an immersion method, a spray method, or the like can be used. The developer is appropriately selected according to the composition of the photosensitive composition. As the developer, for example, a basic aqueous solution of sodium hydroxide, potassium hydroxide, sodium carbonate, ammonia, quaternary ammonium salt (TMAH, etc.) can be used.

Next, the patterned cured film is baked (post-baked) as necessary. The baking temperature is not particularly limited, but is preferably 150 to 250 ° C, and more preferably 1800 to 230 ° C. The baking time is typically 5 to 90 minutes, preferably 10 to 60 minutes.
By baking as described above, a cured film of the photosensitive composition can be obtained.

  The cured film containing quantum dots (D) formed in this manner is excellent in internal quantum efficiency and is suitably used as a light emitting layer in a light emitting display element.

<< Light-emitting display element and light-emitting layer >>
Hereinafter, a light-emitting display element including the cured film as a light-emitting layer will be described.
A light emitting display element is comprised using the wavelength conversion board | substrate which uses the cured film formed using the above-mentioned photosensitive composition as a light emitting layer.
FIG. 1 is a cross-sectional view schematically showing a configuration of a typical light emitting display element.

  The light emitting display element 100 includes a wavelength conversion substrate 11 configured by providing a light emitting layer 13 (13a, 13b, 13c) and a black matrix 14 on a substrate 12, and an adhesive layer 15 on the wavelength conversion substrate 11. And a light source substrate 18 bonded together.

  The substrate 12 is made of glass, quartz, or a transparent resin (for example, transparent polyimide, polyethylene naphthalate, polyethylene terephthalate, polybutylene terephthalate, cyclic olefin resin film, or the like).

The light emitting layer 13 in the wavelength conversion substrate 11 is a cured film formed by curing the above-described photosensitive composition. The light emitting layer 13 is preferably formed by patterning by the photolithography method using the above-described photosensitive composition.
The light emitting layer 13 is preferably formed according to the above-described method for producing a cured film.

  The wavelength conversion substrate 11 converts the wavelength of the excitation light emitted from the excitation light source 17 in the light source substrate 18 by the action of the quantum dots (D) contained in each of the light emitting layers 13, and emits fluorescence having a desired wavelength.

In the wavelength conversion substrate 11, each of the light emitting layer 13a, the light emitting layer 13b, and the light emitting layer 13c includes different quantum dots (D), and can emit different fluorescence.
For example, in the wavelength conversion substrate 11, the light emitting layer 13a converts excitation light into red light, the light emitting layer 13b converts excitation light into green light, and the light emitting layer 13c converts excitation light into blue light. Can be configured.
In that case, in each of the three types of photosensitive compositions used for forming the light emitting layers 13a, 13b, and 13c so that each of the light emitting layers 13a, 13b, and 13c has a desired fluorescence characteristic, quantum dots ( The type of D) is selected.

And the light emitting layer 13a, the light emitting layer 13b, and the light emitting layer 13c are sequentially carried out by repeating and implementing the manufacturing method of the above-mentioned cured film using three types of photosensitive compositions containing a respectively different quantum dot (D). It is formed.
In this way, the light emitting layer 13 is formed on the substrate 12, and the wavelength conversion substrate 11 is obtained.

The thickness of the light emitting layer 13 in the wavelength conversion substrate 11 is preferably 100 nm to 100 μm, and more preferably 1 μm to 100 μm.
When the thickness of the light emitting layer 13 is within such a range, the light emitting layer 13 sufficiently absorbs excitation light, whereby high light conversion efficiency is obtained, and thereby the luminance of the light emitting display element is excellent.
In light of particularly good luminance of the light emitting display element, the thickness of the light emitting layer 13 is preferably 1 μm or more.

A black matrix 14 is disposed between the light emitting layers 13 on the substrate 12. The black matrix 14 can be formed by patterning in accordance with a known method using a known light-shielding material.
Note that the black matrix 14 is not an essential component in the wavelength conversion substrate 11, and the black matrix 14 may not be provided on the wavelength conversion substrate 11.

The adhesive layer 15 is formed using a known adhesive that transmits ultraviolet light or blue light having a wavelength described later.
As shown in FIG. 1, the adhesive layer 15 does not need to be provided on the substrate 12 so as to cover the entire surface of the light emitting layers 13 a, 13 b, and 13 c, and is provided only around the wavelength conversion substrate 11. May be.

The light source substrate 18 includes a substrate 16 and a light source 17 disposed on the wavelength conversion substrate 11 side of the substrate 16. Each of the light sources 17 emits ultraviolet light or blue light as excitation light.
The light source 17 is not particularly limited, and various light emitting sources produced by known materials and known manufacturing methods can be used. Preferably, an ultraviolet light emitting organic EL element having a known structure, a blue light emitting organic EL element, or the like is used.
As the ultraviolet light, light having a main emission peak in a wavelength range of 360 to 435 nm is preferable. The blue light is preferably light having a main emission peak in the wavelength range of 435 to 480 nm.
It is desirable that the light source 17 has directivity so that each emitted light enters the light emitting layer 13 facing each other.

The light-emitting display element 100 uses the three types of quantum dots (D) included in the light-emitting layers 13a, 13b, and 13c so that the wavelengths of the excitation light emitted from the light sources 17a, 17b, and 17c are opposed to the light sources, respectively. Convert.
In this way, the excitation light from the light source 17 is converted into visible light having a desired wavelength and used for display.

In the light emitting display element 100, the portion provided with the light emitting layer 13a constitutes a sub-pixel that performs red display. That is, the light emitting layer 13 a in the wavelength conversion substrate 11 converts the excitation light from the light source 17 a facing the light source substrate 18 into red.
In addition, the portion where the light emitting layer 13b is provided constitutes a sub-pixel that performs green display. That is, the light emitting layer 13b converts the excitation light from the light source 17b facing the light source substrate 18 to green.
Furthermore, the portion provided with the light emitting layer 13c constitutes a sub-pixel that performs blue display. That is, the light emitting layer 13c converts the excitation light from the light source 17c facing the light source substrate 18 into blue.

  The light-emitting display element 100 includes one pixel, which is a minimum unit constituting an image, by three types of a sub-pixel including the light-emitting layer 13a, a sub-pixel including the light-emitting layer 13b, and a sub-pixel including the light-emitting layer 13c.

The light-emitting display element 100 having the above configuration includes red, green, and blue light for each of the sub-pixel including the light-emitting layer 13a, the sub-pixel including the light-emitting layer 13b, and the sub-pixel including the light-emitting layer 13c. Light emission is controlled.
Then, for each pixel composed of three types of sub-pixels, the emission of red, green, and blue light is controlled, and full-color display is performed.

In the light emitting display element, a color filter (not shown) may be provided between the light emitting layer 13 and the substrate 12.
Specifically, a red color filter is provided between the light emitting layer 13 a and the substrate 12, a green color filter is provided between the light emitting layer 13 b and the substrate 12, and the space between the light emitting layer 13 c and the substrate 12. Can be provided with a blue color filter.
In the light-emitting display element described above, the color purity of display can be increased by providing a color filter. Here, a color filter used in a well-known image display element such as a liquid crystal display element can also be applied to the light emitting display element 100.

  EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples. However, the scope of the present invention is not limited to these examples.

Examples and comparative examples
In the examples and comparative examples, the following materials were used.
As the alkali-soluble resin (A), a copolymer of glycidyl methacrylate / methacrylic acid / styrene / methacrylic acid (molar ratio: 40/20/20/20) was used. The weight average molecular weight of the alkali-soluble resin was 7000.
Dipentaerythritol hexaacrylate was used as the photopolymerizable compound (B).
As the photopolymerization initiator (C), the following C-1 was used in the examples, and the following C-2 was used in the comparative examples.
As the silane coupling agent, 3-glycidoxypropyltrimethoxysilane (KBM-403, manufactured by Shin-Etsu Silicone) was used.
BYK-310 (manufactured by Big Chemie) was used as a leveling agent.

Regarding the photopolymerization initiator (C), in C-1 above, the maximum value of the positive partial charge in the molecule calculated according to the extended Hückel method is 0.019, and the minimum value of the negative partial charge is − 0.004.
In C-1 above, the maximum value of the positive partial charge in the molecule was 0.115, and the minimum value of the negative partial charge was -0.825.

As the quantum dot (D), a quantum dot having a core-shell structure composed of a core made of InP and a shell layer made of ZnS was used.
Such quantum dots (D) are described in Journal of American Chemical Society. 2007, 129, 15432-15433.
The quantum dot (D) has a solid content concentration of 12% by mass in which the quantum dot (D) is dispersed in a mixed solvent consisting of 50% by mass of propylene glycol monomethyl ether, 40% by mass of diethylene glycol methyl ethyl ether, and 10% by mass of cyclohexanone. The dispersion was used for the preparation of the photosensitive composition.

59 parts by weight of an alkali-soluble resin (A), 31.2 parts by weight of a photopolymerizable compound (B), 5.8 parts by weight of a photopolymerization initiator (C), 2 parts by weight of a silane coupling agent, and a leveling agent 2 parts by mass was obtained in a mixed solvent consisting of 50% by mass of propylene glycol monomethyl ether, 40% by mass of diethylene glycol methyl ethyl ether, and 10% by mass of cyclohexanone so that the solid content concentration was 25% by mass. .
The obtained solution and the dispersion of quantum dots were mixed at a volume ratio of 1: 1 to obtain a photosensitive composition of the example.
In addition, the photosensitive composition was the same as in the examples except that the amount of the photopolymerizable compound (B) used was changed to 35 parts by mass and the amount of the photopolymerization initiator (C) used was changed to 2 parts. I got a thing.

Using the obtained photosensitive composition, quantum efficiency was confirmed about each according to the following method. As a result, it was confirmed that the value of the quantum efficiency of the example was 3.6 times the value of the quantum efficiency of the comparative example.
<Quantum efficiency evaluation method>
About the liquid photosensitive composition obtained by the Example and the comparative example, the quantum efficiency was measured on room temperature conditions using the quantum efficiency measurement system (QE-2000, Otsuka Electronics Co., Ltd. product).

From the above, a compound having a maximum value of positive partial charges in the molecule of 0.500 or less and a minimum value of negative partial charges of −0.500 or more calculated according to the extended Hückel method is used as a photopolymerization initiator. In contrast to the photosensitive compositions of Examples included as (C) having excellent quantum efficiency, the photosensitive composition containing the photopolymerization initiator (C) that does not satisfy the predetermined conditions may be inferior in quantum efficiency. I understand.
In addition, it is obvious that the cured film formed using the photosensitive composition excellent in quantum efficiency is also excellent in quantum efficiency.

100 Light-Emitting Display Element 11 Wavelength Conversion Substrate 12 Substrate 13 Light-Emitting Layer 14 Black Matrix 15 Adhesive Layer 16 Substrate 17 Light Source 18 Light Source Substrate

Claims (9)

An alkali-soluble resin (A), a photopolymerizable compound (B), a photopolymerization initiator (C), and quantum dots (D);
When the photopolymerization initiator (C) is calculated according to the extended Hückel method, the maximum value of positive partial charges in the molecule is 0.500 or less, and the minimum value of negative partial charges is −0.500 or more. A photosensitive composition comprising a compound. The photopolymerization initiator (C) is a compound having an oxime ester group represented by> C═N—O—CO—R ^c0 , where R ^c0 is an aliphatic hydrocarbon group having 1 to 6 carbon atoms. The photosensitive composition according to claim 1, wherein   The quantum dot (D) includes at least two elements selected from the group consisting of a group 2 element, a group 12 element, a group 13 element, a group 14 element, a group 15 element, and a group 16 element. 2. The photosensitive composition according to 2.   The photosensitive composition of any one of Claims 1-3 in which the said quantum dot (D) contains the compound containing In.   The cured film formed by hardening | curing the photosensitive composition of any one of Claims 1-4.   The light emitting layer for light emitting display elements formed by hardening | curing the photosensitive composition of any one of Claims 1-4.   A light emitting display element comprising the light emitting layer according to claim 6. Applying the photosensitive composition according to any one of claims 1 to 4 on a substrate to form a coating film;
And a step of exposing the coating film. The coating film is exposed position-selectively,
The method for forming a light emitting layer according to claim 8, further comprising developing the exposed coating film.

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