KR20190109059A - A black photo sensitive resin composition, an organic light emitting diode prepared by using the composition, and a display device comprising the organic light emitting diode - Google Patents

Abstract

The present invention relates to a black photosensitive resin composition, which comprises: (A) a colorant; (B) an alkali-soluble resin; (C) a photopolymerizable compound; (D) a photopolymerization initiator; and (E) a solvent, wherein the (A) colorant comprises: carbon black; lactam black; and two or more selected from the group consisting of C.I. pigment black 1, C.I. pigment black 32, C.I. pigment blue 15:6 and C.I. pigment blue 60, to an organic light emitting element produced using the same, and to a liquid crystal display device comprising the organic light emitting element.

Description

A photosensitive resin composition, an organic light emitting diode prepared by using the composition, and a display device comprising the organic light emitting diode}

The present invention relates to a black photosensitive resin composition, a pixel definition film manufactured using the same, an organic light emitting device including the pixel definition film, and a display device including the organic light emitting device.

One of the flat panel display devices, organic light emitting diodes are self-luminous, so they have better viewing angles and contrast than liquid crystal display devices. Since it does not require a back light, it can be light and thin, and is advantageous in terms of power consumption. In addition, DC low voltage drive is possible, response speed is fast, and all the components are solid, so it is resistant to external impact, wide use temperature range, and low cost in terms of manufacturing cost. In particular, unlike the liquid crystal display device or plasma display panel (PDP), the manufacturing process of the organic light emitting device is a repetition and encapsulation process of the deposition / etching process. It has the advantage of being very simple.

 The organic light emitting diode should have good contrast and brightness, but the contrast is not good when the external light is bright. In particular, in the case of the bottom emission type organic light emitting device, since the cathode of the device is made of a metal having excellent reflectivity, the light coming into the device from the outside is reflected on the cathode surface and mixed with the light emitted from the light emitting layer. In order to solve such a problem, most organic light emitting diodes reduce reflection of external incident light by a cathode by forming a circular polarizer under the transparent substrate. That is, when light is incident from the outside, half is blocked by the circular polarizing plate, and the other half that is not blocked is blocked when it is reflected on the cathode surface, thereby reducing contrast decrease due to external light.

 However, the organic light emitting device having the circularly polarizing plate attached to the above-mentioned transparent substrate greatly reduces the reflection of external incident light by the cathode and at the same time blocks the light emitted from the organic light emitting layer to the outside, so that the contrast is improved but the luminance is 50%. There is a problem that is reduced, and the high cost is caused by the introduction of the circular polarizing plate.

 In order to solve the problem, a black pixel defined layer may be formed to absorb external incident light to improve contrast. The black pixel definition layer is precisely patterned through a photolithography process and subjected to a high pressure deposition process for fabricating an organic light emitting device pixel. However, the photosensitive resin composition for BM (Black Matrix) used in the conventional liquid crystal display device (VM) is a gas component that is fatal to drive the organic light emitting device during the high-pressure deposition process of manufacturing the organic light emitting device pixels to reduce the luminance decrease It may cause, and in severe cases there is a problem that the driving of the organic light emitting device is impossible.

In this regard, Korean Patent No. 10-0814660 discloses a black photosensitive resin composition containing an acrylic compound, but it appears that the outgas characteristic in the high pressure deposition process is not sufficient. Accordingly, development of a new black photosensitive resin composition in addition to the photosensitive resin composition containing an acrylic compound, which is conventionally used in a liquid crystal display device, is required as a material for forming the pixel definition layer.

Republic of Korea Patent No. 10-0814660

The present invention has been made in order to solve the problems of the prior art, and even in the case of a high-pressure deposition process for manufacturing an organic light emitting device pixel, a black photosensitive resin composition having excellent reliability with little dissolution of a gaseous component which is fatal to drive the device. The purpose is to provide.

Another object of the present invention is to provide a pixel definition film made of the black photosensitive resin composition and an organic light emitting device including the pixel definition film.

A black photosensitive resin composition containing (A) a coloring agent, (B) alkali-soluble resin, (C) photopolymerizable compound, (D) photoinitiator, and (E) solvent, The said (A) coloring agent is carbon black; Lactam black; And C.I. Pigment Black 1, C.I. Pigment Black 32, C.I. Pigment Blue 15: 6 and C.I. Pigment Blue 60 provides a black photosensitive resin composition comprising two or more selected from the group consisting of.

The present invention also provides a pixel definition film made of the black photosensitive resin composition of the present invention.

The present invention also provides an organic light emitting device including the pixel definition layer of the present invention.

The black photosensitive resin composition of the present invention is excellent in optical density and electrical insulation for imparting light shielding properties, and in particular, in the high pressure deposition process for manufacturing organic light emitting diode pixels, the outgas generation characteristics are excellent. It is possible to provide a pixel definition film which can prevent the mixing of color and effectively prevent the reflection of external light. Therefore, the black photosensitive resin composition of the present invention can be usefully used for manufacturing an organic light emitting device.

Hereinafter, the present invention will be described in more detail.

The present invention provides a black photosensitive resin composition comprising (A) a colorant, (B) an alkali-soluble resin, (C) a photopolymerizable compound, (D) a photopolymerization initiator, and (E) a solvent, wherein the (A) colorant comprises carbon black; Lactam black; And C.I. Pigment Black 1, C.I. Pigment Black 32, C.I. Pigment Blue 15: 6 and C.I. It relates to a black photosensitive resin composition characterized in that it comprises two or more selected from the group consisting of Pigment Blue 60, the outgassing characteristics when using two or more specific pigments in combination with carbon black and lactam black as a colorant Experimentally confirmed that it can be improved to complete the present invention.

Hereinafter, the black photosensitive resin composition of this invention is demonstrated in detail for every component.

(A) colorant

The colorant includes at least one light-shielding pigment selected from black inorganic pigments, black organic pigments, and mixed organic pigments.

As the black inorganic pigment, two or more kinds selected from carbon black, chromium oxide, iron oxide, and titanium black may be appropriately selected and used. Preferably, carbon black is selected in terms of light shielding properties, surface smoothness, dispersion stability, and compatibility with resins. Can be used.

As said black organic pigment, lactam black, perylene black, cyanine black, aniline black, etc. are mentioned, for example, Preferably lactam black can be used.

As the mixed organic pigment, a similarly blackened compound may be used by mixing at least two or more pigments selected from red, blue, green, yellow, cyanine, magenta and the like, and preferably C.I. Pigment Black 1, C.I. Pigment Black 32, C.I. Pigment Blue 15: 6 and C.I. Pigment Blue 60 may be used in combination of two or more selected from the group consisting of.

30 wt% or more, preferably 30 to 50 wt% with respect to the total weight of the mixed organic pigment colorant, and when the mixed organic pigment is included in the above range, there is an advantage of minimizing outgas generation in the manufactured black bank. .

The colorant may further include a purple pigment as an additional colorant. The violet pigment may be used without limitation as long as it is a known one, and preferably C.I. Pigment Violet 29 may be used.

The colorant may be included in 10 to 50% by weight, preferably 20 to 45% by weight based on the total weight of the black photosensitive resin composition. When the colorant is included in the above range, there is an advantage in that the blocking effect of the reflection caused by the light coming into the device from the outside is excellent.

(B) alkali soluble resin

The alkali-soluble resin usually has reactivity and alkali solubility by the action of light or heat, and acts as a dispersion medium of the colorant (A).

The alkali-soluble resin may include a copolymer represented by the following formula (1).

[Formula 1]

(In Formula 1, X is a group represented by the formula (2),

Y is maleic anhydride, succinic anhydride, itaconic anhydride, phthalic anhydride, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, methyl end methylenetetrahydrophthalic anhydride, chloric anhydride, methyltetrahydro phthalic anhydride and glutaric anhydride It is a residue except carboxylic anhydride group (-CO-O-CO-) from the dicarboxylic acid anhydride comprised,

Z is a residue except two carboxylic anhydride groups from tetracarboxylic dianhydride composed of pyromellitic anhydride, benzophenonetetracarboxylic dianhydride, biphenyltetracarboxylic dianhydride and biphenylethertetracarboxylic dianhydride.

n is an integer of 5 to 15.)

[Formula 2]

(In Formula 2, * represents a bond to a carbon atom.)

It is preferable to use the mass mean molecular weight of said alkali-soluble resin which is 3,000-10,000. When the mass average molecular weight of alkali-soluble resin satisfy | fills the said range, a coating film can be formed uniformly and can have favorable developability.

The alkali-soluble resin may be included in 2 to 20% by weight, preferably 5 to 10% by weight based on the total weight of the black photosensitive resin composition. The content range is selected in consideration of various solubility and pattern formation in the developer. When the alkali-soluble resin is included in the above range, the solubility in the developer is sufficient, so that the pattern is easily formed. Film reduction is prevented, and the omission of non-pixel portions is improved.

(C) photopolymerizable compound

The said photopolymerizable compound (C) is a compound which can superpose | polymerize by the action of the photoinitiator mentioned later, A monofunctional monomer, a bifunctional monomer, another polyfunctional monomer, etc. are mentioned.

The kind of the monofunctional monomer is not particularly limited, and for example, nonylphenylcarbitol acrylate, 2-hydroxy-3-phenoxypropyl acrylate, 2-ethylhexyl carbitol acrylate, 2-hydroxyethyl acryl The rate, N-vinylpyrrolidone, etc. are mentioned.

The kind of the said bifunctional monomer is not specifically limited, For example, 1, 6- hexanediol di (meth) acrylate, ethylene glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, and triethylene Glycol di (meth) acrylate, bis (acryloyloxyethyl) ether of bisphenol A, 3-methylpentanediol di (meth) acrylate, and the like.

The kind of the polyfunctional monomer is not particularly limited, and examples thereof include trimethylolpropane tri (meth) acrylate, ethoxylated trimethylol propane tri (meth) acrylate, and propoxylated trimethylolpropane tree (meth). ) Acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol tri (meth) acrylate, dipentaerythritol penta (meth) acrylate, ethoxylated dipentaerythritol hexa (Meth) acrylate, propoxylated dipentaerythritol hexa (meth) acrylate, dipentaerythritol hexa (meth) acrylate, etc. are mentioned.

Commercially available examples of the photopolymerizable compound include, but are not limited to, Miramer M600 manufactured by Miwon Corporation.

The photopolymerizable compound may be used in an amount of 1 to 15% by weight, preferably 2 to 10% by weight, based on the total weight of the black photosensitive resin composition. When the photopolymerizable compound is included in the above range, there is a preferable advantage in terms of the strength and smoothness of the pixel portion.

(D) photoinitiator

The photoinitiator can use a photoinitiator generally used for a black photosensitive resin composition. For example, acetophenone series, benzophenone series, triazine series, thioxanthone series, oxime series, benzoin series, biimidazole series compounds and the like can be used.

Acetophenone compounds include diethoxyacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, benzyldimethyl ketal, 2-hydroxy-1- [4- (2-hydroxyethoxy) Phenyl] -2-methylpropan-1-one, 1-hydroxycyclohexylphenyl ketone, 2-methyl-1- (4-methylthiophenyl) -2-morpholinopropan-1-one, 2-benzyl- Oligomers of 2-dimethylamino-1- (4-morpholinophenyl) butan-1-one and 2-hydroxy-2-methyl [4- (1-methylvinyl) phenyl] propan-1-one are possible. Among them, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) butan-1-one can be preferably used.

As the benzophenone compound, benzophenone, benzoyl benzoic acid, benzoyl benzoic acid methyl, 4-phenyl benzophenone, hydroxy benzophenone, acrylated benzophenone, 4,4'-bis (dimethyl amino) benzophenone, 4,4'-bis (Diethyl amino) benzophenone and the like are possible.

Triazine compounds include 2,4,6-trichloro-s-triazine, 2-phenyl-4,6-bis (trichloromethyl) -s-triazine, 2- (3 ', 4'-dimethoxy Styryl) -4,6-bis (trichloromethyl) -s-triazine, 2- (4'-methoxy naphthyl) -4,6-bis (trichloromethyl) -s-triazine, 2- (p-methoxy phenyl) -4,6-bis (trichloromethyl) -s-triazine, 2- (p-tril) -4,6-bis (trichloromethyl) -s-triazine, 2- Biphenyl-4,6-bis (trichloromethyl) -s-triazine, bis (trichloromethyl) -6-styryl-s-triazine, 2- (naphtho 1-yl) -4,6- Bis (trichloro methyl) -s-triazine, 2- (4-methoxy naphtho 1-yl) -4,6-bis (trichloro methyl) -s-triazine, 2,4-trichloro methyl ( Piperonyl) -6-triazine, 2,4-trichloro methyl (4′-methoxy styryl) -6-triazine and the like.

Examples of the thioxanthone compound include 2-isopropyl thioxanthone, 2,4-diethyl thioxanthone, 2,4-dichloro thioxanthone, 1-chloro-4-propoxy thioxanthone, and the like.

Examples of the oxime compound include o-ethoxycarbonyl-α-oxyimino-1-phenylpropan-1-one, and commercially available products include Ciba's OXE-01, OXE-02, and Basf's Irgacure OXE03. .

As the benzoin compound, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin isobutyl ether, benzyl dimethyl ketal and the like can be used.

Biimidazole type compounds include 2,2'-bis (2-chlorophenyl) -4,4 ', 5,5'-tetraphenylbiimidazole, 2,2'-bis (2,3-dichlorophenyl) -4,4 ', 5,5'-tetraphenylbiimidazole, 2,2'-bis (2-chlorophenyl) -4,4', 5,5'-tetra (alkoxyphenyl) biimidazole, 2 , 2'-bis (2-chlorophenyl) -4,4 ', 5,5'-tetra (trialkoxyphenyl) biimidazole, the phenyl group at 4,4', 5,5 'position Substituted imidazole compound etc. are possible.

The photopolymerization initiator may be included in an amount of 0.01 to 10% by weight, preferably 0.01 to 5% by weight, based on the total weight of the black photosensitive resin composition. This content range takes into account the photopolymerization rate of the photopolymerizable compound and the physical properties of the final obtained coating film, and if it is less than the above range, the overall polymerization time may be low due to the low polymerization rate. Since the physical property of a coating film may fall rather, it needs to use suitably within the said range.

In addition, a photopolymerization initiation aid may be used together with the photopolymerization initiator. When the photopolymerization initiation aid is used together with the photopolymerization initiator, the photosensitive resin composition is more sensitive, and thus productivity is preferable. As the photopolymerization initiation aid, one or more compounds selected from the group consisting of amines and carboxylic acid compounds may be preferably used.

Such photopolymerization initiation adjuvant is preferably used in the range of usually 10 mol or less, preferably 0.01 to 5 mol per mol of the photopolymerization initiator. When using a photopolymerization start adjuvant within the said range, it can anticipate the effect of improving productivity by increasing a polymerization efficiency.

(E) solvent

As long as the solvent is effective in dissolving other components included in the black photosensitive resin composition and does not react, the solvent may be used without particular limitation on the solvent used in the usual black photosensitive resin composition.

Specific examples of the solvent include ethylene glycol monoalkyl ethers such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, and ethylene glycol monobutyl ether; Diethylene glycol dialkyl ethers such as diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol dipropyl ether and diethylene glycol dibutyl ether; Ethylene glycol alkyl ether acetates such as methyl cellosolve acetate and ethyl cellosolve acetate; Alkylene glycol alkyl ether acetates such as propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, propylene glycol monopropyl ether acetate, methoxybutyl acetate and methoxypentyl acetate; Aromatic hydrocarbons such as benzene, toluene, xylene and mesitylene; Ketones such as methyl ethyl ketone, acetone, methyl amyl ketone, methyl isobutyl ketone and cyclohexanone; Alcohols such as ethanol, propanol, butanol, hexanol, cyclohexanol, ethylene glycol and glycerin; Esters such as ethyl 3-ethoxypropionate and methyl 3-methoxypropionate; And cyclic esters such as γ-butyrolactone.

Among the solvents, organic solvents having a boiling point of 100 ° C. to 200 ° C. can be preferably used in terms of coating properties and drying properties, and more preferably alkylene glycol alkyl ether acetates, ketones, and 3-ethoxy. Ester, such as ethyl propionate and 3-methoxy methyl propionate, can be used, More preferably, propylene glycol monomethyl ether acetate, a propylene glycol monoethyl ether acetate, cyclohexanone, 3-ethoxy propionate, 3- Methyl methoxy propionate etc. can be used. These solvents can be used individually or in mixture of 2 or more types, respectively.

The solvent may be included in the 60 to 90% by weight, preferably 70 to 85% by weight relative to the total weight of the black photosensitive resin composition. When a solvent is contained in the said range, when apply | coating with coating apparatuses, such as a roll coater, a spin coater, a slit and spin coater, a slit coater (sometimes called a die coater), and an inkjet, it is preferable that applicability | paintability tends to be favorable. Do.

(F) additive

The black photosensitive resin composition of the present invention may further include other additives in accordance with the needs of those skilled in the art in a range that does not impair the object of the present invention in addition to the above components.

The adhesion promoter may be added to increase adhesion to the substrate, and may include a silane coupling agent having a reactive substituent selected from the group consisting of carboxyl group, methacryloyl group, isocyanate group, epoxy group, and combinations thereof. It is not limited to this. For example, the silane coupling agent is trimethoxysilyl benzoic acid, γ-methacryl oxypropyl trimethoxy silane, vinyltriacetoxysilane, vinyl trimethoxysilane, γ-isocyanate propyl triethoxysilane, γ-glycidoxy Propyl trimethoxysilane, β- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, etc. can be mentioned, These can be used individually and in combination of 2 or more types.

The surfactant may be used to further improve the coating properties of the photosensitive resin composition, BM-1000, BM-1100 (BM Chemie Co., Ltd., Prolide FC-135 / FC-170C / FC-430 (Sumitomo 3M Co., Ltd.)) Fluorine-based surfactants such as SH-28PA / -190 / SZ-6032 (Dore Silicone Co., Ltd.) may be used, but are not limited thereto. The surfactant may be used as a pigment dispersant, in which case a polyester-based surfactant may be used.

The additive may be included in 0.05 to 10% by weight, preferably 0.1 to 5% by weight based on the total weight of solids in the black photosensitive resin composition.

In addition, the present invention provides a pixel definition film manufactured by using the black photosensitive resin composition. In one embodiment of the present invention, the black photosensitive resin composition may be for forming a pixel definition film of an organic light emitting device, or the black photosensitive resin composition may be for a black bank or a light shielding film. In short, in the present invention, the "pixel defining layer" may be mixed with the "black bank" or the "light shielding layer".

In general, when driving the organic light emitting device, in particular, the scattering phenomenon caused by light in the mobile used outdoors reduces visibility. If a separate black matrix is introduced to absorb the scattered light, visibility in the open air may be improved, but a process for introducing a black matrix should be added, which increases the complexity of the process and increases the cost and time. Can be degraded.

The pixel definition layer manufactured using the black photosensitive resin composition according to the present invention may perform not only the black bank role of the organic light emitting diode but also the black matrix, so that light scattering phenomenon of the organic light emitting diode is not added. There is an advantage to improve the visibility.

The present invention also provides an organic light emitting device including the pixel definition layer, and provides a display device including the organic light emitting device.

Hereinafter, the present invention will be described in more detail with reference to Examples. However, the following examples are intended to illustrate the present invention more specifically, but the scope of the present invention is not limited by the following examples. The following examples may be appropriately modified and changed by those skilled in the art within the scope of the present invention. In the following Examples and Comparative Examples, "%" and "parts" indicating contents are by weight unless otherwise specified.

Synthesis Example 1 Synthesis of Alkali-Soluble Resin

In a four-necked flask, 235 g (epoxy equivalent 235) of bisphenol fluorene type epoxy monomer represented by the following formula (3), 110 mg of tetramethylammonium chloride, 100 mg of 2,6-di-tertbutyl-4-methylphenol, and 72.0 g of acrylic acid Was dissolved by heating from 90 ° C. to 100 ° C. while blowing air at a rate of 25 ml / min.

[Formula 3]

The solution was then slowly warmed up to 120 ° C. in a cloudy condition and completely dissolved. At this time, stirring was continued while confirming that the solution gradually became transparent. The stirring was continued for about 12 hours until the acid value was less than 1.0 mgK0H / g, and then cooled to room temperature to obtain a bisphenol fluorene type epoxy acrylate represented by the following formula (4) which was a colorless, transparent and solid phase.

[Formula 4]

Thereafter, 600 g of propylene glycol monoethyl ether acetate (PGMEA) was added and dissolved in 307.0 g of bisphenol fluorene type epoxy acrylate represented by the above formula (4), and 80.5 g of benzophenone tetracarboxylic dianhydride and tetraethylammonium bromide 1g was mixed and reacted at 110 to 115 degreeC for 4 hours. After confirming the disappearance of the acid anhydride group, 38.0 g of 1,2,3,6-tetrahydrophthalic anhydride was mixed and reacted at 90 ° C for 6 hours to obtain an alkali-soluble resin of the present invention. At this time, the disappearance of the acid anhydride group was confirmed by the IR spectrum and the prepared alkali-soluble resin was confirmed to have a weight average molecular weight of 3,300g / mol and an acid value of 123mgKOH / g.

Examples 1-7 and Comparative Examples 1-6

The black photosensitive resin compositions of Examples 1 to 7 and Comparative Examples 1 to 6 were prepared using the compositions and contents shown in Table 1 below.

TABLE 1

(Unit: weight%)

Carbon black: # 70 (Asahika Head Office)

Lactam Black: 100cf (Basf)

Black 1: C.I. Pigment Black 1

Black 32: C.I. Pigment Black 32

Blue 15: 6: C.I. Pigment Blue 15: 6

Blue 60: C.I. Pigment blue 60

V 29: C.I. Pigment Violet 29

Alkali-soluble resin: Alkali-soluble resin of Synthesis Example 1

Photopolymerizable compound: dipentaerythritol hexaacrylate (Kayarad DPHA: Nippon Kayaku Co., Ltd.)

Photopolymerization initiator: Irgacure OXE03 (Basf)

Dispersant: DISPERBYK-110 (BYK company)

Solvent: Propylene Glycol Monomethyl Ether Acetate (PGMEA)

Experimental Example

1. Pixel Definition Film Manufacturing

The glass substrate of 5 cm 5 cm (Corning) was washed with a neutral detergent and water and dried. Each of the black photosensitive resin compositions according to Examples and Comparative Examples was spin-coated on the glass substrate to have a final film thickness of 1.5 μm, prebaked at 100 ° C., and dried for 2 minutes to remove a solvent. Thereafter, the substrate was exposed at an exposure dose of 100 mJ / cm ² to form a ¹ cm Х ³ cm pattern, and the non-exposed part was removed using an aqueous alkali solution. Subsequently, post-firing was carried out at 230 ° C. for 20 minutes to prepare a pixel definition film.

2. Outgas Characteristic Evaluation

In the outgas characteristic evaluation, instead of capturing the outgas during the deposition process, a simulation experiment was performed using the same heating conditions as those in the pixel definition layer manufacturing process.

Outgas was measured by pyrolysis at 230 ° C. for 30 minutes through Py-GC / MS to analyze the entrapped compound. The result was calculated as a relative percentage based on the value of Comparative Example 1 (100%). All of the outgas measurement samples were uniformly coated with a 2.0 μm coating film, and the patterns obtained through exposure, development, and heat drying at 220 ° C./20 min were used for analysis, and the results are shown in Table 2 below.

3. Pattern Formability Evaluation

Each coating film produced using Examples 1 to 7 and Comparative Examples 1 to 6 was irradiated with light having a wavelength of 365 nm at 50 mJ / cm ² using a pattern mask. After developing for 1 minute at 25 DEG C with an aqueous solution diluted with 1 wt% of potassium hydroxide, it was washed with pure water for 10 seconds. After the pattern obtained in this manner was cured by heating in an oven at 230 ° C. for 30 minutes, the shape of the pattern was visually observed using an optical microscope, and the results are shown in Table 2 below.

<Evaluation Criteria>

○: good formability of 50 μm pattern

Δ: poor formability of 50 μm pattern

Х: 50 μm pattern not formed

TABLE 2

From the results in Table 2 above, C.I. Pigment Black 1, C.I. Pigment Black 32, C.I. Pigment Blue 15: 6 and C.I. In Examples 1 to 7, including two or more selected from the group consisting of Pigment Blue 60, it can be seen that the outgas characteristics of 48.4 to 63.8 are exhibited, and that excellent pattern formation properties are exhibited.

On the other hand, C.I. Pigment Black 1, C.I. Pigment Black 32, C.I. Pigment Blue 15: 6 and C.I. In the case of Comparative Examples 1 to 6 that do not include Pigment Blue 60 or include any one of them, it can be confirmed that the outgas characteristics and the pattern forming effect are inferior.

In addition, in Examples 2 to 7 further comprising a purple pigment as an additional colorant, it can be seen that it shows more excellent outgas characteristics and pattern formability as compared to Example 1 not containing a purple pigment.

Claims (9)

As a black photosensitive resin composition containing (A) a coloring agent, (B) alkali-soluble resin, (C) photopolymerizable compound, (D) photoinitiator, and (E) solvent,
The (A) colorant is carbon black; Lactam black; And two or more selected from the group consisting of CI Pigment Black 1, CI Pigment Black 32, CI Pigment Blue 15: 6, and CI Pigment Blue 60. The method according to claim 1, wherein the C.I. Pigment Black 1, C.I. Pigment Black 32, C.I. Pigment Blue 15: 6 and C.I. Pigment Blue 60 The black photosensitive resin composition, characterized in that at least two selected from the group consisting of 30% by weight or more based on the total weight of the colorant (A). The black photosensitive resin composition of claim 1, wherein the black photosensitive resin composition further comprises a purple pigment. The black photosensitive resin composition according to claim 1, wherein the alkali-soluble resin (B) comprises a copolymer represented by the following general formula (1).
[Formula 1]

(In Formula 1, X is a group represented by the formula (2),
Y is maleic anhydride, succinic anhydride, itaconic anhydride, phthalic anhydride, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, methyl end methylenetetrahydrophthalic anhydride, chloric anhydride, methyltetrahydro phthalic anhydride and glutaric anhydride It is a residue except carboxylic anhydride group (-CO-O-CO-) from the dicarboxylic acid anhydride comprised,
Z is a residue except two carboxylic anhydride groups from tetracarboxylic dianhydride composed of pyromellitic anhydride, benzophenonetetracarboxylic dianhydride, biphenyltetracarboxylic dianhydride and biphenylethertetracarboxylic dianhydride.
n is an integer of 5 to 15.)
[Formula 2]

(In Formula 2, * represents a bond to a carbon atom.) The method according to claim 1, comprising (A) 10 to 50% by weight of the colorant, (B) 2 to 20% by weight of the alkali-soluble resin, (C) 1 to 15% by weight relative to the total weight of the black photosensitive resin composition , (D) 0.01 to 10% by weight of the photopolymerization initiator and 60 to 90% by weight of the solvent (E). The black photosensitive resin composition comprising: The black photosensitive resin composition of claim 1, wherein the black photosensitive resin composition further comprises at least one additive selected from the group consisting of adhesion promoters, surfactants, antioxidants, ultraviolet absorbers, and anti-agglomerating agents. The pixel definition film manufactured using the black photosensitive resin composition of any one of Claims 1-6. An organic light emitting device comprising the pixel definition layer of claim 7. A display device comprising the organic light emitting device of claim 8.