KR20230086574A - Quantum dot composition, display apparatus and manufacturing method of the same - Google Patents

Abstract

A quantum dot composition according to an embodiment of the present invention includes a quantum dot, a first compound including a first functional group, and a solvent, and the first functional group includes at least one of an acetal group and a ketal group.

Description

Quantum dot composition, display device and manufacturing method thereof

The present invention relates to a quantum dot composition, a display device, and a method for manufacturing the same, and relates to a display device with improved luminous efficiency and reliability, and a method for manufacturing the same.

The display panel includes a transmission type display panel that selectively transmits source light generated from a light source and an emission type display panel that generates source light from the display panel itself. The display panel may include different types of color control layers according to pixels to generate a color image. The color control layer may transmit only a partial wavelength range of the source light or change the color of the source light. Some of the color control layers may change the characteristics of the light without changing the color of the source light.

An object of the present invention is to provide a quantum dot composition that can exhibit improved luminous efficiency characteristics and reliability by being used in a light control layer of a display device.

An object of the present invention is to provide a display device having improved light emitting efficiency and reliability.

An object of the present invention is to provide a manufacturing method of a display device having improved light emitting efficiency and reliability.

A quantum dot composition according to an embodiment of the present invention includes a quantum dot, a first compound including a first functional group, and a solvent, and the first functional group includes at least one of an acetal group and a ketal group.

The content of the first compound may be 30 wt% or less based on 100 wt% of the total content of the quantum dot composition.

The first compound may be represented by Formula 1 below.

[Formula 1]

In Formula 1, R ₁ and R ₂ are each independently a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or R ₁ and R ₂ are bonded to each other to form a ring, and R ₃ and R ₄ are each Independently, a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, and a substituted or unsubstituted alky group having 2 to 20 carbon atoms. It may be a yl group, a substituted or unsubstituted aryl group having 6 or more and 30 or less ring carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 or more and 30 or less ring carbon atoms.

The first compound may be represented by any one of Chemical Formulas 1-1 to 1-3.

[Formula 1-1]

[Formula 1-2]

[Formula 1-3]

In Formulas 1-1 to 1-3, R ₅ and R ₆ are each independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted carboxy group, a substituted or unsubstituted thio group, a substituted or unsubstituted amine group, a substituted or unsubstituted phosphine group, a hydroxyl group, a substituted or unsubstituted oxy group, a nitro group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, and a substituted or unsubstituted alkyl group having 2 to 20 carbon atoms An alkenyl group, a substituted or unsubstituted aryl group having 6 or more and 30 or less ring carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 or more and 30 or less ring carbon atoms, or bonded to an adjacent group to form a ring, R ₇ to R ₉ are each independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms for forming a ring, or a substituted or It is an unsubstituted heteroaryl group having 2 or more and 30 or less ring carbon atoms, and n1 and n2 are each independently an integer of 0 or more and 5 or less.

In Chemical Formulas 1-1 to 1-3, the same description as defined in Chemical Formula 1 may be applied to R ₁ to R ₃ .

The first compound may further include a second functional group bonded to the surface of the quantum dot and different from the first functional group.

The second functional group may include at least one of a carboxy group, a thio group, an amine group, a phosphine group, and a hydroxy group.

The first compound may be represented by any one of Chemical Formulas 2-1 to 2-5.

[Formula 2-1]

[Formula 2-2]

[Formula 2-3]

[Formula 2-4]

[Formula 2-5]

In Formulas 2-1 to 2-5, R ₁ and R ₂ are each independently a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or R ₁ and R ₂ are bonded to each other to form a ring; R ₃ is a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms for ring formation, or a substituted or unsubstituted carbon atom for ring formation 2 or more and 30 or less heteroaryl groups, Y is a substituted or unsubstituted carboxy group, a substituted or unsubstituted thio group, a substituted or unsubstituted amine group, a substituted or unsubstituted phosphine group, or a hydroxy group, A ₁ is a substituted or unsubstituted arylene group having 6 or more and 30 or less ring carbon atoms, or a substituted or unsubstituted hetero arylene group having 2 or more and 30 or less ring carbon atoms, and n3 to n7 are each independently 0 or more and 20 or less is an integer

The first compound may further include a third functional group different from the first functional group, and the third functional group may include a (meth)acrylate group.

The boiling point of the first compound may be 180 °C or higher.

The quantum dots may include a core and a shell surrounding the core.

A display device according to an exemplary embodiment of the present invention includes a light emitting device that outputs source light, and a light control layer disposed on the light emitting device and including a plurality of light control units, wherein at least one of the plurality of light control units is provided. includes a quantum dot and an additive, wherein the additive includes a first functional group or a group formed by hydrolysis of the first functional group, and the first functional group includes at least one of an acetal group and a ketal group.

The additive may be represented by Formula 1 or Formula 1A below.

[Formula 1]

[Formula 1A]

In Formula 1 and Formula 1A, R ₁ and R ₂ are each independently a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or R ₁ and R ₂ are bonded to each other to form a ring, and R ₃ and R ₄ is each independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, and a substituted or unsubstituted 2 to 20 carbon atoms It may be an alkynyl group below, a substituted or unsubstituted aryl group having 6 or more and 30 or less ring carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 or more and 30 or less ring carbon atoms.

The additive may be represented by any one of Chemical Formulas 1-1 to 1-6.

[Formula 1-1]

[Formula 1-2]

[Formula 1-3]

[Formula 1-4]

[Formula 1-5]

[Formula 1-6]

In Formulas 1-1 to 1-6, R ₁ and R ₂ are each independently a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or R ₁ and R ₂ are bonded to each other to form a ring; R ₃ and R ₄ are each independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms for forming a ring, or a substituted or An unsubstituted heteroaryl group having 2 to 30 ring carbon atoms, R ₅ and R ₆ are each independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted carboxy group, a substituted or unsubstituted thio group, A substituted or unsubstituted amine group, a substituted or unsubstituted phosphine group, a hydroxy group, a substituted or unsubstituted oxy group, a nitro group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted carbon number An alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms for ring formation, or a substituted or unsubstituted heteroaryl group with 2 to 30 carbon atoms for ring formation, or bonded to an adjacent group to form a ring And R ₇ to R ₉ are each independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, and a substituted or unsubstituted aryl group having 6 to 30 carbon atoms for ring formation. , or a substituted or unsubstituted heteroaryl group having 2 or more and 30 or less ring carbon atoms, and n1 and n2 are each independently an integer of 0 or more and 5 or less.

The additive is bonded to the surface of the quantum dot and further includes a second functional group different from the first functional group, wherein the second functional group includes at least one of a carboxy group, a thio group, an amine group, a phosphine group, and a hydroxy group. can do.

The additive may be represented by any one of Chemical Formulas 2-1 to 2-10.

[Formula 2-1]

[Formula 2-2]

[Formula 2-3]

[Formula 2-4]

[Formula 2-5]

[Formula 2-6]

[Formula 2-7]

[Formula 2-8]

[Formula 2-9]

[Formula 2-10]

In Chemical Formulas 2-1 to 2-10, R ₁ and R ₂ are each independently a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or R ₁ and R ₂ are bonded to each other to form a ring; R ₃ is a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms for ring formation, or a substituted or unsubstituted carbon atom for ring formation 2 or more and 30 or less heteroaryl groups, Y is a substituted or unsubstituted carboxy group, a substituted or unsubstituted thio group, a substituted or unsubstituted amine group, a substituted or unsubstituted phosphine group, or a hydroxy group, A ₁ is a substituted or unsubstituted arylene group having 6 or more and 30 or less ring carbon atoms, or a substituted or unsubstituted hetero arylene group having 2 or more and 30 or less ring carbon atoms, and n3 to n7 are each independently 0 or more and 20 or less is an integer

The additive may further include a third functional group different from the first functional group, and the third functional group may include a (meth)acrylate group.

The source light is light of a first wavelength, and the light control layer is a first light control unit that converts the source light into light of a second wavelength different from the first wavelength, and converts the source light into light of the first wavelength and the first wavelength. It may include a second light control unit that converts light of a third wavelength different from the two wavelengths, and a third light control unit that transmits the source light.

A method of manufacturing a display device according to an embodiment of the present invention includes preparing a display panel and forming a light control layer including a plurality of light control units on the display panel, wherein the plurality of light control units is provided. Forming at least one of the light control units may include forming a preliminary light control unit by providing a quantum dot composition including quantum dots and a first compound including a first functional group, and maintaining the preliminary light control unit at a first temperature. Drying or heat treatment is included, and the first functional group includes at least one of an acetal group and a ketal group.

The first temperature may be lower than the boiling point of the first compound.

According to an embodiment of the present invention, oxidation and corrosion of the quantum dots are prevented by the quantum dots included in at least one of the plurality of light control units and the first compound including at least one of an acetal group and a ketal group, thereby preventing the luminous efficiency of the display device. and reliability can be improved.

According to an embodiment of the present invention, reliability can be improved by protecting the quantum dots from moisture in the process of forming at least one of the plurality of light control units, and oxidation and corrosion of the quantum dots can be prevented during driving, thereby improving excellent luminous efficiency and improvement. A manufacturing method of a display device exhibiting a long lifespan characteristic may be provided.

1A is a perspective view of a display device according to an exemplary embodiment of the present invention.
1B is a plan view of a display device according to an exemplary embodiment of the present invention.
2A is a plan view of a display device according to an exemplary embodiment of the present invention.
2B is a cross-sectional view of a display device according to an exemplary embodiment.
3A to 3C are cross-sectional views of enlarged portions of a display device according to an exemplary embodiment of the present invention.
Figure 4a is a view showing a portion of the quantum dot composition of one embodiment of the present invention in more detail.
Figure 4b schematically shows the quantum dots included in the quantum dot composition according to an embodiment of the present invention.
5 is a cross-sectional view showing a part of a light control member according to an embodiment of the present invention.
6A is a cross-sectional view showing a part of a light control member according to another embodiment of the present invention.
6B schematically illustrates quantum dots and additives included in a light control member according to an embodiment of the present invention.
7A is a flowchart illustrating a method of manufacturing a display device according to an exemplary embodiment of the present invention.
7B is a flow chart in which steps of forming a light control layer according to an embodiment of the present invention are subdivided.
8A to 8C are cross-sectional views illustrating some steps of a manufacturing method of a display device according to an exemplary embodiment of the present invention.
FIG. 9 is a view showing the measured light conversion rate over time of display devices according to Examples and Comparative Examples.
10 is a diagram illustrating process maintenance rate evaluation results of display devices according to Examples and Comparative Examples.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In this specification, when an element (or region, layer, section, etc.) is referred to as being “on,” “connected to,” or “coupled to” another element, it is directly connected/connected to the other element. It means that they can be combined or a third component can be placed between them.

Like reference numerals designate like components. Also, in the drawings, the thickness, ratio, and dimensions of components are exaggerated for effective description of technical content. “And/or” includes any combination of one or more that the associated elements may define.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. These terms are only used for the purpose of distinguishing one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element, without departing from the scope of the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

In addition, terms such as "below", "lower side", "above", and "upper side" are used to describe the relationship between components shown in the drawings. The above terms are relative concepts and will be described based on the directions shown in the drawings.

Terms such as "include" or "have" are intended to indicate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but that one or more other features, numbers, or steps are present. However, it should be understood that it does not preclude the possibility of existence or addition of operations, components, parts, or combinations thereof.

In this specification, "directly disposed" may mean that there is no added layer, film, region, plate, etc. between a portion of the layer, film, region, plate, etc., and another portion. For example, "directly disposed" may mean disposing without using an additional member such as an adhesive member between two layers or two members.

Unless defined otherwise, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In addition, terms such as terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined herein, interpreted as too idealistic or too formal. It shouldn't be.

Hereinafter, a quantum dot composition according to an embodiment of the present invention, a display device formed therefrom, and a manufacturing method of the display device will be described with reference to the drawings.

1A is a perspective view illustrating a display device according to an exemplary embodiment. 1B is a plan view illustrating a display device according to an exemplary embodiment.

The display device DD according to an embodiment may be a device that is activated according to an electrical signal. For example, the display device DD may be a mobile phone, a tablet, a car navigation system, a game machine, or a wearable device, but the embodiment is not limited thereto.

Meanwhile, in FIG. 1A and the following drawings, at least one of the first to fourth directions DR1 to DR4 is illustrated, and the first to fourth directions DR1 , DR2 , DR3 , and DR4 described herein This indicated direction is a relative concept and can be converted to other directions.

In this specification, the thickness direction of the display device DD may be parallel to the third direction DR3 , which is a normal direction to a plane defined by the first and second directions DR1 and DR2 . In this specification, the front (or upper surface) and the rear surface (or lower surface) of the members constituting the display device DD may be defined based on the third direction DR3 .

The display device DD according to an exemplary embodiment may include a display area DA and a non-display area NDA adjacent to the display area DA. The display area DA corresponds to a portion where an image is displayed. A plurality of emission areas PXA and a non-emission area NPXA may be defined in the display area DA. The plurality of light emitting regions PXA may include first to third light emitting regions PXA-R, PXA-G, and PXA-B emitting light of different wavelength ranges. The non-emission area NPXA sets boundaries of the first to third light-emission areas PXA-R, PXA-G, and PXA-B. A structure for preventing color mixing between the first to third light emitting areas PXA-R, PXA-G, and PXA-B, for example, a barrier rib (BK, see FIG. 3 ), etc. is provided in the non-emission area NPXA. can be placed.

Referring to FIGS. 1A and 1B together, in the display device DD according to an exemplary embodiment, the plurality of light emitting areas PXA include three light emitting areas PXA-R and PXA-G emitting red light, green light, and blue light. , PXA-B). For example, the display device DD according to an exemplary embodiment may include a first light emitting area PXA-R, a second light emitting area PXA-G, and a third light emitting area PXA-B that are distinguished from each other. there is.

The light emitting regions PXA-R, PXA-G, and PXA-B of the display device DD according to an exemplary embodiment may be arranged in a stripe shape. Referring to FIG. 1B , each of the plurality of first light emitting regions PXA-R, the plurality of second light emitting regions PXA-G, and the plurality of third light emitting regions PXA-B is in the second direction. It may be aligned along (DR2). In addition, the first light emitting area PXA-R, the second light emitting area PXA-G, and the third light emitting area PXA-B may be repeatedly arranged in the order along the first direction DR1.

Although the areas of the light emitting regions PXA-R, PXA-G, and PXA-B are all shown to be similar in FIG. 1B, the embodiment is not limited thereto, and the light emitting regions PXA-R, PXA-G, and PXA-B The area of may be different from each other according to the wavelength region of the emitted light. Meanwhile, the area of the light emitting regions PXA-R, PXA-G, and PXA-B may refer to an area when viewed on a plane defined by the first and second directions DR1 and DR2.

Meanwhile, the arrangement of the light emitting regions PXA-R, PXA-G, and PXA-B is not limited to that shown in FIG. 1B, and the first light emitting region PXA-R and the second light emitting region PXA-G ), and the order in which the third light emitting regions PXA-B are arranged may be provided in various combinations according to characteristics of display quality required of the display device DD. For example, the arrangement of the light emitting regions PXA-R, PXA-G, and PXA-B may be a PENTILE™ arrangement or a Diamond Pixel™ arrangement.

Also, the light emitting regions PXA-R, PXA-G, and PXA-B may have different areas. For example, in one embodiment, the area of the second light emitting region PXA-G may be smaller than the area of the third light emitting region PXA-B, but the embodiment is not limited thereto.

Referring to FIGS. 1A and 1B together, in an exemplary embodiment, the display area DA may have a rectangular shape. The non-display area NDA may surround the display area DA. However, it is not limited thereto, and the shape of the display area DA and the shape of the non-display area NDA can be designed relatively. Alternatively, the non-display area NDA may be omitted.

The display device DD according to an exemplary embodiment includes a display panel DP including a display element layer DP-ED (see FIG. 3A) and a light control member CCM including a light control layer CCL (see FIG. 3A). include

The display panel DP may be a subminiature light emitting device display panel DP including a subminiature light emitting device. For example, the display panel DP includes a light emitting element, and the light emitting element may be a nano LED or a micro LED. However, it is not limited thereto, and the display panel DP included in the display device DD according to an exemplary embodiment may be an organic electroluminescence display panel or a quantum dot display panel.

2A is a top plan view of a portion of a display device according to an exemplary embodiment. 2B is a cross-sectional view of a display device according to an exemplary embodiment. For easy description, FIG. 2B illustrates a portion including a light emitting area PXA corresponding to one pixel, and some components are omitted. FIG. 2B may be a cross-sectional view of a portion corresponding to line II-II' of FIG. 2A.

Referring to FIGS. 2A and 2B , a display device DD according to an exemplary embodiment may include a display panel DP and a light control member CCM disposed on the display panel DP. The display panel DP includes a base substrate BS, a circuit layer DP-CL disposed on the base substrate BS, and a display element layer DP-ED disposed on the circuit layer DP-CL. it may be

In the display panel DP, the base substrate BS may be a member providing a base surface on which the display element layer DP-ED is disposed. The base substrate BS may be a plastic substrate, an insulating film, or a multilayer structure including a plurality of insulating layers. The base substrate BS may have a multilayer structure. For example, the base substrate BS may have a three-layer structure of a polymer resin layer, a barrier layer, and a polymer resin layer. In particular, the polymer resin layer may include a polyimide-based resin. In addition, the base substrate BS may be a support layer formed of polyimide as a single layer.

The circuit layer DP-CL may be disposed on the base substrate BS. The circuit layer DP-CL may include an insulating layer, a semiconductor pattern, a conductive pattern, and a signal line. An insulating layer, a semiconductor layer, and a conductive layer are formed on the base substrate BS by a method such as coating or deposition, and thereafter, the insulating layer, the semiconductor layer, and the conductive layer are selectively patterned through a plurality of photolithography processes. ) can be After that, semiconductor patterns, conductive patterns, and signal lines included in the circuit layer DP-CL may be formed.

The circuit layer DP-CL may include a thin film transistor disposed on the base substrate BS and a plurality of insulating layers. In addition, it may include a plurality of connection electrode parts formed to pass through the plurality of insulating layers.

A buffer layer BFL may be disposed on the base substrate BS. The first thin film transistor TR1 and the second thin film transistor TR2 may be disposed on the buffer layer BFL. The first thin film transistor TR1 may include a first control electrode CE1 and a first semiconductor pattern SP1. The second thin film transistor TR2 may include a second control electrode CE2 , a first lower connection electrode LCNE1 , and a second semiconductor pattern SP2 .

The first semiconductor pattern SP1 and the second semiconductor pattern SP2 may be disposed on the buffer layer BFL. The buffer layer BFL may provide modified surfaces to the first and second semiconductor patterns SP1 and SP2. In this case, the first and second semiconductor patterns SP1 and SP2 may have higher adhesion to the buffer layer BFL than when they are directly formed on the first base layer BL1. Alternatively, the buffer layer BFL may be a barrier layer protecting lower surfaces of each of the first semiconductor pattern SP1 and the second semiconductor pattern SP2. In this case, in the buffer layer BFL, the first base layer BL1 itself or contamination or moisture introduced through the first base layer BL1 penetrates into the first semiconductor pattern SP1 and the second semiconductor pattern SP2. can block it from happening.

The first insulating layer L1 is disposed on the buffer layer BFL and may cover the first semiconductor pattern SP1 and the second semiconductor pattern SP2. The first insulating layer L1 may include an inorganic material and may have a single-layer or multi-layer structure. The first insulating layer L1 may include at least one of aluminum oxide, titanium oxide, silicon oxide, silicon nitride, silicon oxynitride, zirconium oxide, and hafnium oxide. The first control electrode CE1 and the second control electrode CE2 may be disposed on the first insulating layer L1. The second insulating layer L2 is disposed on the first insulating layer L1 and may cover the first control electrode CE1 and the second control electrode CE2. The second insulating layer L2 may include an inorganic material.

The capacitor (not shown) may include a first cap electrode (not shown) and a second cap electrode CPa. For example, the first cap electrode may be branched from the second control electrode CE2, and the second cap electrode CPa may be disposed on the second insulating layer L2.

The third insulating layer L3 is disposed on the second insulating layer L2 and may cover the second cap electrode CPa. A first lower connection electrode LCNE1 connected to the second semiconductor pattern SP2 may be disposed on the third insulating layer L3. Meanwhile, each of the first thin film transistor TR1 and the second thin film transistor TR2 is disposed on the third insulating layer L3 and through-holes passing through the first to third insulating layers L1, L2, and L3. An input electrode and an output electrode connected to each of the first semiconductor pattern SP1 and the second semiconductor pattern SP2 may be further included. At least a portion of each of signal wires, eg, scan lines or data lines, may be disposed on the third insulating layer L3.

The fourth insulating layer L4 is disposed on the third insulating layer L3 and may cover the first lower connection electrode LCNE1. The fourth insulating layer L4 may include an inorganic material and/or an organic material, and may have a single-layer or multi-layer structure. A second lower connection electrode LCNE2 may be disposed on the fourth insulating layer L4 . On the fourth insulating layer L4, not only the second lower connection electrode LCNE2, but also at least other portions of signal wires, eg, scan lines or data lines, may be disposed. The second lower connection electrode LCNE2 may be connected to the first lower connection electrode LCNE1.

The fifth insulating layer L5 is disposed on the fourth insulating layer L4 and may cover the second lower connection electrode LCNE2. The fifth insulating layer L5 may include an organic material. The fifth insulating layer L5 covers a pixel circuit (not shown) disposed below, and may provide a flat surface to at least a portion thereof. For example, the fifth insulating layer L5 may provide a flat surface in an area other than the area in which the groove HM is defined. However, this is only an example, and the groove HM may not be defined in the fifth insulating layer L5.

The first barrier rib BR1 and the second barrier rib BR2 may be disposed on the fifth insulating layer L5. The first barrier rib BR1 and the second barrier rib BR2 may be spaced apart from each other in the first direction DR1 . Each of the first barrier rib BR1 and the second barrier rib BR2 may include an organic material.

The first electrode E1 may cover the first barrier rib BR1 , and the second electrode E2 may cover the second barrier rib BR2 . That is, a first barrier rib BR1 is disposed between the first electrode E1 and the fifth insulating layer L5, and a second barrier rib BR2 is disposed between the second electrode E2 and the fifth insulating layer L5. can be placed.

A through hole is provided in the fifth insulating layer L5, and the second lower connection electrode LCNE2 may be exposed through the through hole. The first electrode E1 may be electrically connected to the exposed second lower connection electrode LCNE2. Although not shown, the second electrode E2 may be electrically connected to a second power line (not shown). That is, a second power supply voltage (not shown) may be provided to the second electrode E2.

The first electrode E1 may include a first reflective electrode RFE1 and a first capping electrode CPE1 , and the second electrode E2 may include a second reflective electrode RFE2 and a second capping electrode CPE2 . can include

Each of the first reflective electrode RFE1 and the second reflective electrode RFE2 may include a reflective material. Each of the first reflective electrode RFE1 and the second reflective electrode RFE2 may have a single-layer structure or a plurality of stacked structures. For example, each of the first reflective electrode RFE1 and the second reflective electrode RFE2 may have a structure in which indium tin oxide (ITO), silver (Ag), and indium tin oxide (ITO) are sequentially stacked. .

The first capping electrode CPE1 may cap the first reflective electrode RFE1 , and the second capping electrode CPE2 may cap the second reflective electrode RFE2 . For example, each of the first capping electrode CPE1 and the second capping electrode CPE2 is made of indium zinc oxide (IZO), indium tin oxide (ITO), indium gallium oxide (IGO), indium zinc gallium oxide (IGZO), and mixtures/compounds thereof.

On a plane, a groove HM may be provided in one region of the fifth insulating layer L5 between the first electrode E1 and the second electrode E2. When viewed in the third direction DR3 , the groove HM may not overlap the first electrode E1 and the second electrode E2 .

The sixth insulating layer L6 may be disposed on the groove HM. The sixth insulating layer L6 may include an inorganic material. A curved portion GP may be provided in a region of the sixth insulating layer L6 corresponding to the groove HM. For example, the groove HM and the curved portion GP may overlap on a plane. In one embodiment of the present invention, the groove HM may not be provided. In this case, the bent portion GP may not be provided in the sixth insulating layer L6 .

The light emitting device ED may be disposed on the sixth insulating layer L6. The light emitting element ED may be disposed between the first electrode E1 and the second electrode E2. The light emitting element ED may be electrically connected to the first electrode E1 and the second electrode E2. The light emitting device ED may be disposed between the first barrier rib BR1 and the second barrier rib BR2 . For example, the light emitting device ED may be disposed in the groove HM and the curved portion GP.

The light emitting device ED may include an n-type semiconductor layer, a p-type semiconductor layer, and an active layer disposed between the n-type semiconductor layer and the p-type semiconductor layer. The light emitting device ED may have various shapes such as a cylindrical shape or a polygonal column shape. In the light emitting element ED, the n-type semiconductor layer is connected to either the first electrode E1 or the second electrode E2, and the p-type semiconductor layer is connected to either the first electrode E1 or the second electrode E2. can be connected to the other one. The active layer may be formed of at least one of a single quantum well structure, a multiple quantum well structure, a quantum wire structure, and a quantum dot structure. The active layer may be a region in which electrons injected through the n-type semiconductor layer and holes injected through the p-type semiconductor layer are recombinated.

Referring to FIG. 2A , in the display device DD according to an exemplary embodiment, each of the first electrode E1 and the second electrode E2 extends along the second direction DR2, and the first electrode E1 and the second electrode E1 extend along the second direction DR2. The electrodes E2 may be spaced apart from each other in the first direction DR1. Figure 2a is only shown as an example, and the present invention is not limited thereto. The first electrode E1 and the second electrode E2 may be modified into various structures without limitation as long as they are spaced apart from each other. 2A illustrates a structure in which two first electrodes E1 are provided with the second electrode E2 extending in the second direction DR2 interposed therebetween.

On a flat surface, the light emitting element ED may be disposed between the first electrode E1 and the second electrode E2, and the light emitting element ED may not overlap the first electrode E1 and the second electrode E2. can do. A plurality of light emitting devices ED may be provided, and the plurality of light emitting devices may be connected in parallel. The light emitting element ED may be electrically connected to the first electrode E1 through the first connection electrode CNE1 and electrically connected to the second electrode E2 through the second connection electrode CNE2.

Referring back to FIG. 2B , a seventh insulating layer L7 (or an insulating pattern) may be disposed on the light emitting device ED. The seventh insulating layer L7 may cover at least a portion of the upper surface of the light emitting device ED.

The second connection electrode CNE2 may be disposed on the seventh insulating layer L7, the light emitting element ED, the sixth insulating layer L6, and the second electrode E2. The eighth insulating layer L8 may be disposed on the second connection electrode CNE2 and the seventh insulating layer L7. The first connection electrode CNE1 may be disposed on the eighth insulating layer L8, the seventh insulating layer L7, the light emitting element ED, the sixth insulating layer L6, and the first electrode E1. Even if the length of the light emitting element ED is less than several hundred micrometers, the second connection electrode CNE2 and the first connection electrode CNE1 may not directly contact each other due to the eighth insulating layer L8. However, this is only one embodiment of the present invention, and in another embodiment of the present invention, the first connection electrode CNE1 and the second connection electrode CNE2 may be simultaneously formed through the same process.

The first connection electrode CNE1 and the second connection electrode CNE2 may include a conductive material. For example, the conductive material may include at least one of indium zinc oxide (IZO), indium tin oxide (ITO), indium gallium oxide (IGO), indium zinc gallium oxide (IGZO), and mixtures/compounds thereof. can However, the present invention is not limited thereto. For example, the conductive material may be a metal material, and the metal material may include, for example, molybdenum, silver, titanium, copper, aluminum, or an alloy thereof.

The ninth insulating layer L9 may be disposed on the first connection electrode CNE1 and the eighth insulating layer L8. The ninth insulating layer L9 may be an encapsulation layer that seals the light emitting element ED to block moisture and oxygen.

The light control member CCM may include a base layer BL and a light control layer CCL. The light control layer (CCL) may include a light conversion body. The photoconverter may be a quantum dot or a phosphor. The photoconverter may convert the wavelength of the provided light and emit it. That is, the light control layer CCL may be a layer including quantum dots or a layer including phosphors.

The light control layer CCL may include a plurality of light control parts CCP. Also, the light control layer CCL may include light control units spaced apart from each other and a division pattern disposed between the light control units spaced apart from each other. A plurality of light control units CCP may be disposed on the display element layer DP-ED. The plurality of light control units CCP may be directly disposed on the display element layer DP-ED. The plurality of light control units CCP may be directly disposed on the ninth insulating layer L9 of the display element layer DP-ED.

The light control member CCM according to an exemplary embodiment may further include a color filter layer CFL. The color filter layer CFL may be disposed between the base layer BL and the light control layer CCL. The color filter layer CFL may include a light blocking part BM and a filter part CF. A light blocking portion BM may be disposed on one surface of the base layer BL facing the base substrate BS. An opening may be provided in the light blocking portion BM, and the color portion CF may cover the opening. An area exposed by the opening may correspond to the emission area PXA.

In one embodiment, the light control member CCM may include a base layer BL disposed on the color filter layer CFL. The base layer BL may be a member providing a base surface on which the light control layer CCL and the like are disposed. The base layer BL may be a glass substrate, a metal substrate, or a plastic substrate. However, the embodiment is not limited thereto, and the base layer BL may be an inorganic layer, an organic layer, or a composite material layer. Also, unlike the illustration, in one embodiment, the base layer BL may be omitted.

3A is an enlarged cross-sectional view of a portion of a display device according to an exemplary embodiment of the present invention. In FIG. 3A, a portion corresponding to the line II′ of FIG. 1A is shown.

A display device DD according to an exemplary embodiment includes a display panel DP and a light control member CCM disposed on the display panel DP, and the light control member CCM includes a light control layer CCL and A color filter layer (CFL) may be included. The light control member CCM includes a base layer BL, a light control layer CCL disposed under the base layer BL, and a color filter layer CFL disposed between the light control layer CCL and the base layer BL. It may contain. In the light control member CCM, the light control layer CCL may be disposed adjacent to the display panel DP.

Referring to FIG. 3A , the display device DD may include a non-emission area NPXA and emission areas PXA-R, PXA-G, and PXA-B. Each of the light emitting regions PXA-R, PXA-G, and PXA-B may be a region in which light generated by the light emitting element ED included in the display element layer DP-ED ( FIG. 2B ) is emitted. Areas of each of the light emitting regions PXA-R, PXA-G, and PXA-B may be different from each other, and in this case, the area may mean an area when viewed on a plane. Meanwhile, in FIG. 3A , the configuration of the display element layer (DP-ED) is omitted to avoid redundant description. For a detailed structure of the display element layer DP-ED, refer to FIG. 2B.

The light emitting regions PXA-R, PXA-G, and PXA-B may be divided into a plurality of groups according to the color of emitted light. In the display device DD of an exemplary embodiment shown in FIG. 3A , three light emitting regions PXA-R, PXA-G, and PXA-B emitting red light, blue light, and green light are illustrated as an example. For example, the display device DD according to an exemplary embodiment may include a red light emitting area PXA-R, a green light emitting area PXA-G, and a blue light emitting area PXA-B.

In the display device DD of an exemplary embodiment shown in FIG. 3A , the display panel DP emits light of the same wavelength region regardless of the light emitting regions PXA-R, PXA-G, and PXA-B of the display device DD. may be emitting. For example, the display panel DP may provide blue light, which is the first color light, to the light control member CCM.

In the display device DD of an exemplary embodiment shown in FIG. 3A , each of the light emitting regions PXA-R, PXA-G, and PXA-B is illustrated as having the same area, but is not limited thereto, and the light emitting regions ( PXA-R, PXA-G, and PXA-B) may each have various areas. For example, among the light emitting areas PXA-R, PXA-G, and PXA-B, the red light emitting area PXA-R and the green light emitting area PXA-G have the same area, and the blue light emitting area PXA- B) may have an area smaller than those of the red light emitting area PXA-R and the green light emitting area PXA-G. However, the present invention is not limited thereto, and each of the light emitting regions PXA-R, PXA-G, and PXA-B may have various areas according to colors emitted from the light control units CCP1, CCP2, and CCP3. For example, in the display device DD of an exemplary embodiment, the blue light emitting area PXA-B may have the largest area and the green light emitting area PXA-G may have the smallest area. However, the embodiment is not limited thereto, and the light emitting regions PXA-R, PXA-G, and PXA-B emit light of colors other than red light, blue light, and green light, or light emitting regions with different area ratios. (PXA-R, PXA-G, PXA-B) may be provided.

Referring to FIG. 3A , the display panel DP according to an exemplary embodiment includes a base substrate BS, a circuit layer DP-CL disposed on the base substrate BS, and a circuit layer DP-CL disposed on the base substrate BS. and a display element layer DP-ED. The contents described in FIGS. 2A and 2B may be equally applied to the display panel DP included in the display device DD of the exemplary embodiment shown in FIG. 3A .

The light control layer CCL is disposed on the display panel DP. The light control layer CCL may be directly disposed on the display panel DP. The light control layer CCL may be directly disposed on the display element layer DP-ED of the display panel DP. The light control layer CCL and the display element layer DP-ED may be disposed on the same substrate, for example, the base substrate BS. Accordingly, the light control layer CCL and the display panel DP may be formed through a continuous process without a separate bonding process.

The light control layer CCL may include a plurality of barrier ribs BK disposed apart from each other and a plurality of light control units CCP disposed between the barrier ribs BK. The barrier ribs BK may define an opening OH exposing one surface of the color filter layer CFL disposed to overlap the light control layer CCL. The light control units CCP1 , CCP2 , and CCP3 may fill the opening OH. That is, the light control member CCM according to an embodiment is disposed between the base layer BL, the plurality of barrier ribs BK disposed on the base layer BL, and the plurality of barrier ribs BK spaced apart from each other. It may include first to third light control units CCP1 , CCP2 , and CCP3 .

In the display device DD according to an exemplary embodiment, at least one of the plurality of light control units CCP1 , CCP2 , and CCP3 included in the light control layer CCL may be formed from the quantum dot composition according to the exemplary embodiment. For example, among the plurality of light control units CCP1 , CCP2 , and CCP3 included in the light control layer CCL, the first light control unit CCP1 and the second light control unit CCP2 may be formed from the quantum dot composition of an embodiment. there is. However, it is not limited thereto, and all of the plurality of light control units CCP1, CCP2, and CCP3 are formed from the quantum dot composition of one embodiment, or only one of the plurality of light control units CCP1, CCP2, and CCP3 is the quantum dot composition of one embodiment. may have been formed from Details of the quantum dot composition according to an embodiment will be described later.

The light control member CCM according to an embodiment may include a plurality of light control units CCP1 , CCP2 , and CCP3 . The light control unit CCP includes a first light control unit CCP1 that converts the first light into second light, a second light control unit CCP2 that converts the first light into third light, and a light source that transmits the first light. 3 light control unit (CCP3) may be included. The third light may have a longer wavelength region than the first light, and the second light may have a longer wavelength region than the first and third lights. For example, the first light may be blue light, the second light may be red light, and the third light may be green light. The first light may be light in a wavelength range of 410 nm to 480 nm, the second light may be light in a wavelength range of 625 nm to 675 nm, and the third light may be light in a wavelength range of 500 nm to 570 nm. Meanwhile, the first light may be source light provided from the display panel DP to the light control unit CCP.

The third light control unit CCP3 may be a transmission unit that transmits the wavelength of the first light without converting it. A light emitting body may be included in the first light control unit CCP1 and the second light control unit CCP2. The light-emitting body may be a particle that emits light of a different wavelength by converting the wavelength of incident light. In an embodiment, light emitting bodies included in the first light control unit CCP1 and the second light control unit CCP2 may be quantum dots. However, it is not limited thereto, and the light emitting body may also be included in the first light control unit CCP1.

A quantum dot may be a particle that converts a wavelength of provided light. The core of the quantum dot is a group II-VI compound, a group III-VI compound, a group I-III-VI compound, a group III-V compound, a group III- II-V compound, a group IV-VI compound, a group IV element, and a group IV. compounds and combinations thereof.

Group II-VI compounds include binary element compounds selected from the group consisting of CdSe, CdTe, CdS, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS and mixtures thereof; CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS and mixtures thereof ternary chosen from the group bovine compounds; And it may be selected from the group consisting of quaternary compounds selected from the group consisting of HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe, and mixtures thereof.

The group III-VI compound may include a binary compound such as In ₂ S ₃ , In ₂ Se ₃ , etc., a ternary compound such as InGaS ₃ , InGaSe ₃ , or the like, or any combination thereof.

The group I-III-VI compound is a ternary compound selected from the group consisting of AgInS, AgInS ₂ , CuInS, CuInS ₂ , AgGaS ₂ , CuGaS ₂ CuGaO ₂ , AgGaO ₂ , AgAlO ₂ and mixtures thereof, or AgInGaS ₂ , CuInGaS ₂ and the like.

Group III-V compounds are GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb, and binary element compounds selected from the group consisting of mixtures thereof, GaNP, GaNAs, GaNSb, and GaPAs. ternary compounds selected from the group consisting of GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InAlP, InNP, InNAs, InNSb, InPAs, InPSb and mixtures thereof, and GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb , GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb, and quaternary compounds selected from the group consisting of mixtures thereof. Meanwhile, the group III-V compound may further include a group II metal. For example, InZnP and the like may be selected as the III-II-V compound.

Group IV-VI compounds are SnS, SnSe, SnTe, PbS, PbSe, PbTe, and a binary element compound selected from the group consisting of mixtures thereof; a ternary compound selected from the group consisting of SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe, and mixtures thereof; And it may be selected from the group consisting of quaternary compounds selected from the group consisting of SnPbSSe, SnPbSeTe, SnPbSTe, and mixtures thereof. Group IV elements may be selected from the group consisting of Si, Ge, and mixtures thereof. The group IV compound may be a binary element compound selected from the group consisting of SiC, SiGe, and mixtures thereof.

In this case, the two-element compound, the three-element compound, or the quaternary element compound may be present in the particle at a uniform concentration or may be present in the same particle in a state in which the concentration distribution is partially different. Also, one quantum dot may have a core/shell structure surrounding another quantum dot. In the core/shell structure, a concentration gradient in which the concentration of elements present in the shell decreases toward the core may be present.

In some embodiments, the quantum dot may have a core-shell structure including a core including the aforementioned nanocrystal and a shell surrounding the core. The shell of the quantum dots may serve as a protective layer for maintaining semiconductor properties by preventing chemical denaturation of the core and/or as a charging layer for imparting electrophoretic properties to the quantum dots. The shell may be monolayer or multilayer. Examples of the quantum dot shell include metal or non-metal oxides, semiconductor compounds, or combinations thereof.

For example, the metal or nonmetal oxide may be SiO ₂ , Al ₂ O ₃ , TiO ₂ , ZnO, MnO, Mn ₂ O ₃ , Mn ₃ O ₄ , CuO, FeO, Fe ₂ O ₃ , Fe ₃ O ₄ , Two-element compounds such as CoO, Co ₃ O ₄ , and NiO, or three-element compounds such as MgAl ₂ O ₄ , CoFe ₂ O ₄ , NiFe ₂ O ₄ , and CoMn ₂ O ₄ may be exemplified, but the present invention is limited thereto. It is not.

In addition, examples of the semiconductor compound include CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP, AlSb, and the like. However, the present invention is not limited thereto.

Quantum dots may have a full width of half maximum (FWHM) of the emission wavelength spectrum of about 45 nm or less, preferably about 40 nm or less, more preferably about 30 nm or less, and color purity or color reproducibility can be improved within this range. can In addition, since light emitted through the quantum dots is emitted in all directions, a wide viewing angle may be improved.

In addition, the shape of the quantum dots is not particularly limited to those commonly used in the field, but more specifically, spherical, pyramidal, multi-arm, or cubic nanoparticles, nanotubes, Forms such as nanowires, nanofibers, and nanoplate-like particles can be used.

Quantum dots can control the color of light emitted according to the particle size, and accordingly, quantum dots can have various luminous colors such as blue, red, and green. As the particle size of the quantum dots is smaller, light of a shorter wavelength region may be emitted. For example, the particle size of quantum dots emitting green light may be smaller than the particle size of quantum dots emitting red light.

Meanwhile, although not shown, the plurality of light control units CCP1 , CCP2 , and CCP3 may further include an inorganic material. The inorganic materials included in the plurality of light control units CCP1 , CCP2 , and CCP3 may be, for example, scattering particles. The scattering particles may be TiO ₂ or silica-based nanoparticles. The scattering particles may be particles that increase light emission efficiency by scattering light. The scattering particles may be uniformly dispersed within the plurality of light control units CCP1 , CCP2 , and CCP3 .

Referring back to FIG. 3A , the light control member CCM according to an exemplary embodiment may further include a color filter layer CFL. The color filter layer CFL may be disposed between the base layer BL and the light control layer CCL. The color filter layer CFL may include a light blocking part BM and a filter part CF.

The light blocking portion BM may be disposed on the base layer BL. The plurality of light blocking portions BM may be spaced apart from each other while exposing a portion of the base layer BL. Filters CF1 , CF2 , and CF3 may be disposed between the light blocking portions BM.

The filter unit CF may include a plurality of filters CF1, CF2, and CF3. That is, the color filter layer CFL may include a first filter CF1 transmitting second light, a second filter CF2 transmitting third light, and a third filter CF3 transmitting first light. can For example, the first filter CF1 may be a red filter, the second filter CF2 may be a green filter, and the third filter CF3 may be a blue filter.

Each of the filters CF1 , CF2 , and CF3 may include a polymeric photosensitive resin and a pigment or dye. The first filter CF1 may contain a red pigment or dye, the second filter CF2 may contain a green pigment or dye, and the third filter CF3 may contain a blue pigment or dye.

Meanwhile, the embodiment is not limited thereto, and the third filter CF3 may not include a pigment or dye. The third filter CF3 may include a polymeric photoresist and may not contain a pigment or dye. The third filter CF3 may be transparent. The third filter CF3 may be formed of a transparent photosensitive resin.

The light blocking portion BM may be a black matrix. The light blocking portion BM may include an organic light blocking material or an inorganic light blocking material including black pigment or black dye. The light blocking portion BM may prevent light leakage and divide boundaries between adjacent filters CF1 , CF2 , and CF3 .

The plurality of light blocking portions BM may be spaced apart from each other, and each of the light blocking portions BM may overlap each of the plurality of barrier ribs BK.

The color filter layer CFL may further include a low refractive index layer LRL. The low refractive index layer LRL may be disposed between the filter unit CF and the light control layer CCL. The refractive index of the low refractive index layer LRL may be greater than or equal to 1.1 and less than or equal to 1.5. The refractive index value of the low refractive index layer LRL may be adjusted by a ratio of hollow inorganic particles and/or voids included in the low refractive index layer LRL.

The color filter layer CFL may further include a buffer layer BFL. 3A shows that the buffer layer BFL is disposed between the filter unit CF and the low refractive index layer LRL, but the embodiment is not limited thereto. For example, the buffer layer BFL may be disposed adjacent to the light control layer CCL. That is, the buffer layer BFL may be a filling layer filling a space between the low refractive index layer LRL and the light control layer CCL. The buffer layer BFL may be a protective layer protecting the low refractive index layer LRL or the filter part CF. The buffer layer BFL may be an inorganic material layer including at least one inorganic material selected from among silicon nitride, silicon oxide, and silicon oxynitride. The buffer layer BFL may be formed of a single layer or a plurality of layers. However, it is not limited thereto, and some of the buffer layer BFL, the low refractive index layer LRL, the light blocking part BM, and the filter parts CF1 , CF2 , and CF3 included in the color filter layer CFL may be omitted.

The base layer BL may be a member providing a base surface on which a color filter layer CFL or the like is disposed. The base layer BL may be a glass substrate, a metal substrate, or a plastic substrate. However, the embodiment is not limited thereto, and the base layer BL may be an inorganic layer, an organic layer, or a composite material layer.

3B is a cross-sectional view of a display device DD according to an exemplary embodiment of the present invention. Hereinafter, in describing the display device DD according to an embodiment of the present invention with reference to FIG. 3B , the same reference numerals are assigned to the components previously described in FIGS. 2A to 3A and detailed descriptions thereof are omitted.

Referring to FIG. 3B , in the display device DD according to an exemplary embodiment, the light control layer CCL further includes a capping layer CPL, compared to the display device DD shown in FIG. 3A , and A filling layer FML disposed between the member CCM-a and the display panel DP may be further included. However, it is not limited thereto, and one of the capping layer CPL and the filling layer FML may be omitted.

The display device DD according to an exemplary embodiment includes a display panel DP and a light control member CCM-a disposed on the display panel DP, and includes the display panel DP and the light control member CCM-a. A filling layer (FML) disposed therebetween may be included.

The light control member CCM-a may include a light control layer CCL and a color filter layer CFL. The light control member (CCM-a) includes a base layer (BL), a color filter layer (CFL) disposed below the base layer (BL), and a light control layer (CCL) disposed below the color filter layer (CFL). can In the light control member CCM-a, the light control layer CCL may include a capping layer CPL disposed under the plurality of light control parts CCP1, CCP2, and CCP3.

The capping layer CPL may be disposed on the light control part CCP and the barrier rib BK. The capping layer CPL may serve to prevent penetration of moisture and/or oxygen (hereinafter referred to as 'moisture/oxygen'). The capping layer CPL may be disposed on the light control part CCP to block exposure of the light control part CCP to moisture/oxygen. The capping layer CPL may include at least one inorganic layer. That is, the capping layer CPL may include an inorganic material. For example, the capping layer CPL may include silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, titanium oxide, tin oxide, cerium oxide, and silicon oxynitride, or light transmittance. It may be made including a secured metal thin film and the like. Meanwhile, the capping layer CPL may further include an organic layer. The capping layer CPL may be composed of a single layer or a plurality of layers. Meanwhile, in FIG. 3B, the capping layer CPL is disposed below the light control part CCP, that is, only between the filling layer FML and the light control part CCP, but is not limited thereto, and the capping layer ( CPL) may also be disposed between the light control unit CCP and the low refractive index layer LRL.

The filling layer FML may charge between the display panel DP and the light control member CCM. The filling layer FML may be disposed between the display panel DP and the light control layer CCL. That is, the light control layer CCL of the display device DD shown in FIG. 3B is not directly disposed on the display panel DP unlike the light control layer CCL of the display device DD shown in FIG. 3A. , It may be disposed spaced apart from each other with the filling layer (FML) interposed therebetween.

The filling layer FML may function as a buffer between the display panel DP and the light control member CCM. In an exemplary embodiment, the filling layer FML may perform a shock absorbing function and increase strength of the display device DD. The filling layer FML may be formed of a filling resin including a polymer resin. For example, the filling layer FML may be formed of a filling layer resin including an acrylic resin or an epoxy resin.

The filling layer FML has a structure distinct from the capping layer CPL and may be formed in a separate process step. The filling layer FML and the capping layer CPL may be formed of different materials.

As described above with reference to FIG. 3A, in the display device DD of one embodiment shown in FIG. 3B, at least one of the plurality of light control units CCP1, CCP2, and CCP3 included in the light control layer CCL Examples may be formed from quantum dot compositions.

Meanwhile, the contents described in FIGS. 2A and 2B may be equally applied to the display panel DP included in the display device DD of the exemplary embodiment illustrated in FIG. 3B .

3C is a cross-sectional view of a display device DD according to an exemplary embodiment of the present invention. Hereinafter, in describing the display device DD according to an embodiment of the present invention with reference to FIG. 3C , the same reference numerals are assigned to the components previously described in FIGS. 2A to 3B and detailed descriptions thereof are omitted.

Referring to FIG. 3C , the structure of the display device layer DP-ED-1 of the display device DD according to an exemplary embodiment may be different from that of the display device DD illustrated in FIG. 3A. Unlike the display panel DP of the display device DD shown in FIG. 3A , the display panel DP- 1 included in the display device DD of an embodiment shown in FIG. 3C is an organic electroluminescent display panel or a quantum dot display panel. It may be a light emitting display panel. Hereinafter, the display panel DP-1 is illustrated as an organic electroluminescent display panel, but the display panel DP-1 according to an exemplary embodiment may be a quantum dot light emitting display panel, except that quantum dots are used as a light emitting body. The same description as that of the display panel DP- 1 described later may be applied.

The display device DD according to an exemplary embodiment may include a display panel DP- 1 and a light control member CCM-b disposed on the display panel DP- 1 . The description of FIG. 3B may be applied to the light control member CCM-b included in the display device DD according to an exemplary embodiment described with reference to FIG. 3C . For example, the light control member CCM-b of the display device DD of one embodiment shown in FIG. 3C is like the light control member CCM-a of the display device DD of one embodiment shown in FIG. 3B. The light control layer CCL may include a capping layer CPL. Also, the display device DD shown in FIG. 3C includes a filling layer FML disposed between the light control member CCM-b and the display panel DP-1 like the display device DD shown in FIG. 3B. can include

Display panel DP- 1 according to an exemplary embodiment includes a base substrate BS, a circuit layer DP-CL disposed on the base substrate BS, and a display element layer disposed on the circuit layer DP-CL. (DP-ED-1). The display element layer DP-ED-1 includes a pixel defining layer PDL, an organic electroluminescent element OEL disposed between the pixel defining layer PDL, and a thin film encapsulation disposed on the organic electroluminescent element OEL. A layer (TFE) may be included.

The pixel defining layer (PDL) may be formed of a polymer resin. For example, the pixel defining layer PDL may include a polyacrylate-based resin or a polyimide-based resin. In addition, the pixel defining layer (PDL) may be formed by further including an inorganic material in addition to the polymer resin. Meanwhile, the pixel defining layer PDL may include a light absorbing material or may include a black pigment or a black dye. Also, the pixel defining layer PDL may be formed of an inorganic material. For example, the pixel defining layer PDL may include silicon nitride (SiN _x ), silicon oxide (SiO _x ), silicon nitride oxide (SiO _x N _y ), or the like. The pixel defining layer PDL may define the light emitting regions PXA-R, PXA-G, and PXA-B. The light-emitting areas PXA-R, PXA-G, and PXA-B and the non-light-emitting area NPXA may be distinguished by the pixel defining layer PDL.

The pixel defining layer PDL may overlap the barrier rib BK. That is, each of the plurality of pixel defining layers PDL may overlap each of the plurality of barrier ribs BK.

The organic electroluminescent element OEL may include a first electrode EL1 and a second electrode EL2 facing each other, and an organic layer OL disposed between the first electrode EL1 and the second electrode EL2. can The organic layer OL may include a hole transport region, an emission layer, and an electron transport region. The hole transport region includes a hole injection layer adjacent to the first electrode EL1 and a hole transport layer disposed between the hole injection layer and the light emitting layer, and the electron transport region includes the electron injection layer adjacent to the second electrode EL2, the light emitting layer, and the electron injection layer. An electron transport layer disposed between the injection layers may be included.

A thin film encapsulation layer TFE may be disposed on the organic electroluminescent element OEL, and the thin film encapsulation layer TFE may be disposed on the second electrode EL2 . The thin film encapsulation layer TFE may be directly disposed on the second electrode EL2. The thin film encapsulation layer (TFE) may be a single layer or a plurality of layers stacked.

The light control member CCM-b is disposed on the display panel DP. The light control member CCM-b may include a light control layer CCL, a color filter layer CFL, and a base layer BL. For example, the display panel DP includes an organic light emitting device OEL emitting first light, and the light control member CCM-b controls the first light provided by the organic light emitting device OEL. It may include a light control unit (CCP) that converts a wavelength or transmits the first light.

The display device DD of an exemplary embodiment illustrated in FIG. 3C may include a non-emission area NPXA and emission areas PXA-R, PXA-G, and PXA-B. Each of the light emitting regions PXA-R, PXA-G, and PXA-B may be a region from which light generated by the organic electroluminescent device OEL is emitted. As described above with reference to FIG. 3A , the area of each of the light emitting regions PXA-R, PXA-G, and PXA-B may be different from each other, and in this case, the area may mean an area when viewed on a plane.

In the display device DD of an exemplary embodiment shown in FIG. 3C , the display panel DP- 1 includes the organic electroluminescent element OEL including the organic layer OL as a common layer. That is, in the display device DD according to an exemplary embodiment of FIG. 3C , the display panel DP- 1 has the same wavelength regardless of the light emitting regions PXA-R, PXA-G, and PXA-B of the display device DD. It may be to emit light in the area. For example, the display panel DP- 1 may provide blue light, which is the first color light, to the light control member CCM-b.

In addition, as described above with reference to FIG. 3A, in the display device DD of the exemplary embodiment shown in FIG. 3C, at least one of the plurality of light control units CCP1, CCP2, and CCP3 included in the light control layer CCL is It may be formed from the quantum dot composition of one embodiment.

Hereinafter, a quantum dot composition according to an embodiment will be described with reference to FIGS. 4A and 4B. Figure 4a is a diagram showing a portion of a quantum dot composition (QCP) of one embodiment in more detail. 4B schematically illustrates quantum dots included in a quantum dot composition (QCP) according to an embodiment. In the display device DD of an embodiment described above with reference to FIGS. 2B and 3A to 3C , at least one of the light control units CCP1 , CCP2 , and CCP3 included in the light control layer CCL is a quantum dot composition according to an embodiment. can be formed from

Quantum dots (QDs) have a size of several nm to several tens of nm and have a large surface area, and thus are chemically unstable, and oxidation or deterioration may occur on the surface due to moisture, heat, or light. Therefore, the quantum dots QD may be oxidized or deteriorated by heat and light generated during driving of the display device DD, resulting in reduced luminous efficiency and reduced reliability. In particular, the deterioration of the quantum dots (QD) may be caused by light or heat. Among them, the deterioration by light is an irreversible phenomenon that occurs in the presence of moisture and oxygen, and may be a problem in the reliability of the display device (DD). . When light is applied in the presence of moisture and oxygen, a deterioration phenomenon caused by surface degradation of quantum dots (QDs) is called photocorrosion. Light, moisture, and oxygen are the main causes of photocorrosion of the quantum dots (QD), and among them, light is an essential element for realizing the display device (DD) and cannot be removed. Therefore, in order to prevent photocorrosion of the quantum dots (QD) applied to the display device (DD), a method capable of removing moisture and oxygen is required. In the present invention, a first compound including a first functional group, which is a substituent that can be removed by reacting with moisture, is introduced into the quantum dot composition to remove moisture penetrating during the process, while being present around the quantum dots (QD) during operation. Since deterioration due to photocorrosion can be prevented by removing moisture, reliability and light emitting characteristics of the display device DD can be improved.

The quantum dot composition (QCP) according to an embodiment of the present invention includes a first compound (AD1) including a first functional group capable of reacting with moisture. The first compound AD1 includes at least one of an acetal group and a ketal group, and may serve to collect moisture present around the quantum dots QD.

Referring to FIGS. 4A and 4B , a quantum dot composition (QCP) according to an embodiment may include a quantum dot (QD) and a first compound (AD1). As described above, the quantum dot QD may include a core CR and a shell SL surrounding the core CR. However, the embodiment is not limited thereto, and the quantum dot (QD) may have a single-layer structure or a plurality of shells. Meanwhile, for the quantum dots (QD) included in the quantum dot composition (QCP), the description of the quantum dots described in the display device (DD) of an embodiment described with reference to FIG. 3A may be equally applied.

The quantum dot composition (QCP) of an embodiment includes a first compound (AD1), and the first compound (AD1) may include a first functional group. In one embodiment, the first functional group may include at least one of an acetal group and a ketal group.

As used herein, “substituted or unsubstituted” means a deuterium atom, a halogen atom, a cyano group, a nitro group, an amino group, a silyl group, an oxy group, a thio group, a sulfinyl group, a sulfonyl group, a carbonyl group, a boron group, a phosphine oxide group, a phosphine sulfide group, an alkyl group, an alkenyl group, an alkynyl group, a hydrocarbon ring group, an aryl group, and a heterocyclic group. In addition, each of the substituents exemplified above may be substituted or unsubstituted. For example, a biphenyl group may be interpreted as an aryl group or a phenyl group substituted with a phenyl group.

In the present specification, “forming a ring by combining with adjacent groups” may mean forming a substituted or unsubstituted hydrocarbon ring or a substituted or unsubstituted heterocycle by combining with adjacent groups. Hydrocarbon rings include aliphatic hydrocarbon rings and aromatic hydrocarbon rings. Heterocycles include aliphatic heterocycles and aromatic heterocycles. Hydrocarbon rings and heterocycles may be monocyclic or polycyclic. In addition, rings formed by combining with each other may be connected to other rings to form a spiro structure.

As used herein, "adjacent group" means a substituent substituted on an atom directly connected to the atom on which the substituent is substituted, another substituent substituted on the atom on which the substituent is substituted, or a substituent sterically closest to the substituent. can For example, two methyl groups in 1,2-dimethylbenzene can be interpreted as “adjacent groups” to each other, and 2 methyl groups in 1,1-diethylcyclopentane The two ethyl groups can be interpreted as "adjacent groups" to each other. In addition, two methyl groups in 4,5-dimethylphenanthrene can be interpreted as “adjacent groups” to each other.

In this specification, examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom or an iodine atom.

In this specification, the alkyl group may be straight chain, branched chain or cyclic. The number of carbon atoms of the alkyl group is 1 or more and 50 or less, 1 or more and 30 or less, 1 or more and 20 or less, 1 or more and 10 or less, or 1 or more and 6 or less. Examples of the alkyl group include methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, s-butyl group, t-butyl group, i-butyl group, 2-ethylbutyl group, 3,3-dimethylbutyl group , n-pentyl group, i-pentyl group, neopentyl group, t-pentyl group, cyclopentyl group, 1-methylpentyl group, 3-methylpentyl group, 2-ethylpentyl group, 4-methyl-2-pentyl group , n-hexyl group, 1-methylhexyl group, 2-ethylhexyl group, 2-butylhexyl group, cyclohexyl group, 4-methylcyclohexyl group, 4-t-butylcyclohexyl group, n-heptyl group, 1 -Methylheptyl group, 2,2-dimethylheptyl group, 2-ethylheptyl group, 2-butylheptyl group, n-octyl group, t-octyl group, 2-ethyloctyl group, 2-butyloctyl group, 2-hexyl Siloctyl group, 3,7-dimethyloctyl group, cyclooctyl group, n-nonyl group, n-decyl group, adamantyl group, 2-ethyldecyl group, 2-butyldecyl group, 2-hexyldecyl group, 2-ox Tyldecyl group, n-undecyl group, n-dodecyl group, 2-ethyldodecyl group, 2-butyldodecyl group, 2-hexyldodecyl group, 2-octyldodecyl group, n-tridecyl group, n-tetradecyl group, n -Pentadecyl group, n-hexadecyl group, 2-ethylhexadecyl group, 2-butylhexadecyl group, 2-hexylhexadecyl group, 2-octylhexadecyl group, n-heptadecyl group, n-octadecyl group , n- nonadecyl group, n- icosyl group, 2-ethyl icosyl group, 2-butyl icosyl group, 2-hexyl icosyl group, 2-octyl icosyl group, n-henicosyl group, n- docosyl group, n-tricot practical group, n-tetracosyl group, n-pentacosyl group, n-hexacosyl group, n-heptacosyl group, n-octacosyl group, n-nonacosyl group, and n-triacontyl group; not limited to these

In the present specification, an alkenyl group refers to a hydrocarbon group including at least one carbon double bond in the middle or at the end of an alkyl group having 2 or more carbon atoms. Alkenyl groups can be straight or branched. The carbon number is not particularly limited, but is 2 or more and 30 or less, 2 or more and 20 or less, or 2 or more and 10 or less. Examples of the alkenyl group include, but are not limited to, a vinyl group, a 1-butenyl group, a 1-pentenyl group, a 1,3-butadienyl aryl group, a styrenyl group, and a styrylvinyl group.

In this specification, an alkynyl group refers to a hydrocarbon group including at least one carbon triple bond in the middle or at the end of an alkyl group having 2 or more carbon atoms. Alkynyl groups can be straight or branched. The carbon number is not particularly limited, but is 2 or more and 30 or less, 2 or more and 20 or less, or 2 or more and 10 or less. Specific examples of the alkynyl group may include, but are not limited to, an ethynyl group, a propynyl group, and the like.

In this specification, an aryl group means any functional group or substituent derived from an aromatic hydrocarbon ring. The aryl group may be a monocyclic aryl group or a polycyclic aryl group. The number of ring carbon atoms in the aryl group may be 6 or more and 30 or less, 6 or more and 20 or less, or 6 or more and 15 or less. Examples of the aryl group include a phenyl group, a naphthyl group, a fluorenyl group, anthracenyl group, a phenanthryl group, a biphenyl group, a terphenyl group, a quaterphenyl group, a quinquephenyl group, a sexyphenyl group, a triphenylenyl group, a pyrenyl group, and a benzo fluoro group. Although a lanthenyl group, a chrysenyl group, etc. can be illustrated, it is not limited to these.

In the present specification, the heteroaryl group may include one or more of B, O, N, P, Si, and S as heteroatoms. When the heteroaryl group includes two or more heteroatoms, the two or more heteroatoms may be identical to or different from each other. The heteroaryl group may be a monocyclic heterocyclic group or a polycyclic heterocyclic group. The number of ring carbon atoms in the heteroaryl group may be 2 or more and 30 or less, 2 or more and 20 or less, or 2 or more and 10 or less. Examples of the heteroaryl group include a thiophene group, a furan group, a pyrrole group, an imidazole group, a pyridine group, a bipyridine group, a pyrimidine group, a triazine group, a triazole group, an acridyl group, a pyridazine group, a pyrazinyl group, and a quinoline. group, quinazoline group, quinoxaline group, phenoxazine group, phthalazine group, pyrido pyrimidine group, pyrido pyrazine group, pyrazino pyrazine group, isoquinoline group, indole group, carbazole group, N-arylcarbazole group, N -Heteroarylcarbazole group, N-alkylcarbazole group, benzooxazole group, benzoimidazole group, benzothiazole group, benzocarbazole group, benzothiophene group, dibenzothiophene group, thienothiophene group, benzofuran group, phenan thiazoline group, thiazole group, isoxazole group, oxazole group, oxadiazole group, thiadiazole group, phenothiazine group, dibenzosilol group, dibenzofuran group, and the like, but are not limited thereto.

In this specification, the description of the aryl group described above may be applied except that the arylene group is a divalent group. The description of the heteroaryl group described above can be applied except that the heteroarylene group is a divalent group.

In the present specification, the number of carbon atoms of the carboxy group is not particularly limited, but may be 1 to 40 carbon atoms, 1 to 30 carbon atoms, or 1 to 20 carbon atoms. For example, it may have the following structure, but is not limited thereto.

In the present specification, the thio group may include an alkyl thio group and an aryl thio group. The thio group may mean that a sulfur atom is bonded to the above-defined alkyl group or aryl group. Examples of the thio group include methylthio group, ethylthio group, propylthio group, pentylthio group, hexylthio group, octylthio group, dodecylthio group, cyclopentylthio group, cyclohexylthio group, phenylthio group, and naphthylthio group. etc., but is not limited thereto.

In the present specification, the oxy group may mean that an oxygen atom is bonded to the above-defined alkyl group or aryl group. Oxy groups can include alkoxy groups and aryl oxy groups. An alkoxy group can be straight chain, branched chain or cyclic chain. The number of carbon atoms in the alkoxy group is not particularly limited, but may be, for example, 1 or more and 20 or less, or 1 or more and 10 or less. Examples of the oxy group include methoxy, ethoxy, n-propoxy, isopropoxy, butoxy, pentyloxy, hexyloxy, octyloxy, nonyloxy, decyloxy, benzyloxy, etc., but are limited to these It is not.

In the present specification, the number of carbon atoms of the amine group is not particularly limited, but may be 1 or more and 30 or less. Amine groups may include alkyl amine groups and aryl amine groups. Examples of the amine group include, but are not limited to, a methylamine group, a dimethylamine group, a phenylamine group, a diphenylamine group, a naphthylamine group, a 9-methyl-anthracenylamine group, and a triphenylamine group.

In this specification, direct linkage may mean a single linkage.

"는 연결되는 위치를 의미한다. On the other hand, in this specification "

" means the position to be connected.

In the present specification, (meth)acrylate may mean acrylate and methacrylate.

In the present specification, monofunctional (meth)acrylate means (meth)acrylate having one functional group. Specifically, monofunctional (meth)acrylate means (meth)acrylate containing one (meth)acryloyl group in one molecule. In the resin composition of one embodiment, the monofunctional (meth)acrylate may include a plurality of different (meth)acrylates. For example, the monofunctional (meth)acrylate in the resin composition of one embodiment may include at least one monofunctional acrylate and at least one monofunctional methacrylate.

In the present specification, the bifunctional (meth)acrylate monomer refers to a (meth)acrylate monomer having two functional groups. Specifically, the bifunctional (meth)acrylate monomer refers to a (meth)acrylate monomer in which two (meth)acryloyl groups are included in one molecule. In the resin composition of one embodiment, the bifunctional (meth)acrylate monomer may include a plurality of different monomers. For example, in the resin composition of one embodiment, the bifunctional (meth)acrylate monomer may include at least one bifunctional acrylate monomer and at least one bifunctional methacrylate monomer.

In one embodiment, the first compound (AD1) may be represented by Chemical Formula 1 below.

[Formula 1]

In Formula 1, R ₁ and R ₂ may each independently be a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms. Alternatively, R ₁ and R ₂ may bond to each other to form a ring. In one embodiment, the substituent represented by R ₁ and R ₂ may be a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms in view of the ease of hydrolysis of the first compound (AD1). For example, R ₁ and R ₂ are each independently a substituted or unsubstituted methyl group, a substituted or unsubstituted ethyl group, a substituted or unsubstituted n-propyl group, a substituted or unsubstituted i-propyl group, a substituted or unsubstituted It may be a substituted n-butyl group, a substituted or unsubstituted s-butyl group, a substituted or unsubstituted t-butyl group, or a substituted or unsubstituted i-butyl group. R ₁ and R ₂ may each independently be a substituted or unsubstituted methyl group or a substituted or unsubstituted ethyl group. When R ₁ and R ₂ in Formula 1 are each independently a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms, the hydrolysis reaction of the first compound (AD1) proceeds more easily, and the first compound (AD1) The rate of water collection by hydrolysis of is further increased, and thus the reliability and light emitting characteristics of the display device DD can be further improved.

In Formula 1, R ₃ and R ₄ are each independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, and a substituted or unsubstituted alkyl group having 2 to 20 carbon atoms. Alternatively, it may be an unsubstituted alkynyl group having 2 or more and 20 or less carbon atoms, a substituted or unsubstituted aryl group having 6 or more and 30 or less carbon atoms for forming a ring, or a substituted or unsubstituted heteroaryl group having 2 or more and 30 or less carbon atoms for ring formation.

In one embodiment, the first compound (AD1) may be represented by any one of Chemical Formulas 1-1 to 1-3.

[Formula 1-1]

[Formula 1-2]

[Formula 1-3]

In Formula 1-1 to Formula 1-3, R ₅ and R ₆ are each independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted carboxy group, a substituted or unsubstituted thio group, a substituted or unsubstituted An amine group, a substituted or unsubstituted phosphine group, a hydroxy group, a substituted or unsubstituted oxy group, a nitro group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkyl group having 2 to 20 carbon atoms It may be an alkenyl group, a substituted or unsubstituted aryl group having 6 or more and 30 or less ring carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 or more and 30 or less ring carbon atoms. Alternatively, each of R ₅ and R ₆ may bond to an adjacent group to form a ring.

In Formulas 1-1 to 1-3, R ₇ to R ₉ are each independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 or more and 20 or less carbon atoms, or a substituted or unsubstituted ring-forming carbon atom. It may be an aryl group having 6 or more and 30 or less, or a substituted or unsubstituted heteroaryl group having 2 or more and 30 or less ring carbon atoms.

In Chemical Formulas 1-1 to 1-3, n1 and n2 are each independently an integer of 0 or more and 5 or less. When each of n1 and n2 is 0, the first compound of one embodiment may be unsubstituted with each of R ₅ and R ₆ . When each of n1 and n2 is 5 and each of R ₅ and R ₆ is a hydrogen atom, it may be the same as when each of n1 and n2 is 0. When each of n1 and n2 is an integer of 2 or greater, a plurality of R ₅ and R ₆ may be the same, or at least one of the plurality of R ₅ and R ₆ may be different.

In Chemical Formulas 1-1 to 1-3, R ₁ to R ₃ may be the same as those described in Chemical Formula 1 above.

In one embodiment, the first compound AD1 may further include a second functional group bonded to the surface of the quantum dots QD. The second functional group may be different from the first functional group. In one embodiment, the second functional group may include at least one of a carboxy group, a thio group, an amine group, a phosphine group, and a hydroxy group. Although not shown, the second functional group of the first compound AD1 may be provided in a state of being combined with the quantum dots QD in the quantum dot composition QCP. However, it is not limited thereto, and the second functional group of the first compound (AD1) is provided in the quantum dot composition (QCP) without binding to the quantum dots (QD), and then reacts with the surface of the quantum dots (QD) during the process. may form a bond.

In one embodiment, the first compound (AD1) may be represented by any one of Chemical Formulas 2-1 to 2-5.

[Formula 2-1]

[Formula 2-2]

[Formula 2-3]

[Formula 2-4]

[Formula 2-5]

In Formulas 2-1 to 2-5, Y is a substituted or unsubstituted carboxyl group, a substituted or unsubstituted thio group, a substituted or unsubstituted amine group, a substituted or unsubstituted phosphine group, or a substituted or hydroxyl group. it can be Y may be the aforementioned second functional group moiety.

In Formulas 2-2 to 2-5, A ₁ may be a substituted or unsubstituted arylene group having 6 or more and 30 or less ring carbon atoms, or a substituted or unsubstituted hetero arylene group having 2 or more and 30 or less ring carbon atoms. .

In Formulas 2-2 to 2-5, n3 to n7 are each independently an integer of 0 or more and 20 or less.

In Chemical Formulas 2-1 to 2-5, R ₁ to R ₃ may be the same as those described in Chemical Formula 1 above.

In one embodiment, the first compound may further include a third functional group. The first compound AD1 may include a first functional group and a third functional group different from the first functional group. The third functional group may include a (meth)acrylate group. In one embodiment, the first compound (AD1) may include at least one third functional group in its molecule.

When the first compound AD1 further includes a third functional group, the first compound AD1 according to an embodiment may be a photocurable compound. The first compound AD1 including the first functional group and the third functional group may be included in the quantum dot composition QCP to form a polymerization product without adversely affecting the dispersion of the quantum dots QC.

The quantum dot composition (QCP) of an embodiment may further include other photocurable compounds in addition to the first compound (AD1). The quantum dot composition (QCP) of an embodiment may further include a photocurable compound that is different from the first compound (AD1) and includes a carbon-carbon unsaturated bond. The photocurable compound containing a carbon-carbon unsaturated bond is not particularly limited as long as it contains a carbon-carbon unsaturated bond and is polymerizable by light, but, for example, monofunctional or polyfunctional (meth)acrylates may be used. .

In addition, the quantum dot composition (QCP) of one embodiment may further include a polymer binder. For example, the quantum dot composition (QCP) includes acrylic resins, methacrylic resins, polyisoprene, vinyl resins, epoxy resins, urethane resins, cellulosic resins, siloxane resins, polyimide resins, polyamide resins, and ferryl resins. It may include at least one of ren-based resins. However, it is not limited thereto.

Monofunctional (meth)acrylates include, for example, phenoxyethyl (meth)acrylate, phenoxyethoxyethyl (meth)acrylate, phenoxyhydroxypropyl (meth)acrylate, phenylphenoxyethyl (meth) Acrylates, bromophenoxyethyl (meth)acrylate, polyoxyethylene nonylphenyl ether (meth)acrylate, isobornyl (meth)acrylate, adamantyl (meth)acrylate, methyladamantyl (metha)acrylate )acrylate, ethyladamantyl (meth)acrylate, bornyl (meth)acrylate, tricyclodecanyl (meth)acrylate, dicyclopentanyl (meth)acrylate, dicyclopentenyl (meth)acrylate , cyclohexyl (meth)acrylate, butylcyclohexyl (meth)acrylate, methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, isopropyl (meth)acrylate, butyl (meth)acrylate )Acrylate, amyl (meth)acrylate, isobutyl (meth)acrylate, t-butyl (meth)acrylate, pentyl (meth)acrylate, hexyl (meth)acrylate, heptyl (meth)acrylate, octyl (meth)acrylate, isooctyl (meth)acrylate, ethylhexyl (meth)acrylate, nonyl (meth)acrylate, decyl (meth)acrylate, isodecyl (meth)acrylate, undecyl (meth)acrylate Dodecyl (meth)acrylate, lauryl (meth)acrylate, stearyl (meth)acrylate, isostearyl (meth)acrylate, benzyl (meth)acrylate, ethoxydiethylene glycol (meth) acrylate, polyethylene glycol mono(meth)acrylate, polypropylene glycol mono(meth)acrylate, methoxyethylene glycol (meth)acrylate, ethoxyethyl (meth)acrylate, or mixtures thereof. However, it is not limited thereto.

Polyfunctional (meth)acrylates, for example, ethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, 1,4-butanediol di (meth) Acrylates, 1,6-hexanediol di(meth)acrylate, neopentylglycol di(meth)acrylate, pentaerythritol di(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra (meth)acrylate, dipentaerythritol di(meth)acrylate, dipentaerythritol tri(meth)acrylate, dipentaerythritol penta(meth)acrylate, pentaerythritol hexa(meth)acrylate, bisphenol A epoxy acrylate, bisphenol A di(meth)acrylate, trimethylolpropane tri(meth)acrylate, novolakepoxy(meth)acrylate, ethylene glycol monomethyl ether(meth)acrylate, tris(meth)acrylo yloxyethyl phosphate, diethylene glycol di(meth)acrylate, triethylene glycol di(meth)acrylate, propylene glycol di(meth)acrylate, or mixtures thereof. However, it is not limited thereto.

The quantum dot composition (QCP) of one embodiment may further include additional additives as needed. Additives may be appropriately selected from general additives known in the art in order to adjust the physical properties required for the quantum dot composition (QCP). For example, light stabilizers, crosslinking agents, antioxidants, chain transfer agents, photosensitizers, polymerization inhibitors, leveling agents, surfactants, adhesion imparting agents, plasticizers, ultraviolet absorbers, storage stabilizers, antistatic agents, inorganic fillers, pigments, and Dye etc. are mentioned, but it is not limited to these. Additives may be used alone or in combination of two or more.

In the quantum dot composition (QCP) of an embodiment, when the first compound (AD1) includes the first functional group and the third functional group, the quantum dots (QC) are dispersed in the light control unit (CCP) after the first compound (AD1) is cured. The light emitting efficiency and reliability of the display device DD may be further improved by serving to protect the quantum dots QD from moisture and/or oxygen while forming a medium for the light emission.

In one embodiment, when the first compound includes a first functional group and a third functional group, it may be represented by any one of Chemical Formulas 3-1 to 3-3.

[Formula 3-1]

[Formula 3-2]

[Formula 3-3]

In Formula 3-1, R ₁ 'and R ₂ ' may each independently be a substituted or unsubstituted divalent alkyl group having 1 to 20 carbon atoms.

In Formula 3-1 to Formula 3-3, M ₁ and M ₂ may each independently be a (meth)acrylate group. For example, M ₁ and M ₂ may each independently be represented by Formula 3a below.

In Chemical Formulas 3-2 and 3-3, L ₁ and L ₂ may each independently be a direct bond or a substituted or unsubstituted divalent alkyl group having 1 to 20 carbon atoms.

In Chemical Formulas 3-1 to 3-3, R _a to R _c may each independently be a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms.

In Formulas 3-2 and 3-3, a may be 1 or 2.

In Chemical Formulas 3-1 to 3-3, the same information as described in Chemical Formula 1 may be applied to R ₃ and R ₄ .

[Formula 3a]

In Formula 3a, R _d may be a hydrogen atom or a substituted or unsubstituted methyl group.

The quantum dot composition (QCP) of an embodiment may include two or more kinds of first compounds (AD1). When the quantum dot composition (QCP) includes two or more types of first compounds (AD1), the first compound (AD1) includes the first compound (AD1) including the first functional group and both the first functional group and the third functional group. It may include a first compound (AD1) to do. However, it is not limited thereto.

When the quantum dot composition (QCP) of an embodiment includes the first compound (AD1) including the first functional group and the third functional group, the quantum dot composition (QCP) may further include at least one photoinitiator. When the quantum dot composition (QCP) includes a plurality of photoinitiators, different photoinitiators may be activated by ultraviolet light having different central wavelengths.

The photoinitiator is 2,2-dimethoxy-1,2-diphenylethan-1-one, 1-hydroxy-cyclohexyl-phenyl-ketone (1-hydroxy-cyclohexyl-phenyl-ketone), 2-hydroxy-2-methyl-1-phenyl-1-propanone, 2-hydroxy-2-methyl-1-phenyl-1-propanone hydroxy-1-[4-(2-hydroxyethoxy)phenyl]-2-methyl-1-propanone (2-hydroxy-1-[4-(2-hydroxyethoxy)phenyl]-2-methyl-1- propanone), and 2-hydroxy-1-{4-[4-(2-hydroxy-2-methyl-propionyl)-benzyl]-phenyl}-2-methylprop-1-one (2-hydroxy -1-{4-[4-(2-hydroxy-2-methyl-propionyl)-benzyl]-phenyl}-2-methylpropan-1-one).

In addition, the photoinitiator is 2-methyl-1-[4-(methylthio)phenyl]-2-morpholinopropan-1-non (2-methyl-1[4-(methylthio)phenyl]-2-morpholinopropan- 1-one), 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)-butanone-1 (2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)-butanone-1), 2-dimethylamino-2-(4-methyl-benzyl)-1-(4-morpholin-4-yl-phenyl)-butan-1-one (2-dimethylamino-2-(4-methyl-benzyl)- 1-(4-morpholin-4-yl-phenyl)-butan-1-one), 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 2, 4,6-trimethylbenzoyl-diphenyl phosphinate (2,4,6-trimethylbenzoyl-diphenyl phosphinate), bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide (bis (2,4,6- trimethylbenzoyl)-phenylphosphineoxide), [1-(4-phenylsulfanylbenzoyl)heptylideneamino]benzoate ([1-(4-phenylsulfanylbenzoyl)heptylideneamino]benzoate), [1-[9-ethyl-6-(2 -methylbenzoyl)carbazol-3-yl]ethylideneamino]acetate ([1-[9-ethyl-6-(2-methylbenzoyl)carbazol-3-yl]ethylideneamino]acetate), and bis(2,4- Cyclopentadienyl)bis[2,6-difluoro-3-(1-pyryl)phenyl] Titanium(IV) (Bis(2,4-cyclopentadienyl)bis[2,6-difluoro-3-(1- pyrryl) phenyl] titanium (IV)).

In one embodiment, the first compound (AD1) may be any one of the compounds shown in Compound Group 1 to Compound Group 3 below. At least one of the plurality of light control units CCP1 , CCP2 , and CCP3 according to an embodiment may include at least one compound among compounds shown in Compound Group 1 to Compound Group 3 .

[Compound group 1]

[Compound group 2]

[Compound group 3]

Referring back to FIG. 4A , the quantum dot composition QCP may include a solvent SV in which the quantum dots QD and the first compound AD1 are dispersed. The quantum dots (QD) and the first compound (AD1) may be provided while being dispersed in the solvent (SV). In the step of forming the light control unit CCP, the solvent SV may be removed. However, it is not limited thereto, and some of the solvent SV may remain in the light control unit CCP.

The solvent SV may be an organic solvent or an inorganic solvent such as water. Organic solvents include, for example, hexane, toluene, chloroform, dimethyl sulfoxide, octane, xylene, hexadecane, Cyclohexylbenzene, triethylene glycol monobutyl ether or dimethyl formamide Decane, Dodecane Hexadecene, Cyclohexylbenzene, Tetra Hydronaphthalene, Ethylnaphthalene, Ethylbiphenyl, Isopropylnaphthalene, Diisopropylnaphthalene, Diisopropylbiphenyl, Xylene, Iso IsoPropylbenzene, pentylbenznene, diisopropylbenzene, decahydronaphthalene, phenylnaphthalene, cyclohexyldecahydronaphthalene, decylbenzene, dodecyl Benzene, Octylbenzene, Cyclohexane, Cyclopentane, Cycloheptane, Methanol, Ethanol, Propanol, Isopropanol, Ethylene It may include glycol (Ethylene glycol), propylene glycol (Propylene glycol), diethylene glycol (Diethylene glycol), etc., but is not limited thereto.

In one embodiment, the content of the first compound (AD1) may be 30 wt% or less based on 100 wt% of the total content of the quantum dot composition (QCP). For example, the content of the first compound (AD1) may be 0.01 wt% or more and 30 wt% or less. When the content of the first compound (AD1) included in the quantum dot composition (QCP) satisfies the aforementioned range, a sufficient moisture trapping effect can be obtained without adversely affecting the dispersion of the quantum dots (QC) in the entire composition. Therefore, light emitting efficiency characteristics and reliability of the display device DD may be improved. When the content of the first compound AD1 exceeds 30 wt%, the dispersion characteristics of the quantum dots QC may deteriorate and the functions of other components included in the quantum dot composition QCP may deteriorate.

5 is a cross-sectional view showing a part of a light control member according to an embodiment of the present invention. FIG. 5 shows an enlarged view of area AA of FIG. 3A. Hereinafter, the structure of the first light control unit CCP1 among the plurality of light control units CCP1 , CCP2 , and CCP3 is mainly illustrated, but the description of the first light control unit CCP1 will be described below. The same may be applied to at least one of the third light control units CCP3.

Referring to FIGS. 3A and 5 together, in the light control member CCM according to an exemplary embodiment, at least one of the plurality of light control parts CCP may include quantum dots QD and an additive AD. The additive AD may include a first functional group or a group formed by hydrolysis of the first functional group. Specifically, the additive AD may include a first compound AD1 including a first functional group or a second compound AD2 including a group formed by hydrolysis of the first functional group. The second compound (AD2) may refer to a material formed by hydrolyzing the first compound (AD1). In one embodiment, the first functional group may include at least one of an acetal group and a ketal group. The group formed by hydrolysis of the first functional group may be a ketone group or an aldehyde group.

In one embodiment, the first compound (AD1) may be represented by Chemical Formula 1, and the second compound (AD2) may be represented by Chemical Formula 1A below.

[Formula 1]

[Formula 1A]

In Formula 1, R ₁ and R ₂ are each independently a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms. Alternatively, R ₁ and R ₂ are bonded to each other to form a ring. In one embodiment, R ₁ and R ₂ may each independently be a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms. For example, R ₁ and R ₂ may each independently be a substituted or unsubstituted methyl group or a substituted or unsubstituted ethyl group.

In Formula 1 and Formula 1A, R ₃ and R ₄ are each independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, and a substituted or unsubstituted alkene having 2 to 20 carbon atoms. A substituted or unsubstituted alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms for ring formation, or a substituted or unsubstituted heteroaryl group with 2 to 30 carbon atoms for ring formation. .

The additive (AD) may be represented by any one of Chemical Formulas 1-1 to 1-6. In one embodiment, the first compound AD1 is represented by any one of Formulas 1-1 to 1-3, and the second compound AD2 is represented by any one of Formulas 1-4 to 1-6 below. can

[Formula 1-1]

[Formula 1-2]

[Formula 1-3]

[Formula 1-4]

[Formula 1-5]

[Formula 1-6]

In Formulas 1-1 to 1-6, R ₅ and R ₆ are each independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted carboxy group, a substituted or unsubstituted thio group, a substituted or unsubstituted amine group, a substituted or unsubstituted phosphine group, a hydroxyl group, a substituted or unsubstituted oxy group, a nitro group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, and a substituted or unsubstituted alkyl group having 2 to 20 carbon atoms It may be an alkenyl group, a substituted or unsubstituted aryl group having 6 or more and 30 or less ring carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 or more and 30 or less ring carbon atoms. Alternatively, each of R ₅ and R ₆ may bond to an adjacent group to form a ring.

In Formulas 1-1 to 1-6, R ₇ to R ₉ are each independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or a substituted or unsubstituted ring. It may be an aryl group having 6 to 30 carbon atoms or a substituted or unsubstituted heteroaryl group having 2 to 30 carbon atoms for forming a ring. R ₇ and R ₈ may each independently be a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms. R ₉ may be a substituted or unsubstituted aryl group having 6 to 30 carbon atoms. For example, R ₉ may be a substituted or unsubstituted phenyl group.

In Chemical Formulas 1-1 to 1-6, n1 and n2 are each independently an integer of 0 or more and 5 or less. When each of n1 and n2 is 0, the first compound of one embodiment may be unsubstituted with each of R ₅ and R ₆ . When each of n1 and n2 is 5 and each of R ₅ and R ₆ is a hydrogen atom, it may be the same as when each of n1 and n2 is 0. When each of n1 and n2 is an integer of 2 or greater, a plurality of R ₅ and R ₆ may be the same, or at least one of the plurality of R ₅ and R ₆ may be different.

In Formulas 1-1 to 1-6, R ₁ to R ₃ may be the same as those described in Formula 1 above.

6A is a cross-sectional view showing a part of a light control member according to another embodiment of the present invention. 6B is a diagram schematically illustrating a quantum dot composite (QD-C) including a quantum dot (QD) and an additive (ADa) structure bonded to a surface of the quantum dot (QD) according to an embodiment. FIG. 6A shows an enlarged view of area AA of FIG. 3 .

Referring to FIGS. 3A, 6A, and 6B, at least one of the plurality of light control units CCP1, CCP2, and CCP3 included in the light control layer CCL according to an exemplary embodiment includes a quantum dot composite QD-C. can do. The quantum dot complex QD-C included in at least one of the light control units CCP1 , CCP2 , and CCP3 may have an additive ADa bonded to a surface of the quantum dot QD. The quantum dot composite (QD-C) may be one in which an additive (ADa) for preventing oxidation or corrosion of the quantum dots (QD) is attached to the surface of the quantum dots (QD) while improving the dispersibility and charge injection characteristics of the quantum dots (QD). .

In an embodiment, the additive ADa may further include a second functional group FG2 bonded to the surface of the quantum dot QD. The additive ADa may include a first functional group (FG1) and a second functional group (FG2), or a group formed by hydrolysis of the first functional group (FG1) (HFG1) and a second functional group (FG2). there is. Specifically, the additive ADa includes the first compound AD1a including the first functional group FG1 and the second functional group FG2, or the additive ADa has the first functional group FG1 A second compound (AD2a) including a hydrolyzed group (HFG1) and a second functional group (FG2) may be included. The second compound AD2a may be a material formed by hydrolyzing the first compound AD1a. The same content as the first functional group of the first compound AD1 described above with reference to FIG. 4A may be applied to the first functional group FG1. The second functional group (FG2) is not particularly limited as long as it is a substituent capable of bonding to the quantum dot (QD), but may include, for example, at least one of a carboxy group, a thio group, an amine group, a phosphine group, and a hydroxy group. can As the additive (ADa) of an embodiment includes the first functional group (FG1) and the second functional group (FG2), the additive (ADa) improves the surface modification characteristics of the quantum dots (QD) while oxidizing and/or improving the quantum dots (QD). Alternatively, it may serve to prevent corrosion.

The additive ADa may further include a connection part CP. The connecting portion CP of the additive ADa connects the first functional group FG1 and the second functional group FG2, or a group formed by hydrolysis of the first functional group FG1 and a second functional group ( FG2) may be connected. The connection part CP may perform a function of adjusting the degree of dispersion of the quantum dot composite QD-C in the quantum dot composition QCP by adjusting the length of the additive ADa. The connecting portion (CP) is, for example, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 20 carbon atoms, It may include at least one of a substituted or unsubstituted aryl group having 6 to 30 carbon atoms and a substituted or unsubstituted heteroaryl group having 2 to 30 carbon atoms. Depending on the type of solvent in which the quantum dot complex QD-C is dispersed, the functional groups included in the connecting portion CP or the length of the chain may be changed. However, it is not limited thereto, and in the additive ADa of an embodiment, the connecting portion CP may be omitted, and the first functional group FG1 and the second functional group FG2 of the additive ADa may be directly connected. The group (HFG1) formed by hydrolysis of the functional group (FG1) and the second functional group (FG2) may be directly connected.

In one embodiment, the additive (ADa) may be represented by Formula A or Formula B below. The first compound (AD1a) of the additive (ADa) according to an embodiment may be represented by the following Chemical Formula A, and the second compound (AD2a) of the additive (ADa) may be represented by the following Chemical Formula (B).

[Formula A]

[Formula B]

In Formula A and Formula B, Y may be a second functional group (FG2). That is, Y may be a substituted or unsubstituted carboxy group, a substituted or unsubstituted thio group, a substituted or unsubstituted amine group, a substituted or unsubstituted phosphine group, or a hydroxy group.

In Chemical Formulas A and B, Z may be a linking portion (CP) connecting the first functional group (FG1) and the second functional group (FG2). Z is a direct linkage, substituted or unsubstituted divalent alkyl group having 1 to 20 carbon atoms, substituted or unsubstituted divalent alkenyl group having 2 to 20 carbon atoms, substituted or unsubstituted 2 to 20 carbon atoms It may be a divalent alkynyl group, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, or a substituted or unsubstituted hetero arylene group having 2 to 30 carbon atoms.

In Formula A and Formula B, m1 is an integer of 0 or more and 20 or less. When m1 is 0, the linking position represented by Z may be a direct bond. That is, when m1 is 0, the first compound (AD1) may not include the connecting portion (CP) connecting the first functional group (FG1) and the second functional group (FG2).

In Formula A and Formula B, R ₁ to R ₃ may be the same as those described in Formula 1 above.

In one embodiment, the additive (ADa) may be represented by any one of Chemical Formulas 2-1 to 2-10. The first compound (AD1a) of the additive (ADa) may be represented by any one of Chemical Formulas 2-1 to 2-5 below. The second compound (AD2a) of the additive (ADa) may be represented by any one of Chemical Formulas 2-6 to 2-10 below.

[Formula 2-1]

[Formula 2-2]

[Formula 2-3]

[Formula 2-4]

[Formula 2-5]

[Formula 2-6]

[Formula 2-7]

[Formula 2-8]

[Formula 2-9]

[Formula 2-10]

Chemical Formulas 2-1 to 2-5 represent cases in which the type and number of substituents represented by Z in Chemical Formula A are specified, and Chemical Formulas 2-6 to Chemical Formulas 2-10 represent the types of substituents represented by Z in Chemical Formula B and Indicates the case where the number is specified.

In Formulas 2-1 to 2-10, Y is a substituted or unsubstituted carboxyl group, a substituted or unsubstituted thio group, a substituted or unsubstituted amine group, a substituted or unsubstituted phosphine group, or a substituted or hydroxyl group. it can be For example, Y may be an unsubstituted carboxy group, an unsubstituted thio group, an unsubstituted amine group, an unsubstituted phosphine group, or a hydroxy group.

In Formulas 2-1 to 2-10, A ₁ may be a substituted or unsubstituted arylene group having 6 or more and 30 or less ring carbon atoms, or a substituted or unsubstituted hetero arylene group having 2 or more and 30 or less ring carbon atoms. . In one embodiment, A ₁ may be a substituted or unsubstituted arylene group having 6 or more and 30 or less ring carbon atoms. For example, A ₁ may be substituted or unsubstituted phenylene.

In Formulas 2-1 to 2-10, n3 to n7 are each independently an integer of 0 or more and 20 or less.

In Chemical Formulas 2-1 to 2-10, the same information as described in Chemical Formula 1 may be applied to R ₁ to R ₃ .

Referring back to FIGS. 3A and 6A , at least one of the plurality of light control units CCP1 , CCP2 , and CCP3 in the light control layer CCL according to an embodiment may be formed from the quantum dot composition QCP according to an embodiment.

At least one of the plurality of light control units CCP1 , CCP2 , and CCP3 may include a plurality of quantum dot complexes QD-C. In one embodiment, the first light control part CCP1 and the second light control part CCP2 among the plurality of light control parts CCP1 , CCP2 , and CCP3 are each formed from the quantum dot composition QCP of one embodiment, and the first light control part (CCP1) and the second light control unit (CCP2) may each include a plurality of quantum dot composites (QD-C). When at least one of the light control units CCP1 , CCP2 , and CCP3 includes a plurality of quantum dot composites QD-C, the quantum dot composites QD-C included in the at least one light control unit CCP are stacked in layers. can achieve In FIG. 6A, quantum dot composites (QD-C) having a circular cross section are illustratively arranged to form approximately two layers, but the embodiment is not limited thereto. For example, according to the thickness of the light control unit CCP, the shape of the quantum dots QD included in the light control unit CCP, the average diameter of the quantum dots QD, the type of additive ADa connected to the quantum dots QD, etc. The arrangement of the quantum dot complex (QD-C) may vary. Specifically, in the light control unit (CCP), the quantum dot complexes (QD-C) may be arranged to be adjacent to each other to form one layer or to form a plurality of layers such as two or three layers.

The second functional group FG2 of the additive ADa may bind to the surface of the quantum dot QD, and the first functional group FG1 may be exposed to the outside. As shown in FIG. 6B, as the second functional group FG2 is bonded to the surface of the quantum dot QD, the first functional group FG1 serving to prevent oxidation and/or corrosion of the quantum dot QD ( QD) can be exposed to the outside.

The quantum dot complex (QD-C) included in the quantum dot composition according to an embodiment of the present invention has a second functional group (FG2) bound to the surface of the quantum dot (QD), and is connected to the second functional group (FG2) to form a quantum dot (QD) and an additive (ADa) including a first functional group (FG1) exposed to the outside. Accordingly, the additive (ADa) of an embodiment can prevent oxidation and/or corrosion of the quantum dots (QD) while improving the dispersibility and charge transport characteristics of the quantum dots (QD) in the quantum dot composition, so that the display device (DD) ), it can exhibit excellent luminous efficiency and lifespan characteristics.

7A is a flowchart illustrating a method of manufacturing a display device according to an exemplary embodiment. 7B is a flow chart in which a step (S200) of forming a light control layer is subdivided according to an exemplary embodiment.

Referring to FIG. 7A , a method of manufacturing a display device according to an exemplary embodiment includes preparing a display panel ( S100 ) and forming a light control layer ( S200 ).

Referring to FIG. 7B , forming a light control layer according to an embodiment (S200) includes forming a preliminary light control unit by providing a quantum dot composition (S210), and drying or heat-treating the preliminary light control unit at a first temperature. It includes a step (S220) of doing.

8A to 8C are cross-sectional views illustrating some steps of a manufacturing method of a display device according to an exemplary embodiment of the present invention. 8A to 8C sequentially illustrate steps of forming a light control layer in a method of manufacturing a display device according to an embodiment of the present invention. Hereinafter, in describing a method of manufacturing a display device according to an exemplary embodiment with reference to FIGS. 8A to 8C , the same reference numerals are assigned to components identical to those described above, and detailed descriptions thereof are omitted.

A manufacturing method of a display device according to an exemplary embodiment of the present invention includes preparing a display panel and forming a light control layer on the display panel.

Referring to FIG. 8A , forming a light control layer in a method of manufacturing a display device according to an exemplary embodiment includes providing a quantum dot composition (QCP) on a reference surface to form a preliminary light control part (P-CCP, FIG. 8B ). Include steps. The method of providing the quantum dot composition (QCP) on the reference surface is not particularly limited, and spin coating method, cast method, LB method (Langmuir-Blodgett), inkjet printing method, laser printing method, laser induced thermal imaging (Laser Induced Thermal Imaging, LITI) and the like can be used. 8A shows that the quantum dot composition (QCP) is applied on the reference surface through the nozzle (NZ), but is not limited thereto, and the quantum dot composition (QCP) may be provided on the reference surface through various methods.

In addition, FIGS. 8A to 8C exemplarily show that the display element layer (DP-ED) is a configuration providing a reference surface on which the quantum dot composition (QCP) is applied, but is not limited thereto, and the quantum dot composition (QCP) is light control A functional layer included in the member CCM, for example, a base layer BL or a color filter layer CFL, may be applied on a reference surface provided. Meanwhile, before the step of applying the quantum dot composition (QCP), a step of patterning a plurality of barrier ribs (BK) on the reference surface may be further included. For example, as shown in FIG. 8A, when the configuration for providing the reference surface is the display element layer (DP-ED), patterning a plurality of barrier ribs (BK) on the reference surface before applying the quantum dot composition (QCP). Further steps may be included.

The quantum dot composition (QCP) may be dropped between the plurality of barrier ribs (BK), respectively. The quantum dot composition QCP includes the quantum dots QD and the first compound AD1, and the quantum dot composition QCP may be dropped between the plurality of barrier ribs BK through the nozzle NZ. The first compound AD1 includes a first functional group, and the first functional group may include at least one of an acetal group and a ketal group. The quantum dot composition (QCP) may form a preliminary light control unit (P-CCP). The preliminary light control part P-CCP formed through the quantum dot composition QCP may include the quantum dots QD and the first compound AD1. The quantum dot composition (QCP) may include a solvent (SV). The quantum dot composition QCP may include the quantum dots QD and the first compound AD1 dispersed in the solvent SV.

Although not shown, at least one of an exposure process and a pre-bake (PRB) process may be performed after forming the preliminary light control unit P-CCP. For example, after forming the preliminary light control unit P-CCP, a pre-bake process may be performed through an exposure process. The exposure process may be a step of irradiating ultraviolet light (UV) to the preliminary light control unit (P-CCP). The exposure process may be a step of UV-curing the quantum dot composition included in the preliminary light control unit (P-CCP). Specific conditions such as temperature and time of the pre-bake process may be appropriately selected depending on the type and capacity of the material. However, it is not limited thereto, and the exposure process and the pre-bake process may be omitted in some cases.

FIG. 8B is a diagram schematically illustrating a step ( S220 ) of drying or heat-treating the preliminary light control unit (P-CCP) at a first temperature in the method of manufacturing a display device according to an exemplary embodiment. Drying or heat-treating the preliminary light control unit P-CCP at a first temperature according to an embodiment may include drying or heat-treating the preliminary light control unit P-CCP at the first temperature condition or applying heat at the first temperature. This may be a step of inducing a reaction in which the first compound AD1 included in the preliminary light control unit P-CCP is hydrolyzed. In the step of forming the light control layer (CCL) according to an embodiment of the present invention (S200), the degree of hydrolysis of the first compound (AD1) is determined by drying or heat-treating the preliminary light control layer (P-CCP) at a first temperature. can be adjusted in stages. Meanwhile, in the present specification, the drying or heat treatment at the first temperature may be referred to as a “post-bake (POB) process.

The hydrolysis reaction of the first compound (AD1) may be a reversible reaction. The first compound AD1 including an acetal group or a ketal group may be hydrolyzed to form a second compound AD2 including a ketone group or an alkehydride group, and alcohol may be formed as a by-product. Since the hydrolysis reaction of the first compound (AD1) is a reversible reaction, the reaction may be induced in a forward direction by adjusting reaction conditions such as a temperature of a reactant and a concentration of a product. For example, after the hydrolysis reaction, alcohol as a reaction by-product can be removed from the reaction system. In one embodiment, alcohol may be removed by drying at a first temperature or heat treatment at a first temperature condition. In conclusion, the reversible reaction of the hydrolysis reaction of the first compound (AD1) can be moved in the forward direction by continuously removing the alcohol generated in the reaction system, whereby the water collection of the first compound (AD1) can be more easily performed. there is.

In addition, alcohol, which is a by-product generated by the hydrolysis reaction of the first compound AD1, may be removed in the step of drying or heat-treating the preliminary light control unit P-CCP at a first temperature (S220). However, it is not limited thereto, and a part of the alcohol generated by the hydrolysis reaction of the first compound (AD1) may remain in the light control unit (CCP).

In one embodiment, the first temperature is not particularly limited, but may be lower than the boiling point of the first compound (AD1). For example, the first temperature may be greater than or equal to 0°C and less than 180°C. When the first temperature is lower than the boiling point of the first compound (AD1), the first compound (AD1) may remain without evaporation during the drying or heat treatment at the first temperature, and thus moisture collection may be more effectively generated.

Hereinafter, the mechanism of action of the first compound (AD1) included in the quantum dot composition (QCP) of the present invention will be described in detail. The first compound (AD1) included in the quantum dot composition (QCP) according to an embodiment may be hydrolyzed according to a mechanism shown in Scheme 1 below. Reaction Scheme 1 below shows a hydrolysis mechanism of an acetal compound represented by Chemical Formula 1 among the first compounds (AD1) according to an embodiment of the present invention. This is only an example for explaining the present invention, but the present invention is not limited thereto.

[Scheme 1]

Referring to Scheme 1, the first compound (AD1) containing an acetal group may be hydrolyzed in the presence of moisture to provide a second compound (AD2) containing an aldehyde group. In Reaction Scheme 1, it is shown that the first compound (AD1) is hydrolyzed in the presence of an acid catalyst, but is not limited thereto. The hydrolysis reaction of the first compound (AD1) may proceed without an acid catalyst depending on reaction conditions, reactants, and the like. The first compound (AD1) may be deacetalized by a hydrolysis reaction. When the first compound (AD1) is hydrolyzed in the presence of an acid catalyst, the acid catalyst used for hydrolysis is not particularly limited as long as it is used as an acid in a normal reaction, and the molecular structure or reaction of the first compound (AD1) It can be appropriately selected according to conditions and the like.

In one embodiment, the boiling point of the first compound (AD1) may be 180 °C or higher. When the boiling point of the first compound AD1 satisfies the aforementioned range, the first compound AD1 is not removed during a process performed at a high temperature during the manufacturing process of the display device DD, for example, a bake process. It may exist in the finally obtained light control unit (CCP). Accordingly, since moisture can be collected by the first compound AD1 even during driving, deterioration due to photocorrosion of the quantum dots QD can be prevented, and thus the light emitting characteristics and reliability of the display device DD can be further improved. .

Referring to FIG. 8C , the light control unit CCP may include a quantum dot QD, a first compound AD1, and a second compound AD2. The second compound AD2 may be a material formed by hydrolyzing the first compound AD1 included in the preliminary light control unit P-CCP. The second compound (AD2) may include a group formed by hydrolyzing the first functional group of the first compound (AD1). That is, the second compound (AD2) may have the same structure as the first compound (AD1) except that it includes a group formed by hydrolysis of the first functional group other than the first functional group of the first compound (AD1). The first compound (AD1) and the second compound (AD2) may be included in the finally manufactured light control unit (CCP). However, it is not limited thereto, and the second compound (AD2) may be removed during the process. For example, the second compound AD2 may be removed after drying or heat-treating the preliminary light control unit P-CCP at a first temperature ( S220 ). Meanwhile, the description of the quantum dot (QD), the first compound (AD1), and the second compound (AD2) may be the same as described above with reference to FIGS. 4A to 6B.

Hereinafter, a display device including a light control unit formed from a quantum dot composition according to an embodiment of the present invention will be described in detail with reference to Examples and Comparative Examples. The examples shown below are examples for helping understanding of the present invention, and the scope of the present invention is not limited thereto.

[Example]

1. Preparation of quantum dot composition

1) Example

Hexane is added to a solution of propylene glycol monomethyl ether acetate (PGMEA) in which QDs are dispersed at about 30wt%, followed by centrifugation to separate QDs. After adding a small amount of solvent to the separated QD and dissolving it, remove the solvent after mixing with the acrylate-based monomer. Here, the first compound is added in an amount of about 5 wt % based on the total solution. Thereafter, a scattering agent, an initiator, and a dispersant are added, followed by stirring for 30 minutes or more to obtain a quantum dot composition.

2) Comparative example

A quantum dot composition was prepared in the same manner as in the above Example, except that the first compound was not used in the above Example. That is, the quantum dot composition of Comparative Example does not contain the first compound compared to the quantum dot composition of Example.

2. Photoconversion pattern evaluation

(initial process)

The quantum dot composition prepared in Example or Comparative Example was spin-coated on an organic substrate at 150 rpm for 5 seconds to obtain a film. The obtained film is prebaked at 100 DEG C for 100 seconds. The initial light conversion rate of the prebaked film was measured.

(Process A)

After irradiating ultraviolet rays on the prebaked film using an exposure machine, post-baking is performed at 180° C. for 30 minutes. First light conversion rates of the exposed and post-baked films were measured.

(B process)

A capping layer containing SiN _x is formed on the post-baked film by sputtering to a thickness of 300 nm to form a light conversion pattern. A second photoconversion rate of the prepared photoconversion pattern was measured.

(1) Evaluation of light conversion rate

9 is a diagram showing a change in light conversion rate over time in Examples and Comparative Examples. In FIG. 9, the light conversion rate of Examples and Comparative Examples was measured with QE-2000 (Otsuka Co.) equipment, and the bare glass was placed on a blue BLU (455 nm) covered with a diffusing film and measured with a detector. , measured by calculating the emission peak area of the converted light relative to the blue light absorption peak area. For example, the power conversion efficiency (PCE) of Examples and Comparative Examples may be calculated by Equation 1 below.

[Equation 1]

PCE = (A ₂ /A ₁ )X100

In Equation 1, A ₁ means the area of the blue light absorption spectrum, and A ₂ means the area of the emission spectrum for the converted light. For example, A ₁ may correspond to an absorption peak area for blue light absorbed by the quantum dot. A ₂ may correspond to an emission peak area for light converted by the quantum dots.

Referring to FIG. 9 , at the initial stage of driving, the light conversion rates of the Example and Comparative Example were similar at about 30% and about 29%, respectively. It can be seen that it remains similar to In comparison, in the display device of Comparative Example using the quantum dot composition of Comparative Example, it can be seen that the light conversion rate gradually decreases until about 250 hours and then rapidly decreases after 250 hours. Accordingly, it can be seen that the display device of the embodiment using the quantum dot composition of the embodiment can maintain excellent luminous efficiency over time.

(2) Evaluation of process maintenance rate

10 is a graph showing process retention rates of display devices according to Examples and Comparative Examples by measuring them. On the other hand, in the present specification, the process maintenance rate refers to the ratio of the light conversion rate after the process to the light conversion rate before the process is performed. In FIG. 10, in order to confirm the effect of preventing deterioration of quantum dots by the first compound included in the quantum dot composition of an embodiment, the process maintenance ratio for each process of the display device according to the embodiment and the comparative example was evaluated, and the results are shown. In FIG. 9 , the first process maintenance ratio PMR1 in “Process A” may be calculated according to Equation 1 below, and the second process maintenance ratio PMR2 in “Process B” may be calculated according to Equation 2 below.

[Equation 1]

PMR1=(E _A /E _R )X100

[Equation 2]

PMR1=(E _B /E _R )X100

In Equations 1 and 2, E _R means the light conversion rate measured after the "initial" process, E _A means the light conversion rate measured after the "A process", and _EB means the light conversion rate measured after the "A process" means light conversion rate.

Referring to FIG. 10, it can be seen that the process retention rate in the manufacture of the example using the quantum dot composition of one example is about 104% and about 102% after process A and process B, respectively. That is, it can be confirmed that the display device of the embodiment has more improved light conversion rates after process A and process B than those after the initial process. In comparison, the process maintenance rate in the preparation of Comparative Example using the comparative quantum dot composition was about 97% and about 96% after process A and process B, respectively, and it could be confirmed that the process maintenance rate decreased as the process progressed. Therefore, since the display device of an embodiment is manufactured using the quantum dot composition including the quantum dot composition including the first compound, moisture present around the quantum dots can be effectively removed during operation, and thus the reliability of the display device can be improved. it can be seen that there is The display device DD including the light control unit CCP formed from the quantum dot composition QCP according to an exemplary embodiment may exhibit improved light emitting characteristics and reliability. In the case of quantum dots (QDs), light emitting properties may be deteriorated due to deterioration due to external environments, such as moisture, heat, and light. According to the present invention, the first compound (AD1) including a first functional group capable of trapping moisture is included in the quantum dot composition (QCP). Accordingly, it is possible to efficiently protect the quantum dots (QD) from moisture penetrating during the process, and it is possible to prevent deterioration due to photocorrosion by removing moisture present around the quantum dots (QD) even during operation, thereby improving light emitting characteristics and A display device DD indicating reliability may be implemented.

Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art or those having ordinary knowledge in the art do not depart from the spirit and technical scope of the present invention described in the claims to be described later. It will be understood that various modifications and changes can be made to the present invention within the scope. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

DD: display device DP: display panel
CCM: light control unit CCP: light control unit
QCP: Quantum Dot Composition AD: Additives
AD1: first compound AD2: second compound

Claims (20)

quantum dots;
a first compound comprising a first functional group; and
contains a solvent;
The first functional group quantum dot composition comprising at least one of an acetal group and a ketal group. According to claim 1,
The quantum dot composition wherein the content of the first compound is 30 wt% or less based on 100 wt% of the total content of the quantum dot composition. According to claim 1,
The first compound is a quantum dot composition represented by Formula 1 below:
[Formula 1]

In Formula 1,
R ₁ and R ₂ are each independently a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or R ₁ and R ₂ are bonded to each other to form a ring;
R ₃ and R ₄ are each independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted An alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms for ring formation, or a substituted or unsubstituted heteroaryl group with 2 to 30 carbon atoms for ring formation. According to claim 3,
The first compound is a quantum dot composition represented by any one of Formulas 1-1 to 1-3:
[Formula 1-1]

[Formula 1-2]

[Formula 1-3]

In Formula 1-1 to Formula 1-3,
R ₅ and R ₆ are each independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted carboxy group, a substituted or unsubstituted thio group, a substituted or unsubstituted amine group, a substituted or unsubstituted phosphine group, Hydroxy group, substituted or unsubstituted oxy group, nitro group, substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, substituted or unsubstituted ring carbon atoms An aryl group having 6 or more and 30 or less, or a substituted or unsubstituted heteroaryl group having 2 or more and 30 or less ring carbon atoms, or bonded to an adjacent group to form a ring,
R ₇ to R ₉ are each independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms for forming a ring, or a substituted or It is an unsubstituted heteroaryl group having 2 or more and 30 or less ring carbon atoms,
n1 and n2 are each independently an integer of 0 or more and 5 or less,
R ₁ to R ₃ are the same as defined in Formula 1 above. According to claim 1,
The first compound is
A quantum dot composition further comprising a second functional group bonded to the surface of the quantum dot and different from the first functional group. According to claim 5,
The second functional group quantum dot composition comprising at least one of a carboxyl group, a thio group, an amine group, a phosphine group, and a hydroxy group. According to claim 1,
The first compound is a quantum dot composition represented by any one of Formulas 2-1 to 2-5:
[Formula 2-1]

[Formula 2-2]

[Formula 2-3]

[Formula 2-4]

[Formula 2-5]

In Formula 2-1 to Formula 2-5,
R ₁ and R ₂ are each independently a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or R ₁ and R ₂ are bonded to each other to form a ring;
R ₃ is a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms for ring formation, or a substituted or unsubstituted carbon atom for ring formation 2 or more and 30 or less heteroaryl groups,
Y is a substituted or unsubstituted carboxy group, a substituted or unsubstituted thio group, a substituted or unsubstituted amine group, a substituted or unsubstituted phosphine group, or a substituted or unsubstituted hydroxy group,
A ₁ is a substituted or unsubstituted arylene group having 6 or more and 30 or less ring carbon atoms, or a substituted or unsubstituted hetero arylene group having 2 or more and 30 or less ring carbon atoms,
n3 to n7 are each independently an integer of 0 or more and 20 or less. According to claim 1,
The first compound further comprises a third functional group different from the first functional group,
The third functional group is a quantum dot composition comprising a (meth) acrylate group. According to claim 1,
The boiling point of the first compound is 180 ℃ or more quantum dot composition. According to claim 1,
The quantum dot composition comprising a core and a shell surrounding the core. a light emitting element outputting source light; and
A light control layer disposed on the light emitting element and including a plurality of light control units;
At least one of the plurality of light control units includes a quantum dot and an additive,
The additive includes a first functional group or a group formed by hydrolysis of the first functional group,
The first functional group includes at least one of an acetal group and a ketal group. According to claim 11,
The additive is a display device represented by Formula 1 or Formula 1A below:
[Formula 1]

[Formula 1A]

In Formula 1 and Formula 1A,
R ₁ and R ₂ are each independently a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or R ₁ and R ₂ are bonded to each other to form a ring;
R ₃ and R ₄ are each independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted An alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms for ring formation, or a substituted or unsubstituted heteroaryl group with 2 to 30 carbon atoms for ring formation. According to claim 11,
The additive is a display device represented by any one of the following Chemical Formulas 1-1 to 1-6:
[Formula 1-1]

[Formula 1-2]

[Formula 1-3]

[Formula 1-4]

[Formula 1-5]

[Formula 1-6]

In Formula 1-1 to Formula 1-6,
R ₁ and R ₂ are each independently a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or R ₁ and R ₂ are bonded to each other to form a ring;
R ₃ and R ₄ are each independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms for forming a ring, or a substituted or It is an unsubstituted heteroaryl group having 2 or more and 30 or less ring carbon atoms,
R ₅ and R ₆ are each independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted carboxy group, a substituted or unsubstituted thio group, a substituted or unsubstituted amine group, a substituted or unsubstituted phosphine group, A substituted or unsubstituted hydroxyl group, a substituted or unsubstituted oxy group, a nitro group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted It is a ring-forming aryl group having 6 to 30 carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring-forming carbon atoms, or bonded to an adjacent group to form a ring,
R ₇ to R ₉ are each independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms for forming a ring, or a substituted or It is an unsubstituted heteroaryl group having 2 or more and 30 or less ring carbon atoms,
n1 and n2 are each independently an integer of 0 or more and 5 or less. According to claim 11,
The additive further includes a second functional group bonded to the surface of the quantum dots and different from the first functional group,
The second functional group includes at least one of a carboxy group, a thio group, an amine group, a phosphine group, and a hydroxy group. According to claim 11,
The additive is a display device represented by any one of the following Chemical Formulas 2-1 to 2-10:
[Formula 2-1]

[Formula 2-2]

[Formula 2-3]

[Formula 2-4]

[Formula 2-5]

[Formula 2-6]

[Formula 2-7]

[Formula 2-8]

[Formula 2-9]

[Formula 2-10]

In Formula 2-1 to Formula 2-10,
R ₁ and R ₂ are each independently a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or R ₁ and R ₂ are bonded to each other to form a ring;
R ₃ is a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms for ring formation, or a substituted or unsubstituted carbon atom for ring formation 2 or more and 30 or less heteroaryl groups,
Y is a substituted or unsubstituted carboxy group, a substituted or unsubstituted thio group, a substituted or unsubstituted amine group, a substituted or unsubstituted phosphine group, or a substituted or unsubstituted hydroxy group,
A ₁ is a substituted or unsubstituted arylene group having 6 or more and 30 or less ring carbon atoms, or a substituted or unsubstituted hetero arylene group having 2 or more and 30 or less ring carbon atoms,
n3 to n7 are each independently an integer of 0 or more and 20 or less. According to claim 11,
The additive further comprises a third functional group different from the first functional group,
The display device of claim 1 , wherein the third functional group includes a (meth)acrylate group. According to claim 11,
The source light is light of a first wavelength,
The light control layer
a first light control unit that converts the source light into light of a second wavelength different from the first wavelength;
a second light control unit that converts the source light into light of a third wavelength different from the first and second wavelengths; and
A display device comprising a third light control unit that transmits the source light. Preparing a display panel; and
forming a light control layer including a plurality of light control units on the display panel;
Forming at least one light control unit among the plurality of light control units,
Forming a preliminary light control unit by providing a quantum dot composition including quantum dots and a first compound including a first functional group; and
Drying or heat-treating the preliminary light control unit at a first temperature;
The method of claim 1 , wherein the first functional group includes at least one of an acetal group and a ketal group. According to claim 18,
Based on 100 wt% of the total content of the quantum dot composition, the content of the first compound is 30 wt% or less. According to claim 18,
The first temperature is lower than the boiling point of the first compound.

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