Quantum dot coating structure, packaging structure and display device

Abstract

The utility model discloses a quantum dot coating structure, a packaging structure and a display device, and relates to the technical field of display. The coated quantum dot structure comprises a glass bead and a quantum dot sealed in the glass bead. According to the quantum dot coating structure, the quantum dots are sealed in the glass beads, the glass beads can isolate the quantum dots from being in contact with the external environment, the effect of blocking water and oxygen is achieved, the stability of the quantum dots is improved, and the service life of the quantum dots is prolonged.

Description

Technical Field

[0001] The present application relates to the field of display technology, and particularly to a coated quantum dot structure, a packaging structure, and a display device. Background Art

[0002] Quantum Dots are semiconductor materials at the nanoscale, characterized by quantum confinement effects at the spatial scale. The size of quantum dots can adjust their electronic structure, enabling them to exhibit special optical and electronic properties, which are significantly different from traditional bulk semiconductor materials. Quantum dots have excellent properties such as size tunability, quantum confinement effects, high optical performance, wide wavelength absorption and emission, chemical stability and biocompatibility, and efficient electron transport.

[0003] Due to their unique electronic structure and excellent optical properties, quantum dots have been widely studied and applied in multiple fields, especially in the display field. Mini LED (Mini Light-Emitting Diode) backlight technology, compared with traditional LED (Light Emitting Diode) backlight technology, directly uses RGB tri-color LEDs as the backlight source, offering better color integrity and gamut range. Moreover, Mini LEDs are smaller in size than traditional LEDs, enabling more refined control and resulting in higher contrast for the display panel.

[0004] In related technologies, quantum dots and Mini LED packaging lenses are often combined to improve the display image quality. However, currently, quantum dots are usually encapsulated by being wrapped with glue. However, the glue is prone to aging, turning yellow and deteriorating, and has insufficient sealing, easily leading to performance attenuation and shortened lifespan of quantum dots during use. Summary of the Utility Model

[0005] In view of this, the present application provides a coated quantum dot structure, a packaging structure, and a display device.

[0006] The embodiment of the present application is implemented as follows. A coated quantum dot structure includes a glass bead and quantum dots sealed within the glass bead.

[0007] Optionally, in some embodiments of the present application, the average particle size of the glass bead is 1 μm to 100 μm; the average particle size of the quantum dots is 1 nm to 100 nm.

[0008] Optionally, in some embodiments of the present application, there are multiple quantum dots within the glass bead.

[0009] Optionally, in some embodiments of the present application, the quantity ratio of the glass bead to the quantum dots is 1:(1 - 100).

[0010] Optionally, in some embodiments of the present application, the glass beads are hollow glass beads; and / or

[0011] The quantum dots are selected from one or more of single-structure quantum dots, core-shell structure quantum dots, and perovskite-type quantum dots.

[0012] Correspondingly, an embodiment of the present application further provides a packaging structure, which includes:

[0013] A substrate;

[0014] A light-emitting element disposed on the substrate; and

[0015] An active layer disposed on the substrate and covering the light-emitting element, the active layer includes the above-mentioned coated quantum dot structure, or the coated quantum dot structure prepared by the above-mentioned preparation method.

[0016] Optionally, in some embodiments of the present application, the active layer further includes silica gel.

[0017] Optionally, in some embodiments of the present application, the mass ratio of silica gel to the coated quantum dot structure is 100:(5-20).

[0018] Optionally, in some embodiments of the present application, the packaging structure further includes a lens, and the lens is disposed on the substrate and covers the active layer.

[0019] Correspondingly, an embodiment of the present application further provides a display device, and the display device includes the above-mentioned packaging structure.

[0020] For the coated quantum dot structure provided by the present application, the quantum dots are sealed in the glass beads. The glass beads can isolate the quantum dots from contact with the external environment, play a role in blocking water and oxygen, improve the stability and service life of the quantum dots; the glass beads have appropriate transmittance and refractive index, can reduce the loss of light emitted by the quantum dots, and effectively improve the light efficiency; the glass beads also have excellent heat insulation properties, can effectively block the heat emitted from the light-emitting element, protect the quantum dots, and prevent the quantum dots from being damaged by heat; the glass beads have high self-stability, and no other harmful substances will be generated after long-term light radiation, thereby reducing the impact on the surface state of the quantum dots, and further ensuring the effective light-emitting performance of the quantum dots. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic structural diagram of a quantum dot-coated structure provided by an embodiment of the present application;

[0023] Figure 2 It is a schematic diagram of a preparation method of a quantum dot-coated structure provided by an embodiment of the present application;

[0024] Figure 3 It is a flowchart of a preparation method of a quantum dot-coated structure provided by an embodiment of the present application;

[0025] Figure 4 It is a schematic structural diagram of a packaging structure provided by an embodiment of the present application.

[0026] Reference numerals:

[0027] 10 - Quantum dot-coated structure; 11 - Glass bead; 12 - Quantum dot;

[0028] 100 - Packaging structure; 20 - Substrate; 30 - Active layer; 40 - Lens. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application. In addition, it should be understood that the specific implementation manners described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0030] In the present application, unless otherwise stated, the orientation terms such as "upper" and "lower" usually refer to the upper and lower in the actual use or working state of the device, specifically the drawing direction in the accompanying drawings; while "inner" and "outer" refer to the outline of the device. In addition, in the description of the present application, the term "comprising" means "including but not limited to". The use of terms such as first, second, and third is only for marking and does not impose a numerical requirement or establish an order.

[0031] In the present application, "and / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. Where A and B can be singular or plural.

[0032] In this application, "at least one" means one or more, and "a plurality" means two or more. "One or several", "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item or plural items. For example, "at least one of a, b, or c", or "at least one of a, b, and c" can both represent: a, b, c, a - b (i.e., a and b), a - c, b - c, or a - b - c, where a, b, and c can be single or multiple respectively.

[0033] The various embodiments of this application may exist in the form of a range; it should be understood that the description in the form of a range is only for convenience and brevity, and should not be construed as a rigid limitation on the scope of this application; therefore, it should be considered that the range description has specifically disclosed all possible sub - ranges and individual values within that range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub - ranges such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., and individual numbers within the range, such as 1, 2, 3, 4, 5, and 6, and this applies regardless of the range. Additionally, whenever a numerical range is indicated herein, it means including any cited number (fraction or integer) within the indicated range.

[0034] The technical solution of this application is as follows:

[0035] In a first aspect, please refer to Figure 1 , an embodiment of this application provides a coated quantum dot structure 10. The coated quantum dot structure 10 includes glass beads 11 and quantum dots 12 sealed within the glass beads 11.

[0036] For the coated quantum dot structure 10 provided by this application, the quantum dots 12 are sealed within the glass beads 11. The glass beads 11 can isolate the quantum dots 12 from contact with the external environment, play a role in blocking water and oxygen, and improve the stability and service life of the quantum dots 12; the glass beads 11 have appropriate transmittance and refractive index, which can reduce the loss of light emitted by the quantum dots 12 and effectively improve the light efficiency; the glass beads 11 also have excellent heat insulation properties, which can effectively block the heat dissipated from the light - emitting element, protect the quantum dots 12, and prevent the quantum dots 12 from failing due to heat; the glass beads 11 have relatively high self - stability and will not produce other harmful substances after long - term light radiation, thereby reducing the impact on the surface state of the quantum dots 12 and further ensuring the effective light - emitting performance of the quantum dots 12.

[0037] In some embodiments, the average particle size of the glass beads 11 is 1 μm to 100 μm. For example, it can be 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, or a range between any two values, etc. The particle size of the glass beads 11 can be measured by a micrometer.

[0038] In some embodiments, the average particle size of the quantum dots 12 is 1 nm to 100 nm. For example, it can be 10 nm, 20 nm, 30 nm, 40 nm, 50 nm, 60 nm, 70 nm, 80 nm, 90 nm, or a range between any two values, etc. The particle size of the quantum dots 12 can be measured by a transmission electron microscope (TEM).

[0039] Preferably, the average particle size of the quantum dots 12 is 1 nm to 10 nm. For example, it can be 2 nm, 3 nm, 4 nm, 5 nm, 6 nm, 7 nm, 8 nm, 9 nm, or a range between any two values, etc. Within this range of the average particle size, the quantum dots 12 have strong optical properties, high quantum efficiency, and good optical stability.

[0040] It can be understood that for the same coated quantum dot structure 10, the particle size of the glass beads 11 is larger than that of the quantum dots 12.

[0041] In some embodiments, there are multiple quantum dots 12 in the glass beads 11.

[0042] Furthermore, the quantity ratio of the glass beads 11 to the quantum dots 12 is 1:(1 - 100). For example, it can be 1:5, 1:10, 1:20, 1:30, 1:40, 1:50, 1:60, 1:70, 1:80, 1:90, or a range between any two ratios, etc. Within this range of the quantity ratio, the quantum dots 12 have good dispersibility in the glass beads 11, and the luminescence performance is more stable.

[0043] Preferably, the quantity ratio of the glass beads 11 to the quantum dots 12 is 1:(5 - 50). For example, it can be 1:15, 1:25, 1:35, 1:45, or a range between any two ratios, etc. Within this range of the quantity ratio, the space of the glass beads 11 can be fully utilized to avoid waste.

[0044] In some embodiments, the refractive index of the glass beads 11 is 1.4 to 1.42. The appropriate refractive index of the glass beads 11 can make the light output more uniform.

[0045] In some embodiments, the glass beads 11 are hollow glass beads 11. It can be understood that the quantum dots 12 are located in the hollow region inside the glass beads 11.

[0046] In some embodiments, the material of the glass beads 11 is silicate glass. Silicate glass has good optical transparency, chemical stability, mechanical strength, thermal stability, uniform refractive index, and dispersion, which can not only effectively seal the quantum dots 12 to avoid their influence by the external environment, but also contribute to reducing the light emission loss of the quantum dots 12 and improving the overall stability and optical performance of the quantum dot-coated structure 10.

[0047] Furthermore, the silicate glass is selected from aluminosilicate glass, sodium silicate glass, calcium silicate glass, or borosilicate glass.

[0048] Preferably, the material of the glass beads 11 is aluminosilicate glass, specifically Corning glass. Corning glass has high durability and relatively high strength, which can effectively protect the quantum dots 12.

[0049] In some embodiments, the quantum dots 12 are selected from one or more of single-structure quantum dots, core-shell structure quantum dots, and perovskite-type quantum dots.

[0050] Furthermore, the materials of single-structure quantum dots, the core materials of core-shell structure quantum dots, and the shell materials of core-shell structure quantum dots can be respectively selected from, but not limited to, one or more of II-VI group compounds, IV-VI group compounds, III-V group compounds, and I-III-VI group compounds. The shell of the core-shell structure quantum dots includes one or more layers. The II-VI group compounds can be selected from, but not limited to, one or more of CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, and HgZnSTe. The IV-VI group compounds can be selected from, but not limited to, one or more of SnS, SnSe, SnTe, PbS, PbSe, PbTe, SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe, SnPbSSe, SnPbSeTe, and SnPbSTe. The III-V group compounds can be selected from, but not limited to, one or more of GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb, GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InNP, InNAs, InNSb, InPAs, InPSb, GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, and InAlPSb. The I-III-VI group compounds can be selected from, but not limited to, one or more of CuInS2, CuInSe2, and AgInS2.

[0051] As an example, the core-shell structure quantum dots can be selected from but not limited to one or more of CdSe / CdSeS / CdS, InP / ZnSeS / ZnS, CdZnSe / ZnSe / ZnS, CdSeS / ZnSeS / ZnS, CdSe / ZnS, CdSe / ZnSe / ZnS, ZnSe / ZnS, ZnSeTe / ZnS, CdSe / CdZnSeS / ZnS, and InP / ZnSe / ZnS. In the expressions such as CdSe / ZnS above, " / " means that the material after " / " (as the shell layer) coats the material before " / " (as the core layer).

[0052] The materials of perovskite quantum dots can be selected from but not limited to doped or undoped inorganic perovskite semiconductors, or organic-inorganic hybrid perovskite semiconductors. The general structural formula of the inorganic perovskite semiconductor is AMX3, where A is a Cs + ion, M is a divalent metal cation selected from 2+ Pb 2+ Sn 2+ Cu 2+ Ni 2+ Cd 2+ Cr 2+ Mn 2+ Co 2+ Fe 2+ Ge 2+ Yb 2+ Eu - Cl - Br - I n-2 or one or more of them, and X is a halogen anion selected from + CH3(CH2) n NH3 2+ or [NH3(CH2) 2+ NH3] 2+ where n≥2, M is a divalent metal cation selected from 2+ Pb 2+ Sn 2+ Cu 2+ Ni 2+ Cd 2+ Cr 2+ Mn 2+ Co 2 + Eu 2+ or one or more of them, and X is a halogen anion selected from - Cl - Br- One or more of them.

[0053] Please refer to Figure 2 and Figure 3 The embodiments of the present application further provide a preparation method for a coated quantum dot structure 10, including the following steps:

[0054] S11. Provide glass beads 11 and create holes in the glass beads 11.

[0055] S12. Provide quantum dots 12 and allow the quantum dots 12 to enter the glass beads 11 through the holes, and seal the holes.

[0056] In some embodiments, the method for creating holes in the glass beads 11 includes laser drilling. The laser can process the spherical glass beads 11 with high processing accuracy and without other consumables. Specifically, the laser beam can be focused on the surface of the glass beads 11 to form pulsed energy, vaporize the area to generate a vaporization zone, and diffuse to both the inner and outer surfaces simultaneously to form holes.

[0057] The quantum dots 12 can be injected into the glass beads 11.

[0058] In some embodiments, the method for sealing the holes includes laser fusion sealing. Laser fusion sealing is a technique that uses a laser beam to locally heat the surface of a material above the melting point and rapidly cool it in a short time to form a sealed joint. Laser fusion sealing can be precisely controlled to achieve local heating without damaging the surrounding area; and the laser fusion sealing process is non-contact, which can reduce the risk of physical contact and avoid contaminating the quantum dots 12; the laser fusion sealing speed is fast, and the sealing process can be completed in an extremely short time, improving production efficiency and manufacturing speed; due to laser heating and rapid cooling, the formed sealed joint has high strength and sealing performance, enabling the quantum dots 12 to be stably sealed inside the glass beads 11.

[0059] It can be understood that the particle size of the glass beads 11 is greater than the aperture of the holes, and the aperture of the holes is greater than the particle size of the quantum dots 12.

[0060] In some embodiments, the average particle size of the glass beads 11 is 1 μm to 100 μm. The average particle size of the quantum dots 12 is 1 nm to 100 nm.

[0061] In some embodiments, the average aperture of the holes is 50 nm to 500 nm, for example, it can be 100 nm, 150 nm, 200 nm, 250 nm, 300 nm, 350 nm, 400 nm, 450 nm or the range between any two values, etc. Within this aperture range, it is beneficial for the quantum dots 12 to be injected into the interior of the glass beads 11.

[0062] For the materials of the glass beads 11 and the quantum dots 12, refer to the above text and will not be elaborated here.

[0063] In a second aspect, please refer to Figure 4 , an embodiment of the present application further provides a packaging structure 100, which includes: a substrate 20; a light-emitting element disposed on the substrate 20; and an active layer 30 disposed on the substrate 20 and covering the light-emitting element. The active layer 30 includes the coated quantum dot structure 10 of the above first aspect, or the coated quantum dot structure 10 prepared by the preparation method of the above second aspect.

[0064] In some embodiments, the active layer 30 further includes silica gel.

[0065] Furthermore, the mass ratio of silica gel to the coated quantum dot structure 10 is 100:(5-20), for example, it can be 100:6, 100:8, 100:10, 100:12, 100:15, 100:18 or the range between any two ratios, etc. Within this mass ratio range, silica gel and the coated quantum dot structure 10 act synergistically to improve the transmittance of light in the active layer 30. It can be understood that the mass of the coated quantum dot structure 10 is the sum of the masses of the glass beads 11 and the quantum dots 12.

[0066] In some embodiments, the packaging structure 100 further includes a lens 40, and the lens 40 is disposed on the substrate 20 and covers the active layer 30. The lens 40 can be obtained by dispensing, and dispensing has good shaping ability, which can effectively improve the visual effect uniformity of light output.

[0067] Furthermore, the lens 40 can be a concave lens 40.

[0068] In a third aspect, an embodiment of the present application further provides a display device, and the display device includes the packaging structure 100 of the third aspect.

[0069] The display device can be any electronic product with a display function. The electronic product includes but is not limited to a smart phone, a tablet computer, a notebook computer, a digital camera, a digital video camera, a smart wearable device, a smart weighing electronic scale, a vehicle-mounted display, a television, or an e-book reader. Among them, the smart wearable device can be, for example, a smart bracelet, a smart watch, a virtual reality (VR) helmet, etc.

[0070] The following specifically illustrates the present application through specific embodiments. The following embodiments are only partial embodiments of the present application and do not limit the present application.

[0071] Embodiment 1

[0072] This embodiment provides a quantum dot encapsulated structure, and the preparation method is as follows: Provide glass beads, and use a laser to create holes in the glass beads; Inject 50 CdZnS quantum dots into the glass beads through the holes, and then use laser welding to seal the holes to obtain the quantum dot encapsulated structure.

[0073] Example 2

[0074] This embodiment provides a quantum dot encapsulated structure, and the preparation method is as follows: Provide glass beads, and use a laser to create holes in the glass beads; Inject 50 CdSe / ZnS quantum dots into the glass beads through the holes, and then use laser welding to seal the holes to obtain the quantum dot encapsulated structure.

[0075] Example 3

[0076] This embodiment provides a quantum dot encapsulated structure, and the preparation method is as follows: Provide glass beads, and use a laser to create holes in the glass beads; Inject 100 CdZnS quantum dots into the glass beads through the holes, and then use laser welding to seal the holes to obtain the quantum dot encapsulated structure.

[0077] Example 4

[0078] This embodiment provides a quantum dot encapsulated structure, and the preparation method is as follows: Provide glass beads, and use a laser to create holes in the glass beads; Inject 1 CdZnS quantum dot into the glass beads through the holes, and then use laser welding to seal the holes to obtain the quantum dot encapsulated structure.

[0079] Comparative Example 1

[0080] This comparative example provides CdZnS quantum dots.

[0081] Comparative Example 2

[0082] This comparative example provides CdSe / ZnS quantum dots.

[0083] Comparative Example 3

[0084] This embodiment provides a quantum dot wrapped structure, which is obtained by wrapping CdZnS quantum dots with glue.

[0085] Comparative Example 4

[0086] This embodiment provides a modified quantum dot, which is obtained by adding CdZnS quantum dots to a siloxane solution and modifying the quantum dots by hydrolysis of siloxane to generate silica.

[0087] Perform stability tests and T95@1000nit lifetime tests on the quantum dot encapsulated structures obtained in Examples 1 to 4, the quantum dots in Comparative Examples 1 to 2, the quantum dot wrapped structure in Comparative Example 3, and the modified quantum dots in Comparative Example 4, and the results are shown in Table 1.

[0088] Among them, the method for the stability test includes: testing the photoluminescence quantum yield (PLQY) of the quantum dots prepared at 0 h and placed for 3000 h, and calculating the stability through PLQY 3000h / PLQY 0h *100%. The higher this ratio, the better the stability. The PLQY is tested using a steady-state fluorescence spectrometer from Edinburgh Instruments. The model of the instrument is FS5, and the accessory for measuring the photoluminescence quantum yield is SC-30. The test temperature is 50 °C, and the humidity is 90%.

[0089] The test method for the lifetime T95@1000nit is as follows: under the drive of a constant current or voltage, the time required when the brightness decreases to a certain proportion of the maximum brightness. The time when the brightness drops to 95% of the maximum brightness is defined as T95, and this lifetime is the measured lifetime. To shorten the test cycle, the lifetime test is usually carried out by accelerated aging at high brightness, and the lifetime at high brightness is obtained by fitting with an extended exponential decay brightness decay fitting formula. For example, the lifetime at 1000 nit is denoted as T95@1000nit. The specific calculation formula is as follows:

[0090]

[0091] Among them, T95 L is the lifetime at low brightness, T95 H is the measured lifetime at high brightness, L H is the acceleration to the maximum brightness, L L is 1000 nit, and A is the acceleration factor.

[0092] Table 1

[0093]

[0094] As can be seen from Table 1:

[0095] As can be seen from Examples 1 to 4 and Comparative Examples 1 to 4, the coated quantum dot structure provided by the present application still maintains a high photoluminescence quantum yield after 3000 h of accelerated aging experiment, indicating that the sealing effect of the glass beads is good, avoiding the erosion of quantum dots by water, oxygen, high temperature, etc., and improving the service life of the glass beads; while the untreated quantum dots in Comparative Examples 1 to 2, without the protection of glass beads, in a high temperature and high humidity environment, after 3000 h, the PLQY drops sharply to 0. The glue in Comparative Example 3 has a certain protective effect on the quantum dots, but it is prone to aging and yellowing in a high temperature and high humidity environment, reducing its protective effect. In Comparative Example 4, siloxane hydrolysis is used to protect the quantum dots, and the silica generated by siloxane hydrolysis cannot completely coat the quantum dot structure, so the quantum dots are still affected by high temperature and high humidity.

[0096] In summary, the present application uses glass beads to seal quantum dots, effectively improving the stability of quantum dots and extending the service life of quantum dots.

[0097] The above has introduced in detail the coated quantum dot structure, the encapsulation structure and the display device provided by the embodiments of the present application. Specific examples are used herein to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A coated quantum dot structure, characterized in that, The coated quantum dot structure includes glass beads and quantum dots sealed within the glass beads.

2. The coated quantum dot structure according to claim 1, characterized in that, The average particle size of the glass beads is 1 μm to 100 μm; the average particle size of the quantum dots is 1 nm to 100 nm.

3. The coated quantum dot structure according to claim 1, wherein, There are multiple quantum dots within the glass beads.

4. The coated quantum dot structure according to claim 1, wherein, The quantity ratio of the glass beads to the quantum dots is 1:(1 - 100).

5. The coated quantum dot structure according to claim 1, wherein The glass beads are hollow glass beads; and / or The quantum dots are selected from one or more of single-structure quantum dots, core-shell structure quantum dots, and perovskite-type quantum dots.

6. An encapsulation structure, characterized in that, The encapsulation structure includes: A substrate; A light-emitting element disposed on the substrate; and An active layer disposed on the substrate and covering the light-emitting element, the active layer including the coated quantum dot structure according to any one of claims 1 to 5.

7. The encapsulation structure according to claim 6, wherein The active layer further includes silica gel.

8. The encapsulation structure according to claim 7, wherein The mass ratio of the silica gel to the coated quantum dot structure is 100:(5 - 20).

9. The encapsulation structure according to claim 6, characterized in that, The encapsulation structure further includes a lens, the lens being disposed on the substrate and covering the active layer.

10. A display device, characterized in that, The display device includes the encapsulation structure according to any one of claims 6 to 9.

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