Application of ultra-high light efficiency perovskite quantum dot PC materials in mini modules

Abstract

The present invention relates to the field of display technology and discloses the application of ultra-high-light-efficiency perovskite quantum dot (PC) materials to mini modules. The method comprises the following steps: S1, synthesizing perovskite quantum dots: preparing perovskite quantum dots by hot injection in an inert gas environment; S2, anti-quenching treatment: coating the surface of the perovskite quantum dots with an anti-quenching layer, wherein the anti-quenching layer comprises an inorganic oxide shell or an organic polymer shell; S3, dispersing the perovskite quantum dots after the anti-quenching treatment in an organic solvent; S4, compounding the PC material; S5, patterning; and S6, curing and molding. By combining the quantum dot dispersion with the PC material, the PC material's excellent mechanical properties, chemical stability, and high heat resistance are utilized to provide a stable supporting matrix for the perovskite quantum dots. The composite material thus possesses both the high-light-efficiency luminescent properties of the perovskite quantum dots and the practical performance of the PC material, meeting the dual requirements of the mini module for both optical and physical properties.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and specifically to the application of ultra-high light-efficiency perovskite quantum dot PC materials in mini modules. Background Art

[0002] With the continuous development of display technology, Mini LED, as a new generation of display technology, has received widespread attention and application in the display field due to its advantages such as high brightness, high contrast, high color gamut, and light weight. Mini module, as the core component of Mini LED display, has put forward higher requirements on its optical performance and material properties. Ultra-high light efficiency perovskite quantum dots have unique luminescence characteristics, which can significantly improve the color purity and luminescence efficiency of the display. PC material has become an ideal carrier matrix due to its good mechanical properties, chemical stability and processing performance.

[0003] However, with current technology, it is difficult for a single material to achieve both good optical performance and solid physical protection performance, which affects the service life and stability of the Mini module. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides the application of ultra-high light-efficiency perovskite quantum dot PC materials in mini modules, solving the problem that a single material is difficult to achieve both optical performance and physical protection, which affects the service life and stability of the mini module.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: comprising the following steps:

[0006] S1. Synthesis of perovskite quantum dots: Perovskite quantum dots were prepared by hot injection under an inert gas environment.

[0007] S2, anti-quenching treatment: coating the surface of the perovskite quantum dots with an anti-quenching layer, wherein the anti-quenching layer includes an inorganic oxide shell layer or an organic polymer shell layer;

[0008] S3, quantum dot dispersion: dispersing the perovskite quantum dots after anti-quenching treatment in an organic solvent and stirring to form a uniform quantum dot dispersion;

[0009] S4, PC material compounding: mixing the quantum dot dispersion with PC (polycarbonate) material, and dispersing the quantum dots in the PC material matrix through solution blending method;

[0010] S5. Patterning: Using photolithography technology, a preset quantum dot pattern is formed on the surface of the PC material;

[0011] S6. Curing and molding: The patterned PC material is hot-pressed to form ultra-high light-efficiency perovskite quantum dot PC material, which is applied to the functional layer of the Mini module.

[0012] Preferably, the perovskite quantum dots prepared in S1 have a particle size of 5-20 nm.

[0013] Preferably, the thickness of the anti-quenching layer in S2 is 1-10 nm, the inorganic oxide shell layer includes silicon dioxide, aluminum oxide or titanium dioxide, and the organic polymer shell layer includes polystyrene, polymethyl methacrylate or polyvinyl pyrrolidone.

[0014] Preferably, the anti-quenching treatment specifically comprises the following steps:

[0015] S201, preparing an anti-quenching layer precursor solution by adding an organic solvent to the corresponding material of the inorganic oxide shell layer or the organic polymer shell layer;

[0016] S202, dispersing the perovskite quantum dots in the anti-quenching layer precursor solution while stirring to promote mixing, thereby forming an anti-quenching layer;

[0017] S203, forming an anti-quenching layer on the glass substrate by spin coating, with the spin coating speed set to 3000-5000 rpm and the spin coating time being 30-60 seconds;

[0018] S204. After the anti-quenching layer is formed, if it is an inorganic oxide shell layer, it is cured in an oven at 80-120°C for 2-4 hours; if it is an organic polymer shell layer, it is dried in a vacuum oven at 60-80°C for 6-8 hours.

[0019] Preferably, the organic solvent in S3 includes toluene or chlorobenzene, and the mass concentration of the perovskite quantum dots in the quantum dot dispersion is 1% to 3%.

[0020] Preferably, the mixing mass ratio of the quantum dot dispersion to the PC material in S4 is 1:5-1:10.

[0021] Preferably, the patterning process comprises the following steps:

[0022] S501, spin coating photoresist on the surface of the preliminary composite PC material;

[0023] S502, then covering the photoresist with a mask having a preset quantum dot pattern, and exposing it to ultraviolet light;

[0024] S503 , after the exposure is completed, developing is performed with a developer for 3 to 5 minutes, and the unexposed photoresist is removed to form a preset quantum dot pattern on the surface of the PC material.

[0025] Preferably, the hot pressing temperature in S6 is 180-220° C., the pressure is 5-10 MPa, the hot pressing time is 10-20 minutes, and the Mini module functional layer includes an optical film, a light guide plate and an encapsulation layer.

[0026] The present invention provides the application of ultra-high light-efficiency perovskite quantum dot PC materials in mini modules. It has the following beneficial effects:

[0027] 1. The present invention combines quantum dot dispersion with PC material, and utilizes the good mechanical properties, chemical stability and high heat resistance of PC material to provide a stable supporting matrix for perovskite quantum dots. As a result, the composite material has both the high light efficiency luminescence characteristics of perovskite quantum dots and the practical performance of PC material, meeting the dual requirements of mini modules for material optical and physical properties.

[0028] 2. The present invention effectively prevents fluorescence quenching during subsequent processing and use by treating perovskite quantum dots with anti-quenching treatment, and coats the surface of quantum dots with an inorganic oxide shell or an organic polymer shell, which can effectively isolate the influence of external factors on the quantum dots, extend their fluorescence lifetime, maintain luminous efficiency, and ensure the optical performance stability of the mini module during long-term use.

[0029] 3. The present invention forms a preset quantum dot pattern on the surface of PC material through photolithography technology, controls the light-emitting area and light propagation path of the mini module, adjusts the emission direction and intensity distribution of light, etc., achieves the purpose of local light effect regulation, improves the utilization rate and light output efficiency of light, and thus optimizes the display effect of the mini module. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a flow chart of the application of the ultra-high light-efficiency perovskite quantum dot PC material of the present invention in a mini module. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] Please see the attached Figure 1 The embodiment of the present invention provides an application of ultra-high light efficiency perovskite quantum dot PC material in a mini module, comprising the following steps:

[0033] S1. Synthesis of perovskite quantum dots: Perovskite quantum dots were prepared by hot injection under an inert gas environment.

[0034] S2, anti-quenching treatment: coating the surface of the perovskite quantum dots with an anti-quenching layer, wherein the anti-quenching layer includes an inorganic oxide shell layer or an organic polymer shell layer;

[0035] S3, quantum dot dispersion: dispersing the perovskite quantum dots after anti-quenching treatment in an organic solvent and stirring to form a uniform quantum dot dispersion;

[0036] S4, PC material compounding: mixing the quantum dot dispersion with the PC material, and dispersing the quantum dots in the PC material matrix through the solution blending method;

[0037] S5. Patterning: Using photolithography technology, a preset quantum dot pattern is formed on the surface of the PC material;

[0038] S6. Curing and molding: The patterned PC material is hot-pressed to form ultra-high light-efficiency perovskite quantum dot PC material, which is applied to the functional layer of the Mini module.

[0039] Specifically, the hot injection method used in S1 under an inert gas environment can effectively prevent the perovskite quantum dots from being oxidized or interfered with by other impurities during the synthesis process, ensuring the integrity of the crystal structure and stable optical properties of the quantum dots. Perovskite quantum dots with uniform particle size and high luminous efficiency are prepared, laying the foundation for the subsequent realization of ultra-high light efficiency.

[0040] The S2 anti-fading treatment improves the stability of perovskite quantum dots and prevents fluorescence quenching during subsequent processing and use. Coating the surface of the quantum dots with an inorganic oxide shell or an organic polymer shell effectively isolates the quantum dots from external factors, extending their fluorescence lifetime and maintaining luminous efficiency. After anti-fading treatment, the quantum dots can still emit light stably in complex environments, ensuring the optical performance stability of the mini module during long-term use.

[0041] The perovskite quantum dots after anti-quenching treatment are evenly dispersed in an organic solvent through S3 to form a quantum dot dispersion that is convenient for subsequent processing. The quantum dots are fully dispersed in the solvent by stirring to avoid agglomeration. The evenly dispersed quantum dots can be evenly distributed in the PC matrix when subsequently compounded with PC materials, ensuring the uniformity of the optical properties of the composite material and avoiding local luminescence differences, thereby making the mini module emit light more uniformly.

[0042] The quantum dot dispersion is combined with PC material through S4, taking advantage of the PC material's excellent mechanical properties, chemical stability, and processing properties to provide a stable support matrix for the perovskite quantum dots. The solution blending method can evenly disperse the quantum dots in the PC material matrix, forming a composite material with good comprehensive properties. This composite material has both the high-efficiency luminescence characteristics of perovskite quantum dots and the practical performance of PC materials, meeting the dual requirements of the mini module for material optical and physical properties.

[0043] The S5 uses photolithography technology to form a preset quantum dot pattern on the surface of the PC material, controlling the mini module's light-emitting area and light propagation path. Furthermore, the emission direction and intensity distribution of light are adjusted according to the design requirements of the mini module to achieve the purpose of local light effect regulation, improve light utilization and light extraction efficiency, and thus optimize the display effect of the mini module.

[0044] The patterned PC material is hot-pressed through S6, so that the material is finally formed into the required shape and size. The formed ultra-high light-efficiency perovskite quantum dot PC material is used in the functional layer of the Mini module to improve the luminous effect of different functions of the Mini module. At the same time, the hot-pressed and cured material can better adapt to the working environment of the Mini module, ensuring that its optical and physical properties remain stable during long-term use.

[0045] The perovskite quantum dots prepared in S1 have a particle size of 5-20 nm.

[0046] Specifically, it can reduce surface defects of quantum dots, lower the probability of non-radiative recombination, and can achieve precise adjustment of luminescent color by controlling particle size to meet the mini module's needs for different color displays.

[0047] The thickness of the anti-quenching layer in S2 is 1-10 nm, the inorganic oxide shell layer includes silicon dioxide, aluminum oxide or titanium dioxide, and the organic polymer shell layer includes polystyrene, polymethyl methacrylate or polyvinyl pyrrolidone.

[0048] Specifically, the inorganic oxide shell layer effectively resists environmental erosion with its stable chemical properties and good barrier properties, while the organic polymer shell layer uses its own flexibility and intermolecular forces to tightly wrap the quantum dots and enhance their stability, thereby significantly extending the fluorescence lifetime of the perovskite quantum dots. In the complex working environment of the mini module, it always maintains high-efficiency luminescence, ensuring stable color and long-lasting brightness of the display.

[0049] The anti-quenching treatment specifically comprises the following steps:

[0050] S201, preparing an anti-quenching layer precursor solution by adding an organic solvent to the corresponding material of the inorganic oxide shell layer or the organic polymer shell layer;

[0051] S202, dispersing the perovskite quantum dots in the anti-quenching layer precursor solution while stirring to promote mixing, thereby forming an anti-quenching layer;

[0052] S203, forming an anti-quenching layer on the glass substrate by spin coating, with the spin coating speed set to 3000-5000 rpm and the spin coating time being 30-60 seconds;

[0053] S204. After the anti-quenching layer is formed, if it is an inorganic oxide shell layer, it is cured in an oven at 80-120°C for 2-4 hours; if it is an organic polymer shell layer, it is dried in a vacuum oven at 60-80°C for 6-8 hours.

[0054] Specifically, in step S201, the corresponding material of the inorganic oxide shell layer or the organic polymer shell layer is dissolved in an organic solvent to prepare a uniform precursor solution, which provides a basic material for the subsequent formation of an anti-quenching layer on the surface of the perovskite quantum dots, thereby ensuring the quality and performance of the subsequent film formation;

[0055] The perovskite quantum dots are dispersed in the anti-quenching layer precursor solution by S202 and stirred to make the quantum dots evenly distributed in the solution, so that the anti-quenching material can fully wrap the quantum dots to form a tight bond, providing a uniform dispersion system for subsequent film formation;

[0056] In step S203, an anti-quenching layer is formed on the glass substrate by a spin coating method. The mixed solution is evenly spread on the surface of the glass substrate by utilizing the centrifugal force generated by high-speed rotation. The thickness and uniformity of the anti-quenching layer can be precisely controlled by controlling the spin coating speed and time, thereby improving the mechanical stability and optical performance of the anti-quenching layer.

[0057] Through S204, the inorganic oxide shell layer is cured in an oven, which can cause the inorganic oxide precursor to undergo a chemical reaction to form a stable oxide structure, thereby enhancing the hardness and chemical stability of the anti-quenching layer. For the organic polymer shell layer, it is dried in a vacuum oven to remove the solvent and cross-link the polymer molecules, thereby improving the mechanical strength and stability of the anti-quenching layer. At the same time, it avoids degradation or performance changes of the organic polymer at high temperature, effectively isolates the quantum dots from the influence of external environmental factors, and greatly improves the anti-quenching performance of perovskite quantum dots.

[0058] The organic solvent in S3 includes toluene or chlorobenzene, and the mass concentration of the perovskite quantum dots in the quantum dot dispersion is 1% to 3%.

[0059] Specifically, toluene has excellent solubility and can effectively disperse perovskite quantum dots after anti-fading treatment. Furthermore, its relatively stable chemical properties prevent chemical reactions with the perovskite quantum dots, ensuring the optical properties of the quantum dots are not damaged and allowing the final quantum dot dispersion to be stably used in PC material composites. Chlorobenzene also has excellent solubility for perovskite quantum dots, enabling them to be evenly dispersed in the dispersion, ensuring uniformity and stability when mixed with the PC material. Furthermore, this improves the overall performance of the ultra-high-efficiency perovskite quantum dot PC material, thereby enhancing the luminous efficiency and display quality of the mini module.

[0060] The mixing mass ratio of the quantum dot dispersion and the PC material in S4 is 1:5-1:10.

[0061] Specifically, mixing the quantum dot dispersion and PC material in a mass ratio of 1:5-1:10 can take into account the physical support advantages of the PC material and the luminescence characteristics of the quantum dots, thereby achieving a good balance between optical and physical properties in the materials of the mini module.

[0062] The patterning process comprises the following steps:

[0063] S501, spin coating photoresist on the surface of the preliminary composite PC material;

[0064] S502, then covering the photoresist with a mask having a preset quantum dot pattern, and exposing it to ultraviolet light;

[0065] S503 , after the exposure is completed, developing is performed with a developer for 3 to 5 minutes, and the unexposed photoresist is removed to form a preset quantum dot pattern on the surface of the PC material.

[0066] Specifically, in step S501, photoresist is spin-coated on the surface of the preliminary composite PC material to provide a photosensitive medium for subsequent photolithography pattern transfer. The spin-coating process utilizes the centrifugal force generated by high-speed rotation to evenly spread the photoresist on the surface of the PC material, laying the foundation for subsequent exposure and development steps.

[0067] In step S502 , a mask with a preset quantum dot pattern is placed on the photoresist, and then exposed to ultraviolet light. The pattern on the mask acts as a shield and transmittance. The ultraviolet light shines through the transparent area on the mask onto the photoresist, causing a photochemical reaction in the photoresist, changing its solubility. The mask and the photoresist are aligned, achieving pattern transfer from the mask pattern to the photoresist, ensuring that the photoresist can be accurately exposed according to the pattern on the mask.

[0068] The S503 successfully formed a clear and precise preset quantum dot pattern on the surface of the PC material, meeting the design requirements of the mini module for local light efficiency control. This provides a basis for the subsequent selective distribution and functional realization of quantum dots in these pattern areas, and helps to improve the optical performance and display effect of the mini module.

[0069] The hot pressing temperature in S6 is 180-220° C., the pressure is 5-10 MPa, and the hot pressing time is 10-20 minutes. The Mini module functional layer includes an optical film, a light guide plate, and an encapsulation layer.

[0070] Specifically, hot pressing can put the PC material in a suitable softening state, enhance molecular activity, and make the PC molecular segments more easily move and rearrange, which is conducive to further close integration of the PC material and the internal perovskite quantum dots, reducing interface defects and improving the stability of the composite material.

[0071] High-light-efficiency perovskite quantum dot PC material as an optical film: Due to the high luminous efficiency of perovskite quantum dots and the excellent physical and processing properties of PC material, the optical film made by combining the two can convert and regulate the light emitted by the LED chip in the Mini module, achieving a high color gamut display and improving the color display effect of the picture;

[0072] Ultra-high-efficiency perovskite quantum dot PC material as a light guide: Ultra-high-efficiency perovskite quantum dot PC material can leverage its inherent properties to efficiently guide and distribute light. The high transparency and excellent optical uniformity of the PC material provide a low-loss channel for light propagation within the system. Perovskite quantum dots, with their unique luminescence properties, re-emit and scatter light during propagation, effectively reducing light loss and dark areas. This improves the Mini module's overall luminous efficiency and uniformity, ensuring a clear, bright display with no noticeable differences in brightness and darkness, laying the foundation for high-quality visual effects.

[0073] The ultra-high-efficiency perovskite quantum dot PC material serves as the encapsulation layer, providing comprehensive protection for the Mini module's internal components. The PC material itself possesses excellent mechanical strength and chemical stability, effectively resisting external mechanical impact, dust, moisture, and chemical corrosion, ensuring the physical integrity and chemical stability of the internal components. Furthermore, the perovskite quantum dots impart excellent optical properties to the encapsulation layer, efficiently converting and regulating light emitted by the LED chip, improving luminous efficiency and color purity. They also optimize the light propagation path for more uniform light emission, minimizing light loss and scattering. This ensures the Mini module's reliable operation in complex environments, extends its service life, and significantly enhances its optical performance, providing a strong guarantee for high-quality display effects.

[0074] Example 1

[0075] S1. Synthesis of perovskite quantum dots: Perovskite quantum dots were prepared by hot injection under an inert gas environment. The particle size of the perovskite quantum dots was 10 nm.

[0076] S2. Anti-quenching treatment:

[0077] S201, preparing an anti-quenching layer precursor solution by adding an organic solvent to the corresponding material of the inorganic oxide shell layer or the organic polymer shell layer;

[0078] S202, dispersing the perovskite quantum dots in the anti-quenching layer precursor solution while stirring to promote mixing, thereby forming an anti-quenching layer;

[0079] S203, forming an anti-quenching layer on the glass substrate by spin coating, with the spin coating speed set to 3000-5000 rpm and the spin coating time being 30-60 seconds;

[0080] S204. After the anti-quenching layer is formed, if it is an inorganic oxide shell layer, it is cured in an oven at 80-120° C. for 2-4 hours; if it is an organic polymer shell layer, it is dried in a vacuum oven at 60-80° C. for 6-8 hours, wherein the thickness of the inorganic oxide shell layer is 7 nm;

[0081] S3, quantum dot dispersion: dispersing the anti-quenching treated perovskite quantum dots in a toluene solvent, wherein the mass concentration of the perovskite quantum dots in the quantum dot dispersion is 2%, and stirring to form a uniform quantum dot dispersion;

[0082] S4, PC material composite: mixing the quantum dot dispersion with the PC material, and dispersing the quantum dots in the PC material matrix by solution blending method, wherein the mixing mass ratio of the quantum dot dispersion to the PC material is 1:5;

[0083] S5. Patterning processing:

[0084] S501, spin coating photoresist on the surface of the preliminary composite PC material;

[0085] S502, then covering the photoresist with a mask having a preset quantum dot pattern, and exposing it to ultraviolet light;

[0086] S503, after the exposure is completed, developing with a developer for 4 minutes, and removing the unexposed photoresist to form a preset quantum dot pattern on the surface of the PC material;

[0087] S6. Curing and molding: The patterned PC material is hot-pressed at a temperature of 200°C, a pressure of 7 MPa, and a time of 15 minutes to form an ultra-high light-efficiency perovskite quantum dot PC material, which is then applied to the Mini module optical film by coating.

[0088] Example 2

[0089] Refer to the preparation method of Example 1, except that the ultra-high light efficiency perovskite quantum dot PC material is applied to the Mini module light guide plate by hot pressing.

[0090] Example 3

[0091] Refer to the preparation method of Example 2, except that the ultra-high light efficiency perovskite quantum dot PC material is applied to the packaging layer of the Mini module through mold packaging.

[0092] Among them, in the mini module of ultra-high light efficiency perovskite quantum dot PC material, it can be used as an optical film to efficiently convert and regulate light to achieve high color gamut display. As a light guide plate, it can convert point light source into a uniform surface light source, improving light utilization and light output uniformity. It can act as an encapsulation layer to resist external corrosion and protect internal components. At the same time, it optimizes optical performance and comprehensively improves the display effect and reliability of the mini module.

[0093] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. The application of ultra-high light efficiency perovskite quantum dot PC material in mini module is characterized by: The following steps are involved: S1. Synthesis of perovskite quantum dots: Perovskite quantum dots were prepared by hot injection under an inert gas environment. S2, anti-quenching treatment: coating the surface of the perovskite quantum dots with an anti-quenching layer, wherein the anti-quenching layer includes an inorganic oxide shell layer or an organic polymer shell layer; S3, quantum dot dispersion: dispersing the perovskite quantum dots after anti-quenching treatment in an organic solvent and stirring to form a uniform quantum dot dispersion; S4, PC material compounding: mixing the quantum dot dispersion with the PC material, and dispersing the quantum dots in the PC material matrix through the solution blending method; S5. Patterning: Using photolithography technology, a preset quantum dot pattern is formed on the surface of the PC material; S6, curing and molding: hot pressing the patterned PC material to form ultra-high light efficiency perovskite quantum dot PC material, which is applied to the functional layer of the Mini module; The perovskite quantum dots prepared in S1 have a particle size of 5-20 nm; The thickness of the anti-quenching layer in S2 is 1-10 nm, the inorganic oxide shell layer comprises silicon dioxide, aluminum oxide or titanium dioxide, and the organic polymer shell layer comprises polystyrene, polymethyl methacrylate or polyvinyl pyrrolidone; The anti-quenching treatment specifically comprises the following steps: S201, preparing an anti-quenching layer precursor solution by adding an organic solvent to the corresponding material of the inorganic oxide shell layer or the organic polymer shell layer; S202, dispersing the perovskite quantum dots in the anti-quenching layer precursor solution while stirring to promote mixing, thereby forming an anti-quenching layer; S203, forming an anti-quenching layer on the glass substrate by spin coating, with the spin coating speed set to 3000-5000 rpm and the spin coating time being 30-60 seconds; S204, after the anti-quenching layer is formed, if it is an inorganic oxide shell layer, it is cured in an oven at 80-120° C. for 2-4 hours; if it is an organic polymer shell layer, it is dried in a vacuum oven at 60-80° C. for 6-8 hours; The organic solvent in S3 includes toluene or chlorobenzene, and the mass concentration of perovskite quantum dots in the quantum dot dispersion is 1% to 3%; The patterning process comprises the following steps: S501, spin coating photoresist on the surface of the preliminary composite PC material; S502, then covering the photoresist with a mask having a preset quantum dot pattern, and exposing it to ultraviolet light; S503, after the exposure is completed, developing with a developer for 3 to 5 minutes, and removing the unexposed photoresist to form a preset quantum dot pattern on the surface of the PC material; The hot pressing temperature in S6 is 180-220° C., the pressure is 5-10 MPa, and the hot pressing time is 10-20 minutes. The Mini module functional layer includes an optical film, a light guide plate, and an encapsulation layer.

2. The application of the ultra-high light efficiency perovskite quantum dot PC material in a mini module according to claim 1 is characterized in that: The mixing mass ratio of the quantum dot dispersion and the PC material in S4 is 1:5-1:10.

Images