WO2016111483A1 - 양자점 복합체 및 이를 포함하는 광전소자 - Google Patents
양자점 복합체 및 이를 포함하는 광전소자 Download PDFInfo
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- WO2016111483A1 WO2016111483A1 PCT/KR2015/014151 KR2015014151W WO2016111483A1 WO 2016111483 A1 WO2016111483 A1 WO 2016111483A1 KR 2015014151 W KR2015014151 W KR 2015014151W WO 2016111483 A1 WO2016111483 A1 WO 2016111483A1
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- Prior art keywords
- quantum dot
- scattering particles
- dot composite
- matrix layer
- light
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- 239000002096 quantum dot Substances 0.000 title claims abstract description 105
- 239000002131 composite material Substances 0.000 title claims abstract description 46
- 239000002245 particle Substances 0.000 claims abstract description 60
- 239000011159 matrix material Substances 0.000 claims abstract description 35
- 239000000203 mixture Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 12
- 150000001875 compounds Chemical class 0.000 claims description 11
- 239000004054 semiconductor nanocrystal Substances 0.000 claims description 11
- 239000002159 nanocrystal Substances 0.000 claims description 10
- 229920000642 polymer Polymers 0.000 claims description 8
- 239000011521 glass Substances 0.000 claims description 6
- 239000002952 polymeric resin Substances 0.000 claims description 3
- 229920003002 synthetic resin Polymers 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 abstract description 8
- 230000005693 optoelectronics Effects 0.000 description 15
- 238000006243 chemical reaction Methods 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 8
- 229920005989 resin Polymers 0.000 description 8
- 239000011347 resin Substances 0.000 description 8
- 239000000758 substrate Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 239000013078 crystal Substances 0.000 description 4
- 238000000295 emission spectrum Methods 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- UHYPYGJEEGLRJD-UHFFFAOYSA-N cadmium(2+);selenium(2-) Chemical compound [Se-2].[Cd+2] UHYPYGJEEGLRJD-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000001451 molecular beam epitaxy Methods 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 238000009877 rendering Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 239000011258 core-shell material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000005281 excited state Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 230000015654 memory Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000879 optical micrograph Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
- H01L33/501—Wavelength conversion elements characterised by the materials, e.g. binder
- H01L33/502—Wavelength conversion materials
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
- C09K11/025—Use of particular materials as binders, particle coatings or suspension media therefor non-luminescent particle coatings or suspension media
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0232—Optical elements or arrangements associated with the device
- H01L31/02322—Optical elements or arrangements associated with the device comprising luminescent members, e.g. fluorescent sheets upon the device
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/58—Optical field-shaping elements
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/12—Light sources with substantially two-dimensional radiating surfaces
- H05B33/20—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of the material in which the electroluminescent material is embedded
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y20/00—Nanooptics, e.g. quantum optics or photonic crystals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2933/00—Details relating to devices covered by the group H01L33/00 but not provided for in its subgroups
- H01L2933/0083—Periodic patterns for optical field-shaping in or on the semiconductor body or semiconductor body package, e.g. photonic bandgap structures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2933/00—Details relating to devices covered by the group H01L33/00 but not provided for in its subgroups
- H01L2933/0091—Scattering means in or on the semiconductor body or semiconductor body package
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S977/00—Nanotechnology
- Y10S977/70—Nanostructure
- Y10S977/773—Nanoparticle, i.e. structure having three dimensions of 100 nm or less
- Y10S977/774—Exhibiting three-dimensional carrier confinement, e.g. quantum dots
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S977/00—Nanotechnology
- Y10S977/70—Nanostructure
- Y10S977/778—Nanostructure within specified host or matrix material, e.g. nanocomposite films
- Y10S977/783—Organic host/matrix, e.g. lipid
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S977/00—Nanotechnology
- Y10S977/902—Specified use of nanostructure
- Y10S977/932—Specified use of nanostructure for electronic or optoelectronic application
- Y10S977/949—Radiation emitter using nanostructure
- Y10S977/95—Electromagnetic energy
Definitions
- the present invention relates to a quantum dot composite and an optoelectronic device including the same, and more particularly, to a quantum dot composite and an optoelectronic device including the same, which have excellent optical properties and can improve light efficiency of the optoelectronic device.
- a quantum dot is a nanocrystal of a semiconductor material having a diameter of about 10 nm or less, and exhibits a quantum confinement effect.
- quantum dots generate light in a narrower wavelength band than ordinary phosphors.
- luminescence of the quantum dots is generated while the electrons in the excited state are transferred from the conduction band to the same material, but the same material also exhibits a characteristic of varying in wavelength depending on particle size.
- the smaller the size of the quantum dot emits light of a shorter wavelength it is possible to obtain the light of the desired wavelength region by adjusting the size.
- gaseous vapor deposition such as metal organic chemical vapor deposition (MOCVD) or molecular beam epitaxy (MBE), and a chemical wet method in which a precursor is added to an organic solvent to grow crystals are used.
- MOCVD metal organic chemical vapor deposition
- MBE molecular beam epitaxy
- the chemical wet method is a method in which the organic solvent is naturally coordinated to the crystal surface of the quantum dots when the crystal grows, and serves as a dispersant to control the growth of the crystal, which is simpler and cheaper than vapor deposition such as MOCVD or MBE.
- the process also has the advantage of controlling the uniformity of the size and shape of the nanocrystals.
- the quantum dots produced by the above method are characterized by biological images, photovoltaic devices, photoluminescent devices, memories, and the like due to unique physical properties such as nanometer scale size, scalable optical properties, high light stability, and broad absorption spectrum. It is used in various fields such as a display device.
- these quantum dots are mixed with a conventional polymer (polymer) to form a sheet (sheet) to apply to a variety of fields.
- a scattering agent such as titanium oxide, aluminum oxide, barium titanate, and silicon dioxide was added, but there was a limit in improving the light efficiency only by adding the scattering agent as described above.
- an object of the present invention is to provide a quantum dot composite and an optoelectronic device comprising the same having excellent optical properties, which can improve the optical efficiency of the optoelectronic device will be.
- the matrix layer A plurality of quantum dots dispersed within the matrix layer; And a plurality of scattering particles dispersed in the matrix layer in a form disposed between the plurality of quantum dots, wherein the scattering particles have hollows formed therein to exhibit multiple refractive indices. do.
- the scattering particles may be made of glass particles or polymer particles having a hollow formed therein.
- the plurality of scattering particles may be included in the matrix layer in a ratio of 0.04 ⁇ 10wt% relative to the content of the matrix layer and the plurality of quantum dots.
- the scattering particles may be larger in size than the quantum dots.
- the size of the scattering particles may be 3 ⁇ 100 ⁇ m.
- the matrix layer may be made of a polymer resin.
- the quantum dot may include any one nanocrystal of Si-based nanocrystals, II-VI compound semiconductor nanocrystals, III-V compound semiconductor nanocrystals, IV-VI compound semiconductor nanocrystals, and mixtures thereof. .
- the present invention provides a photovoltaic device comprising the above quantum dot composite on the path from which light is emitted or incident.
- a space in which light emitted from the quantum dots can be sufficiently emitted between a plurality of quantum dots dispersed inside the matrix layer is incident on the light emitted from the quantum dots, the light emitted from the photoelectric device or the photoelectric device.
- the light efficiency of the optoelectronic device can be improved by having a plurality of scattering particles having multiple refractive indices dispersed in the matrix layer and having hollows therein.
- the quantum dot composite according to the present invention when applied as a color conversion substrate of a light emitting diode, the color conversion efficiency and luminance of the light emitting diode can be significantly improved compared to the conventional one, and thus, the amount of quantum dots used can be reduced.
- FIG. 1 is a schematic diagram showing a quantum dot composite according to an embodiment of the present invention.
- 2 and 3 are optical micrographs of the quantum dot composite according to an embodiment of the present invention.
- 4 to 8 are light emission spectra of the quantum dot composite according to Examples 1 to 5 of the present invention.
- the quantum dot composite 100 is applied to an optoelectronic device, and serves to improve its light efficiency.
- the optoelectronic device is formed of a photoelectric transmitter such as a light emitting diode or an organic light emitting diode
- the quantum dot composite 100 is disposed on a path through which light generated from the optoelectronic device is emitted, and passes the light passing therethrough in various paths.
- the quantum dot composite 100 is disposed on the path of the light incident to the optoelectronic device, the light passing through it in various paths
- the quantum dot composite 100 is disposed on the path of the light incident to the optoelectronic device, the light passing through it in various paths
- the quantum dot composite 100 may be formed in the form of a sheet or a substrate, the quantum dot composite 100 is a member disposed on the light emitting diode to convert a part of the light emitted from the light emitting diode color conversion Can be used.
- a light emitting diode package including a quantum dot composite 100 and a light emitting diode according to an exemplary embodiment of the present invention may include, for example, blue light emitted from a blue light emitting diode and light converted by the quantum dot composite 100. The mixed white light is emitted to the outside.
- the light emitting diode may include a main body and a light emitting diode chip.
- the main body is a structure having an opening having a predetermined shape, and provides a structural space in which the LED chip is mounted.
- the main body is provided with a wire and a lead frame for electrically connecting the light emitting diode chip to an external power source.
- the light emitting diode chip is a light source that emits light by an electric current applied from the outside, and is mounted on the main body, connected to an external power source through a wire and a lead frame, and provides an n-type semiconductor layer and holes for providing electrons. It may be made of a forward junction of the p-type semiconductor layer to provide a (hole).
- the quantum dot composite 100 used as the optical functional member of various photoelectric devices, in particular, the color conversion substrate of the light emitting device may include a matrix layer 110, a plurality of quantum dots 120, and a plurality of quantum dots 120. It is formed including the scattering particles 130.
- the matrix layer 110 serves to protect the plurality of quantum dots 120 and the plurality of scattering particles 130 dispersed therein from an external environment such as oxygen or moisture.
- the matrix layer 110 serves to maintain a structure in which a plurality of quantum dots 120 are arranged in a dispersed manner.
- the matrix layer 110 may be processed or molded in the form of a sheet or a substrate to provide a movement path of light emitted or received.
- the matrix layer 110 may be made of a thermal or UV curable polymer resin.
- the plurality of quantum dots 120 are distributed inside the matrix layer 110. In this case, the plurality of quantum dots 120 is protected from the external environment by the matrix layer 110, and its dispersibility is maintained.
- the quantum dot 120 is a nano crystal of a semiconductor material having a diameter of about 1 to 10 nm, and is a material exhibiting a quantum confinement effect.
- the quantum dot 120 converts the wavelength of light emitted from the light emitting diode to generate wavelength converted light, that is, fluorescence.
- the quantum dot composite 100 according to the embodiment of the present invention is applied as a color conversion substrate of a blue light emitting diode, for quantum dot 120 to realize white light through mixing with blue light emitted from the blue light emitting diode, Fluorescence is generated to wavelength convert a portion of the light emitted from the blue light emitting diode into yellow.
- the quantum dot 120 may include any one of Si-based nanocrystals, group II-VI compound semiconductor nanocrystals, group III-V compound semiconductor nanocrystals, group IV-VI compound semiconductor nanocrystals, and a mixture thereof. Can be.
- CdSe may be used as the II-VI compound semiconductor nanocrystal
- InP may be used as the quantum dot 120 as the III-V compound semiconductor nanocrystal, but in the embodiment of the present invention, the quantum dot 120 may be CdSe. It is not specifically limited to InP.
- the plurality of scattering particles 130 are dispersed in the matrix layer 110.
- the plurality of scattering particles 130 are dispersed in the matrix layer 110 in a form disposed between the plurality of quantum dots 120.
- the scattering particles 130 have a larger size than the quantum dot 120.
- the scattering particles 130 may be formed to have a size of 3 ⁇ 100 ⁇ m larger than the quantum dot 120 is a nanocrystal.
- the size of the scattering particles 130 may be defined as the diameter of the scattering particles 130 having a spherical shape.
- a space in which the light emitted from the quantum dots 120 may be sufficiently emitted may be formed in the matrix layer 110. Since it is made between the neighboring quantum dots 120, it is possible to achieve excellent color conversion efficiency and color rendering index (CRI).
- CRI color conversion efficiency and color rendering index
- the optical properties such as color conversion efficiency and color rendering index of the quantum dot composite 100 through the scattering particles 130 is excellent, it is also possible to reduce the use of the quantum dot 120 than the conventional Become.
- the scattering particles 130 shows a multiple refractive index.
- the scattering particles 130 may be made of glass particles or polymer particles having a hollow 131 formed therein.
- the hollow 131 may be formed in the shape of occupying approximately 80% by volume relative to the total volume of the scattering particles 130 in the scattering particles 130. That is, the scattering particles 130 may be formed of a core made of a hollow 131 occupying approximately 80% by volume and a shell structure made of glass or polymer surrounding the core.
- the scattering particles 130 are made of glass particles or polymer particles having a core-shell structure having a refractive index difference from each other, for example, the path of light generated from the light emitting diode or the light emitted from the quantum dot 120 is complicated. By diversifying, the efficiency of extracting the emitted light to the outside, that is, the light efficiency of the light emitting diode can be improved.
- the incident light may be scattered through the scattering particles 130 to increase the amount of light absorbed into the light absorbing layer of the photovoltaic cell, thereby improving the light efficiency of the photovoltaic cell.
- the plurality of scattering particles 130 may be included in the matrix layer 110 at a rate of 0.04 to 10 wt% relative to the content of the matrix layer 110 and the plurality of quantum dots 120 dispersed therein.
- the dispersion content of the scattering particles 130 is less than 0.04wt%, the effect of improving the color conversion efficiency through this little or no, the utility having the scattering particles 130 is lost.
- the dispersion content of the scattering particles 130 exceeds 10wt%, the luminance of the optoelectronic device, for example, a light emitting diode, employing the scattering particles 130 is lowered.
- the quantum dot composite was prepared by mixing. Accordingly, the scattering particles form a structure that is dispersed in the mixture forming the matrix layer at 3.08wt% relative to the content of the quantum dot and the UV resin.
- a quantum dot composite was prepared by mixing the first mixture and the second mixture of Example 1 in a ratio of 1: 0.4. Accordingly, the scattering particles form a structure that is dispersed in the mixture forming the matrix layer at 5.19wt% relative to the content of the quantum dot and the UV resin.
- a quantum dot composite was prepared by mixing the first mixture and the second mixture of Example 1 in a ratio of 1: 0.6. Accordingly, the scattering particles form a structure that is dispersed in the mixture forming the matrix layer at 6.74wt% relative to the content of the quantum dot and the UV resin.
- a quantum dot composite was prepared by mixing the first mixture and the second mixture of Example 1 in a ratio of 1: 0.8. Accordingly, the scattering particles form a structure dispersed in the mixture forming the matrix layer to 7.92wt% relative to the content of the quantum dot and the UV resin.
- a quantum dot composite was prepared by mixing the first mixture and the second mixture of Example 1 in a ratio of 1: 1. Accordingly, the scattering particles form a structure that is dispersed in the mixture forming the matrix layer to 8.85wt% relative to the content of the quantum dot and the UV resin.
- a quantum dot composite was prepared from the first mixture of Example 1. That is, in Comparative Example 1, a hollow was formed therein, thereby preparing a quantum dot composite having no scattering particles having multiple refractive indices.
- Example 1 0.2160 0.2024 10641 3.08
- Example 2 0.2282 0.2368 11058 5.19
- Example 3 0.2409 0.2569 11368 6.74
- Example 4 0.2494 0.2659 11062 7.92
- Example 5 0.2393 0.2574 11266 8.85 Comparative Example 1 0.1748 0.1117 7586 -
- Table 1 shows the color coordinates and the luminance change after applying the quantum dot composite according to Examples 1 to 5 and Comparative Example 1 of the present invention to a light emitting diode.
- 4 to 8 show emission spectra of the quantum dot composites according to Examples 1 to 5
- FIG. 9 shows the emission spectra of the quantum dot composites according to Comparative Example 1.
- the quantum dot composite 100 is disposed between the plurality of quantum dots 120 and the quantum dots 120 dispersed in the matrix layer 110, and thus, from the quantum dots 120.
- a space is formed between the quantum dots 120 and scattering particles 130 having multiple refractive indices for scattering the emitted light through various paths.
- the quantum dot composite 100 according to the embodiment of the present invention can improve the light efficiency of the applied optoelectronic device.
- the quantum dot composite 100 according to the embodiment of the present invention when applied as a color conversion substrate of the light emitting diode, the color conversion efficiency of the light emitting diode and the conventional quantum dot composite having no scattering particles 130 having multiple refractive index and The luminance can be greatly improved, and accordingly, the amount of quantum dots 120 used can be reduced.
Abstract
Description
x | y | 휘도 | 산란입자(wt%) | |
실시 예1 | 0.2160 | 0.2024 | 10641 | 3.08 |
실시 예2 | 0.2282 | 0.2368 | 11058 | 5.19 |
실시 예3 | 0.2409 | 0.2569 | 11368 | 6.74 |
실시 예4 | 0.2494 | 0.2659 | 11062 | 7.92 |
실시 예5 | 0.2393 | 0.2574 | 11266 | 8.85 |
비교 예1 | 0.1748 | 0.1117 | 7586 | - |
Claims (8)
- 매트릭스 층;상기 매트릭스 층 내부에 분산되어 있는 다수의 양자점; 및상기 다수의 양자점 사이에 배치되는 형태로 상기 매트릭스 층 내부에 분산되어 있는 다수의 산란입자;를 포함하되,상기 산란입자는 내부에 중공이 형성되어 있어 다중 굴절률을 나타내는 것을 특징으로 하는 양자점 복합체.
- 제1항에 있어서,상기 산란입자는 내부에 중공이 형성되어 있는 유리입자 또는 폴리머입자로 이루어진 것을 특징으로 하는 양자점 복합체.
- 제1항에 있어서,상기 다수의 산란입자는 상기 매트릭스 층 내부에 상기 매트릭스 층과 상기 다수의 양자점의 함량 대비 0.04~10wt% 비율로 포함되어 있는 것을 특징으로 하는 양자점 복합체.
- 제1항에 있어서,상기 산란입자는 상기 양자점보다 크기가 큰 것을 특징으로 하는 양자점 복합체.
- 제4항에 있어서,상기 산란입자의 크기는 3~100㎛인 것을 특징으로 하는 양자점 복합체.
- 제1항에 있어서,상기 매트릭스 층은 고분자 수지로 이루어진 것을 특징으로 하는 양자점 복합체.
- 제1항에 있어서,상기 양자점은 Si계 나노결정, Ⅱ-Ⅵ족계 화합물 반도체 나노결정, Ⅲ-Ⅴ족계 화합물 반도체 나노결정, Ⅳ-Ⅵ족계 화합물 반도체 나노결정 및 이들의 혼합물 중 어느 하나의 나노 결정을 포함하는 것을 특징으로 하는 양자점 복합체.
- 제1항 내지 제7항 중 어느 한 항에 따른 양자점 복합체를 광이 출사 또는 입사되는 경로 상에 구비하는 것을 특징으로 하는 광전소자.
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CN201580072572.3A CN107112398A (zh) | 2015-01-06 | 2015-12-23 | 量子点复合物和包括其的光电器件 |
US15/541,949 US20170362502A1 (en) | 2015-01-06 | 2015-12-23 | Quantum dot composite and photoelectric device comprising same |
JP2017535761A JP2018510367A (ja) | 2015-01-06 | 2015-12-23 | 量子ドット複合体及びこれを含む光電素子 |
EP15877203.8A EP3243887A4 (en) | 2015-01-06 | 2015-12-23 | Quantum dot composite and photoelectric device comprising same |
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KR1020150001053A KR101777596B1 (ko) | 2015-01-06 | 2015-01-06 | 양자점 복합체 및 이를 포함하는 광전소자 |
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EP (1) | EP3243887A4 (ko) |
JP (1) | JP2018510367A (ko) |
KR (1) | KR101777596B1 (ko) |
CN (1) | CN107112398A (ko) |
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Also Published As
Publication number | Publication date |
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TWI589020B (zh) | 2017-06-21 |
US20170362502A1 (en) | 2017-12-21 |
KR101777596B1 (ko) | 2017-09-13 |
JP2018510367A (ja) | 2018-04-12 |
EP3243887A4 (en) | 2018-08-15 |
EP3243887A1 (en) | 2017-11-15 |
KR20160084619A (ko) | 2016-07-14 |
CN107112398A (zh) | 2017-08-29 |
TW201633558A (zh) | 2016-09-16 |
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