KR101782107B1 - Functionally Graded Composites for Energy Conversion and Process for Preparing the Same - Google Patents
Functionally Graded Composites for Energy Conversion and Process for Preparing the Same Download PDFInfo
- Publication number
- KR101782107B1 KR101782107B1 KR1020150122003A KR20150122003A KR101782107B1 KR 101782107 B1 KR101782107 B1 KR 101782107B1 KR 1020150122003 A KR1020150122003 A KR 1020150122003A KR 20150122003 A KR20150122003 A KR 20150122003A KR 101782107 B1 KR101782107 B1 KR 101782107B1
- Authority
- KR
- South Korea
- Prior art keywords
- layer
- phosphor
- powder
- metal
- mixed
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 title claims description 37
- 239000002131 composite material Substances 0.000 title claims description 21
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 205
- 229910052751 metal Inorganic materials 0.000 claims abstract description 195
- 239000002184 metal Substances 0.000 claims abstract description 195
- 239000000843 powder Substances 0.000 claims abstract description 190
- 239000011812 mixed powder Substances 0.000 claims abstract description 35
- 230000032798 delamination Effects 0.000 claims abstract description 10
- 239000010410 layer Substances 0.000 claims description 315
- 239000010949 copper Substances 0.000 claims description 43
- 229910052802 copper Inorganic materials 0.000 claims description 42
- 239000000203 mixture Substances 0.000 claims description 35
- 238000005245 sintering Methods 0.000 claims description 35
- 238000000034 method Methods 0.000 claims description 20
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 15
- 150000001875 compounds Chemical class 0.000 claims description 15
- 230000035939 shock Effects 0.000 claims description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 11
- 239000010936 titanium Substances 0.000 claims description 8
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 7
- 239000004065 semiconductor Substances 0.000 claims description 7
- 229910052719 titanium Inorganic materials 0.000 claims description 7
- 239000007791 liquid phase Substances 0.000 claims description 6
- 239000011159 matrix material Substances 0.000 claims description 6
- 239000007790 solid phase Substances 0.000 claims description 6
- 239000002356 single layer Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 230000000116 mitigating effect Effects 0.000 claims 4
- 230000000704 physical effect Effects 0.000 abstract description 5
- 239000000463 material Substances 0.000 description 8
- 238000005401 electroluminescence Methods 0.000 description 4
- 239000011229 interlayer Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 3
- 238000005424 photoluminescence Methods 0.000 description 3
- 238000000103 photoluminescence spectrum Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000002923 metal particle Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000027756 respiratory electron transport chain Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000000859 sublimation Methods 0.000 description 1
- 230000008022 sublimation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- 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
- H05B33/02—Details
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K2/00—Non-electric light sources using luminescence; Light sources using electrochemiluminescence
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/90—Methods of manufacture
-
- 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
- H01L31/08—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 in which radiation controls flow of current through the device, e.g. photoresistors
- H01L31/09—Devices sensitive to infrared, visible or ultraviolet radiation
-
- 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
-
- 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
- H05B33/10—Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
Abstract
The present invention forms a bonding layer composed of a mixed powder of a metal powder and a phosphor powder between a metal layer and a phosphor layer to gradually change the physical properties between the metal and the phosphor to thereby suppress the delamination phenomenon, And a method of manufacturing the same. The inclined functional complex according to the present invention can be effectively used for a field emission display, an electroluminescent display, and the like.
Description
More particularly, the present invention relates to a method for producing an energy conversion tilting functional composite and a method for producing the same, and more particularly, To an energy conversion gradient functional composite having excellent thermal stability and electrical stability as well as suppressing delamination, and a process for producing the same.
Functionally Graded Materials (FGM) refers to materials whose properties vary continuously from one side to the other. The graded functional material can secure various properties of the material through gradual changes of desired physical properties and mitigates the concentration of residual stress due to difference in thermal expansion coefficient compared with the conventional two-layer structure material, Thermal fatigue characteristics, and the like, it is recognized as a promising technology in applications where thermal and mechanical properties are required.
Phosphor excites the electrons inside the phosphor by external energy such as photon, electric field, accelerated electron and pressure to emit light in the visible region Luminescence) is an energy conversion material. When the phosphor is applied to a field emission display (FED), electrons are charged on the surface of the phosphor and the luminous efficiency of the phosphor is lowered . In addition, when the phosphor is applied to an electroluminescent display (ELD), coating of a metal electrode is required at the upper and lower portions of the phosphor layer.
Various methods such as coating a functional material on the surface of a phosphor and a phosphor layer have been attempted in order to overcome the problems caused by the above-mentioned phosphors. However, such a coating method is not limited to the above-mentioned field emission type display and electroluminescence type display It is difficult to solve fundamental problems such as thermal shock generated during long-time driving and interlayer peeling due to thermal fatigue, and none of the conventional techniques suggest a solution for solving such a problem.
As a result of intensive studies to solve the above problems in the energy conversion gradient functional composite and the method of manufacturing the same according to the present invention, it has been found that a bonding layer composed of a mixed powder of a metal powder and a phosphor powder is formed between a metal layer and a phosphor layer, It is possible not only to suppress the phenomenon of delamination due to thermal shock and thermal fatigue caused by long-time driving in the field emission type display and the electroluminescence type display using phosphors and phosphors, The present inventors have found that an inclined-function complex having improved thermal stability and electrical stability can be prepared, and the present invention has been accomplished.
Accordingly, an object of the present invention is to provide an energy conversion gradient functional composite having excellent thermal stability and electrical stability as well as suppressing interlayer peeling, and a method for producing the same.
On the other hand,
A metal layer made of a metal powder;
A phosphor layer made of a phosphor powder; And
A bonding layer composed of a plurality of mixed layers composed of a mixed powder of a metal powder and a phosphor powder is formed between the metal layer and the phosphor layer,
Wherein each layer of the plurality of mixed layers is composed of mixed powders of a metal powder and a phosphor powder having different composition ratios,
The content of the metal powder in the mixed layer adjacent to the metal layer is increased and the content of the phosphor powder in the mixed layer adjacent to the phosphor layer is increased so that the content of the metal powder and the phosphor powder in each layer of the mixed layer are continuously To < RTI ID = 0.0 > a < / RTI >
In one embodiment of the present invention, the metal powder may be any one selected from the group consisting of copper, aluminum, nickel and titanium.
In one embodiment of the present invention, the phosphor powder may be any one selected from the group consisting of a compound containing a semiconductor compound of a
In one embodiment of the present invention, the composition ratio of each layer of the plurality of mixed layers may vary from 95: 5 to 1:99 in the volume ratio of the metal powder and the phosphor powder from the metal layer to the phosphor layer.
On the other hand,
A metal layer made of a metal powder;
A phosphor layer made of a phosphor powder; And
A single-layer bonding layer made of a mixed powder of a metal powder and a phosphor powder is formed between the metal layer and the phosphor layer,
The amount of the metal powder in the region adjacent to the metal layer in the bonding layer is large and the content of the phosphor powder in the region adjacent to the phosphor layer is large so that the content of the metal powder and the phosphor powder in the bonding layer continuously changes Conversion gradient functional composite.
In one embodiment of the present invention, the metal powder may be any one selected from the group consisting of copper, aluminum, nickel and titanium.
In one embodiment of the present invention, the phosphor powder may be any one selected from the group consisting of a compound containing a semiconductor compound of a
In one embodiment of the present invention, the bonding layer continuously changes the content of the metal powder from the metal layer to the phosphor layer to 95 to 1% by volume based on the total amount of the mixed powder of the metal powder and the phosphor powder, The content may vary continuously from 5 to 99% by volume.
On the other hand,
The present invention provides a photoelectric conversion element in which an ultraviolet-A region (320-400 nm) incident from one side is absorbed by the energy-conversion-tilting functional complex to cause a current change by the incident light.
On the other hand,
And a voltage applied from one side is applied to the energy conversion tilting function complex, and the voltage is converted into light to form light.
On the other hand,
Forming a metal layer of a metal powder;
Preparing a plurality of mixed powders by uniformly mixing metal powders and phosphor powders at different composition ratios;
The composition ratio of the mixed powder is larger on the metal layer than on the metal layer and the content of the phosphor powder is larger as the layer is separated from the metal layer so that the composition ratio of the mixed powder is continuously changed Sequentially stacking the mixed powders so as to form a bonding layer composed of a plurality of mixed layers;
Forming a phosphor layer made of a phosphor powder on the bonding layer; And
And sintering the metal layer, the bonding layer, and the phosphor layer.
In one embodiment of the present invention, the metal powder may be any one selected from the group consisting of copper, aluminum, nickel and titanium.
In one embodiment of the present invention, the phosphor powder may be any one selected from the group consisting of a compound containing a semiconductor compound of a
In one embodiment of the present invention, the composition ratio of each layer of the plurality of mixed layers may vary from 95: 5 to 1:99 in the volume ratio of the metal powder and the phosphor powder from the metal layer to the phosphor layer.
In one embodiment of the present invention, the solid phase sintering method may be used so that the composition ratio of each layer of the mixed layer does not change during the sintering process.
In an embodiment of the present invention, the mixed layer adjacent to the metal layer has a greater metal powder content, and the mixed layer adjacent to the phosphor layer has a larger phosphor powder content, The liquid phase sintering method can be used so that the content of the powder and the phosphor powder continuously changes.
On the other hand,
Forming a metal layer of a metal powder;
And a phosphor layer formed on the metal layer, wherein the metal layer has a large amount of metal powder and a region spaced apart from the metal layer has a larger content of the phosphor powder, ;
Forming a phosphor layer made of a phosphor powder on the bonding layer; And
And sintering the metal layer, the bonding layer, and the phosphor layer.
In one embodiment of the present invention, the metal powder may be any one selected from the group consisting of copper, aluminum, nickel and titanium.
In one embodiment of the present invention, the phosphor powder may be any one selected from the group consisting of a compound containing a semiconductor compound of a
In one embodiment of the present invention, the bonding layer continuously changes the content of the metal powder from the metal layer to the phosphor layer to 95 to 1% by volume based on the total amount of the mixed powder of the metal powder and the phosphor powder, The content may vary continuously from 5 to 99% by volume.
In one embodiment of the present invention, the solid phase sintering method can be used so that the composition ratio of the bonding layer does not change during sintering.
In the embodiment of the present invention, the bonding layer has a large amount of metal powder in the region adjacent to the metal layer, and the phosphor powder content in the region adjacent to the phosphor layer is large, so that the metal powder of the bonding layer and the phosphor powder The liquid phase sintering method can be used so that the content of the sintering agent continuously varies.
The energy conversion tilting functional complex according to the present invention can form a bonding layer composed of a mixed powder of a metal powder and a phosphor powder between a metal layer and a phosphor layer to gradually change physical properties between the metal and the phosphor, But also the concentration of inter-layer residual stress due to the difference in thermal expansion coefficient is mitigated, so that the thermal shock characteristic and the thermal fatigue characteristic can be improved. In addition, this suppresses the delamination phenomenon and is excellent in thermal stability and electrical stability. Therefore, it can be effectively used for a field emission type display using an inclined function complex and an electroluminescence type display.
1 is a cross-sectional view showing an energy conversion tilting functional complex according to an embodiment of the present invention.
2 is a cross-sectional view showing an energy conversion tilting functional complex according to an embodiment of the present invention.
3 is a view showing a copper-ZnS: Cu, Cl tilt function complex according to an embodiment of the present invention.
FIG. 4 is a view showing a state in which a phosphor layer of copper-ZnS: Cu, Cl tilting functional complex according to an embodiment of the present invention emits light under a 365 nm ultraviolet lamp.
5 is a graph showing the photoluminescence intensity of copper-ZnS: Cu, Cl tilted function complex and ZnS: Cu, Cl phosphor powder according to an embodiment of the present invention.
FIG. 6 is a spectrum showing a comparison of photoluminescence intensity of ZnS: Cu, Cl phosphor powder with temperature change.
FIG. 7 is a graph showing a comparison of photoluminescence intensity of copper-ZnS: Cu, Cl tilted functional complex according to an embodiment of the present invention, according to temperature change.
FIG. 8 is a graph showing current-voltage curves (IV curves) when UV light of 365 nm is irradiated to a copper-ZnS: Cu, Cl gradient functional composite according to an embodiment of the present invention and when the UV is not irradiated.
Hereinafter, the present invention will be described in more detail.
1 is a cross-sectional view showing an energy conversion tilting functional complex according to an embodiment of the present invention. Referring to FIG. 1, an energy conversion
A
A
A
Each layer of the plurality of
The amount of the metal powder in the
The thickness of the energy conversion tilting functional complex may be adjusted according to the number of the
In one embodiment of the present invention, the composition ratio of each layer of the plurality of mixed layers may vary from 95: 5 to 1:99 in the volume ratio of the metal powder and the phosphor powder from the metal layer to the phosphor layer. If the composition ratio of the metal and the phosphor powder does not satisfy the above range, the bonding between the bonding layer, the metal layer and the phosphor layer may not be performed well and delamination may occur.
In the energy conversion gradient functional composite of the present invention, the content and the composition ratio of the metal powder and the phosphor powder contained in the plurality of
In the energy conversion tilting functional composite of the present invention, a mixed layer composed of a metal powder and a mixed powder of a phosphor powder is laminated between the metal layer and the phosphor layer so that the composition ratios of the respective layers are different from each other, (See FIG. 1). In the single layer, the content of the metal powder is large in the region adjacent to the metal layer, and the content of the phosphor powder in the region adjacent to the phosphor layer is large, and the content of the metal powder and the phosphor powder continuously changes A bonding layer having an inclined content of the powders can be formed (see FIG. 2).
2 is a cross-sectional view showing an energy conversion tilting functional complex according to an embodiment of the present invention. Referring to FIG. 2, the energy conversion gradient functional complex 100 according to an embodiment of the present invention includes:
A
A
A single-
The amount of the metal powder in the region adjacent to the
In one embodiment of the present invention, the content of the metal powder continuously changes from 95 to 1% by volume with respect to the total amount of mixed powder of the metal powder and the phosphor powder from the metal layer to the phosphor layer, The content of the phosphor powder may continuously vary from 5 to 99% by volume. If the content of the metal and the phosphor powder does not satisfy the above range, the bonding between the bonding layer, the metal layer and the phosphor layer may not be performed well and interlayer peeling may occur.
The content of the metal powder and the phosphor powder in the region adjacent to the metal layer and the region adjacent to the phosphor layer are different from each other in the
In one embodiment of the present invention, the metal powder may be any one selected from the group consisting of copper (Cu), aluminum (Al), nickel (Ni), and titanium (Ti).
In one embodiment of the present invention, the phosphor powder may be any one selected from the group consisting of a compound containing a semiconductor compound of a
The diameter of the metal powder and the phosphor powder may be 10 nm or more and 100 m or less.
In one embodiment of the present invention, the diameters of the metal powder and the phosphor powder may be the same or different.
When the diameter of the metal powder is larger than the diameter of the phosphor powder, the phosphor particles can be aligned at the interface of the metal particles.
At this time, electron movement between the
When the diameter of the metal powder is smaller than the diameter of the phosphor powder, the metal particles can be aligned at the interface of the phosphor particles.
At this time, electron transfer between the
Therefore, by controlling the diameters of the metal powder and the phosphor powder, the movement of electrons can be controlled.
The energy conversion gradient functional composite of the present invention can be effectively used for a photoelectric conversion element using a phosphor, a field emission type display, an electroluminescence type display, and the like.
The energy conversion gradient functional complex according to the present invention excites and excites electrons in the phosphor by external energy, that is, energy such as photon, electric field, accelerated electron, and pressure. Since it has characteristics as an inorganic light emitting material that emits light through transition, it can convert high energy to low energy (Down Conversion) or convert low energy into high energy (Up Conversion).
Therefore, one embodiment of the present invention relates to a photoelectric conversion element which causes a change in current by the incident light while being absorbed by the energy-converting and grading-function complex incident on the ultraviolet-A region (320-400 nm) .
An embodiment of the present invention relates to an electroluminescent device in which a voltage applied from one side is applied to the energy conversion tilting function complex and the voltage is converted into light to form light.
One embodiment of the present invention relates to a method for producing an energy conversion gradient functional composite,
Forming a metal layer of a metal powder;
Preparing a plurality of mixed powders by uniformly mixing metal powders and phosphor powders at different composition ratios;
The composition ratio of the mixed powder is larger on the metal layer than on the metal layer and the content of the phosphor powder is larger as the layer is separated from the metal layer so that the composition ratio of the mixed powder is continuously changed Sequentially stacking the mixed powders so as to form a bonding layer composed of a plurality of mixed layers;
Forming a phosphor layer made of a phosphor powder on the bonding layer; And
And sintering the metal layer, the bonding layer, and the phosphor layer.
In one embodiment of the present invention, the composition ratio of each layer of the plurality of mixed layers may vary from 95: 5 to 1:99 in the volume ratio of the metal powder and the phosphor powder from the metal layer to the phosphor layer.
In one embodiment of the present invention, the solid-phase sintering method can be used so that the composition ratio of each layer of the mixed layer does not change during sintering.
In an embodiment of the present invention, the mixed layer adjacent to the metal layer has a greater metal powder content, and the mixed layer adjacent to the phosphor layer has a larger phosphor powder content, The liquid phase sintering method can be used so that the content of the powder and the phosphor powder continuously changes.
One embodiment of the present invention relates to a method for producing an energy conversion gradient functional composite,
Forming a metal layer of a metal powder;
And a phosphor layer formed on the metal layer, wherein the metal layer has a large amount of metal powder and a region spaced apart from the metal layer has a larger content of the phosphor powder, ;
Forming a phosphor layer made of a phosphor powder on the bonding layer; And
And sintering the metal layer, the bonding layer, and the phosphor layer.
In one embodiment of the present invention, the bonding layer continuously changes the content of the metal powder from the metal layer to the phosphor layer to 95 to 1% by volume based on the total amount of the mixed powder of the metal powder and the phosphor powder, The content may vary continuously from 5 to 99% by volume.
In one embodiment of the present invention, the solid phase sintering method can be used so that the composition ratio of the bonding layer does not change during the sintering process.
In the embodiment of the present invention, the bonding layer has a large amount of metal powder in the region adjacent to the metal layer, and the phosphor powder content in the region adjacent to the phosphor layer is large, so that the metal powder of the bonding layer and the phosphor powder The liquid phase sintering method can be used so that the content of the sintering agent continuously varies.
In one embodiment of the present invention, the sintering step comprises
Applying pressure to the laminated metal layer, the bonding layer and the phosphor layer;
Heating the laminated metal layer, the bonding layer and the phosphor layer; And
And releasing the pressure and cooling the laminated metal layer, the bonding layer and the phosphor layer.
The pressure is preferably 30 to 100 MPa, and the heating temperature is preferably 50 to 500 DEG C lower than the melting temperature of the melting point of the metal powder and the phosphor powder.
The sintering may be performed by a discharge plasma sintering method or a pressure sintering method, but is not limited thereto.
Hereinafter, the present invention will be described in more detail with reference to Examples. It is to be understood by those skilled in the art that these embodiments are for illustrative purpose only and that the scope of the present invention is not limited to these embodiments.
Example 1: Preparation of energy conversion gradient functional complex
Example 1-1: Lamination of a metal layer, a bonding layer and a phosphor layer
A metal layer and a phosphor layer were respectively formed using copper powder (diameter of 100 탆 or less) and ZnS: Cu, Cl phosphor powder (diameter of 10 탆 or less). Then, the copper powder and the ZnS: Cu, Cl phosphor powder were mixed in the composition shown in the following Table 1, and the mixture was hand-shaken for 15 minutes, and the graphite die having a diameter of 15 mm was used as the lowest layer of the metal layer 0.2 g each were successively laminated.
Example 1-2: Preparation of energy conversion gradient functional complex
The metal layer, the bonding layer, and the phosphor layer stacked in Example 1-1 were sintered at 900 DEG C for 5 minutes under a pressure of 50 MPa to prepare an inclined functional complex. At this time, the temperature raising rate was 100 deg. C per minute. The diameter of the prepared gradient functional complex was 15 mm and the thickness was 20 mm.
FIG. 3 shows the energy conversion gradient functional composite prepared in the above embodiment.
Experimental Example 1: Photoluminescence spectrum analysis
The photoluminescence spectrum (? Ex = 365 nm) of the graded functional composite prepared in Example 1 is shown in FIG.
5, it can be seen that the peak of the copper-ZnS: Cu, Cl tilt function complex is redshifted compared to the peak of the ZnS: Cu, Cl phosphor powder, It was predicted that the formation of defect levels in the ZnS crystal due to the sublimation of Zn in the ZnS due to sintering during the preparation of the Cu and Cl gradient functional complexes and the copper doping to the sublimated Zn sites.
Further, the change of the peak of the photoluminescence spectrum (λ ex = 365 nm) according to the temperature of the gradient functional complex prepared in Example 1 is shown in Table 2 and FIGS. 6 and 7.
Referring to Table 2 and FIGS. 6 and 7, it was confirmed that the peak of the copper-ZnS: Cu, Cl gradient functional complex did not generate a red shift compared to the peak of the ZnS: Cu, Cl phosphor powder. This is because the heat transferred to the copper-ZnS: Cu, Cl gradient function complex escapes through the copper (397 W / mK) having high thermal conductivity as a passageway, thereby suppressing the formation of phonon due to the residual heat in the phosphor .
Accordingly, it was confirmed that the energy conversion gradient functional composite according to the present invention has excellent thermal stability and can suppress the delamination between the metal layer and the phosphor layer.
Experimental Example 2: Measurement of current-voltage curve (I-V curve)
FIG. 8 shows a graph of current-voltage curve (I-V curve) when UV light of 365 nm was irradiated to the copper-ZnS: Cu, Cl gradient functional composite prepared in Example 1 and when it was not irradiated (Dark).
Referring to FIG. 8, it was found that the amount of current of the copper-ZnS: Cu, Cl tilting functional complex increased with irradiation of UV at 365 nm, and it was confirmed that it was applicable to a UV sensor because of its excellent electrical stability.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Do. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Accordingly, the actual scope of the invention is defined by the appended claims and their equivalents.
100: Energy conversion gradient functional complex
110: metal layer
120: bonding layer
125: mixed layer
130: phosphor layer
Claims (18)
A phosphor layer made of a phosphor powder; And
A bonding layer composed of a plurality of mixed layers composed of a mixed powder of a metal powder and a phosphor powder is formed between the metal layer and the phosphor layer,
Wherein each layer of the plurality of mixed layers is composed of mixed powders of a metal powder and a phosphor powder having different composition ratios,
The content of the metal powder in the mixed layer adjacent to the metal layer is increased and the content of the phosphor powder in the mixed layer adjacent to the phosphor layer is increased so that the content of the metal powder and the phosphor powder in each layer of the mixed layer are continuously Lt; / RTI >
The composition ratio of each layer of the plurality of mixed layers varies from 95: 5 to 1:99 in volume percentage of the metal powder and the phosphor powder from the metal layer to the phosphor layer,
The metal layer, the phosphor layer and the bonding layer are formed by sintering so that the composition ratio of the mixed powder progressively changes without an interface between layers,
The thermal expansion coefficient difference is reduced by the integrated structure of the metal layer, the phosphor layer and the bonding layer, and the thermal shock and thermal fatigue characteristics are improved by mitigating the concentration of residual stress due to the reduced thermal expansion coefficient,
The delamination between the metal layer, the phosphor layer and the bonding layer is prevented by the improved thermal shock and thermal fatigue characteristics,
The gradient functional composite comprising the metal layer, the phosphor layer and the bonding layer exhibits excellent thermal stability.
A phosphor layer made of a phosphor powder; And
A single-layer bonding layer made of a mixed powder of a metal powder and a phosphor powder is formed between the metal layer and the phosphor layer,
The content of the metal powder in the region adjacent to the metal layer in the bonding layer is large and the content of the phosphor powder in the region adjacent to the phosphor layer is large so that the content of the metal powder and the phosphor powder in the bonding layer continuously change,
The content of the metal powder continuously varies from 95 to 1% by volume with respect to the total amount of the mixed powder of the metal powder and the phosphor powder from the metal layer to the phosphor layer, and the content of the phosphor powder ranges from 5 to 99% Continuously changing,
The metal layer, the phosphor layer and the bonding layer are formed by sintering so that the composition ratio of the mixed powder progressively changes without an interface between layers,
The thermal expansion coefficient difference is reduced by the integrated structure of the metal layer, the phosphor layer and the bonding layer, and the thermal shock and thermal fatigue characteristics are improved by mitigating the concentration of residual stress due to the reduced thermal expansion coefficient,
The delamination between the metal layer, the phosphor layer and the bonding layer is prevented by the improved thermal shock and thermal fatigue characteristics,
The gradient functional composite comprising the metal layer, the phosphor layer and the bonding layer exhibits excellent thermal stability.
Preparing a plurality of mixed powders by uniformly mixing metal powders and phosphor powders at different composition ratios;
The composition ratio of the mixed powder is larger on the metal layer than on the metal layer and the content of the phosphor powder is larger as the layer is separated from the metal layer so that the composition ratio of the mixed powder is continuously changed Sequentially stacking the mixed powders so as to form a bonding layer composed of a plurality of mixed layers;
Forming a phosphor layer made of a phosphor powder on the bonding layer; And
Sintering the metal layer, the bonding layer and the phosphor layer,
The composition ratio of each layer of the plurality of mixed layers varies from 95: 5 to 1:99 in the volume percentage of the metal powder and the phosphor powder from the metal layer to the phosphor layer,
The metal layer, the phosphor layer and the bonding layer are formed by sintering so that the composition ratio of the mixed powder progressively changes without an interface between layers,
The thermal expansion coefficient difference is reduced by the integrated structure of the metal layer, the phosphor layer and the bonding layer, and the thermal shock and thermal fatigue characteristics are improved by mitigating the concentration of residual stress due to the reduced thermal expansion coefficient,
The delamination between the metal layer, the phosphor layer and the bonding layer is prevented by the improved thermal shock and thermal fatigue characteristics,
Wherein the gradient function composite comprising the metal layer, the phosphor layer and the bonding layer exhibits excellent thermal stability.
And a phosphor layer formed on the metal layer, wherein the metal layer has a large amount of metal powder and a region spaced apart from the metal layer has a larger content of the phosphor powder, ;
Forming a phosphor layer made of a phosphor powder on the bonding layer; And
Sintering the metal layer, the bonding layer and the phosphor layer,
The content of the metal powder continuously varies from 95 to 1% by volume with respect to the total amount of the mixed powder of the metal powder and the phosphor powder from the metal layer to the phosphor layer, and the content of the phosphor powder ranges from 5 to 99% Continuously changing,
The metal layer, the phosphor layer and the bonding layer are formed by sintering so that the composition ratio of the mixed powder progressively changes without an interface between layers,
The thermal expansion coefficient difference is reduced by the integrated structure of the metal layer, the phosphor layer and the bonding layer, and the thermal shock and thermal fatigue characteristics are improved by mitigating the concentration of residual stress due to the reduced thermal expansion coefficient,
The delamination between the metal layer, the phosphor layer and the bonding layer is prevented by the improved thermal shock and thermal fatigue characteristics,
Wherein the gradient function composite comprising the metal layer, the phosphor layer and the bonding layer exhibits excellent thermal stability.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150122003A KR101782107B1 (en) | 2015-08-28 | 2015-08-28 | Functionally Graded Composites for Energy Conversion and Process for Preparing the Same |
| PCT/KR2016/009180 WO2017039200A1 (en) | 2015-08-28 | 2016-08-19 | Functionally graded composite for energy conversion, manufacturing method therefor, and sensor using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150122003A KR101782107B1 (en) | 2015-08-28 | 2015-08-28 | Functionally Graded Composites for Energy Conversion and Process for Preparing the Same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20170025500A KR20170025500A (en) | 2017-03-08 |
| KR101782107B1 true KR101782107B1 (en) | 2017-09-26 |
Family
ID=58403741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020150122003A KR101782107B1 (en) | 2015-08-28 | 2015-08-28 | Functionally Graded Composites for Energy Conversion and Process for Preparing the Same |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR101782107B1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000219923A (en) * | 1999-01-29 | 2000-08-08 | Louis Renner Gmbh | Composite material produced by powder metallurgy, its production and electric contact material |
| JP2010171027A (en) * | 2002-12-20 | 2010-08-05 | Ifire Ip Corp | Barrier layer for thick film dielectric electroluminescent displays |
| JP2011119683A (en) * | 2009-10-30 | 2011-06-16 | Sumitomo Chemical Co Ltd | Organic photoelectric conversion element |
| JP5102533B2 (en) * | 2007-04-24 | 2012-12-19 | パナソニック株式会社 | Organic light emitting device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101366491B1 (en) | 2007-08-22 | 2014-02-24 | 삼성전자주식회사 | Metal hydroxy carbonate Nano Particle Coated phosphor and Method for preparing the same |
-
2015
- 2015-08-28 KR KR1020150122003A patent/KR101782107B1/en active IP Right Grant
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000219923A (en) * | 1999-01-29 | 2000-08-08 | Louis Renner Gmbh | Composite material produced by powder metallurgy, its production and electric contact material |
| JP2010171027A (en) * | 2002-12-20 | 2010-08-05 | Ifire Ip Corp | Barrier layer for thick film dielectric electroluminescent displays |
| JP5102533B2 (en) * | 2007-04-24 | 2012-12-19 | パナソニック株式会社 | Organic light emitting device |
| JP2011119683A (en) * | 2009-10-30 | 2011-06-16 | Sumitomo Chemical Co Ltd | Organic photoelectric conversion element |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20170025500A (en) | 2017-03-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Han et al. | Low‐dimensional metal halide perovskite crystal materials: structure strategies and luminescence applications | |
| Van Le et al. | Recent advances toward high‐efficiency halide perovskite light‐emitting diodes: review and perspective | |
| US11871590B2 (en) | Thin film of metal oxide, organic electroluminescent device including thin film, photovoltaic cell including thin film, and manufacturing method of thin film | |
| Xiang et al. | A thermally stable warm WLED obtained by screen-printing a red phosphor layer on the LuAG: Ce3+ PiG substrate | |
| Moon et al. | Composition-tailored ZnMgO nanoparticles for electron transport layers of highly efficient and bright InP-based quantum dot light emitting diodes | |
| KR101626525B1 (en) | Quantum dot-light-emitting devices comprising alloyed nanoparticle electron transport layer and method for fabricating the same | |
| WO2013065956A1 (en) | Tunable light emitting diode using graphene conjugated metal oxide semiconductor-graphene core-shell quantum dots and its fabrication process thereof | |
| Ji et al. | Highly efficient flexible quantum-dot light emitting diodes with an ITO/Ag/ITO cathode | |
| Choi et al. | Color-tunable Ag-In-Zn-S quantum-dot light-emitting devices realizing green, yellow and amber emissions | |
| JPWO2007032175A1 (en) | Conductive laminate and organic EL device | |
| GB2458443A (en) | Electroluminescent device | |
| KR20180053379A (en) | Blue OLED Distribution over a color conversion layer with micro cavities for lighting applications Bragg reflectors | |
| Kim et al. | Advancement in materials for energy-saving lighting devices | |
| Da Silva et al. | GO: PEDOT: PSS for high-performance green phosphorescent organic light-emitting diode | |
| Oh et al. | Highly efficient white electroluminescent devices with hybrid double emitting layers of quantum dots and phosphorescent molecules | |
| Wang et al. | Boosting the efficiency and stability of green InP quantum dot light emitting diodes by interface dipole modulation | |
| Cho et al. | Colour-encoded electroluminescent white light-emitting diodes enabled using perovskite–Cu–In–S quantum composites | |
| JPWO2006070715A1 (en) | Conductive film, conductive substrate, and organic electroluminescence element | |
| KR101782107B1 (en) | Functionally Graded Composites for Energy Conversion and Process for Preparing the Same | |
| Li et al. | High performance pure blue organic fluorescent electroluminescent devices by utilizing a traditional electron transport material as the emitter | |
| KR101729390B1 (en) | Composition-controlled organic/inorganic hybrid perovskite light-emitting diodes and manufacturing method thereof | |
| JPH0377299A (en) | Organic electroluminescense element | |
| Wei et al. | Hole transport layer-free and full-solution processed all-inorganic quantum dot light emitting diodes with low turn-on voltage | |
| CN114122272A (en) | Composite material and electroluminescent device | |
| Chen et al. | Carrier recombination spatial transfer by reduced potential barrier causes blue/red switchable luminescence in C8 carbon quantum dots/organic hybrid light-emitting devices |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| E902 | Notification of reason for refusal | ||
| E701 | Decision to grant or registration of patent right | ||
| GRNT | Written decision to grant |