WO2014008719A1 - 发光器件及其制作方法 - Google Patents
发光器件及其制作方法 Download PDFInfo
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- WO2014008719A1 WO2014008719A1 PCT/CN2012/083713 CN2012083713W WO2014008719A1 WO 2014008719 A1 WO2014008719 A1 WO 2014008719A1 CN 2012083713 W CN2012083713 W CN 2012083713W WO 2014008719 A1 WO2014008719 A1 WO 2014008719A1
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- Prior art keywords
- light
- semiconductor
- layer
- type semiconductor
- metal
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 239000004065 semiconductor Substances 0.000 claims abstract description 164
- 238000005057 refrigeration Methods 0.000 claims abstract description 65
- 239000000758 substrate Substances 0.000 claims abstract description 34
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- 229910052751 metal Inorganic materials 0.000 claims description 99
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
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- 230000005679 Peltier effect Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
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- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-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
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- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
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- 229910052738 indium Inorganic materials 0.000 description 1
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- -1 indium tin oxide ITO Chemical class 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 238000009616 inductively coupled plasma Methods 0.000 description 1
- 238000007641 inkjet printing Methods 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000007737 ion beam deposition Methods 0.000 description 1
- 238000007733 ion plating Methods 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910001635 magnesium fluoride Inorganic materials 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000001451 molecular beam epitaxy Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
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- 238000005546 reactive sputtering Methods 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 238000005477 sputtering target Methods 0.000 description 1
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- 238000007738 vacuum evaporation Methods 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N19/00—Integrated devices, or assemblies of multiple devices, comprising at least one thermoelectric or thermomagnetic element covered by groups H10N10/00 - H10N15/00
- H10N19/101—Multiple thermocouples connected in a cascade arrangement
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
- H10N10/01—Manufacture or treatment
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/38—Cooling arrangements using the Peltier effect
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/87—Arrangements for heating or cooling
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/8794—Arrangements for heating and cooling
Definitions
- Embodiments of the present invention relate to a light emitting device and a method of fabricating the same. Background technique
- OLED Organic Light-Emitting Diode
- liquid crystal display technology can be used in the third generation display technology after liquid crystal display technology, and has a wide range of applications in various fields such as flat panel display, illumination, and backlight.
- the organic materials in OLEDs are sensitive to oxygen and, when exposed to oxygen, are prone to react with oxygen, which deteriorates the performance of OLEDs.
- glass is generally used to coat the entire light-emitting portion of the OLED.
- the use of glass coating can prevent the organic material in the OLED from coming into contact with oxygen, but there is a gap between the OLED itself and the coated glass, and the glass itself is a material that is not easily thermally conductive. Therefore, the heat generated by the OLED energization work is not easily conducted, which may cause overheating damage of the OLED and affect the service life of the OLED. Summary of the invention
- Embodiments of the present invention provide a light emitting device and a manufacturing method thereof, which can effectively improve heat dissipation performance of an illuminating device, thereby prolonging the service life of the illuminating device.
- an embodiment of the present invention provides a light emitting device including a substrate, wherein the substrate is provided with a light emitting portion; the light emitting device further includes a semiconductor thermoelectric refrigeration portion, and the semiconductor thermoelectric refrigeration portion is disposed in the light emitting portion on.
- an embodiment of the present invention provides a method for fabricating the above light emitting device, comprising the steps of: preparing a light emitting portion on a substrate; preparing a semiconductor thermoelectric refrigeration portion on the substrate on which the light emitting portion is prepared; The substrate having the light-emitting portion and the semiconductor thermoelectric cooling portion is subjected to a packaging process.
- the light-emitting device and the manufacturing method thereof are provided in the embodiment of the invention, wherein the light-emitting device is integrated with a semiconductor thermoelectric refrigeration unit, which utilizes the principle of thermoelectric effect to absorb and release heat generated by the light-emitting portion when the light-emitting portion operates.
- the temperature at the time of operation of the light-emitting portion is lowered, and therefore, the heat dissipation performance of the light-emitting device can be effectively improved, thereby prolonging the service life of the light-emitting device.
- FIG. 1 is a schematic structural diagram of a light emitting device according to an embodiment of the present invention.
- FIG. 2 is a schematic structural diagram of a light emitting device according to an embodiment of the present invention.
- FIG. 3 (a) - (c) are schematic diagrams showing the principle of connection of a semiconductor refrigeration unit in a light emitting device according to an embodiment of the present invention
- FIG. 4 is a schematic structural diagram of a light emitting device according to an embodiment of the present invention. detailed description
- a light emitting device includes a substrate 1 on which a light emitting portion 2 is disposed; a semiconductor thermoelectric cooling portion 3 is further integrated in the light emitting device, and a semiconductor thermoelectric cooling portion 3 is disposed in the On the light-emitting portion 2.
- the semiconductor thermoelectric refrigeration section 3 is a component that performs refrigeration using a semiconductor thermoelectric material based on the Peltier effect (i.e., thermoelectric effect) principle, and includes a cold end 31 and a hot end 32. Cold end 31 is close to hair The light portion 2 is for absorbing heat generated by the light-emitting portion 2, and the hot end 32 is away from the light-emitting portion 2 for releasing heat absorbed by the cold end 31.
- Peltier effect i.e., thermoelectric effect
- the semiconductor thermoelectric refrigeration unit 3 is integrated in the light-emitting device, and is directly prepared on the light-emitting portion 2, so that a good cooling effect can be obtained.
- the light-emitting device provided by the embodiment of the present invention absorbs and releases the heat generated by the light-emitting portion 2 by the semiconductor thermoelectric refrigeration unit 3 when the light-emitting portion 2 is operated, thereby reducing the temperature during operation of the light-emitting portion 2, and thus the heat dissipation performance of the light-emitting device. An effective improvement can be obtained, so that the service life of the light-emitting device can be extended.
- the semiconductor thermoelectric refrigeration section 3 includes a first insulating and thermally conductive layer 301, a semiconductor thermopile layer 302, and a second insulating and thermally conductive layer 303;
- the layer 301 is disposed on the light emitting portion 2
- the semiconductor thermopile layer 302 is disposed on the first insulating heat conductive layer 301
- the second insulating heat conductive layer 303 is disposed on the semiconductor thermopile layer 302.
- the semiconductor thermopile layer 302 includes at least one semiconductor refrigeration unit 304 (shown in phantom).
- Each of the semiconductor refrigeration units 304 includes a metal lower electrode 3041, a P-type semiconductor 3042, an N-type semiconductor 3043, and a metal upper electrode 3044.
- the metal lower electrode 3041 is disposed on the first insulating and thermally conductive layer 301, and the P-type semiconductor 3042 and the N-type semiconductor 3043. It is disposed on the metal lower electrode 3041, and the metal upper electrode 3044 is disposed on the top of the P-type semiconductor and on the top of the N-type semiconductor.
- the bottom of the P-type semiconductor 3042 of the same semiconductor refrigeration unit 304 and the bottom of the N-type semiconductor 3043 are connected by the metal lower electrode 3041; when the semiconductor thermopile layer 302 includes a plurality of semiconductor refrigeration units 304, Metal upper electrode 3044 is used for the connection between adjacent semiconductor refrigeration units 304.
- the heat generated by the light-emitting portion 2 is transmitted to the cold end through the first insulating heat-conducting layer 301, the cold end absorbs the heat, and the hot end releases the heat absorbed by the cold end, and the heat is released. Heat is transferred to the outside of the light emitting element through the second insulating heat conductive layer 303.
- the semiconductor thermopile layer 302 includes a plurality of (two or more) semiconductor refrigeration units 304.
- the plurality of semiconductor refrigeration units 304 may be arranged in an array; as shown in FIGS. 3(a) to 3(c), the plurality of semiconductor refrigeration units 304 may be connected in series, in parallel, or in series and parallel to form a multi-stage thermopile.
- the multi-stage thermopile expands the area of the cold and hot ends for better cooling. This embodiment realizes the connection between the plurality of semiconductor refrigeration units 304 through the metal upper electrode 3044.
- a plurality of semiconductor refrigeration units are distributed in two columns, two columns of semiconductor refrigeration units are connected in series, current flows through each semiconductor refrigeration unit without splitting, and current flowing through each refrigeration unit is N.
- the type semiconductor flows to the P-type semiconductor.
- a plurality of semiconductor refrigeration units are divided into two columns, two columns of semiconductor refrigeration units are connected in parallel, current is divided and flows through two columns of semiconductor refrigeration units, and current flowing through each refrigeration unit is N.
- the type semiconductor flows to the P-type semiconductor.
- a series-parallel combination connection refers to both a column and a column series connection, and a parallel connection of columns and columns.
- Fig. 3 (a) to Fig. 3 (c) are only schematic schematic views of the connection between the plurality of semiconductor refrigeration units 304, and do not indicate the number and true connection of the semiconductor refrigeration unit of the present embodiment.
- each column of semiconductor refrigeration units may include one or more semiconductor refrigeration units, and a plurality of columns of semiconductor refrigeration units may be distributed in the semiconductor thermopile layer 302.
- a person skilled in the art can select the number and/or the number of semiconductor refrigeration units according to the connection principle of FIG. 3(a) to FIG. 3(c), and realize series connection and parallel connection of a plurality of semiconductor refrigeration units through the metal upper electrode 3044. Or series-parallel combination connection, and will not be described here.
- an insulating isolation portion 305 may be disposed between the P-type semiconductor 3042 and the N-type semiconductor 3043 of the same semiconductor refrigeration unit 304 and between the adjacent semiconductor refrigeration units 304 to effectively ensure the semiconductor refrigeration unit 304. Electrical performance.
- the materials of the first insulating and thermally conductive layer 301 and the second insulating and thermally conductive layer 302 may be the same or different, and since both are used to conduct heat, the materials of both are preferably inorganic materials having high thermal conductivity.
- the materials of the first insulating heat conductive layer 301 and the second insulating heat conductive layer 302 may be selected from the group consisting of diamond-like, aluminum nitride, boron nitride, silicon nitride, aluminum oxide, and magnesium oxide.
- the materials of the first insulating and thermally conductive layer 301 and the second insulating and thermally conductive layer 302 may be the same or different.
- the first and second insulating and thermally conductive layers 302 have a thickness of 100-5000 nm.
- the material of the P-type semiconductor 3042 may be selected from one or a combination of the following materials: bismuth telluride binary solid solution Bi 2 Te 3 — Sb 2 Te 3 , bismuth telluride ternary solid solution Bi 2 Te 3 - Sb 2 Te 3 - Sb 2 Se 3 , P-type Ag (lx) Cu(x) Ti Te, YBaCuO superconducting material.
- the material of the N-type semiconductor 3043 may be selected from one or a combination of the following materials: Bismuth telluride binary solid solution Bi 2 Te 3 — Bi 2 Se 3 , bismuth telluride ternary solid solution Bi 2 Te 3 - Sb 2 Te 3 - Sb 2 Se 3 , N-type Bi - Sb alloy, YBaCuO superconducting material.
- the ternary solid solution of bismuth telluride increases the forbidden band width of the solid solution material, and can further reduce the lattice thermal conductivity.
- the materials of the metal upper electrode 3044 and the metal lower electrode 3041 may be the same or different, and may be selected from one of the following materials: silver, copper, gold, and aluminum, and the thickness of the two may be the same. They may be different, for example, each may be 50-1000 nm.
- the illuminating device may be an OLED, an inorganic light emitting diode, an organic solar cell, an inorganic solar cell, an organic thin film transistor, an inorganic thin film transistor, a photodetector, etc., which is not limited by the present invention.
- the embodiment of the present invention further provides a method for fabricating the above light emitting device, comprising the following steps:
- Step 10 preparing a light-emitting portion on the substrate.
- This step can be completed, for example, by using related steps in the prior art, and details are not described herein again.
- Step 11 Prepare a semiconductor thermoelectric refrigeration unit on the substrate on which the light-emitting portion is prepared.
- this step 11 may include, for example, the following steps.
- a first insulating and thermally conductive layer is deposited on the light emitting portion.
- the first insulating and thermally conductive layer is deposited by printing, electroplating or the like, which is not limited in the present invention.
- a metal lower electrode is prepared by a shadow mask process.
- the mask process exposes the position where the metal lower electrode needs to be formed through the mask, and blocks other positions, so that the metal lower electrode is only prepared at the position where the mask is exposed, and the position blocked by the mask is protected.
- the principle of the other mask processes used below is the same.
- the metal lower electrode can be vacuum vapor deposited, magnetron sputtered, ion plated, DC sputter coated, RF sputter coated, ion beam sputter coated, ion beam assisted deposition, plasma enhanced chemical vapor deposition, high density inductor Coupled plasma source chemical vapor deposition, ion beam deposition, metal organic chemical vapor deposition, catalytic chemical vapor deposition, laser pulse deposition, pulsed plasma method, pulsed laser method, electron beam evaporation, sol-gel method
- the preparation is carried out by means of inkjet printing, electroplating, etc., and the invention is not limited thereto.
- a P-type semiconductor and an N-type semiconductor are separately prepared by using a mask process.
- the order of preparation of the P-type semiconductor and the N-type semiconductor is not limited, and a P-type semiconductor can be prepared first, and then an N-type semiconductor can be prepared, and vice versa.
- MOCVD metal organic chemical vapor deposition
- PLD pulsed laser deposition
- MBE molecular beam epitaxy
- MS magnetron sputtering
- IBS ion beam sputtering
- Co- co-evaporation
- the P-type semiconductor and the N-type semiconductor are prepared by one or several methods of evaporation and flash evaporation, which are not limited in the present invention.
- a metal upper electrode is prepared by a mask process.
- the metal upper electrode can be prepared in the same manner as the metal lower electrode, and will not be described again here.
- a second insulating thermally conductive layer is deposited on the metal upper electrode.
- the second insulating and thermally conductive layer can be prepared in the same manner as the first insulating and thermally conductive layer, and details are not described herein.
- the manufacturing method in order to ensure the electrical performance of the light emitting device, and effectively avoid electrical failure such as short circuit, before preparing the P-type semiconductor and the N-type semiconductor, before preparing the metal upper electrode, the manufacturing method It also includes the following steps.
- An insulating process is applied between the P-type semiconductor and the N-type semiconductor of the same semiconductor refrigeration unit and the adjacent semiconductor refrigeration unit 304 by applying a mask process.
- Step 12 encapsulating the substrate on which the light-emitting portion and the semiconductor thermoelectric cooling portion are prepared.
- a plurality of packaging methods such as a metal foil, a glass package cover, and a composite film may be used, and a hybrid package may also be used.
- the hybrid package refers to packaging at least two packages at the same time, for example, using Metal foil package, glass cover on metal foil Package.
- the illuminating device is exemplified as an OLED.
- the light emitting device is an OLED, but the invention is not limited thereto, and may be, for example, an LED prepared from an inorganic semiconductor material.
- the OLED includes a substrate 1 on which a light emitting portion 2 is disposed, and a light emitting portion 2 is provided with a semiconductor thermoelectric cooling portion 3; the light emitting portion 2 includes an anode layer 20, an organic functional layer 21, and a metal electrode layer 22.
- the anode layer 20 is disposed on the substrate 1, the organic functional layer 21 is disposed on the anode layer 20, and the metal electrode layer 22 is disposed on the organic functional layer 21.
- the structure of the semiconductor thermoelectric refrigeration portion 3 is the same as that of the embodiment shown in FIG. It is not described again that the first insulating and thermally conductive layer 301 is disposed on the metal electrode layer 22.
- the substrate 1 has good light transmission properties in the visible light region, has a certain ability to penetrate water vapor and oxygen, and has good surface flatness.
- the substrate 1 may be a glass or a flexible substrate, and the flexible substrate may be made of one of a polyester or a polyimide compound or a relatively thin metal.
- the anode layer 20 serves as a connection layer for the forward voltage of the organic light emitting diode, such as an inorganic metal oxide (such as indium tin oxide ITO, oxidized yttrium, etc.), an organic conductive polymer (such as PEDOT: PSS, PANI, etc.) or high work.
- the metal material of the function such as gold, copper, silver, platinum, etc.).
- the metal electrode layer 22 serves as a connection layer for the negative voltage of the device, for example, a low work function metal material such as lithium, magnesium, calcium, barium, aluminum, indium or the like having a lower work function or an alloy thereof with copper, gold or silver, or Includes a thin layer of buffered insulation (such as LiF MgF2, etc.) and the metals or alloys mentioned above.
- a low work function metal material such as lithium, magnesium, calcium, barium, aluminum, indium or the like having a lower work function or an alloy thereof with copper, gold or silver
- a thin layer of buffered insulation such as LiF MgF2, etc.
- the anode layer 20 is an ITO layer
- the metal electrode layer 22 is a Mg:Ag alloy layer
- the first insulating heat conductive layer 301 and the second insulating heat conductive layer 303 are diamond-like layers, and the thickness thereof is
- the material of the metal upper electrode 3044 and the metal lower electrode 3041 is A1
- the thickness of the 1000 P-type semiconductor 3042 is Bi 2 Te 3 — Sb 2 Te 3
- the N-type semiconductor 3043 is Bi 2 Te 3 — Bi 2 Se 3 .
- Thickness is 1500nm
- the method for fabricating the OLED can include the following steps:
- An anode layer 20, an organic functional layer 21, and a metal electrode layer 22 are sequentially formed on the substrate 1 to complete the preparation of the light-emitting portion 2.
- the high-purity graphite is used as the cathode, and the vacuum of the vacuum chamber is 1 (T 3 Pa, arc current 70 A, arc voltage 20 V, and filtered magnetic field current 20 A, Produces a magnetic field of 40mT, using 99.999% high-purity argon as the working gas, the gas flow rate is controlled at 1.5sccm, the periodic bias is (0, -50V), the deposition time is 60min, and the distance between the substrate 1 and the high-purity graphite cathode 30cm
- the diamond-like carbon film prepared in this step has a thickness of 500 nm, the surface is dense and smooth, and the surface roughness is less than 1 nm.
- a dense thermal conductivity A1 metal array (multiple metal lower electrodes 3041) is prepared on the diamond-like carbon film by magnetron sputtering using a mask process.
- the A1 metal array is used to connect the P-type semiconductor and the N-type semiconductor in each of the semiconductor refrigeration units 304.
- a P-type semiconductor array (multiple P-type semiconductors 3042) is prepared by RF magnetron sputtering using a mask process.
- the target of RF magnetron sputtering is binary solid solution alloy Bi 2 Te 3 — Sb 2 Te 3 , sputtering power is 100W, sputtering pressure is 3Pa (Ar gas pressure), sputtering time is 60min, film thickness For 1500
- an N-type semiconductor array (multiple N-type semiconductors 3042) is prepared by RF magnetron sputtering using a mask process.
- the target of RF magnetron sputtering is a binary solid solution alloy Bi 2 Te 3 — Bi 2 Se 3 , a sputtering power of 120 W, a sputtering gas pressure of 2 Pa (Ar gas pressure), a sputtering time of 40 min, and a film thickness. It is 1500nm.
- process parameters used may be the same as those in step 2.
- those skilled in the art may also select other process parameters, and details are not described herein again.
- Al metal array is used to connect adjacent semiconductors of adjacent semiconductor refrigeration units 304 such that the plurality of semiconductor refrigeration units 304 are connected in series, in parallel, or in a series-parallel combination.
- a diamond-like carbon film (second insulating and thermally conductive layer 303) is prepared.
- step 2 the process parameters used are the same as those in step 2, and are not described here.
- steps 7 and 8 may be repeated a plurality of times to form a multilayer composite film structure sealing layer, that is, a dense layer may be prepared by magnetron sputtering on the diamond-like film prepared in step 8.
- the A1 metal layer with high thermal conductivity forms a sealing layer together with the diamond-like film to block the damage of the OLED device by water and oxygen, and at the same time increase the edge of the composite sealing layer.
- a diamond-like film is further prepared on the metal layer, and this is repeated several times to form a multilayer composite film structure sealing layer.
- the anode layer 20 is an ITO layer
- the metal electrode layer 22 is a Mg:Ag alloy
- the first insulating heat conductive layer 301 and the second insulating heat conductive layer 303 are aluminum nitride layers
- the thickness thereof is
- the material of the metal upper electrode 3044 and the metal lower electrode 3041 is A1, the thickness is 1000 ⁇
- the P-type semiconductor 3042 is Bi 2 Te 3 — Sb 2 Te 3
- the N-type semiconductor 3043 is Bi 2 Te 3 — Bi 2 Se. 3
- the thickness is 1500nm.
- the method for fabricating the OLED can include the following steps:
- An anode layer 20, an organic functional layer 21, and a metal electrode layer 22 are sequentially formed on the substrate 1 to complete the preparation of the light-emitting portion 2.
- An aluminum nitride film (first insulating layer 301) is grown on the metal electrode layer 22 by RF reactive magnetron sputtering.
- the vacuum in the working chamber is 3 x 10 4 Pa
- the sputtering target is 99.99% A1 target
- the working gas is 99.99% Ar and 99.99% N 2
- the partial pressure ratio of Ar to N 2 was 24:4
- the target base was 7.0 cm
- the temperature of the substrate 1 was 20 ° C (room temperature)
- the power was 40 W
- the sputtering time was 60 min.
- the target is pre-sputtered at a power of 30 W for 15 min before sputter deposition of the film to remove impurities such as oxides on the surface of the A1 target.
- a dense A1 metal array multiple metal lower electrodes 3041) having a high thermal conductivity on the aluminum nitride film prepared in step 2 by magnetron sputtering.
- a P-type semiconductor array (a plurality of P-type semiconductors 3042) is prepared by a radio frequency magnetron sputtering method using a mask process.
- the target of RF magnetron sputtering is binary solid solution alloy Bi 2 Te 3 — Sb 2 Te 3 , sputtering power is 100W, sputtering pressure is 3Pa (Ar gas pressure), sputtering time is 60min, film thickness It is 1500 baht.
- an N-type semiconductor array (a plurality of N-type semiconductors 3042) is prepared by a radio frequency magnetron sputtering method using a mask process.
- the target of RF magnetron sputtering is a binary solid solution alloy Bi 2 Te 3 — Bi 2 Se 3 , in which the sputtering power is 120 W, the sputtering pressure is 2 Pa (Ar gas pressure), and the sputtering time is 40 min.
- the thickness is 1500 nm.
- an A1 metal array (a plurality of metal upper electrodes 3044) is prepared by a magnetron sputtering method on a P-type semiconductor array and an N-type semiconductor array.
- an aluminum nitride film (second insulating and thermally conductive layer 303) is prepared.
- step 2 the process parameters used are the same as those in step 2, and are not described here.
- steps 7 and 8 can be repeated in multiple cycles to form a multilayer composite film structure sealing layer.
- the anode layer 20 is an ITO layer
- the metal electrode layer 22 is a Mg:Ag alloy layer
- the first insulating heat conductive layer 301 and the second insulating heat conductive layer 303 are aluminum oxide layers
- the thickness thereof is The material of the metal upper electrode 3044 and the metal lower electrode 3041 is Al, the thickness is 1000 ⁇
- the P-type semiconductor 3042 is Bi 2 Te 3 — Sb 2 Te 3
- the N-type semiconductor 3043 is Bi 2 Te 3 — Bi 2 Se. 3
- the thickness is 1500nm.
- the method for fabricating the OLED can include the following steps:
- the anode layer 20, the organic functional layer 21, and the metal electrode layer 22 are sequentially prepared on the substrate 1 to The preparation of the light-emitting portion 2 is completed.
- an aluminum oxide film is prepared by RF magnetron reactive sputtering.
- A1 is high-purity target, high-purity 02 as a reaction gas, 200W of RF power, sputtering gas pressure of 0.5 Pa is, a target substrate distance of 70mm, 02 gas flow l.Osccm, Ar gas flow rate It is lO.Osccm, the substrate temperature is room temperature, and the deposited film thickness is 500 nm.
- a dense layer of Ag metal with high thermal conductivity is prepared by magnetron sputtering, and a sealing layer is formed together with the alumina to block the damage of the OLED device by water and oxygen. Can increase the toughness of the composite sealing layer.
- steps 3 and 4 may be repeated a plurality of times to form a multilayer composite film structure sealing layer (first insulating heat conducting layer 301).
- a P-type semiconductor array (a plurality of P-type semiconductors 3042) is prepared by a radio frequency magnetron sputtering method using a mask process.
- the target of RF magnetron sputtering is a binary solid solution alloy Bi 2 Te 3 — Sb 2 Te 3 , in which the sputtering power is 100 W, the sputtering pressure is 3 Pa (Ar gas pressure), and the sputtering time is 60 min.
- the thickness is 1500 ⁇ .
- an N-type semiconductor array (a plurality of N-type semiconductors 3042) is prepared by a radio frequency magnetron sputtering method using a mask process.
- the target was a binary solid solution alloy Bi 2 Te 3 — Bi 2 Se 3 , in which the sputtering power was 120 W, the sputtering gas pressure was 2 Pa (Ar gas pressure), the sputtering time was 40 min, and the film thickness was 1500 ⁇ .
- step 2 the process parameters used can be the same as in step 2, and will not be described here.
- an A1 metal array (a plurality of metal upper electrodes 3044) is prepared by a magnetron sputtering method on a P-type semiconductor array and an N-type semiconductor array.
- an aluminum oxide film (second insulating and thermally conductive layer 303) is prepared.
- step 2 the process parameters used are the same as those in step 2, and are not described here. 10.
- step 2 the process parameters used are the same as those in step 2, and are not described here. 10.
- the anode layer 20 is an ITO layer
- the metal electrode layer 22 is a Mg:Ag alloy layer
- the first insulating heat conductive layer 301 and the second insulating heat conductive layer 303 are diamond-like layers, and the thickness thereof is 500 nm
- the material of the metal upper electrode 3044 and the metal lower electrode 3041 is A1
- the thickness of the 1000 P type semiconductor 3042 is a ternary solid solution Bi 2 Te 3 - S b2 Te 3 - Sb 2 Se 3
- the N type semiconductor 3043 is ternary Solid solution Bi 2 Te 3 - Sb 2 Te 3 - Sb 2 Se 3 , thickness 1500nm
- the preparation method is similar to that of Example 3 except that the materials of the P-type semiconductor 3042 and the N-type semiconductor 3043 are prepared, and will not be described herein.
- the OLED of the semiconductor thermoelectric refrigeration section was not integrated, and the light-emitting section was prepared in the same manner as in the foregoing Examples 1 to 3.
- the OLED provided by the embodiment of the present invention has a lower operating temperature and a longer lifetime, that is, the heat dissipation performance of the light emitting device can be effectively improved, thereby prolonging the service life of the light emitting device.
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