WO2001063975A1 - Dispositif organique el et procede de fabrication - Google Patents
Dispositif organique el et procede de fabrication Download PDFInfo
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- WO2001063975A1 WO2001063975A1 PCT/JP2001/001428 JP0101428W WO0163975A1 WO 2001063975 A1 WO2001063975 A1 WO 2001063975A1 JP 0101428 W JP0101428 W JP 0101428W WO 0163975 A1 WO0163975 A1 WO 0163975A1
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- organic
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- anode
- cathode
- light
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- 238000004519 manufacturing process Methods 0.000 title claims description 15
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
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- 229910001512 metal fluoride Inorganic materials 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 150000004706 metal oxides Chemical class 0.000 claims description 3
- 239000010406 cathode material Substances 0.000 claims description 2
- 238000000059 patterning Methods 0.000 description 14
- 238000002347 injection Methods 0.000 description 13
- 239000007924 injection Substances 0.000 description 13
- 239000010408 film Substances 0.000 description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 8
- 229910052710 silicon Inorganic materials 0.000 description 8
- 239000010703 silicon Substances 0.000 description 8
- 238000001704 evaporation Methods 0.000 description 6
- 229910052715 tantalum Inorganic materials 0.000 description 6
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 6
- 230000005525 hole transport Effects 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
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- 239000004642 Polyimide Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 4
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- 229920002098 polyfluorene Polymers 0.000 description 4
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- 230000007423 decrease Effects 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- BFIMMTCNYPIMRN-UHFFFAOYSA-N 1,2,3,5-tetramethylbenzene Chemical compound CC1=CC(C)=C(C)C(C)=C1 BFIMMTCNYPIMRN-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
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- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229920000767 polyaniline Polymers 0.000 description 2
- 238000002310 reflectometry Methods 0.000 description 2
- 238000004528 spin coating Methods 0.000 description 2
- UHXOHPVVEHBKKT-UHFFFAOYSA-N 1-(2,2-diphenylethenyl)-4-[4-(2,2-diphenylethenyl)phenyl]benzene Chemical compound C=1C=C(C=2C=CC(C=C(C=3C=CC=CC=3)C=3C=CC=CC=3)=CC=2)C=CC=1C=C(C=1C=CC=CC=1)C1=CC=CC=C1 UHXOHPVVEHBKKT-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
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 229920000285 Polydioctylfluorene Polymers 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 239000001177 diphosphate Substances 0.000 description 1
- XPPKVPWEQAFLFU-UHFFFAOYSA-J diphosphate(4-) Chemical compound [O-]P([O-])(=O)OP([O-])([O-])=O XPPKVPWEQAFLFU-UHFFFAOYSA-J 0.000 description 1
- 235000011180 diphosphates Nutrition 0.000 description 1
- XPPKVPWEQAFLFU-UHFFFAOYSA-N diphosphoric acid Chemical compound OP(O)(=O)OP(O)(O)=O XPPKVPWEQAFLFU-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- RBTKNAXYKSUFRK-UHFFFAOYSA-N heliogen blue Chemical compound [Cu].[N-]1C2=C(C=CC=C3)C3=C1N=C([N-]1)C3=CC=CC=C3C1=NC([N-]1)=C(C=CC=C3)C3=C1N=C([N-]1)C3=CC=CC=C3C1=N2 RBTKNAXYKSUFRK-UHFFFAOYSA-N 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000553 poly(phenylenevinylene) Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- TVIVIEFSHFOWTE-UHFFFAOYSA-K tri(quinolin-8-yloxy)alumane Chemical compound [Al+3].C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1 TVIVIEFSHFOWTE-UHFFFAOYSA-K 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- H01L31/12—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 structurally associated with, e.g. formed in or on a common substrate with, one or more electric light sources, e.g. electroluminescent light sources, and electrically or optically coupled thereto
-
- 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
- H05B33/14—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of the electroluminescent material, or by the simultaneous addition of the electroluminescent material in or onto the light source
-
- 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
- H05B33/26—Light sources with substantially two-dimensional radiating surfaces characterised by the composition or arrangement of the conductive material used as an electrode
-
- 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
- H10K50/805—Electrodes
- H10K50/81—Anodes
- H10K50/814—Anodes combined with auxiliary electrodes, e.g. ITO layer combined with metal lines
-
- 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
- H10K59/805—Electrodes
- H10K59/8051—Anodes
- H10K59/80516—Anodes combined with auxiliary electrodes, e.g. ITO layer combined with metal lines
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2102/00—Constructional details relating to the organic devices covered by this subclass
- H10K2102/301—Details of OLEDs
- H10K2102/302—Details of OLEDs of OLED structures
- H10K2102/3023—Direction of light emission
- H10K2102/3026—Top emission
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2102/00—Constructional details relating to the organic devices covered by this subclass
- H10K2102/301—Details of OLEDs
- H10K2102/321—Inverted OLED, i.e. having cathode between substrate and anode
-
- 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
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/841—Self-supporting sealing arrangements
-
- 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
- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
- H10K50/865—Arrangements for improving contrast, e.g. preventing reflection of ambient light comprising light absorbing layers, e.g. light-blocking layers
-
- 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
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
-
- 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
- H10K59/10—OLED displays
- H10K59/17—Passive-matrix OLED displays
-
- 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
- H10K59/87—Passivation; Containers; Encapsulations
- H10K59/871—Self-supporting sealing arrangements
-
- 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
- H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light
- H10K59/8792—Arrangements for improving contrast, e.g. preventing reflection of ambient light comprising light absorbing layers, e.g. black layers
Definitions
- the present invention relates to a structure of an organic electroluminescent device (hereinafter referred to as an organic EL in this specification) used as a display device for an information terminal device such as a computer, a mobile phone, and a television, and a method of manufacturing the same.
- an organic electroluminescent device hereinafter referred to as an organic EL in this specification
- the active matrix method using TFT or the like is promising for power-saving organic EL displays, but has the disadvantage that the aperture ratio, which indicates the ratio of the light-emitting area to the display area of the display, is low. As the aperture ratio decreases, the brightness per pixel must be increased to gain display brightness. Then, there is a problem that the driving voltage is increased, the power consumption is increased as a result, and the life is shortened because a load is applied to the organic EL element.
- Fig. 2 there is an example in which the cathode is made transparent in order to emit light from the side opposite to the substrate in the configuration of the organic EL element (device) ( IEEE TRANSACTIONS ON ELECTRON DEVICES, VOL. 44, NO.
- the present invention has been made in view of the above problems, and has as an object to solve the above problems. Particularly, an element configuration which does not lower the aperture ratio or light transmittance even when a switching element is used, and its manufacture. It is an object of the present invention to provide an organic EL device having low power consumption and a long life. Another object is to provide a structure for preventing a decrease in contrast due to reflection of external light without lowering the luminance.
- an organic EL device characterized in that at least a cathode, a light emitting layer, and an anode are laminated on a substrate in this order.
- an organic EL device having a plurality of pixels each on a substrate, wherein each of the plurality of pixels is a region partitioned by a partition wall, and in this region, a plurality of pixels are arranged from the substrate side.
- An organic EL device is provided in which one electrode, a light-emitting layer, and a second electrode are stacked in this order, and light from the light-emitting layer is emitted to the outside from the second electrode side.
- an organic EL device comprising laminating at least a cathode, a light emitting layer, and a transparent anode on a substrate in this order.
- FIG. 1 is a sectional view showing the structure of the organic EL device according to the first embodiment.
- FIG. 2 is a cross-sectional view showing a structure of an organic EL device as a contrast with the first embodiment.
- FIG. 3 is a cross-sectional view illustrating the structure of the organic EL device according to the third embodiment.
- FIG. 4 is a cross-sectional view illustrating a structure of an organic EL device according to a fourth embodiment.
- FIG. 5 is a sectional view showing the structure of the organic EL device according to the seventh embodiment.
- FIG. 6 is a cross-sectional view illustrating a structure of an organic EL device according to the seventh embodiment.
- FIG. 7 is a conceptual diagram showing a planar structure of an organic EL device (display device) according to Embodiment 8.
- FIG. 8 is a sectional view showing the structure of the organic EL device according to the ninth embodiment.
- FIG. 9 is a cross-sectional view showing the structure of the organic EL device according to Embodiment 11. BEST MODE FOR CARRYING OUT THE INVENTION
- a first feature of the present invention is that, in an organic EL device, at least a cathode, a light-emitting layer, and an anode are laminated in this order on a substrate.
- a semiconductor substrate such as silicon, a metal substrate, or the like is used.
- an integrated circuit can be formed on a silicon substrate, and an organic EL element (device) can be formed thereon.
- a hole transport layer and a Z or hole injection layer are provided between the light emitting layer and the transparent anode.
- Examples of the embodiment include, for example, the following aspects.
- the organic EL device having the configuration of the first feature, wherein the cathode is formed of a laminate of at least a conductive material and a metal oxide or fluoride.
- the luminous efficiency of the organic EL device can be further increased.
- An organic EL device having the configuration of the first feature, comprising a plurality of pixels, a cathode corresponding to each pixel group being formed on the substrate, and an insulator between the pixels.
- an auxiliary anode made of a conductive material is formed at a position corresponding to the partition wall made of the insulator at a position corresponding to the partition wall formed of the insulator. apparatus.
- the resistance of the transparent anode which generally has high resistance, can be reduced by using the auxiliary anode, and as a result, an organic EL device that emits light uniformly over the entire surface can be realized.
- An organic EL device having the configuration of the first feature, having a plurality of pixels, wherein a cathode corresponding to each pixel is formed on the substrate.
- An organic EL is characterized in that a pixel spacing wall made of an insulator is formed between pixels, and at least a cathode, a light emitting layer, an anode, and an auxiliary anode are stacked in this order in a pixel. apparatus.
- an auxiliary anode that lowers the resistance of the anode can be added later, and various materials can be used for the auxiliary anode as an effect, and an effect unique to the material can be provided.
- a mask evaporation method, an inkjet method, a printing method, or the like can be used for the patterning of the auxiliary anode.
- the display when the display is viewed from the light emitting side, the light-absorbing auxiliary anode can be seen between the pixels, so that external light is absorbed, the contrast is enhanced, and the display is easy to see.
- An organic EL device having the configuration of the first feature, wherein an active matrix structure including a switching element is provided and laminated on a substrate, and overlaps at least a part of the switching element in plan view.
- An organic EL device wherein a stacked structure of a cathode, a light emitting layer, a positive electrode, and a positive electrode is formed.
- the area of the opening as a pixel can be designed independently of circuits related to switching elements, and as an effect, the opening ratio can be dramatically improved.
- all the electronic circuits required for the device such as the electronic circuit of the mobile terminal, the controller for driving the display, the driver, the power supply circuit, etc., are formed on the semiconductor substrate on the silicon substrate. Since it is possible to provide transistors and the like for driving the organic EL device, it is possible to simultaneously improve the performance of the device and reduce costs.
- An organic EL device characterized in that a protective substrate on which an absorbent layer is formed is positioned and adhered to a pixel and a pixel corresponding portion of the protective substrate via a sealing resin.
- the light absorbing portion can be provided between the pixels separately from the auxiliary anode, the auxiliary anode and the light absorbing material can be optimized. .
- a method for manufacturing an organic EL device comprising laminating at least a cathode, a light-emitting layer, and an anode on a substrate in this order.
- a hole transport layer and a Z or a hole injection layer are provided on the light emitting layer, and subsequently, an anode can be formed.
- At least an insulating pixel spacing wall is formed on a substrate, and then a reflective cathode material is deposited on the entire surface.
- the cathode and the auxiliary anode on the partition are separated by the step of the partition, and the cathode and the auxiliary electrode are separated.
- a method for manufacturing an organic EL device comprising: forming at least a light-emitting layer and an anode in a region partitioned by the partition in this order.
- the patterning of the auxiliary anode is not required, and the cost can be reduced.
- an insulating pixel spacing wall material is applied and baked on the entire surface of the substrate, and a material to be an auxiliary anode is formed on the entire surface, and then the auxiliary material is formed by photolithography.
- the layer of the anode material is subjected to pattern etching, the layer of the pixel-interval wall material thereunder is then subjected to pattern etching, and the partition layer is fully baked. Thereafter, at least light is emitted in a region defined by the partition.
- a method for manufacturing an organic EL device comprising laminating a layer and an anode in this order.
- the patterning of the pixel spacing wall and the auxiliary anode can be performed simultaneously.
- FIG. 1 shows a cross section of the organic EL device of the present embodiment.
- the cathode 2 is formed on the substrate 1.
- the light emitting layer 3 is formed, and then the hole injection layer 4 is formed.
- an anode 5 is formed, and a sealing layer (not shown) is further formed.
- the substrate 1 used here in addition to a glass substrate, a metal, a semiconductor, a plastic, or the like can be used, and an opaque substrate can also be used.
- the cathode 2 used here aluminum, magnesium, lithium, calcium, an alloy of these metals, or a laminate of these metals (in this case, one having a low work function is arranged on the light emitting layer side) can be used.
- a polymer material or a low molecular material can be used.
- PPV polydioctylfluorene, polyfluorene, Alq3, DPVBi, and the like.
- hole injection layer Z and the hole transport layer 4 used here general materials such as the strength of Bytron manufactured by Bayer, low molecular weight materials TPD, MTDATA, and copper phthalocyanine can be used.
- IDIXO sold by Idemitsu Kosan Co., Ltd., or the like can be used.
- IDIXO is advantageous because sufficient conductivity can be obtained even when the film is formed at room temperature.
- thermosetting epoxy resin was used for sealing
- ultraviolet curable resin is also used. It is also effective to use a protective substrate together.
- light can be emitted to the side opposite to the substrate when viewed from the light emitting layer, so that an opaque material can be used for the substrate side.
- a semiconductor substrate such as silicon, a metal substrate, or the like is used.
- an integrated circuit can be formed on a silicon substrate, and an organic EL device (device) can be built on it.
- the cathode is made of a laminate of at least one kind of conductive material and a metal oxide or fluoride.
- aluminum was formed as a cathode, followed by patterning through a photolithography process and oxygen plasma treatment. As a result, a 20 ⁇ oxide layer was formed on the surface.
- the remaining steps of Embodiment 1 are performed using this substrate with a cathode, and When the device was created, the luminous efficiency was twice (0.1 m / W) of Example 1.
- the luminous efficiency was 0.51 m / W.
- the light emitting layer 3 used here was a polyfluorene-based material, and was formed by spin coating.
- spintron of Bytron manufactured by Bayer was used.
- IDIXO was used for the anode 5.
- the structure shown in FIG. 3 is such that a cathode group 2 corresponding to a light emitting pixel group is formed on a substrate 1, and a pixel spacing wall 6 made of an insulator is formed between the light emitting pixel groups.
- an auxiliary anode 7 made of a conductive material is formed on the pixel spacing wall 6 in substantially the same pattern as the pixel spacing wall 6.
- the pixel spacing wall 6 was formed and patterned with polyimide, and then tantalum was formed to a thickness of 1000 ⁇ , and the same pattern as the pixel spacing wall 6 was patterned by photolithography.
- a 20 angstrom film of lithium fluoride is formed on the entire surface, and then three types of polyfluorene-based materials that emit red, green, and blue light as the light emitting layer 3 are dissolved in isodurene, and red, green, and blue are formed by an inkjet method.
- a hole injection layer 4 a Bytron manufactured by Bayer was patterned into each pixel by an inkjet method.
- ID IXO manufactured by Idemitsu Kosan Co., Ltd. was formed by sputtering. Furthermore, sealing was performed with an epoxy-based sealing material 8 and a protective substrate 9. When a voltage was independently supplied to each pixel of the organic EL device created in this manner in red, blue and green, a uniform color image could be observed in response to the applied voltage.
- the sealing material the materials described in Embodiment 1 can be used.
- As a film formation method, an ink jet method, a mask evaporation method, a printing method, or the like can be used.
- Eighteen layers or a laminated structure of ITO and A1 A layer of gold, calcium, aluminum, a layer of these layers, a co-deposited layer of Mg and silver, etc. are provided in a predetermined thickness at the position of the anode 5 to form a transparent layer.
- the auxiliary anode 7 is used as an auxiliary layer of the cathode. .
- a cathode group corresponding to a light-emitting pixel group is formed on the substrate, and a pixel spacing wall made of an insulator is formed between the light-emitting pixel groups.
- a pixel spacing wall made of an insulator is formed between the light-emitting pixel groups.
- the cathode, the light-emitting layer An example is shown in which a transparent anode and an auxiliary anode are stacked in this order.
- FIG. 4 shows a cross-sectional structure of the organic EL device of the present embodiment.
- the pixel spacing wall 6 was formed by polyimide film formation and patterning.
- calcium fluoride is deposited on the entire surface in a thickness of 20 angstroms, and then three kinds of low-molecular materials that emit red, green, and blue light as the light-emitting layer 3 are applied to the red, green, and blue pixels by mask evaporation. Each was formed by patterning.
- TPD was deposited as a hole-introducing layer 4 and then MTD ATA was deposited on the entire surface.
- IDIXO manufactured by Idemitsu Kosan Co., Ltd. was sputtered.
- tantalum was vapor-deposited on a mask with a thickness of 100 ⁇ and puttering was performed. Further, sealing was performed with an epoxy-based sealing material 8 and a protective substrate 9.
- the cathode As the cathode, luminescent material, hole injection material, anode, and auxiliary anode sealing material used here, the materials described in Embodiment 1 can be used.
- an inkjet method, a printing method, or the like can be used as a film formation method.
- a mask evaporation method, an inkjet method, a printing method, or the like can be used.
- the layer at the cathode 2 is used as an anode by setting the layer at the site of the cathode 2 and the layer at the site of the anode 5 to a specific material, thickness, and the like, respectively. Also, by operating and driving the layer at the position of the anode 5 as a cathode, light can be emitted from the light emitting layer to the outside through the protective substrate. ' (Embodiment 5)
- auxiliary anode is a conductive material having a light absorbing property.
- chromium was used as the auxiliary electrode 7 instead of tantalum.
- the reflectivity of chromium was 60%, the reflectivity of external light was reduced and the improvement of contrast was recognized.
- the light-absorbing conductive material in addition to the above-described chromium, a high-molecular conductive material such as Bytron or Polyaniline manufactured by Bayer Corporation, or carbon can be used in the same manner.
- auxiliary anode is a conductive material having light absorbency, particularly carbon.
- carbon was used as the auxiliary electrode 7 instead of tantalum.
- the film was formed by a mask evaporation method. As a result, the reflectance of external light from between pixels is almost eliminated, and the contrast is dramatically increased.
- the light-absorbing conductive material besides carbon, a polymer conductive material such as Byrron or Polyaniline manufactured by Bayer, chromium, or the like can be used in the same manner.
- an active matrix structure including a switching element is stacked on a substrate, and a cathode, a light emitting layer, and an anode are arranged so that at least the active matrix structure, particularly at least a part of the switching element, overlaps in plan view.
- FIG. 5 shows a cross-sectional structure of the organic EL device of the present embodiment.
- the structure shown in the figure is based on the structure shown in Fig. 3, with a thin film transistor (hereinafter referred to as TFT) as a switching element added to the substrate.
- TFT thin film transistor
- FIG. 6 shows that an anode, a cathode, and an anode are formed on a substrate in this order, and a region of a TFT element 10 as a switching element is formed below the pixel spacing wall 6 in a plan view.
- 1 shows a cross-sectional structure of an organic EL device arranged so as to substantially overlap.
- FIG. 5 similar to FIG. 3, above the substrate on which the TFT element 10 is formed.
- a light-emitting pixel structure (a stacked structure of a cathode 2, a light-emitting layer 3, and an anode 5) having a configuration (an opening parting part 11 is added) was produced.
- an organic EL device including the light emitting pixel structure shown in FIG. 6 was manufactured.
- the organic EL device having the structure shown in FIG. 5 was driven to emit light to the anode 5 side, and the organic EL device having the structure shown in FIG. 6 was driven to emit light to the substrate 1 side.
- the aperture ratio that can function as a light emitting layer could be improved (opening ratio 70%).
- the area of the pixel opening can be designed independently of a switching element such as a TFT circuit, and the opening ratio can be drastically improved.
- the layer of the cathode 2 and the layer of the anode 5 are each made of a specific material, thickness, etc. It is also possible to emit light from the light-emitting layer to the outside through the protective substrate by functioning and driving the layer of the part 2 as an anode and the layer of the part of the anode 5 as a cathode.
- the layer at the portion of the cathode 2 and the layer at the portion of the anode 5 are each made to have a specific material, thickness, and the like.
- the layer in the region of the cathode 2 as an anode and the layer in the region of the anode 5 as a cathode light can be emitted from the light emitting layer to the outside through the protective substrate.
- the opening ratio can be improved as in the structure shown in FIG.
- the present embodiment is characterized in that a semiconductor substrate on which an integrated circuit is formed is used as a substrate to be used.
- a semiconductor substrate on which an integrated circuit is formed is used as a substrate to be used.
- an example is shown in which an electronic circuit for a mobile phone, a controller for driving a display, a driver, and a transistor for driving an organic EL device are formed on a silicon substrate, and an organic EL device is formed in a display portion.
- FIG. 7 shows a conceptual diagram of a silicon substrate on which the organic EL device of the present embodiment is formed.
- ⁇ L display section 12 with such an organic EL element (pixel structure) arranged in an XY matrix is provided, and X driver 14 and ⁇ driver 13 for matrix drive of the display section are provided around it. Further, a controller 15, an electronic circuit 16, and a power supply circuit 17 are mounted and connected to a power supply and a switch. With this fairness, all the circuits can be mounted on a single silicon substrate, and externally controlled by a switch to realize a function as a mobile phone.
- a protective substrate having a light-absorbing layer formed in a portion corresponding to between pixels is connected to the pixel on the substrate and the protective substrate via a sealing resin.
- An example is shown in which the pixels are bonded together while being aligned with the pixel corresponding part.
- FIG. 8 shows a cross-sectional structure of the organic EL device of the present embodiment.
- the sealing material 8 is applied to the substrate formed up to the anode in the third embodiment, and the light absorbing layer 19 is formed so as to correspond to between pixels.
- the protective substrate 9 is bonded and fixed while being positioned.
- the organic EL device thus produced can exhibit sufficient display uniformity due to the effect of the auxiliary anode, and can also efficiently attenuate the reflection of external light, and perform display with good contrast. Become.
- At least a cathode, a light emitting layer, a hole transport layer, and a or a hole injection layer, and a transparent anode are laminated in this order on an organic EL device, in particular, a device having a structure shown in FIG.
- an organic EL device in particular, a device having a structure shown in FIG.
- UV ozone treatment can also be used as a method for making the surface of the light emitting layer hydrophilic.
- a highly polar solution such as a diphosphate solution is exemplified.
- At least an insulating pixel spacing wall is formed on the substrate, and then a reflective cathode is formed on the entire surface, and at the same time, the cathode and the auxiliary anode on the partition are separated due to the step of the partition.
- a light emitting layer and a transparent anode are laminated in this order in the pixel ⁇ ⁇ is shown.
- FIG. 9 shows a cross-sectional structure of the organic EL device of the present embodiment.
- the angle of the pixel spacing wall 6 is set to protrude, the patterning will be more reliable, but when forming up to the anode 5 to be formed later. Optimal because the pixel spacing wall 6 will break. Is required.
- an insulating pixel spacing wall material is applied and baked on the entire surface of the substrate, and then a material serving as an auxiliary anode is formed on the entire surface, and photolithography is performed.
- the auxiliary anode layer is patterned and etched, then the pixel spacing wall layer below is patterned and etched, and the pixel spacing wall layer is fully baked, and then at least the light emitting layer and the transparent anode are included in the pixel in this order.
- the following shows an example of stacking. Specifically, an element having the structure shown in FIG. 3 was created.
- the cathode 2 was formed on the substrate 1 by patterning.
- a polyimide solution was applied as a material of the insulating pixel spacing wall 6 to the entire surface of the substrate and calcined.
- tantalum to become the auxiliary anode 7 was sputtered over the entire surface to a thickness of 1000 angstroms.
- a resist was applied and exposed.
- the tantalum was etched.
- the polyimide was etched.
- the resist was peeled off, and the main baking of polyimide was performed to complete the structure of the pixel spacing wall 6 and the auxiliary anode 7.
- the pixel spacing wall material and the auxiliary electrode material used in the present embodiment can be similarly used as long as they can be patterned in the photolithography process.
- the structure in which the cathode, the light emitting layer, and the anode are laminated in this order from the substrate side of the organic EL device allows the aperture ratio to be increased even when an active element is used.
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Description
Claims
Priority Applications (3)
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DE60140784T DE60140784D1 (de) | 2000-02-25 | 2001-02-26 | Organische elektrolumineszente vorrichtung und verfahren zu dessen herstellung |
EP01906318A EP1191823B1 (en) | 2000-02-25 | 2001-02-26 | Organic el device and method of manufacture thereof |
JP2001562061A JP4144687B2 (ja) | 2000-02-25 | 2001-02-26 | 有機el装置の製造方法 |
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JP2000-50165 | 2000-02-25 | ||
JP2000050165 | 2000-02-25 |
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WO2001063975A1 true WO2001063975A1 (fr) | 2001-08-30 |
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PCT/JP2001/001428 WO2001063975A1 (fr) | 2000-02-25 | 2001-02-26 | Dispositif organique el et procede de fabrication |
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US (3) | US6869635B2 (ja) |
EP (1) | EP1191823B1 (ja) |
JP (1) | JP4144687B2 (ja) |
KR (1) | KR100476572B1 (ja) |
CN (1) | CN1242650C (ja) |
DE (1) | DE60140784D1 (ja) |
TW (2) | TWI282697B (ja) |
WO (1) | WO2001063975A1 (ja) |
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EP1191823B1 (en) | 2009-12-16 |
EP1191823A4 (en) | 2006-04-05 |
TWI249363B (en) | 2006-02-11 |
US20050134171A1 (en) | 2005-06-23 |
EP1191823A1 (en) | 2002-03-27 |
CN1242650C (zh) | 2006-02-15 |
KR100476572B1 (ko) | 2005-03-18 |
TWI282697B (en) | 2007-06-11 |
US20020033664A1 (en) | 2002-03-21 |
US7427832B2 (en) | 2008-09-23 |
US20080258617A1 (en) | 2008-10-23 |
KR20020019002A (ko) | 2002-03-09 |
DE60140784D1 (de) | 2010-01-28 |
JP4144687B2 (ja) | 2008-09-03 |
US7898170B2 (en) | 2011-03-01 |
US6869635B2 (en) | 2005-03-22 |
CN1363201A (zh) | 2002-08-07 |
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