WO2015118932A1 - Dispositif d'éclairage électroluminescent organique et procédé d'éclairage - Google Patents

Dispositif d'éclairage électroluminescent organique et procédé d'éclairage Download PDF

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Publication number
WO2015118932A1
WO2015118932A1 PCT/JP2015/051215 JP2015051215W WO2015118932A1 WO 2015118932 A1 WO2015118932 A1 WO 2015118932A1 JP 2015051215 W JP2015051215 W JP 2015051215W WO 2015118932 A1 WO2015118932 A1 WO 2015118932A1
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organic
light
organic electroluminescence
information
light emitting
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PCT/JP2015/051215
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English (en)
Japanese (ja)
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川原　雄介
壽人 緒方
一晃 米田
陽 石垣
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コニカミノルタ株式会社
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Priority to JP2015560913A priority Critical patent/JPWO2015118932A1/ja
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    • 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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/60—Circuit arrangements for operating LEDs comprising organic material, e.g. for operating organic light-emitting diodes [OLED] or polymer light-emitting diodes [PLED]
    • 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
    • H10K59/90—Assemblies of multiple devices comprising at least one organic light-emitting element
    • 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
    • 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
    • H10K59/221—Static displays, e.g. displaying permanent logos
    • 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
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/32—Stacked devices having two or more layers, each emitting at different wavelengths
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Definitions

  • the present invention relates to a flexible surface light emitter including an organic electroluminescence element, an organic electroluminescence illumination device including light emission control means for controlling light emission of the flexible surface light emitter by external information, and the organic electroluminescence illumination device. It is related with the illumination method which drives.
  • An illumination device using a planar light emitter equipped with an organic electroluminescence element (hereinafter abbreviated as “organic EL element”) as an illumination light source has attracted attention.
  • An organic electroluminescence device generally has a configuration in which an organic functional layer group including a light emitting layer containing a light emitting organic compound is sandwiched between an anode and a cathode, and emits light by applying a voltage between the electrode pair. It is used in various fields such as electrical decoration, light sources for signs, light emitting posters, and lighting devices.
  • an illumination mechanism includes a flexible substrate and a solid light emitting device on the surface thereof, and a part of the panel portion of the light emitting device includes a shape matching mechanism that can selectively bend the light emitting surface.
  • Patent Document 2 Japanese Patent Document 2.
  • the organic electroluminescence element since at least two sides of the organic electroluminescence element are fixed by the support structure, the organic electroluminescence element is extremely difficult to move, and based on external information. There is no description of controlling the light emission of the organic electroluminescence element by using the light emission control means to cause the toned light emission, and the lighting device is not attractive due to insufficient presentation and decoration as a lighting device. .
  • the control unit extracts the light emission mode data from the light emission mode data recording unit in accordance with the control input, and the planar light emitting unit is set so as to have the light emission mode indicated by the extracted light emission mode data.
  • a driving light emission control method is disclosed. The method described in Patent Document 3 is to illuminate the illumination object under appropriate conditions to the last, and as input information, the method mainly discloses the attributes of the illumination object, and based on external information, There is no description that the light emission control means controls the light emission of the organic electroluminescence element capable of color adjustment to cause the color adjustment light emission.
  • Patent Document 4 discloses a display device in which a plurality of pixels composed of organic electroluminescence elements are arranged and the display luminance of the display unit is adjusted based on light emission luminance information and external light luminance information.
  • the method described in Patent Document 4 is a method for improving visibility by controlling the luminance of the display device according to the brightness of the surroundings. There is no description of controlling the light emission of the organic electroluminescence element by the control means so that the toned light is emitted.
  • the present invention has been made in view of the above-mentioned problems, and the problem to be solved is to emit light from a flexible surface light emitter including an organic electroluminescence element capable of toning light emission, which is capable of natural and supple movement.
  • a flexible surface light emitter including an organic electroluminescence element capable of toning light emission, which is capable of natural and supple movement.
  • an organic electroluminescence lighting device (hereinafter also referred to as an organic EL lighting device) characterized by including an effect data storage unit, a signal control circuit unit, and an organic electroluminescence element control circuit unit.
  • Organic electroluminescence lighting with lighting performance and decoration as an elegant object by toning light emission of organic electroluminescence elements in conjunction with information (for example, sound information, light information, temperature information, etc.)
  • information for example, sound information, light information, temperature information, etc.
  • An organic electroluminescence illumination device comprising at least one flexible surface light emitter including an organic electroluminescence element that emits toned light based on input information on a resin base material, (A) an information input unit for inputting predetermined input information; (B) An effect data storage unit that stores effect data for controlling and producing the toned light emission, and has a function of selecting the effect data and outputting it as an electrical signal based on the input information; , (C) a signal control circuit unit that selects and controls an organic electroluminescence element that inputs an electrical signal of the effect data output from the effect data storage unit; (D) an organic electroluminescence element control circuit unit that controls at least a hue and luminance of light emitted from the organic electroluminescence element based on an electric signal from the signal input control circuit;
  • An organic electroluminescent lighting device comprising:
  • organic electroluminescence lighting device according to claim 1, wherein the organic electroluminescence element has a tandem configuration in which a plurality of light emitting layer units each capable of controlling toned light emission are stacked in the vertical direction. .
  • the organic electroluminescence lighting device according to claim 1 or 2, wherein the input information for controlling light emission of the organic electroluminescence element is sound information, light information, or temperature information.
  • It has a light emitting unit group in which two or more flexible surface light emitters are arranged in parallel on a long belt-like base material, and the two or more flexible surface light emitters are individually controlled toned light emission.
  • the organic electroluminescence illumination device according to any one of Items 1 to 4, wherein the organic electroluminescence illumination device is capable of performing.
  • an illumination method for at least one flexible surface light emitter including an organic electroluminescence element that emits toned light based on input information, (A) information input means for inputting predetermined input information; (B) effect data storage means for storing effect data for controlling and producing the toned light emission and having a function of selecting the effect data and outputting it as an electrical signal based on the input information; (C) a signal control means for selecting and controlling an organic electroluminescence element for inputting an electric signal of the effect data output from the effect data storage unit; (D) by organic electroluminescence element control means for controlling at least the hue and luminance of the light emitted from the organic electroluminescence element based on the electric signal from the signal control means, An illumination method comprising illuminating by controlling light emission of the organic electroluminescence element that emits toned light.
  • the input information for controlling light emission of the flexible surface light emitter is sound information, light information, or temperature information.
  • It has a light emitting unit group in which two or more flexible surface light emitters are arranged in parallel on a long belt-like base material, and the two or more flexible surface light emitters are individually controlled toned light emission.
  • a flexible surface light emitter capable of natural and supple movement is provided, and toning light emission based on input information is provided, thereby providing lighting performance and decoration as an elegant object.
  • An organic electroluminescence lighting device and a lighting method can be provided.
  • the conventional lighting method does not have the function of toning light emission in conjunction with external information that fluctuates irregularly as environmental conditions such as music, light, or temperature, but the lighting performance as a lighting device It was poor and decorative.
  • organic EL lighting device of the present invention external information that fluctuates irregularly, for example, audio information (for example, music), light information such as the amount of light and hue of the space where the lighting device is installed, temperature information, and the like.
  • audio information for example, music
  • light information such as the amount of light and hue of the space where the lighting device is installed
  • temperature information such as the amount of light and hue of the space where the lighting device is installed
  • information and based on the input information, select desired production data from various production data stored in the personal computer in advance.
  • the block diagram which shows an example of the method of controlling light emission of the organic electroluminescent illuminating device of this invention
  • the block diagram which shows an example of the method of controlling light emission of the organic electroluminescent illuminating device of this invention which comprised the some flexible surface light-emitting body.
  • the schematic diagram which shows an example of the arrangement pattern of the organic EL element on a flexible surface light-emitting body The schematic diagram which shows an example which installed the movable means with respect to the organic electroluminescent illuminating device of this invention.
  • the schematic diagram which shows an example of the installation method of the organic electroluminescent illuminating device of this invention The schematic diagram which shows another example of the installation method of the organic electroluminescent illuminating device of this invention.
  • the organic electroluminescent lighting device of the present invention is an organic electroluminescent lighting device including at least one flexible surface light emitter including an organic electroluminescent element that emits toned light based on input information, and includes: An information input unit for inputting input information; and (b) storing effect data for controlling and producing the toned light emission, and selecting the effect data based on the input information and outputting it as an electrical signal
  • An effect data storage unit having a function to perform, (c) a signal control circuit unit for selecting and controlling an organic electroluminescence element for inputting an electrical signal of effect data output from the effect data storage unit, and (d) the signal Based on the electric signal from the control circuit part, the organic electroluminescence element Characterized in that it comprises at least hue and the organic electroluminescence element control circuit for controlling the brightness of the light to emit light.
  • a plurality of light emitting layer units are stacked in the vertical direction from the viewpoint that the effects of the present invention can be further manifested.
  • the tandem configuration is preferable from the viewpoint that a surface light emitter can be formed with a simpler layer configuration and stable toned light emission is possible.
  • the input information for controlling the light emission of the organic electroluminescence element is sound information, light information, or temperature information, it is possible to accurately grasp the change in the installation environment and produce realistic lighting. From the viewpoint of being able to.
  • the organic electroluminescence element having a transparent anode mainly composed of silver and having a thickness in the range of 2 to 20 nm has high light emission uniformity and light extraction efficiency, and can obtain stable light emission. It is a preferable aspect from a viewpoint which can be performed.
  • the light emitting unit group in which two or more flexible surface light emitters are arranged in parallel on a long belt-like base material, and the two or more flexible surface light emitters are independently toned light emission.
  • the illumination method of the present invention is an illumination method of at least one flexible surface light emitter provided with an organic electroluminescence element that emits toned light based on input information on a resin substrate, and (a) a predetermined input An information input means for inputting information; and (b) effect data for controlling and producing the toned light emission is stored, and the effect data is selected and output as an electric signal based on the input information.
  • Effect data storage means having a function;
  • signal control means for selecting and controlling an organic electroluminescence element for inputting an electrical signal of effect data output from the effect data storage means; and (d) the signal control means.
  • the organic electroluminescence element control unit that, characterized by illuminating by controlling the light emission of the organic electroluminescence element of the toning light.
  • the flexible surface light emitter or the light emitting unit is illuminated by flickering with external means, or the flute or drive motor is used as the external means to change the installation environment (for example, sound , Light, temperature, and the like), and an organic EL lighting device having a lighting effect and decoration as an elegant and dynamic object can be realized.
  • ⁇ is used to mean that the numerical values described before and after it are included as a lower limit value and an upper limit value.
  • a flexible surface light emitter means the structure which comprises the organic electroluminescent element which carries out toned light emission based on input information on a resin base material, and an organic electroluminescent element (OLED) is mentioned later.
  • 3 to 5 strictly refers to the configuration range from the cathode 51 to the anode 54, but for the sake of convenience, the resin base material may be included as a part of the constituent material of the organic electroluminescence element. .
  • the numbers and symbols described in parentheses after each constituent path indicate the symbols described in each drawing.
  • the organic EL lighting device of the present invention is An organic electroluminescence illumination device comprising at least one flexible surface light emitter including an organic electroluminescence element that emits toned light based on input information on a resin base material, (A) an information input unit for inputting predetermined input information; (B) An effect data storage unit that stores effect data for controlling and producing the toned light emission, and has a function of selecting the effect data and outputting it as an electrical signal based on the input information; (C) a signal control circuit unit that selects and controls an organic electroluminescence element that inputs an electrical signal of the effect data output from the effect data storage unit; (D) an organic electroluminescence element control circuit unit that controls at least a hue and luminance of light emitted from the organic electroluminescence element based on an electric signal from the signal control circuit unit; By each of the above means, the light emission of the organic electroluminescence element having a configuration capable of toning light emission is controlled and illuminated.
  • FIG. 1 is a block diagram showing an example of a method for controlling light emission of the organic EL lighting device (1) of the present invention, specifically, a method for controlling light emission of a single toning type organic EL element according to input information. is there.
  • music information is set as input information for producing light emission of an organic EL element (OLED) having a dimming function, and sound information of an environment where the organic EL lighting device (1) is installed.
  • Optical information, temperature information, etc. are input to the information input unit (2) via an external information detection means (not shown) such as a light detection sensor such as a sound collecting microphone or a photodiode or a temperature detection sensor, for example.
  • an external information detection means such as a light detection sensor such as a sound collecting microphone or a photodiode or a temperature detection sensor, for example.
  • a program time code, RGB light emission control
  • PC effect data storage unit
  • the memory unit of the effect data storage unit (3) is configured by, for example, a semiconductor memory such as a DRAM, SRAM, EPROM, EEPROM, or flash memory, and the light emission pattern data of the organic EL element (OLED) is stored in advance.
  • a semiconductor memory such as a DRAM, SRAM, EPROM, EEPROM, or flash memory
  • the PC constituting the effect data storage unit (3) controls the light emission conditions of the organic EL element (OLED) in time series corresponding to the input information input from the information input unit (2).
  • a desired number of production data composed of a time code for setting, channel number setting information of an organic EL element (OLED) to be used, and RGB light emission control information are stored.
  • the information input unit (2) and the effect data storage unit (3) may be installed in the same personal computer, for example, and managed and controlled integrally.
  • the selected effect data (time code, channel of the organic EL element to be used, RGB control information) is input to the signal control circuit unit (4) as an electrical signal at an appropriate timing.
  • the signal control circuit unit (4) sets, for the organic EL element control circuit unit (5), RGB values for controlling at least the hue and luminance of the light emitted from the organic electroluminescence element.
  • the organic EL element control data RGB values for controlling the hue and brightness
  • OLED organic EL element
  • the organic EL lighting device (1) of the present invention has a light emitting unit group in which two or more flexible surface light emitters are arranged in parallel, and the two or more flexible surface light emitters are independently adjusted. It is a preferred embodiment that color emission can be controlled.
  • FIG. 2 is a block diagram showing an example of a method for controlling light emission of the organic EL lighting device (1) of the present invention having a plurality of flexible surface light emitters.
  • FIG. 1 the method for controlling the light emission of the organic EL element (OLED) included in the single flexible surface light emitter has been described.
  • OLED organic EL element
  • the basic control method of the block diagram shown in FIG. 2 is the same as that in FIG. 1, and input information such as music information and external environment information for controlling the light emission of the flexible surface light emitter is input to the information input unit (2 ), The input information is input to the effect data storage unit (3), and the selected effect data (time code information, channel information of the organic EL element to be used, light emission such as the hue and luminance of the organic EL element) is input. RGB information to be controlled) is transmitted as an electrical signal to the signal control circuit section (4).
  • OLED control data RGB light emission control data
  • OLED (A) to OLED (Z) organic EL elements (OLED) are toned to emit light under specified conditions (hue, brightness, etc.), so that lighting performance and decoration can be achieved as elegant and dynamic objects.
  • the organic EL lighting device can be provided.
  • the flexible surface light emitter according to the present invention includes an organic EL element having a configuration capable of toning light emission on a resin base material.
  • the organic EL element having a configuration capable of toning light emission according to the present invention is an organic EL element having a function of controlling hue (color temperature) and brightness (brightness) in the same organic EL element. .
  • hue color temperature
  • brightness brightness
  • blue light emission, red light emission, green light emission, magenta light emission, cyan light emission, yellow light emission, white light emission and the brightness of each emission color can be controlled.
  • An organic EL element having a tandem configuration in which the light emitting layer units are stacked in the vertical direction is preferable, and desired toning can be achieved by controlling the light emission conditions of each light emitting layer.
  • FIG. 3 is a schematic cross-sectional view showing an example of a tandem organic EL element (OLED) having a toning function applicable to the organic EL lighting device of the present invention.
  • OLED tandem organic EL element
  • the organic EL element has a blue light emitting layer unit (BLU), a red light emitting layer unit (RLU), and a green light emitting layer unit (GLU) laminated in the vertical direction on a resin base material (F).
  • BLU blue light emitting layer unit
  • RLU red light emitting layer unit
  • GLU green light emitting layer unit
  • the blue light emitting layer group has a structure in which a blue light emitting layer unit (BLU) is sandwiched between a pair of counter electrodes, a first electrode for BLU (anode, 51B) and a second electrode for BLU (cathode, 54B).
  • BLU blue light emitting layer unit
  • a first electrode for BLU anode, 51B
  • a second electrode for BLU cathode, 54B
  • V1 blue light emitting layer unit
  • GR ground
  • the first electrode for RLU anode, 51R
  • red light emitting layer unit RLU
  • RLU red light emitting layer unit
  • SL1 insulating layer
  • a red light emitting layer group in which a second electrode (cathode, 54R) is stacked is formed, and red light is emitted by applying a voltage V2 between the pair of counter electrodes.
  • the first electrode (anode, 51R) is connected to the ground (GR).
  • the first electrode (anode, 51G) for GLU and the green light emitting layer unit (GLU) are configured in the same configuration via the insulating layer (SL2). ), A red light emitting layer group in which second electrodes (cathode, 54G) for GLU are stacked is formed, and green light is emitted by applying a voltage V3 between the counter electrodes.
  • the first electrode (anode, 51G) is connected to the ground (GR).
  • the first electrode (anode, 51B, 51R, 51G) and the second electrode (cathode, 54B, 54R, 54G) are all light transmissive.
  • 1 shows a configuration example 1 of a double-sided light emitting organic EL element that is formed of a transparent electrode and extracts emitted light L from both sides.
  • h is a light emitting point
  • L is emitted light.
  • the toning type organic EL element (OLED) shown in FIG. 3 has a large number of electrodes and constituent layers, and is somewhat problematic from the viewpoint of reducing the thickness of the organic EL element.
  • FIG. 4 is a schematic cross-sectional view showing another example (configuration example 2) of a tandem organic EL element having a toning function applicable to the organic EL lighting device (1) of the present invention.
  • the color-type organic EL element (OLED) having the configuration shown in FIG. 3 has a problem that the number of constituent layers increases and the film becomes thicker, which solves the problem of the first configuration example and realizes a thin-film organic EL element. Therefore, as a tandem organic EL element having a toning function applied to the present invention, a tandem organic EL element having a toning function configured as shown in FIG. 4 is a more preferable embodiment. is there.
  • the organic EL element includes a first electrode (anode, 51), a blue light emitting layer unit (BLU), a first intermediate electrode (M1), and a red light emitting layer unit on a transparent substrate (F). (RLU), the second intermediate electrode (M2), the green light emitting layer unit (GLU), and the second electrode (cathode, 54) are stacked.
  • a voltage V1 is applied between the first electrode (anode 51) and the first intermediate electrode (M1) to cause the blue light emitting layer unit (BLU) to emit light.
  • a voltage V2 is applied between the first intermediate electrode (M1) and the second intermediate electrode (M2) to cause the red light emitting layer unit (RLU) to emit light, and the second intermediate electrode (M2) and the second electrode (cathode, 54) During this period, the voltage V3 is applied to cause the green light emitting layer unit (GLU) to emit light.
  • the first electrode (anode, 51), the first intermediate electrode (M1), and the second intermediate electrode (M2) are configured by transparent electrodes, and the second electrode (cathode, 54) is formed using a metal electrode with low light transmittance, and the light extraction side is the transparent substrate (F) side.
  • h is a light emitting point
  • L is emitted light.
  • the organic EL element via the OLED control circuit unit (5) based on the RGB information (OLED control data) among the effect data selected by the input information.
  • RGB information OLED control data
  • toned light emission can be achieved. For example, if only the applied voltage V1 is applied, only blue light emission and only the applied voltage V2 are applied. For example, red light is emitted, green light is emitted when only the applied voltage V3 is applied, cyan light is emitted when the applied voltage V1 and the applied voltage V3 are applied, and magenta light emission is applied when the applied voltage V1 and the applied voltage V2 are applied. If the applied voltage V3 is applied, yellow light is emitted, and if all of the applied voltages V1, V2, and V3 are applied, white light is expressed. It can be.
  • FIG. 5 is a schematic cross-sectional view showing another example (Configuration Example 3) of a tandem organic EL element having a color matching function applicable to the organic EL lighting device of the present invention.
  • the light extraction side electrode is a transparent anode mainly composed of silver and having a thickness in the range of 2 to 20 nm.
  • the organic EL element (OLED) shown in FIG. 5 is different from the structure shown in FIG. 4 in that the first electrode (anode 51), the first intermediate electrode (M1), and the second intermediate electrode (M2) are made of transparent thin silver.
  • the example which comprised with the electrode is shown and the organic EL element (OLED) can be made still thinner, which is preferable.
  • the first electrode (anode, 51) that is a thin silver electrode mainly composed of silver is a silver atom. It is preferable from the viewpoint of suppressing the aggregation and the formation of mottle and forming a highly uniform transparent electrode (anode).
  • the first intermediate electrode (M1) and the second intermediate electrode (M2) are also constituted by transparent thin-film silver electrodes, and a base layer 52 is provided below each of them. Detailed configurations of the thin silver electrode and the underlayer mainly composed of silver will be described later.
  • organic EL elements having various light emitting surfaces such as a single-sided light emitting type or a double-sided light emitting type can be used.
  • 6A to 6D are schematic cross-sectional views showing various configurations of a flexible surface light emitter applicable to the organic EL lighting device of the present invention.
  • the configuration example shown in FIG. 6A has a configuration in which a flexible surface light emitter (6) sandwiches a single-side light emission type organic EL element (OLED) between two resin base materials (F), and the organic EL element (OLED) ) Is connected to an external power supply power source (not shown) via the wiring (7).
  • OLED organic EL element
  • one electrode of the electrode pair constituting the organic EL element for example, the second electrode (54) is not light as the single-sided light emitting type organic EL element (OLED). It is made of a transmissive material, the other first electrode (51) is made of a transparent electrode, and emits light (L) from the first electrode (51) side.
  • the configuration example shown in FIG. 6B has a configuration in which a flexible surface light emitter (6) sandwiches a double-sided light emitting type organic EL element (OLED) between two resin substrates (F), and the organic EL element (OLED) ) Is connected to an external power supply power source (not shown) via the wiring (7).
  • the double-sided emission type organic EL element (OLED) is configured such that all of the electrode group constituting the organic EL element is formed of a light transmissive transparent electrode, for example, a thin silver electrode. This is a type that emits light (L) emitted from.
  • FIG. 6C shows an example in which a thin film battery (8) is further applied as a power supply source to the configuration shown in FIG. 6A.
  • an organic EL element may be formed on a single resin base material (F).
  • Embodiment of Organic EL Lighting Device >> [Organic EL lighting device having a plurality of flexible surface light emitters]
  • the organic EL lighting device of the present invention has a light emitting unit group in which two or more flexible surface light emitters are arranged in parallel on a long belt-like base material, and the two or more flexible surface light emitters are arranged. It is a preferable embodiment that the toning emission control can be performed independently.
  • FIG. 7 is a schematic view showing an example of a light emitting unit group in which a plurality of flexible surface light emitters are arranged in parallel on a belt-like holding member.
  • each flexible surface light emitter (6) is connected to the OLED control circuit (5) described in FIG. 2 via a conducting wire.
  • a protective member for strengthening the connection may be attached to the connection position.
  • a protective cover made of, for example, a transparent resin is attached to the outside of each flexible surface light emitter (6). Also good.
  • the lighting device is configured by combining two or more light emitting unit groups from the viewpoint of expressing richer presentation and decoration. is there.
  • FIG. 8 is a schematic diagram showing an example of an organic EL lighting device configured by connecting a plurality of light emitting unit groups.
  • a plurality of flexible surface light emitters (6) each having an organic EL element are arranged in parallel along the longitudinal direction on a long belt-like substrate (9).
  • the example which comprises the light emission unit group comprised by combining 3 rows is shown.
  • the number of flexible surface light emitters (6) constituting the light emitting unit group and the number of columns of the light emitting unit group are not particularly limited, but from the viewpoint of exhibiting stunning and decorative properties as an illumination device as an object, for example, A configuration in which about 2 to 5 rows of light emitting unit groups each having a flexible surface light emitter within the range of 15 to 40 are arranged in combination is preferable.
  • each light emitting unit group may be maintained in a streamlined and stable form while being curved.
  • the formation of the flexible surface light emitter and the organic EL element formed thereon is not particularly limited, and can take various shapes as necessary.
  • the organic EL elements can be installed in various arrangements.
  • FIG. 9 shows examples of various arrangement patterns of organic EL elements on the flexible surface light emitter.
  • a pattern a shown in FIG. 9 is an example in which an organic EL element (OLED) is arranged on the entire surface of one flexible surface light emitter (6) constituting the organic EL lighting device 1, and a pattern b is a flexible surface light emission.
  • the organic EL element (OLED) is disposed only in the vicinity of the belt-like substrate (9) of the body (6), and the pattern c is the organic EL element (OLED) only at the tip of the flexible surface light emitter (6).
  • the pattern d a plurality of different types of organic EL elements (OLED) or the same type of organic EL elements (OLED) may be arranged in parallel on one flexible surface light emitter (6). Good.
  • the organic EL element (OLED) formed on the flexible surface light emitter (6) is provided with an organic EL element having a star shape or a hard shape in addition to a rectangle. May be.
  • the first electrode shown in FIG. 4 or FIG. 5 is provided on one resin base material F, respectively. Even if it is a method of laminating the constituent elements from (51) to the second electrode (54) in a predetermined pattern, or on a single resin substrate, for example, as shown in FIG. 4 or FIG.
  • the structure which installed the organic EL element which has from a resin base material (F) to a 2nd electrode (54) may be sufficient.
  • the organic EL lighting device of the present invention may be installed in a fixed state, or may be installed in a configuration having a movable function from the viewpoint of exerting a lively feeling as an object.
  • the installed organic EL lighting device may be moved by applying force from external means.
  • FIG. 10 is a schematic diagram showing an example in which the organic EL lighting device of the present invention is a rotary lighting device using a movable means.
  • an organic EL lighting device (1) configured by connecting a plurality of light emitting unit groups described in FIG. 8 is installed using a suspension member (24) from the ceiling (25), and in the lower part.
  • the resin base material forming the flexible surface light emitter is a thin film, It is possible to create an atmosphere that emits toned light.
  • FIGS. 11A to 11C are schematic views showing an example of a method for installing the organic EL lighting device of the present invention.
  • an installation method of the organic EL lighting device (1) of the present invention for example, a floor mounting method fixed to a stand (20) as shown in FIG. 11A, a method of installing on a wall surface (23) as shown in FIG. 11B, A method of installing from a ceiling (25) as shown in FIG. 11C through a suspension member (24) can be exemplified.
  • the mounted organic EL lighting device (1) is moved back and forth by reciprocating the rotation shaft of the drive motor (22) constituting the drive unit (21) so that the belt-like substrate (9) is attached.
  • a plurality of flexible surface light emitters (6) capable of toning light emission provided above are toned light emission in conjunction with the input information, thereby providing a supple movement, decorativeness and elegance as an indoor object. Can be expressed.
  • the structure of the organic EL element included in the flexible surface light emitter according to the present invention is characterized in that it has a color-adjustable function as exemplified in FIGS. 3 to 5, and includes, for example, a resin substrate and a transparent substrate.
  • the anode has a plurality of light emitting layer units that can be toned, and each of the light emitting layer units of the blue light emitting layer unit (BLU), the red light emitting layer unit (RLU), and the green light emitting layer unit (GLU)
  • BLU blue light emitting layer unit
  • RLU red light emitting layer unit
  • GLU green light emitting layer unit
  • Light emitting layer unit light emitting layer / electron transport layer
  • Light emitting layer unit hole transport layer / light emitting layer / electron transport layer
  • Light emitting layer unit hole transport layer / light emitting layer / hole blocking layer / Electron transport layer
  • Color developing layer unit hole transport layer / light emitting layer / hole blocking layer / electron transport layer / cathode buffer layer
  • Color developing layer unit anode buffer layer / hole transport layer / light emitting layer / Hole blocking layer / electron transport layer / cathode buffer layer and the like.
  • the anode disposed on the resin base material F is a transparent anode having silver as a main component and having a thickness in the range of 2 to 20 nm. 51) is a preferred embodiment. Further, from the viewpoint of improving the uniformity of the thin silver layer when forming the transparent anode (51) mainly composed of silver, the base layer (52) as shown in FIG. 5 is made transparent with the resin base material (F). It is preferable to provide between the anode (51).
  • polyesters such as polyethylene terephthalate (abbreviation: PET) and polyethylene naphthalate (abbreviation: PEN), polyethylene, polypropylene, cellophane, cellulose diacetate, cellulose triacetate ( Abbreviations: TAC), cellulose acetate butyrate, cellulose acetate propionate (abbreviation: CAP), cellulose esters such as cellulose acetate phthalate, cellulose nitrate and their derivatives, polyvinylidene chloride, polyvinyl alcohol, polyethylene vinyl alcohol, Shinji Tactic polystyrene, polycarbonate (abbreviation: PC), norbornene resin, polymethylpentene, polyetherketone, polyimide, polyether Sulfone (abbreviation: PES), polyphenylene sulfide, polysulfones, polyether imide, polyether ketone imide, poly
  • films such as polyethylene terephthalate (abbreviation: PET), polybutylene terephthalate, polyethylene naphthalate (abbreviation: PEN), and polycarbonate (abbreviation: PC) are flexible in terms of cost and availability. It is preferably used as a resin base material.
  • PET polyethylene terephthalate
  • PEN polyethylene naphthalate
  • PC polycarbonate
  • the thickness of the resin substrate according to the present invention is in the range of 3 to 200 ⁇ m, preferably in the range of 3 to 150 ⁇ m, more preferably in the range of 3 to 100 ⁇ m, and particularly preferably 10 Within the range of ⁇ 80 ⁇ m.
  • the resin substrate according to the present invention can also be suitably used as a sealing member (transparent substrate) for organic EL elements.
  • the resin base material may be an unstretched film or a stretched film.
  • the resin base material applicable to the present invention can be manufactured by a conventionally known general film forming method.
  • a solution casting method in which a resin as a material is dissolved in a solvent to form a dope, and then the dope is cast on a metal belt to form a dope can be used.
  • the unstretched resin base material is transported in the direction of the resin base material (vertical axis direction) by a known method such as uniaxial stretching, tenter sequential biaxial stretching, tenter simultaneous biaxial stretching, tubular simultaneous biaxial stretching, or the like. , MD direction), or a stretched resin substrate can be produced by stretching in a direction perpendicular to the conveying direction of the resin substrate (horizontal axis direction, TD direction).
  • the draw ratio in this case can be appropriately selected according to the resin as the raw material of the resin base material, but is preferably in the range of 2 to 10 times in each of the vertical axis direction and the horizontal axis direction.
  • anode Transparent anode
  • a metal such as Ag or Au or an alloy containing a metal as a main component, a CuI or indium-tin composite oxide (ITO), a metal such as SnO 2 or ZnO
  • ITO indium-tin composite oxide
  • SnO 2 or ZnO an oxide can be mentioned, it is preferably a metal or an alloy containing a metal as a main component, more preferably silver or an alloy containing silver as a main component.
  • the purity of the silver material used is preferably 99% or more. Further, palladium (Pd), copper (Cu), gold (Au), or the like may be added to ensure the stability of silver.
  • the transparent anode is a layer composed mainly of silver.
  • the transparent anode may be formed of silver alone or may be composed of an alloy containing silver (Ag).
  • alloys include silver-magnesium (Ag-Mg), silver-copper (Ag-Cu), silver-palladium (Ag-Pd), silver-palladium-copper (Ag-Pd-Cu), silver -Indium (Ag-In) and the like.
  • the anode constituting the organic EL device according to the present invention is a transparent anode composed mainly of silver and having a thickness in the range of 2 to 20 nm.
  • the thickness is preferably in the range of 4 to 12 nm.
  • a thickness of 20 nm or less is preferable because the absorption component and reflection component of the transparent anode can be kept low and high light transmittance can be maintained.
  • the layer composed mainly of silver means that the silver content in the transparent anode is 60% by mass or more, preferably the silver content is 80% by mass or more, More preferably, the silver content is 90% by mass or more, and particularly preferably the silver content is 98% by mass or more.
  • transparent in the transparent anode according to the present invention means that the light transmittance at a wavelength of 550 nm is 50% or more.
  • the transparent anode according to the present invention may have a configuration in which a layer composed mainly of silver is divided into a plurality of layers as necessary.
  • a base layer may be provided at the lower portion from the viewpoint of improving the uniformity of the silver film of the transparent anode to be formed.
  • a base layer it is a layer containing the organic compound which has a nitrogen atom or a sulfur atom, and the method of forming a transparent anode on the said base layer is a preferable aspect.
  • a method for forming a transparent anode that is a transparent conductive film for example, a method using a wet process such as a coating method, an inkjet method, a coating method, a dipping method, a vapor deposition method (resistance heating, EB method, etc.), a sputtering method, etc. And a method using a dry process such as a CVD method.
  • the transparent anode according to the present invention is preferably formed by a vapor deposition method.
  • a vacuum vapor deposition method is mainly used.
  • silver which is a constituent material of a transparent anode, and other if necessary Fill the alloy.
  • the resistance heating boat for vapor deposition is made of molybdenum or tungsten.
  • the vacuum degree in the vacuum deposition apparatus is reduced to, for example, a range of 1 ⁇ 10 ⁇ 2 to 1 ⁇ 10 ⁇ 6 Pa, and then the above-described deposition material containing a transparent anode forming material such as silver is used.
  • the resistance heating boat is energized and heated, and a silver thin film is vapor-deposited on the resin substrate or the underlayer at a predetermined vapor deposition rate (nm / second), and the thickness is in the range of 2 to 20 nm. An anode is formed.
  • the transparent anode can be sufficiently conductive by being formed on the underlayer without any high-temperature annealing treatment (for example, a heating process at 150 ° C. or higher) after the formation.
  • a base layer can be provided at a position adjacent to the resin substrate side of the transparent anode, preferably
  • an underlayer containing an organic compound having at least a nitrogen atom or a sulfur atom it is a preferable aspect to have an underlayer containing an organic compound having at least a nitrogen atom or a sulfur atom, and the organic compound contained in the underlayer has an effective unshared electron pair that is not involved in aromaticity.
  • a compound having a nitrogen atom is preferred.
  • a transparent anode mainly composed of silver when a transparent anode mainly composed of silver is formed, by providing a base layer containing an organic compound having a nitrogen atom or a sulfur atom underneath it, when forming the transparent anode, , The nitrogen atom or sulfur atom of the organic compound contained in the underlayer interacts, and as a result, the diffusion distance of silver atoms on the underlayer surface is reduced, thereby suppressing the formation of silver aggregates. And a transparent anode having high uniformity can be formed.
  • the organic compound having at least a nitrogen atom or a sulfur atom is not particularly limited.
  • a light emitting layer unit having a different color hue is laminated between the anode (first electrode) and the cathode (second electrode) in the configuration as shown in FIG.
  • an intermediate electrode M1, M2 having an independent connection terminal for obtaining an electrical connection between the light emitting layer units.
  • the charge injection layer according to the present invention is a layer provided between the electrode and the light-emitting layer in order to lower the driving voltage and improve the light emission luminance.
  • Reference Material 1 There is an electron injection layer.
  • the charge injection layer is present between the anode and the light emitting layer or the hole transport layer in the case of a hole injection layer, and between the cathode and the light emitting layer or the electron transport layer in the case of an electron injection layer.
  • the present invention is characterized in that the charge injection layer is disposed adjacent to the transparent electrode. When used in an intermediate electrode, it is sufficient that at least one of the adjacent electron injection layer and hole injection layer satisfies the requirements of the present invention.
  • the hole injection layer according to the present invention is a layer disposed adjacent to the anode, which is a transparent electrode, for lowering the driving voltage and improving the luminance of light emission, and the details thereof are described in Reference Document 1 above.
  • the details of the hole injection layer are described in JP-A-9-45479, JP-A-9-260062, JP-A-8-288069, etc.
  • materials used for the hole injection layer include: , Porphyrin derivatives, phthalocyanine derivatives, oxazole derivatives, oxadiazole derivatives, triazole derivatives, imidazole derivatives, pyrazoline derivatives, pyrazolone derivatives, phenylenediamine derivatives, hydrazone derivatives, stilbene derivatives, polyarylalkane derivatives, triarylamine derivatives, carbazole derivatives, Indolocarbazole derivatives, isoindole derivatives, acene derivatives such as anthracene and naphthalene, fluorene derivatives, fluorenone derivatives, polyvinylcarbazole, aromatic amines introduced into the main chain or side chain Child material or oligomer, polysilane, a conductive polymer or oligomer
  • Examples of the triarylamine derivative include benzidine type represented by ⁇ -NPD (4,4′-bis [N- (1-naphthyl) -N-phenylamino] biphenyl), and MTDATA (4,4 ′, 4 ′′).
  • Examples include a starburst type represented by -tris [N- (3-methylphenyl) -N-phenylamino] triphenylamine), a compound having fluorene or anthracene in the triarylamine-linked core.
  • hexaazatriphenylene derivatives such as those described in JP-T-2003-519432 and JP-A-2006-135145 can also be used as a hole transport material.
  • the electron injection layer is a layer provided between the cathode and the light emitting layer for lowering the driving voltage and improving the light emission luminance.
  • the cathode is composed of the transparent electrode according to the present invention, It is provided adjacent to the transparent electrode, and its details are described in the above reference material 1.
  • JP-A-6-325871, JP-A-9-17574, JP-A-10-74586, and the like Specific examples of materials preferably used for the electron injection layer are as follows. Metals represented by strontium and aluminum, alkali metal compounds represented by lithium fluoride, sodium fluoride, potassium fluoride, etc., alkali metal halide layers represented by magnesium fluoride, calcium fluoride, etc. Examples thereof include an alkaline earth metal compound layer typified by magnesium, a metal oxide typified by molybdenum oxide and aluminum oxide, and a metal complex typified by lithium 8-hydroxyquinolate (Liq).
  • Metals represented by strontium and aluminum alkali metal compounds represented by lithium fluoride, sodium fluoride, potassium fluoride, etc.
  • the transparent electrode in this invention is a cathode
  • organic materials such as a metal complex
  • the electron injection layer is preferably a very thin film, and depending on the constituent materials, the layer thickness is preferably in the range of 1 nm to 10 ⁇ m.
  • the light emitting layer constituting the light emitting layer unit of each color of the organic EL device according to the present invention preferably includes a phosphorescent light emitting compound as a light emitting material.
  • This light emitting layer is a layer that emits light by recombination of electrons injected from the electrode or the electron transport layer and holes injected from the hole transport layer, and the light emitting portion is in the layer of the light emitting layer. Alternatively, it may be the interface between the light emitting layer and the adjacent layer.
  • Such a light emitting layer is not particularly limited in its configuration as long as the light emitting material contained satisfies the light emission requirements. Moreover, there may be a plurality of layers having the same emission spectrum and emission maximum wavelength. In this case, it is preferable to have a non-light emitting intermediate layer between the light emitting layers.
  • the total thickness of the light emitting layers is preferably in the range of 1 to 100 nm, and more preferably in the range of 1 to 30 nm because a lower driving voltage can be obtained.
  • the sum total of the thickness of a light emitting layer is the thickness also including the said intermediate
  • the thickness of each light emitting layer is within the range of 1 to 50 nm. It is preferable to adjust to within a range of 1 to 20 nm.
  • the plurality of stacked light emitting layers correspond to the respective emission colors of blue, green, and red, there is no particular limitation on the relationship between the thicknesses of the blue, green, and red light emitting layers.
  • the light emitting layer as described above is prepared by using a known method such as a vacuum evaporation method, a spin coating method, a casting method, an LB method (Langmuir-Blodget, Langmuir Blodgett method) and an ink jet method. Can be formed.
  • a known method such as a vacuum evaporation method, a spin coating method, a casting method, an LB method (Langmuir-Blodget, Langmuir Blodgett method) and an ink jet method. Can be formed.
  • a plurality of light emitting materials may be mixed, and a phosphorescent light emitting material and a fluorescent light emitting material (also referred to as a fluorescent dopant or a fluorescent compound) may be mixed and used in the same light emitting layer.
  • the structure of the light-emitting layer preferably includes a host compound (also referred to as a light-emitting host) and a light-emitting material (also referred to as a light-emitting dopant compound), and emits light from the light-emitting material.
  • ⁇ Host compound> As the host compound contained in the light emitting layer, a compound having a phosphorescence quantum yield of phosphorescence emission at room temperature (25 ° C.) of less than 0.1 is preferable. Further, the phosphorescence quantum yield is preferably less than 0.01. Moreover, it is preferable that the volume ratio in the layer is 50% or more among the compounds contained in a light emitting layer.
  • a known host compound may be used alone, or a plurality of types of host compounds may be used.
  • a plurality of types of host compounds it is possible to adjust the movement of charges, and the efficiency of the organic electroluminescent device can be improved.
  • a plurality of kinds of light emitting materials described later it is possible to mix different light emission, thereby obtaining an arbitrary light emission color.
  • the host compound used in the light emitting layer may be a conventionally known low molecular compound or a high molecular compound having a repeating unit, and a low molecular compound having a polymerizable group such as a vinyl group or an epoxy group (evaporation polymerizable light emitting host). )
  • host compounds applicable to the present invention include, for example, JP-A Nos. 2001-257076, 2002-308855, 2001-313179, 2002-319491, 2001-357777, 2002-334786, 2002-8860, 2002-334787, 2002-15871, 2002-334788, 2002-43056, 2002-334789, 2002 -75645, 2002-338579, 2002-105445, 2002-343568, 2002-141173, 2002-352957, 2002-203683, 2002 36 No. 227, No. 2002-231453, No. 2003-3165, No. 2002-234888, No. 2003-27048, No. 2002-255934, No. 2002-260861, No. 2002-280183. No. 2002, No. 2002-299060, No.
  • a phosphorescent compound also referred to as a phosphorescent compound, a phosphorescent material, or a phosphorescent dopant
  • a fluorescent compound both a fluorescent compound or a fluorescent material
  • a phosphorescent compound is a compound in which light emission from an excited triplet is observed. Specifically, it is a compound that emits phosphorescence at room temperature (25 ° C.), and the phosphorescence quantum yield is 0 at 25 ° C.
  • a preferred phosphorescence quantum yield is 0.1 or more, although it is defined as 0.01 or more compounds.
  • the phosphorescent quantum yield can be measured by the method described in Spectroscopic II, page 398 (1992 edition, Maruzen) of the Fourth Edition Experimental Chemistry Course 7.
  • the phosphorescence quantum yield in the solution can be measured using various solvents, but when using a phosphorescent compound in the present invention, the phosphorescence quantum yield is 0.01 or more in any solvent. Should be achieved.
  • the phosphorescent compound can be appropriately selected from known compounds used for the light-emitting layer of a general organic EL device, but preferably contains a group 8 to 10 metal in the periodic table of elements. More preferred are iridium compounds, more preferred are iridium compounds, osmium compounds, platinum compounds (platinum complex compounds) or rare earth complexes, and most preferred are iridium compounds.
  • At least one light emitting layer may contain two or more phosphorescent compounds, and the concentration ratio of the phosphorescent compound in the light emitting layer varies in the thickness direction of the light emitting layer. It may be an embodiment.
  • preferred phosphorescent compounds include organometallic complexes having Ir as a central metal. More preferably, a complex containing at least one coordination mode of a metal-carbon bond, a metal-nitrogen bond, a metal-oxygen bond, and a metal-sulfur bond is preferable.
  • the phosphorescent compound described above (also referred to as a phosphorescent metal complex) is described in, for example, Organic Letter, vol. 16, 2579-2581 (2001), Inorganic Chemistry, Vol. 30, No. 8, pp. 1685-1687 (1991), J. Am. Am. Chem. Soc. , 123, 4304 (2001), Inorganic Chemistry, Vol. 40, No. 7, pages 1704-1711 (2001), Inorganic Chemistry, Vol. 41, No. 12, pages 3055-3066 (2002) , New Journal of Chemistry. 26, 1171 (2002), European Journal of Organic Chemistry, Vol. 4, pages 695-709 (2004), and methods disclosed in the references and the like described in these documents Can be synthesized.
  • Fluorescent compounds include coumarin dyes, pyran dyes, cyanine dyes, croconium dyes, squalium dyes, oxobenzanthracene dyes, fluorescein dyes, rhodamine dyes, pyrylium dyes, perylene dyes, stilbene dyes. And dyes, polythiophene dyes, and rare earth complex phosphors.
  • the hole transport layer is made of a hole transport material having a function of transporting holes.
  • the hole injection layer and the electron blocking layer also have the function of a hole transport layer.
  • the hole transport layer can be provided as a single layer or a plurality of layers.
  • the hole transport material has any of hole injection or transport and electron barrier properties, and may be either organic or inorganic.
  • triazole derivatives oxadiazole derivatives, imidazole derivatives, polyarylalkane derivatives, pyrazoline derivatives, pyrazolone derivatives, phenylenediamine derivatives, arylamine derivatives, amino-substituted chalcone derivatives, oxazole derivatives, styrylanthracene derivatives, fluorenone derivatives, hydrazone derivatives
  • Examples include stilbene derivatives, silazane derivatives, aniline copolymers, conductive polymer oligomers, and thiophene oligomers.
  • hole transport material those described above can be used, but porphyrin compounds, aromatic tertiary amine compounds and styrylamine compounds can be used, and in particular, aromatic tertiary amine compounds can be used. preferable.
  • aromatic tertiary amine compounds and styrylamine compounds include N, N, N ′, N′-tetraphenyl-4,4′-diaminophenyl, N, N′-diphenyl-N, N′— Bis (3-methylphenyl)-[1,1′-biphenyl] -4,4′-diamine (abbreviation: TPD), 2,2-bis (4-di-p-tolylaminophenyl) propane, 1,1 -Bis (4-di-p-tolylaminophenyl) cyclohexane, N, N, N ', N'-tetra-p-tolyl-4,4'-diaminobiphenyl, 1,1-bis (4-di-p -Tolylaminophenyl) -4-phenylcyclohexane, bis (4-dimethylamino-2-methylphenyl) phenylmethane, bis (4-di-p
  • the hole transport material may be formed by a known method such as a vacuum deposition method, a spin coating method, a casting method, a printing method including an ink jet method, and an LB method (Langmuir Brodget, Langmuir Brodgett method). Thus, it can be formed by thinning.
  • the layer thickness of the hole transport layer is not particularly limited, but is usually about 5 nm to 5 ⁇ m, preferably 5 to 200 nm.
  • the hole transport layer may have a single layer structure composed of one or more of the above materials.
  • the p property can be increased by doping impurities into the material of the hole transport layer.
  • Examples thereof include JP-A-4-297076, JP-A-2000-196140, 2001-102175 and J.P. Appl. Phys. 95, 5773 (2004), and the like.
  • the electron transport layer is made of a material having a function of transporting electrons, and in a broad sense, an electron injection layer and a hole blocking layer are also included in the electron transport layer.
  • the electron transport layer can be provided as a single layer structure or a stacked structure of a plurality of layers.
  • an electron transport material (also serving as a hole blocking material) constituting a layer portion adjacent to the light emitting layer is used as an electron transporting material. What is necessary is just to have the function to transmit.
  • any one of conventionally known compounds can be selected and used. Examples include nitro-substituted fluorene derivatives, diphenylquinone derivatives, thiopyran dioxide derivatives, carbodiimides, fluorenylidenemethane derivatives, anthraquinodimethane, anthrone derivatives, and oxadiazole derivatives.
  • a thiadiazole derivative in which the oxygen atom of the oxadiazole ring is substituted with a sulfur atom, and a quinoxaline derivative having a quinoxaline ring known as an electron-withdrawing group can also be used as a material for the electron transport layer. It can. Furthermore, a polymer material in which these materials are introduced into a polymer chain, or a polymer material having these materials as a polymer main chain can also be used.
  • metal complexes of 8-quinolinol derivatives such as tris (8-quinolinol) aluminum (abbreviation: Alq 3 ), tris (5,7-dichloro-8-quinolinol) aluminum, tris (5,7-dibromo-8- Quinolinol) aluminum, tris (2-methyl-8-quinolinol) aluminum, tris (5-methyl-8-quinolinol) aluminum, bis (8-quinolinol) zinc (abbreviation: Znq), etc. and the central metal of these metal complexes
  • a metal complex replaced with In, Mg, Cu, Ca, Sn, Ga, or Pb can also be used as a material for the electron transport layer.
  • the electron transport layer can be formed by thinning the above material by a known method such as a vacuum deposition method, a spin coating method, a casting method, a printing method including an inkjet method, and an LB method.
  • the thickness of the electron transport layer is not particularly limited, but is usually about 5 nm to 5 ⁇ m, preferably 5 to 200 nm.
  • the electron transport layer may have a single structure composed of one or more of the above materials.
  • the blocking layer includes a hole blocking layer and an electron blocking layer, and is a layer provided as necessary in addition to the constituent layers of the organic functional layer unit 3 described above. For example, it is described in JP-A Nos. 11-204258 and 11-204359, and “Organic EL elements and the forefront of industrialization (published by NTT Corporation on November 30, 1998)” on page 237. Hole blocking (hole block) layer and the like.
  • the hole blocking layer has a function of an electron transport layer in a broad sense.
  • the hole blocking layer is made of a hole blocking material that has a function of transporting electrons but has a very small ability to transport holes, and recombines electrons and holes by blocking holes while transporting electrons. Probability can be improved.
  • the structure of an electron carrying layer can be used as a hole-blocking layer as needed.
  • the hole blocking layer is preferably provided adjacent to the light emitting layer.
  • the electron blocking layer has a function of a hole transport layer in a broad sense.
  • the electron blocking layer is made of a material that has the ability to transport holes and has a very small ability to transport electrons. By blocking holes while transporting holes, the probability of recombination of electrons and holes is improved. Can be made.
  • the structure of a positive hole transport layer can be used as an electron blocking layer as needed.
  • the layer thickness of the hole blocking layer applied to the present invention is preferably in the range of 3 to 100 nm, more preferably in the range of 5 to 30 nm.
  • the cathode (second electrode) is an electrode film that functions to supply holes to the light emitting layer unit, and a metal, an alloy, an organic or inorganic conductive compound, or a mixture thereof is used. Specifically, gold, aluminum, silver, magnesium, lithium, magnesium / copper mixture, magnesium / silver mixture, magnesium / aluminum mixture, magnesium / indium mixture, indium, lithium / aluminum mixture, rare earth metal, ITO, ZnO, TiO Oxide semiconductors such as 2 and SnO 2 .
  • the second electrode can be produced by forming a thin film of these conductive materials by a method such as vapor deposition or sputtering.
  • the sheet resistance as the second electrode is preferably several hundred ⁇ / ⁇ or less, and the film thickness is usually selected in the range of 5 nm to 5 ⁇ m, preferably 5 to 200 nm.
  • the organic EL element is a double-sided light emitting type in which the emitted light L is also taken out from the second electrode side as exemplified in FIG. 6B
  • a second electrode having high light transmittance, such as the first What is necessary is just to select and comprise the constituent material etc. of an electrode.
  • sealing member examples of the sealing means used for sealing the organic EL element according to the present invention include a method of bonding the sealing member, the second electrode 6 and the transparent substrate F with an adhesive. .
  • the sealing member may be disposed so as to cover the display area of the organic EL element, and may be concave or flat. Further, transparency and electrical insulation are not particularly limited.
  • a glass plate, a polymer plate, a film, a metal plate, a film, etc. examples include soda-lime glass, barium / strontium-containing glass, lead glass, aluminosilicate glass, borosilicate glass, barium borosilicate glass, and quartz.
  • the polymer plate examples include polycarbonate, acrylic, polyethylene terephthalate, polyether sulfide, and polysulfone.
  • the metal plate include one or more metals or alloys selected from the group consisting of stainless steel, iron, copper, aluminum, magnesium, nickel, zinc, chromium, titanium, molybdenum, silicon, germanium, and tantalum.
  • the sealing member a polymer film and a metal film can be preferably used from the viewpoint of reducing the thickness of the organic EL element. Furthermore, the polymer film has a water vapor transmission rate of 1 ⁇ 10 ⁇ 3 g / m 2 .multidot.m at a temperature of 25 ⁇ 0.5 ° C. and a relative humidity of 90 ⁇ 2% RH measured by a method according to JIS K 7129-1992.
  • the oxygen permeability measured by a method according to JIS K 7126-1987 is preferably 1 ⁇ 10 ⁇ 3 ml / m 2 ⁇ 24 h ⁇ atm (1 atm is 1.01325 ⁇ 10 5 a Pa) equal to or lower than a temperature of 25 ⁇ 0.5 ° C.
  • water vapor permeability at a relative humidity of 90 ⁇ 2% RH is preferably not more than 1 ⁇ 10 -3 g / m 2 ⁇ 24h.
  • the second electrode and the light emitting layer unit are coated on the outer side of the second electrode on the side facing the transparent substrate with the light emitting layer unit interposed therebetween, and an inorganic or organic layer is formed in contact with the transparent substrate.
  • a sealing film can also be suitably used.
  • the material for forming the sealing film may be any material that has a function of suppressing intrusion of moisture, oxygen, or the like that degrades the organic EL element.
  • silicon oxide, silicon dioxide, silicon nitride, or the like is used. be able to.
  • the method for forming these films is not particularly limited.
  • vacuum deposition method sputtering method, reactive sputtering method, molecular beam epitaxy method, cluster ion beam method, ion plating method, plasma polymerization method, atmospheric pressure plasma
  • a polymerization method a plasma CVD method, a laser CVD method, a thermal CVD method, a coating method, or the like can be used.
  • the gap between the sealing member and the display area of the organic EL element it is preferable to inject an inert gas such as nitrogen or argon, or an inert liquid such as fluorinated hydrocarbon or silicon oil in the gas phase and the liquid phase.
  • an inert gas such as nitrogen or argon
  • an inert liquid such as fluorinated hydrocarbon or silicon oil
  • the gap between the sealing member and the display area of the organic EL element can be evacuated, or a hygroscopic compound can be sealed in the gap.
  • the organic electroluminescence lighting device emits light from a flexible surface light emitting device including an organic electroluminescence element capable of natural and supple movement and capable of toned light emission.
  • Light information, temperature information, etc.), and the light emission conditions are controlled in conjunction with the input information, and an illumination device having lighting effects and decoration as an elegant object is provided. be able to.

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  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

Le problème décrit par la présente invention est de concevoir un dispositif d'éclairage EL organique qui, en amenant un élément EL organique à émettre une lumière ayant des tons de couleur associés à des informations d'entrée (des informations de son, des informations de lumière, des informations de température, etc.), se voit attribuer des propriétés d'éclairage décoratif et spectaculaire et qui fonctionne comme un objet élégant. La solution selon l'invention porte sur un dispositif d'éclairage EL organique pourvu d'un corps flexible à surface électroluminescente doté d'un élément EL organique pouvant émettre une lumière ayant des tons de couleur, et caractérisé en ce qu'il est en outre équipé : d'une unité d'entrée d'informations permettant d'entrer des informations d'entrée ; d'une unité de mémoire de données spectaculaires destinée à mémoriser des données spectaculaires de commande et de rendu spectaculaire de l'émission de lumière ayant des tons de couleur, et à sélectionner des données spectaculaires sur la base des informations d'entrée et à les sortir en tant que signal électrique ; d'une unité de circuit de commande de signal destinée à sélectionner et à commander l'élément EL organique pour entrer le signal électrique des données spectaculaires sorties par l'unité de mémoire de données spectaculaires ; et d'une unité de circuit de commande d'élément EL organique destinée à commander au moins la teinte et la luminosité de la lumière émise par l'élément EL organique sur la base du signal électrique issu du circuit de commande d'entrée de signal.
PCT/JP2015/051215 2014-02-10 2015-01-19 Dispositif d'éclairage électroluminescent organique et procédé d'éclairage WO2015118932A1 (fr)

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