WO2009107226A1 - Illuminateur el organique cylindrique - Google Patents

Illuminateur el organique cylindrique Download PDF

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Publication number
WO2009107226A1
WO2009107226A1 PCT/JP2008/053607 JP2008053607W WO2009107226A1 WO 2009107226 A1 WO2009107226 A1 WO 2009107226A1 JP 2008053607 W JP2008053607 W JP 2008053607W WO 2009107226 A1 WO2009107226 A1 WO 2009107226A1
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WIPO (PCT)
Prior art keywords
organic
cylindrical
cylindrical tube
light
tube
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Application number
PCT/JP2008/053607
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English (en)
Japanese (ja)
Inventor
暁 山本
Original Assignee
有限会社マイクロシステム
フジテック・インターナショナル株式会社
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Application filed by 有限会社マイクロシステム, フジテック・インターナショナル株式会社 filed Critical 有限会社マイクロシステム
Priority to PCT/JP2008/053607 priority Critical patent/WO2009107226A1/fr
Publication of WO2009107226A1 publication Critical patent/WO2009107226A1/fr

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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
    • H05B33/00—Electroluminescent light sources
    • H05B33/10—Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2105/00—Planar light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • F21Y2115/15—Organic light-emitting diodes [OLED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/20—Electroluminescent [EL] light sources

Definitions

  • the present invention relates to an illuminator using an organic EL light emitting element, and more particularly to a cylindrical organic EL illuminator.
  • an organic EL light emitting element is formed on a flat glass plate and sealed with metal or glass. The light generated in the organic EL light emitting element was emitted to the outside through the organic material layer, the transparent anode, and the flat glass plate.
  • a white illuminator has been manufactured by forming an organic EL light emitting element in which low-molecular light emitting materials of three components of red, green, and blue are dispersed.
  • the organic EL light-emitting element was formed by vacuum deposition in which each raw material was placed in a crucible and heated in a vacuum, and the evaporated raw material molecules or atoms were sequentially attached to the surface of the flat glass plate.
  • the sealing component for preventing moisture in the air from entering the organic EL light emitting element is adhered to the flat glass plate with an adhesive that is cured by ultraviolet rays.
  • a single organic EL light emitting element formed on a flat glass plate emits light by direct current. For this reason, although the brightness can be adjusted by the strength of the current, the emission wavelength is determined by the material of the light emitting layer and cannot be arbitrarily adjusted.
  • an organic EL light-emitting device When an organic EL light-emitting device is driven continuously by applying an electric current, the organic material layer is aggregated and crystallized, the organic material undergoes an electrochemical reaction, the interaction between molecular excitons and interfacial charges, and the diffusion and chemical properties at the organic material layer interface.
  • the average luminance of the organic EL light-emitting element is reduced by reaction, local short circuit due to unevenness and dust.
  • the deterioration of luminance depends on the current, and when driving at high luminance, the current increases, so there is a problem that the deterioration is accelerated.
  • the organic EL light emitting element generates heat when the current is increased to increase the luminance. For this reason, when the organic EL light emitting element is driven with high luminance, the organic material is deteriorated and further deteriorated.
  • the luminance half life of the organic EL light emitting element varies depending on each light emitting material. For this reason, in the case of white light emission using a plurality of light emitting materials, there has been a problem that the light emission chromaticity is shifted as the light emission time elapses.
  • the raw material in the heated crucible scatters radially.
  • the flat glass plate is installed on the upper surface of the crucible, but the raw material scattered from the crucible to the side surface adheres to the vacuum vessel without reaching the flat glass plate. For this reason, there was a problem that the raw material efficiency was as low as about 20%.
  • the use of an adhesive for sealing makes it difficult to disassemble the parts.
  • the illuminator that cannot be used due to a decrease in luminance of the organic EL light emitting element has a problem of being discarded without being reused.
  • An object of the present invention is to provide a cylindrical organic EL illuminator capable of improving luminance while suppressing deterioration of an organic EL light emitting element.
  • the cylindrical organic EL illuminator of the present invention is an illuminator that emits light from an organic EL, and includes a tube (tube shape), an organic EL light emitting element, a desiccant, and a pair of sealing components.
  • the tubular tube is transparent.
  • the organic EL light-emitting element includes a transparent anode formed in order inside a cylindrical tube, an organic material layer including a light-emitting layer, and a cathode.
  • the desiccant is contained inside the cylindrical tube.
  • the pair of sealing parts seals both ends of the cylindrical tube in order to fill the inside of the cylindrical tube with nitrogen or an inert gas atmosphere.
  • the transparent anode is connected to the plus and the cathode is connected to the minus, and current is supplied to the organic EL light emitting element to emit light.
  • the inner surface of the sealing component is preferably a reflecting mirror.
  • fine irregularities are provided on the surface of the cylindrical tube.
  • the inner surface of the sealing part on one end side of the cylindrical tube is preferably a reflecting mirror, and the other end side of the cylindrical pipe is sealed.
  • the part is transparent.
  • the sealing component is preferably sealed using an O-ring.
  • the cylindrical organic EL illuminator is formed inside another cylindrical tube inserted into the cylindrical tube and having a diameter smaller than that of the cylindrical tube. Further, another organic EL light emitting element formed into a film is further provided. A cylindrical tube and another cylindrical tube constitute a multiple tube.
  • the organic EL light emitting element and the other organic light emitting elements in the multi-tubular tube each emit light at the same wavelength.
  • the organic EL light emitting element and the other organic light emitting elements in the multiple tube emit light at different wavelengths.
  • any one of a current and a voltage applied to each of the organic EL light emitting element and the other organic light emitting elements in the multiple tube can be adjusted independently.
  • the cylindrical tube is glass
  • the organic material layer is one or more selected from the group consisting of a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer.
  • a dopant molecule and the organic material layer is a low molecular weight organic material.
  • the cylindrical tube is glass
  • the organic material layer is one or more selected from the group consisting of a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer.
  • a dopant molecule, and the light emitting layer is a high molecular weight organic material.
  • the organic EL light emitting element conventionally formed on a flat glass plate is formed on the inside of the cylindrical tube.
  • a sealing component that is generated inside the organic EL light-emitting element propagates through the cylindrical tube and the organic material layer without being radiated to the outside, and returns the light emitted from the end face to the inside of the cylindrical tube.
  • the inner surface of is a reflecting mirror.
  • the light extraction is preferably performed by fine irregularities on the surface of the cylindrical tube.
  • a plurality of small-diameter multiple tube tubes with organic EL light-emitting elements formed therein are installed inside the cylindrical tube, whereby the current of each organic EL light-emitting element is adjusted, and the emission color The degree is optimized.
  • the organic EL light-emitting element is preferably formed by supplying a raw material inside a rotating cylindrical tube. It is preferable to use a rubber O-ring for sealing the cylindrical tube, so that it can be easily disassembled and assembled after disassembly.
  • the organic EL light emitting element is formed in a cylindrical tube. Since this cylindrical tube has higher mechanical strength than a conventional flat glass and can be thinned, high luminance can be achieved. In addition, since the cylindrical tube can be made thinner than the conventional flat glass, more heat generated from the organic EL light-emitting element can be transmitted to the outside, and the temperature of the organic EL light-emitting element can be lowered. It is difficult for the EL light emitting element to deteriorate.
  • the cylindrical tube since it is a cylindrical tube, when the crucible is put inside the cylindrical tube, the cylindrical tube covers the periphery of the crucible. For this reason, even if the raw material scatters radially from the crucible during vacuum deposition, the cylindrical tube covers the periphery of the crucible, so the raw material is deposited on the cylindrical tube more efficiently than in the case of conventional flat glass. can do.
  • a desiccant is placed in the tubular tube, and both ends of the tubular tube are sealed to fill with nitrogen or an inert gas atmosphere. Since the desiccant is put in this way and both ends of the cylindrical tube are sealed by filling with nitrogen or inert gas atmosphere, water molecules in the air are prevented from entering the inside of the tube on the cylinder And deterioration of the organic EL light emitting element can be prevented.
  • the light generated in the light emitting layer includes light radiated to the outside of the tubular tube, light that passes through the transparent cathode and travels toward the inside of the tubular tube, light that travels to the sealing portions at both ends, The light is refracted on the surface of the tubular tube and is divided into light that travels through the interface between the organic layer and the tubular tube by multiple reflection.
  • the light directed toward the inside of the cylindrical tube reaches the opposite cylindrical tube, and a part thereof is emitted to the outside.
  • the light directed toward the sealing component is reflected by 90% or more by the reflecting mirror on the inner surface of the sealing component, and returns to the inside of the cylindrical tube.
  • the light that has returned to the inside of the cylindrical tube reaches the surface of any of the cylindrical tubes that form a fine uneven shape.
  • light is radiated to the outside where the incident angle of light is different from the total reflection angle. Therefore, light other than the light absorbed and lost in the material is finally emitted to the outside of the cylindrical tube. For this reason, the light generated in the light emitting layer can be extracted to the outside more efficiently, and an illuminator with high external quantum efficiency can be realized.
  • the inner surface of the sealing part on the one end side of the cylindrical tube is made into a reflecting mirror, and the sealing part on the other end side of the cylindrical pipe is made transparent, thereby sealing the other end side of the cylindrical pipe. High brightness light can be extracted from the component.
  • the organic EL light emitting element on the multiple tube, the current flowing through each organic EL light emitting element is reduced, so that the deterioration of luminance is suppressed and a long-life illuminator can be realized.
  • an organic EL light emitting element is formed on the multiple tube, current can flow in parallel, so that a low voltage and high luminance illuminator can be realized.
  • red, green, and blue organic EL light emitting elements are formed on the multiple tube tubes, respectively, and white color is obtained by flowing current individually, and the average luminance can be adjusted by the strength of the current.
  • a color illuminator that emits light in an arbitrary color among triangles on the chromaticity coordinates of red, green, and blue by adjusting individual currents.
  • the organic EL light-emitting element can be formed with high raw material efficiency by feeding the raw material into the carrier tube inside the rotating cylindrical tube.
  • 1 is an external view of a monochromatic cylindrical organic EL illuminator according to Embodiment 1 of the present invention.
  • 1 is an external view of a multicolor cylindrical organic EL illuminator according to Embodiment 1 of the present invention.
  • It is an external view of the spot type organic EL illuminator in Embodiment 1 of the present invention.
  • It is sectional drawing of the monochromatic cylindrical organic electroluminescent illuminator which shows the Example of this invention.
  • It is sectional drawing of the monochromatic cylindrical organic electroluminescent illuminator which uses fluorescent substance.
  • It is sectional drawing of a multicolor cylindrical organic electroluminescent illuminator.
  • It is sectional drawing of a spot type organic electroluminescent illuminator.
  • It is a partial expanded sectional view which shows roughly the structure of the cylindrical tube of the cylindrical organic electroluminescent illuminator in Embodiment 6 of this invention.
  • Electron transporting yellow light emitting layer 10 Electron transport layer, 11 Alkali metal layer, 12, 20c, 22c, 24c, 30c Cathode, 13 Electric wire, 14 DC power supply, 15 Mirror surface, 16 Desiccant, 17 Nitrogen gas, 18 dopant Molecule, 19 polymer light emitting layer, 20, 33 outer cylindrical tube, 20A red organic EL light emitting device, 20b red organic EL light emitting layer, 22, 34 intermediate cylindrical tube, 22A blue organic EL light emitting device, 22b blue organic EL light emitting layer, 24, 35 inner cylindrical tube, 24A green organic EL light emitting element, 24b green organic EL light emitting layer, 25 anode sealing component, 26 cathode Stop part, 27 Blue light emission regulator, 28 Red light emission regulator, 29 Green light emission regulator, 30 White
  • FIG. 1A is an external view of a monochromatic cylindrical organic EL illuminator according to Embodiment 1 of the present invention
  • FIG. 1B is an external view of a multicolor cylindrical organic EL illuminator according to Embodiment 1 of the present invention
  • 1C is an external view of the spot-type organic EL illuminator according to Embodiment 1 of the present invention.
  • a sealing component 2 is attached to each of both ends of the cylindrical tube 1, and an electrode 4 is attached to each of the sealing components 2 on both sides. .
  • the cylindrical tube has, for example, a multi-cylindrical tube configuration, and an anode is sealed at one end of the outer cylindrical tube 20 of the multi-cylindrical tubes.
  • a component 25 is attached to a cathode sealing component 26 at the other end.
  • three electrodes 4 are attached to each of the anode sealing component 25 and the cathode sealing component 26.
  • the cylindrical tube has, for example, a multi-cylindrical tube configuration, and an inner surface of the multi-cylindrical tube has a reflecting mirror at one end portion of the outer cylindrical tube 33.
  • a reflective sealing component 31 is attached to a transparent transparent sealing component 32 at the other end.
  • two electrodes 4 are attached to the reflective sealing component 31.
  • FIG. 2 is a cross-sectional view schematically showing a configuration of a monochromatic cylindrical organic EL illuminator using blue and yellow light emission in the second embodiment of the present invention.
  • the cylindrical tube 1 is made of transparent glass, and is made of, for example, a straight tube.
  • a sealing component 2 is attached to each of both ends of the cylindrical tube 1.
  • An O-ring 3 is disposed between the sealing component 2 and the cylindrical tube 1. The inside of the cylindrical tube 1 is hermetically sealed by the sealing component 2 and the O-ring 3.
  • the electrode 4 for supplying electricity is attached to each of the sealing parts 2 on both sides.
  • a protective film 5 Inside the cylindrical tube 1, there are a protective film 5, a transparent anode 6, a hole transport layer 7, an electron transport blue light emitting layer 8, an electron transport yellow light emitting layer 9, and an electron transport layer 10.
  • the alkali metal layer 11 and the cathode 12 are sequentially formed.
  • the protective film 5 is made of, for example, SiO 2 having a thickness of 10 nm.
  • the transparent anode 6 is made of, for example, ITO (Indium Tin Oxide) having a thickness of 1 ⁇ m.
  • the hole transport layer 7 is formed of an organic material (NPD) represented by the following chemical formula (1) with a thickness of 40 nm, for example.
  • the electron-transporting blue light-emitting layer 8 is mainly composed of, for example, an organic material (Znbox 2) represented by the following chemical formula (2) and is 1.5 weight by perylene (C 20 H 12 ) represented by the following chemical formula (3), for example. It is a 7 nm thick layer with a% doping.
  • the electron-transporting yellow light-emitting layer 9 is mainly doped with, for example, the organic material (Znbox 2) represented by the above chemical formula (2) and doped by 0.25% by weight with the organic material (DCM 1) represented by the following chemical formula (4). This is a layer having a thickness of 23 nm.
  • the electron transport layer 10 is a layer having a thickness of 30 nm formed from, for example, an organic material (Znbox 2) represented by the above chemical formula (2).
  • the alkali metal layer 11 is made of, for example, LiF having a thickness of 5 nm.
  • the cathode 12 is made of Al having a thickness of 0.5 ⁇ m, for example.
  • Each of the transparent anode 6 and the cathode 12 is connected to the electrode 4 by an electric wire 13, whereby the organic EL light emitting element is supplied with a current from a DC power source 14.
  • the transparent anode 6 is electrically connected to the + (plus) side of the DC power supply 14, and the cathode 12 is electrically connected to the ⁇ (minus) side of the DC power supply 14.
  • the inner surface of the sealing component 2 is a mirror surface 15.
  • a desiccant 16 is attached to the tip of the electrode 4, whereby the desiccant 16 is disposed inside the cylindrical tube 1.
  • a nitrogen gas 17 is sealed inside the cylindrical tube 1.
  • the inside of the cylindrical tube 1 may be filled with nitrogen gas 17 or an inert gas atmosphere.
  • FIG. 3 is a cross-sectional view schematically showing a configuration of a monochromatic cylindrical organic EL illuminator that emits green light in Embodiment 3 of the present invention.
  • the cylindrical tube 1 is made of transparent glass, and is made of, for example, a straight tube.
  • a sealing component 2 is attached to each of both ends of the cylindrical tube 1.
  • An O-ring 3 is disposed between the sealing component 2 and the cylindrical tube 1. The inside of the cylindrical tube 1 is hermetically sealed by the sealing component 2 and the O-ring 3.
  • the electrode 4 for supplying electricity is attached to each of the sealing parts 2 on both sides.
  • a protective film 5 Inside the cylindrical tube 1, a protective film 5, a transparent anode 6, a hole transport layer 7, a polymer light emitting layer 19, an alkali metal layer 11, and a cathode 12 are sequentially formed.
  • the protective film 5 is made of, for example, SiO 2 having a thickness of 10 nm.
  • the transparent anode 6 is made of, for example, ITO having a thickness of 1 ⁇ m.
  • the hole transport layer 7 is made of, for example, an organic material (NPD) having a thickness of 40 nm.
  • the polymer light emitting layer 19 is formed of, for example, polyfluorene having a thickness of 80 nm to which 5% of a low-molecular iridium complex (Ir (ppy) 3 ) is added as a dopant molecule 18.
  • Polyfluorene has the following chemical formula (5), and the iridium complex (Ir (ppy) 3 ) has the following chemical formula (6).
  • the alkali metal layer 11 is made of, for example, LiF having a thickness of 5 nm.
  • the cathode 12 is made of Al having a thickness of 0.5 ⁇ m, for example.
  • Each of the transparent anode 6 and the cathode 12 is connected to the electrode 4 by an electric wire 13, whereby the organic EL light emitting element is supplied with a current from a DC power source 14.
  • the transparent anode 6 is electrically connected to the + (plus) side of the DC power supply 14, and the cathode 12 is electrically connected to the ⁇ (minus) side of the DC power supply 14.
  • the inner surface of the sealing component 2 is a mirror surface 15.
  • a desiccant 16 is attached to the tip of the electrode 4, whereby the desiccant 16 is disposed inside the cylindrical tube 1.
  • a nitrogen gas 17 is sealed inside the cylindrical tube 1.
  • the inside of the cylindrical tube 1 may be filled with nitrogen gas 17 or an inert gas atmosphere.
  • FIG. 4 is a cross-sectional view schematically showing a configuration of a multicolor cylindrical organic EL illuminator using three organic EL light emitting elements in Embodiment 4 of the present invention.
  • the organic EL illuminator of the present embodiment has a multi-cylindrical tube configuration.
  • This multiple cylindrical tube has a configuration in which, for example, three cylindrical tubes having different diameters of an outer cylindrical tube 20, an intermediate cylindrical tube 22, and an inner cylindrical tube 24 are arranged coaxially.
  • Each of the cylindrical tubes 20, 22, and 24 is made of transparent glass, and is made of, for example, a straight tube.
  • An anode sealing component 25 is attached to one end of the outer cylindrical tube 20, and a cathode sealing component 26 is attached to the other end.
  • An O-ring 3 is disposed between the anode sealing component 25 and the outer cylindrical tube 20 and between the cathode sealing component 26 and the outer cylindrical tube 20.
  • the inside of the outer cylindrical tube 20 is hermetically sealed by the anode sealing component 25, the cathode sealing component 26 and the O-ring 3.
  • a red organic EL light emitting element 20 ⁇ / b> A is formed inside the outer cylindrical tube 20.
  • the red organic EL light emitting element 20A includes a transparent anode 20a, a red organic EL light emitting layer 20b, and a cathode 20c, which are sequentially formed from the inside of the outer cylindrical tube 20.
  • a blue organic EL light emitting element 22 ⁇ / b> A is formed inside the intermediate cylindrical tube 22.
  • the blue organic EL light emitting element 22A includes a transparent anode 22a, a blue organic EL light emitting layer 22b, and a cathode 22c, which are sequentially formed from the inside of the intermediate cylindrical tube 22.
  • a green organic EL light emitting element 24A is formed inside the inner cylindrical tube 24.
  • the green organic EL light emitting element 24A includes a transparent anode 24a, a green organic EL light emitting layer 24b, and a cathode 24c, which are sequentially formed from the inside of the inner cylindrical tube 24.
  • Each of the transparent anode 20a and the cathode 20c is connected to the electrode 4 by an electric wire 13, whereby the red organic EL light emitting element 20A is electrically connected to the DC power source 14 and the red light emission controller 28.
  • Each of the transparent anode 22a and the cathode 22c is connected to the electrode 4 by the electric wire 13, whereby the blue organic EL light emitting element 22A is electrically connected to the DC power source 14 and the blue light emission regulator 27.
  • Each of the transparent anode 24a and the cathode 24c is connected to the electrode 4 by the electric wire 13, whereby the green organic EL light emitting element 24A is electrically connected to the DC power source 14 and the green light emission regulator 29.
  • Each transparent anode 20a, 22a, 24a is electrically connected to the + (plus) side of the DC power supply 14, and each cathode 20c, 22c, 24c is electrically connected to the-(minus) side of the DC power supply 14. It is connected.
  • the inner surfaces of the anode sealing component 25 and the cathode sealing component 26 are mirror surfaces (reflecting mirrors).
  • a desiccant 16 is attached to the tip of the electrode 4, whereby the desiccant 16 is disposed inside the outer cylindrical tube 20.
  • a nitrogen gas 17 or an inert gas atmosphere is sealed inside the outer cylindrical tube 20.
  • FIG. 5 is a cross-sectional view schematically showing a configuration of a spot-type organic EL illuminator in which three white organic EL light emitting elements 30 are formed in Embodiment 5 of the present invention.
  • the organic EL illuminator of the present embodiment has a multi-cylindrical tube configuration.
  • This multi-cylindrical tube has a configuration in which, for example, three cylindrical tubes having different diameters of an outer cylindrical tube 33, an intermediate cylindrical tube 34, and an inner cylindrical tube 35 are arranged coaxially.
  • Each of the cylindrical tubes 33, 34, and 35 is made of transparent glass, and is made of, for example, a straight tube.
  • a reflective sealing component 31 is attached to one end of the outer cylindrical tube 33, and a transparent sealing component 32 is attached to the other end.
  • An O-ring 3 is disposed between the reflective sealing component 31 and the outer cylindrical tube 33 and between the transparent sealing component 32 and the outer cylindrical tube 33. The inside of the outer cylindrical tube 33 is sealed by the sealing parts 31 and 32 and the O-ring 3.
  • a white organic EL light emitting element 30 is formed inside each of the cylindrical tubes 33, 34, and 35.
  • the white organic EL light emitting element 30 includes a transparent anode 30a, a white organic EL light emitting layer 30b, and a cathode 30c, which are sequentially formed from the inside of the cylindrical tube.
  • the reflection sealing component 31 has two electrodes 4 for supplying electricity.
  • Each of the transparent anode 30 a and the cathode 30 c is connected to the electrode 4 by the electric wire 13, whereby each of the white organic EL light emitting elements 30 is electrically connected to the DC power source 14.
  • Each transparent anode 30 a is electrically connected to the + (plus) side of the DC power source 14, and the cathode 30 c is electrically connected to the ⁇ (minus) side of the DC power source 14.
  • the inner surface of the reflective sealing component 31 is a mirror surface (reflecting mirror) 15 and the transparent sealing component 32 is transparent. Thereby, the light emitted from the white organic EL light emitting element 30 is extracted from the transparent transparent sealing component 32 on one side.
  • the desiccant 16 is attached to the reflective sealing component 31, whereby the desiccant 16 is disposed inside the outer cylindrical tube 33. Inside the outer cylindrical tube 33, nitrogen gas 17 or an inert gas atmosphere is enclosed.
  • a film of Al (not shown) having a thickness of 10 ⁇ m, for example, on the outside of the outer cylindrical tube 20 by vapor deposition, light can be extracted only from the transparent sealing part 32.
  • FIG. 6 is a partially enlarged cross-sectional view schematically showing the configuration of the cylindrical tube of the cylindrical organic EL illuminator in Embodiment 6 of the present invention.
  • a cylindrical tube 41 of the cylindrical organic EL illuminator in the present embodiment is made of glass, for example, and has fine irregularities 42 on the outer peripheral surface thereof.
  • the light beam 44 coming from the inside of the cylindrical tube 41 is refracted inside the fine irregularities 42 and radiated to the outside air 43.
  • the organic EL light-emitting element only needs to have at least a transparent anode, a light-emitting layer, and a cathode, and also includes a protective layer, a hole injection layer, a hole transport layer, an electron A transport layer, an electron injection layer, an alkali metal layer, or the like may be provided as necessary.
  • the cylindrical tube having a circular shape in the cross section perpendicular to the axial direction has been described as the cylindrical tube.
  • the present invention is not limited to this, and the vertical direction is perpendicular to the axial direction.
  • the present invention can be similarly applied to a cylindrical tube having a polygonal cross section.
  • the shape of the cross section perpendicular to the axial direction of the cylindrical tube may be a perfect circle or an ellipse.
  • the cylindrical tube may be a tube extending in a curved shape other than a straight tube extending in a straight line in the axial direction.
  • a thin film of an organic EL light emitting element is sequentially formed inside transparent cylindrical glass tube 1.
  • TEOS gas 0.1 cc / min, O 2 gas 10 cc / min, and He gas 500 cc / min are placed inside a cylindrical tube 1 made of transparent blue glass having a diameter of 35 mm, a length of 300 mm, and a thickness of 1 mm.
  • the pressure is 0.01 atm, and the entire temperature of the cylindrical tube 1 is kept at 300 ° C.
  • the cylindrical tube 1 is rotated at 30 rpm, a coil is installed outside the cylindrical tube 1, a high frequency with a frequency of 13.56 MHz and an output of 100 W is applied to the coil, and plasma is generated inside the cylindrical tube 1.
  • Each source gas is decomposed by the plasma, and a protective film 5 of SiO 2 having a thickness of 10 nm is uniformly formed inside the cylindrical tube 1.
  • the protective film 5 prevents metal ions from moving from the glass to the transparent anode 6 side.
  • a plate-like ITO target is inserted inside the cylindrical tube 1, Ar gas 20 cc / min is allowed to flow, the pressure is set to 0.0001 atm, and the entire temperature of the cylindrical tube 1 is maintained at 300 ° C.
  • the cylindrical tube 1 is rotated at 30 rpm, a coil is installed outside the cylindrical tube 1, a high frequency with a frequency of 13.56 MHz and an output of 500 W is applied to the coil, and Ar plasma is generated inside the cylindrical tube 1.
  • the Ar ions collide with the surface of the ITO target, knock out the ITO, and the transparent anode 6 of ITO having a thickness of 1 ⁇ m is uniformly formed on the protective film 5.
  • a polishing material is poured inside the cylindrical tube 1, and the cylindrical tube 1 is rotated at 100 rpm while being polished using a polishing pad until the ITO surface of the transparent anode 6 becomes smooth, and then an organic solvent. And washed with pure water and dried by N 2 blow.
  • the cylindrical tube 1 is put in a glove box, and for example, the inside of the glove box is replaced with N 2 gas, and the dew point is set to ⁇ 80 ° C. or lower while the temperature is raised to 100 ° C.
  • O 2 gas 10 cc / min and Ar gas 500 cc / min are allowed to flow inside the cylindrical tube 1, the pressure is set to 0.001 atm, and the entire temperature of the cylindrical tube 1 is maintained at 50 ° C.
  • the cylindrical tube 1 is rotated at 30 rpm, a coil is installed outside the cylindrical tube 1, a high frequency with a frequency of 13.56 MHz and an output of 100 W is applied to the coil, and O 2 plasma is generated inside the cylindrical tube 1. .
  • O 2 plasma improves the work function of the ITO surface of the transparent anode 6 from 4.8 eV to 5.5 eV.
  • a gas injection nozzle is inserted inside the cylindrical tube 1, N 2 gas of 500 cc / min is allowed to flow, the pressure is set to 0.001 atm, and the temperature of the gas injection nozzle is maintained at 300 ° C.
  • the cylindrical tube 1 is rotated at 30 rpm, and the outside of the cylindrical tube 1 is kept cooled to 2 ° C.
  • the low-molecular-weight organic powder raw material for the hole injection layer, hole-transporting layer, light-emitting layer, electron-transporting layer, and electron-injecting layer and the low-molecular-weight organic powder raw material for the dopant are filled in separate powder feeders.
  • N 2 gas are sequentially supplied to the vaporizer.
  • the low molecular organic powder raw material heated to 300 ° C. in the vaporizer is instantaneously evaporated and sent to the gas injection nozzle together with N 2 gas.
  • the vaporized organic raw material is ejected together with N 2 gas from the gas injection nozzle, adheres to the inside of the cooled cylindrical tube 1, and the N 2 gas is discharged from the vacuum pump through the exhaust pipe.
  • NPD thinness 40 nm
  • Znbox2 perylene (1.5) as the electron transport blue light-emitting layer 8 in order.
  • % Thiickness 7 nm
  • Znbox2 DCM1 (0.25%)
  • thickness 23 nm as the electron transporting yellow light emitting layer 9
  • Znbox2 thickness 30 nm
  • a water-cooled cylindrical mask is inserted inside the cylindrical tube 1, and a plate-shaped metal crucible filled with LiF is inserted inside thereof.
  • the inside of the cylindrical tube 1 is evacuated, and the entire temperature of the cylindrical tube 1 is kept at 50 ° C. or lower.
  • the cylindrical tube 1 is rotated at 30 rpm, and a direct current is passed through the metal crucible to heat it.
  • LiF in the metal crucible evaporates and adheres straight from the opening of the mask toward the cylindrical tube 1. Thereby, a LiF film having a thickness of 5 nm as the alkali metal layer 11 is uniformly formed on the organic material layer (electron transport layer 10).
  • the organic EL light emitting element is formed inside the cylindrical tube 1.
  • Organic EL light-emitting elements are vulnerable to the penetration of water molecules, and entry of moisture causes deterioration of the organic EL light-emitting elements.
  • the desiccant 16 is put inside the cylindrical tube 1, and the inside of the cylindrical tube 1 is filled with N 2 gas to seal both ends of the cylindrical tube 1. Sealing uses a seal by a rubber O-ring 3.
  • the organic EL light emitting element is connected to the electrode 4 of the sealing component 2.
  • the transparent anode 6 When the transparent anode 6 is connected positively, the cathode 12 is connected negatively, a voltage is applied, and a direct current is applied, electrons and holes are recombined in the light emitting layers 8 and 9 to generate blue and yellow light. To do.
  • the generated light is emitted to the outside through the transparent anode 6 and the transparent cylindrical tube 1.
  • 10 V when 10 V is applied between the transparent anode 6 and the cathode 12, white light having a luminance of 5000 cd / m 2 can be obtained.
  • the hole transport layer 7, the electron transport blue light-emitting layer 8, the electron transport yellow light-emitting layer 9, the electron transport layer 10 and the dopant molecule are formed of a low molecular organic substance.
  • a hole injection layer, an electron injection layer, or the like made of a low molecular organic material may be additionally formed.
  • the polymer raw material that is the raw material of the polymer light emitting layer 19 shown in FIG. 3 cannot be heated and evaporated, it is dissolved in a solvent and applied by spin coating.
  • a solvent in which a polymer raw material is dissolved is dropped inside the cylindrical tube 1, and a uniform film is formed while the cylindrical tube 1 is tilted at 45 degrees and rotated at 2000 rpm, and the solvent is evaporated by heating.
  • the polymer light emitting layer 19 of polyfluorene: Ir (ppy) 3 (5%) (thickness 80 nm) is uniformly formed on the hole transport layer.
  • a transparent blue glass diameter 45 mm, length 300 mm, thickness 1 mm outer cylindrical tube, diameter 40 mm, length 300 mm, thickness 1 mm intermediate cylindrical tube, diameter 35 mm, length 300 mm, thickness prepare each with a 1 mm inner cylindrical tube.
  • ITO as a transparent anode film
  • NPD hole transport layer
  • Znbox 2 perylene (1.5% as an electron transport blue light emitting layer)
  • Thiickness 7 nm Znbox2: DCM1 (0.25%) (thickness 23 nm) as an electron transporting yellow light emitting layer
  • Znbox2 thickness 30 nm as an electron transporting layer
  • BCP 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline: Cs (thickness 20 nm) as an electron injection layer and IZO (Indium Zinc Oxide) (thickness 0.5 ⁇ m) as a transparent cathode Are sequentially formed.
  • An intermediate cylindrical tube having a diameter of 40 mm is inserted into the inside of the outer cylindrical tube having a diameter of 45 mm, and an inner cylindrical tube having a diameter of 35 mm is inserted into the intermediate cylindrical tube having a diameter of 40 mm to form a multi-cylinder tube. Connect to and seal. For example, when 10 V is applied between the transparent anode and the transparent cathode, white light having a luminance of 10000 cd / m 2 can be obtained.
  • the incident angle of light is different from the total reflection angle, and the external quantum efficiency Will improve.
  • irregularities 42 having a diameter of about 300 nm less than the optical wavelength on the outer surface of the cylindrical glass tube 41
  • the incident angle of light is different from the total reflection angle, and the external quantum efficiency Will improve.
  • white light with a luminance of 5000 cd / m 2 is obtained when 10 V is applied.
  • the luminance is improved to 6000 cd / m 2 .
  • the cylindrical organic EL illuminator of the present invention is required to have a long lifetime and high luminance because the organic EL light emitting element can be formed on a cylindrical tube to improve the luminance while suppressing deterioration of the organic EL light emitting element. It can be preferably used in certain fields.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

L'invention concerne un illuminateur comprenant un tube cylindrique (1) formé de verre transparent. Les deux extrémités du tube sont bouchées à l'aide d'une pièce (2) d'étanchéité et d'un joint torique (3). Un film protecteur (5), une électrode positive transparente (6), une couche (7) de transport de trous, une couche (8) de transport d'électrons émettant une lumière bleue, une couche (9) de transport d'électrons émettant une lumière jaune, une couche (10) de transport d'électrons, une couche (11) de métal alcalin et une électrode négative (12) sont stratifiés de façon séquentielle dans la face intérieure du tube cylindrique (1). Un courant est fourni à un élément organique EL émetteur de lumière en permettant à l'électrode positive transparente (6) d'être reliée au plus et en permettant à l'électrode négative (12) d'être reliée au moins. La surface intérieure de la pièce (2) d'étanchéité est une surface (15) en miroir. Un agent desséchant (16) est disposé sur la face intérieure du tube cylindrique (1). Du nitrure gazeux (17) est enfermé dans le tube cylindrique (1). On réalise ainsi un illuminateur EL organique dans lequel la détérioration de l'élément organique EL émetteur de lumière est supprimée et dont la luminance peut être améliorée.
PCT/JP2008/053607 2008-02-29 2008-02-29 Illuminateur el organique cylindrique WO2009107226A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2008/053607 WO2009107226A1 (fr) 2008-02-29 2008-02-29 Illuminateur el organique cylindrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2008/053607 WO2009107226A1 (fr) 2008-02-29 2008-02-29 Illuminateur el organique cylindrique

Publications (1)

Publication Number Publication Date
WO2009107226A1 true WO2009107226A1 (fr) 2009-09-03

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017194934A1 (fr) * 2016-05-11 2017-11-16 Luxtec Global Limited Unités d'éclairage non linéaires

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003142252A (ja) * 2001-11-01 2003-05-16 Harison Toshiba Lighting Corp 管状発光装置
JP2003305362A (ja) * 2002-04-18 2003-10-28 Canon Inc 流体作用装置ならびに流体に作用させる方法
JP2004127942A (ja) * 2002-10-01 2004-04-22 Eastman Kodak Co 高光抽出型有機発光ダイオード（ｏｌｅｄ）デバイス
JP2005108516A (ja) * 2003-09-29 2005-04-21 Seiko Epson Corp 有機ｅｌ装置および給電装置
WO2005112513A1 (fr) * 2004-05-17 2005-11-24 Zeon Corporation Dispositif électroluminescent, éclairage et affichage
JP2006324089A (ja) * 2005-05-18 2006-11-30 Pentax Corp 有機エレクトロルミネセンス素子

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003142252A (ja) * 2001-11-01 2003-05-16 Harison Toshiba Lighting Corp 管状発光装置
JP2003305362A (ja) * 2002-04-18 2003-10-28 Canon Inc 流体作用装置ならびに流体に作用させる方法
JP2004127942A (ja) * 2002-10-01 2004-04-22 Eastman Kodak Co 高光抽出型有機発光ダイオード（ｏｌｅｄ）デバイス
JP2005108516A (ja) * 2003-09-29 2005-04-21 Seiko Epson Corp 有機ｅｌ装置および給電装置
WO2005112513A1 (fr) * 2004-05-17 2005-11-24 Zeon Corporation Dispositif électroluminescent, éclairage et affichage
JP2006324089A (ja) * 2005-05-18 2006-11-30 Pentax Corp 有機エレクトロルミネセンス素子

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017194934A1 (fr) * 2016-05-11 2017-11-16 Luxtec Global Limited Unités d'éclairage non linéaires

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