WO2011070680A1 - Panneau électroluminescent organique et son procédé de fabrication - Google Patents

Panneau électroluminescent organique et son procédé de fabrication Download PDF

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Publication number
WO2011070680A1
WO2011070680A1 PCT/JP2009/070773 JP2009070773W WO2011070680A1 WO 2011070680 A1 WO2011070680 A1 WO 2011070680A1 JP 2009070773 W JP2009070773 W JP 2009070773W WO 2011070680 A1 WO2011070680 A1 WO 2011070680A1
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WIPO (PCT)
Prior art keywords
organic
electrode
organic layer
layer
panel
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Application number
PCT/JP2009/070773
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English (en)
Japanese (ja)
Inventor
一弘 竹田
輝一 渡辺
正宣 赤木
竜一 佐藤
Original Assignee
パイオニア株式会社
東北パイオニア株式会社
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Application filed by パイオニア株式会社, 東北パイオニア株式会社 filed Critical パイオニア株式会社
Priority to PCT/JP2009/070773 priority Critical patent/WO2011070680A1/fr
Publication of WO2011070680A1 publication Critical patent/WO2011070680A1/fr

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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/17—Passive-matrix OLED displays
    • H10K59/179—Interconnections, e.g. wiring lines or terminals
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/805—Electrodes
    • H10K59/8052—Cathodes
    • H10K59/80523—Multilayers, e.g. opaque multilayers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/14—Carrier transporting layers

Definitions

  • the present invention relates to an organic EL panel and a manufacturing method thereof.
  • An organic EL element has a structure in which an organic layer including a light emitting layer is laminated between a pair of electrodes, and an organic EL panel in which one or a plurality of organic EL elements are arranged on a substrate is structurally or It has an insulating structure that partitions electrically.
  • the insulating structure include an insulating film that partitions an electrode formed on a substrate for each pixel, a partition for separating an electrode formed on an organic layer, and the like.
  • FIG. 1 is an explanatory diagram showing an example of forming a conventional organic EL panel (a cross-sectional view cut in a direction orthogonal to the cathode barrier rib), and includes a cathode barrier for separating the cathode formed on the organic layer.
  • An example provided is shown (see Patent Document 1 below).
  • the first electrode J2 is formed in a stripe shape on the transparent glass substrate J1.
  • the first electrode J2 is made of ITO as a transparent material having a relatively high work function, and is patterned by using a general photolithography method.
  • the insulating layer J3 is formed in a matrix by spin-coating polymer polyimide so as to have a predetermined film thickness, exposing and developing, for example.
  • a cathode partition wall J4 is formed on the insulating layer J3.
  • a negative photoresist for lift-off whose UV light transmission is intentionally lowered is spin-coated and pre-baked.
  • each cathode partition J4 having an overhang portion J4a is formed so as to protrude from the substrate J1 due to the difference in developability by spray showering an alkali developer on the substrate, as shown in FIG.
  • the cross-sectional shape orthogonal to the longitudinal direction in each cathode partition J4 is a substantially inverted isosceles trapezoidal shape. With this shape of each cathode partition wall J4, when forming a second electrode (cathode) J6 described later, adjacent cathodes are separated by the cathode partition wall J4 and sufficient electrical insulation can be ensured.
  • an organic layer J5 is formed by, for example, a vacuum evaporation method as shown in FIG.
  • a metal layer such as an aluminum alloy layer is formed by, for example, a heat deposition method, and is separated from each other in a region sandwiched between the cathode barrier ribs J4 to form striped second electrodes ( Cathode) J6 is formed.
  • An opening of the insulating film J3 formed in a matrix is located at the intersection of the first electrode (anode) J2 and the second electrode (cathode) J6 that intersect each other, and this opening serves as a light emitting pixel by an organic EL element. .
  • the surface state of the first electrode serving as the surface on which the organic layer is to be formed has a great influence on the quality of the light emitting characteristics of the organic EL element. If the surface of the first electrode is uneven, the film thickness of the organic layer deposited thereon is not uniform, and light emission defects such as leakage are likely to occur in the organic EL element.
  • a technique has been developed in which a common organic layer is formed on the first electrode by coating or the like, and a light emitting layer or the like is formed on the planarized organic layer. According to this, since the common organic layer fills the unevenness of the electrode surface and flattens its surface, it becomes possible to make the film laminated thereon uniform, improve the leakage resistance, etc. Durability can be improved. Further, by adding an acceptor (dopant) to the common organic layer formed on the first electrode, the charge injection efficiency is improved, and a low voltage can be realized.
  • the organic EL panel provided with the insulating structure such as the cathode barrier rib described above when the common organic layer is formed after the insulating structure is formed on the substrate or the like, the side surface of the insulating structure becomes the common organic layer. As shown in FIG. 2, the overhang portion 4a of the cathode barrier rib J4 is filled with the common organic layer W, which causes a problem that the cathode separation function of the cathode barrier rib J4 cannot be fully exhibited.
  • a common organic layer may be formed and an insulating structure may be formed thereon before forming the above-described insulating structure.
  • the common organic layer extends to the wiring (lead-out wiring) region formed on the substrate outside the light emitting region.
  • the second electrode is formed on the organic layer, the first electrode and the second electrode can be conducted through the common organic layer applied to the wiring region. As a result, there is a problem that proper electric supply to the light emitting layer of the organic EL element cannot be performed.
  • the second electrode and the wiring region are formed when the second electrode is formed on the organic layer.
  • a connection portion with a certain wiring there is a problem that the second electrode formed at the edge of the wiring is easily disconnected, and a connection failure between the wiring and the second electrode is likely to occur.
  • the present invention is an example of a problem to deal with such a problem. That is, in an organic EL panel provided with an insulating structure, by effectively forming a common organic layer on the film formation surface of the organic layer while effectively ensuring the function of the insulating structure, It is an object of the present invention to improve performance, to make it possible to appropriately supply electricity to the light emitting layer of the organic EL element, and to solve the problem of poor connection between the wiring and the electrode. .
  • the organic EL panel and the manufacturing method thereof according to the present invention have at least the following configuration.
  • An organic EL panel in which an organic EL element in which an organic layer including a light emitting layer is stacked between a first electrode and a second electrode is formed on a substrate, wherein the organic EL element is a single or plural on the substrate.
  • the organic EL panel is characterized in that the common organic layer is divided into a first portion in contact with the first electrode and a second portion in contact with the second electrode.
  • the pattern so that the portion and the second portion in contact with the second electrode are separated.
  • FIG. 3 is an explanatory diagram (schematic diagram) showing a cross-sectional structure of an organic EL panel according to an embodiment of the present invention.
  • An organic EL panel 100 (100A, 100B, 100C) according to an embodiment of the present invention includes an organic EL in which an organic layer 13 including a light emitting layer is stacked between a first electrode 11 and a second electrode 12 on a substrate 10.
  • the element 1 is formed, and a light emitting region 10P in which one or more organic EL elements 1 are formed and a wiring 20 connected to the second electrode 12 of the organic EL element 1 are formed on the substrate 10. It has a wiring region 10Q.
  • the organic layer 13 includes a common organic layer 14 formed in the light emitting region 10P and the wiring region 10Q.
  • the common organic layer 14 is in contact with the first portion 14A in contact with the first electrode 11 and the second electrode 12.
  • the portion 14B is divided.
  • the first portion 14A and the second portion 14B are divided so that the electrical resistance between the first electrode 11 and the second electrode 12 is not smaller than the electrical resistance when the organic layer 13 is interposed.
  • the first portion 14A is covered with an organic layer 13A including a light emitting layer at a location where the first portion 14A and the second portion 14B are separated.
  • a space 15 is formed between the first portion 14A and the second portion 14B at a location where the first portion 14A and the second portion 14B are separated.
  • the insulating layer 16 is interposed between the first portion 14A and the second portion 14B at the location where the first portion 14A and the second portion 14B are separated. is doing.
  • the organic EL panel 100 (100A, 100B, 100C) having such characteristics has the organic EL even when the common organic layer 14 is formed not only in the light emitting region 10P on the substrate 10 but also in the wiring region 10Q. Since a portion having a low electrical resistance is not formed between the first electrode 11 and the second electrode 12 of the element 1, the organic EL element 1 is controlled by the voltage applied to the first electrode 11 and the second electrode 12. Light can be emitted effectively.
  • the edge portion 20E at the end of the wiring 20 can be covered with the common organic layer 14, and the second electrode 12 connected to the wiring 20 is connected to the wiring 20. It is possible to avoid the problem of being divided at the edge portion 20E at the end. Furthermore, by providing the common organic layer 14, an insulating structure portion can be formed on the surface of the layer flattened by the common organic layer 14.
  • the common organic layer 14 is formed on the first electrode 11 of the organic EL element 1, the unevenness on the first electrode can be planarized by the common organic layer 14, and a light emitting layer is formed on the common organic layer 14.
  • the thickness of the organic layer 13A can be made uniform, and the cause of light emission failure such as leakage can be eliminated.
  • an acceptor dopant
  • the charge injection efficiency is improved, and a low voltage can be realized.
  • FIG. 4 is an explanatory diagram for explaining a method of manufacturing an organic EL panel according to an embodiment of the present invention.
  • a conductive film formed directly or via another layer is patterned on the substrate 10 to form the first electrode 11 and the second electrode 12.
  • a wiring 20 connected to is formed.
  • the substrate 10 is made of glass, plastic, metal having an insulating film formed on the surface, and a conductive film is formed thereon by, for example, vapor deposition or sputtering, and the first electrode 11 and the wiring are formed by a pattern forming process such as a photolithography process. 20 patterns are formed.
  • the first electrode 11 and the wiring 20 may be formed at the same time, or may be formed in separate steps.
  • the pattern of the first electrode 11 forms the linear first electrode 11 in a stripe shape when a passively driven organic EL panel is formed.
  • a common organic layer that is one of the organic layers 13 of the organic EL element 1 is formed in the light emitting region 10P in which the first electrode 11 is formed and the wiring region 10Q in which the wiring 20 is formed. 14 is formed.
  • the common organic layer 14 may be a coating material or a vapor deposition material. When a vapor deposition material is used, the surface of the common organic layer 14 is flattened by heating to a glass transition temperature or higher after film formation.
  • the common organic layer 14 is patterned so that the first portion 14A in contact with the first electrode 11 and the second portion 14B in contact with the second electrode 12 are divided.
  • the common organic layer 14 may be divided by patterning by photoetching or mask film formation at the same time as the process 2 described above, or by partially removing the film formation by laser irradiation or the like after the process 2 is formed.
  • the first portion 14A and the second portion 14B may be divided.
  • a hole (contact hole) F for ensuring contact between the wiring 20 and the second electrode 12 may be formed in the second portion 14B.
  • step 4 shown in FIG. 4D an insulating structure (such as a partition that separates the second electrode) that partitions the components of the organic EL element 1 is formed on the common organic layer 14, and Then, another organic layer 13A is formed. At this time, in the example shown in FIG. 1A, the first portion 14A is covered with the organic layer 13A at the portion where the first portion 14A and the second portion 14B are divided.
  • an insulating structure such as a partition that separates the second electrode
  • the second electrode 12 is formed on the organic layer 13.
  • the second electrode 12 is separated by a partition formed in advance on the common organic layer 14, for example, is formed in a stripe shape in a direction intersecting the first electrode 11, and its end portion covers the wiring 20. Is done. Thereafter, an organic EL panel is obtained through a sealing process for sealing the organic EL element 1 in the light emitting region 10P.
  • the substrate 10 can be formed of glass, plastic, or the like, but a light-transmitting material is selected when the top emission method for extracting light from the substrate side is used.
  • One of the first electrode 11 and the second electrode 12 functions as an anode and the other functions as a cathode.
  • the first electrode 11 employs a transparent conductive film such as ITO when the above-described top emission method is used.
  • the cathode uses a material having a work function lower than that of the anode.
  • a magnesium alloy such as aluminum (Al) or Mg—Al can be used as the cathode.
  • a polymer material As the material of the common organic layer 14, a polymer material, a polymer material containing a low-molecular material is suitable, and a polyalkylthiophene derivative, a polyaniline derivative, triphenylamine, a sol-gel film of an inorganic compound, a Lewis acid, and the like.
  • An organic compound film, a conductive polymer, or the like can be used. Thereafter, when a partition having an electrode separation function is formed, a material that can withstand a photolithography process at the time of forming the partition is suitable.
  • NPB N, N-di (naphtalence) -N, N-dipheneyl-benzidene
  • the hole transport layer has a function of transporting holes injected from the lower electrode line 2 to the light emitting layer.
  • the hole transport layer may be a single layer or a stack of two or more layers.
  • the hole transport layer is not formed by a single material, but a single layer may be formed by a plurality of materials, and a guest material having a high charge donating (accepting) property may be formed on a host material having a high charge transport capability. Doping may be performed.
  • red (R), green (G), and blue (B) light-emitting layers are formed in respective film formation regions by using a resistance heating vapor deposition method using a coating mask.
  • red (R) an organic material that emits red light such as a styryl dye such as DCM1 (4- (dicyanomethylene) -2-methyl-6- (4′-dimethylaminostyryl) -4H-pyran) is used.
  • An organic material that emits green light such as an aluminum quinolinol complex (Alq 3 ) is used as green (G).
  • an organic material emitting blue light such as a distyryl derivative or a triazole derivative is used.
  • a distyryl derivative or a triazole derivative is used.
  • other materials or a host-guest layer structure may be used, and the light emission form may be a fluorescent light emitting material or a phosphorescent light emitting material.
  • the electron transport layer formed on the light emitting layer is formed by using various materials such as an aluminum quinolinol complex (Alq 3 ) by various film forming methods such as resistance heating vapor deposition.
  • the electron transport layer has a function of transporting electrons injected from the upper electrode line 3 to the light emitting layer.
  • This electron transport layer may have a multilayer structure in which only one layer is stacked or two or more layers are stacked.
  • the electron transport layer may be formed of a plurality of materials instead of a single material, and a guest material having a high charge donating (accepting) property may be formed on a host material having a high charge transport capability. It may be formed by doping.
  • FIG. 5 is a plan view (FIG. 5A) and a cross-sectional view (FIG. 5B) showing a more specific configuration example of the organic EL panel according to the embodiment of the present invention. -X sectional view).
  • the first portion 14 ⁇ / b> A is in contact with the first electrode 11
  • the second portion 14 ⁇ / b> B is in contact with the second electrode 12 and the wiring 20 connected to the second electrode 12.
  • the second electrode 12 is separated from the wiring 20 by the electrode separation partition 31.
  • the second portion 14B is formed so as to cover at least the edge portion 20E at the end portion of the wiring 20, and an open contact portion 14B1 is formed on the upper surface of the wiring 20.
  • the second portion 14 is formed such that a portion (14 B 2) in contact with the second electrode 12 is inclined with respect to the surface of the substrate 10.
  • the second electrode 12 formed so as to cover the second portion 14B comes into contact with the wiring 20 at the contact portion 14B1, the second electrode 12 and the wiring 20 can ensure good connection with each other.
  • the portion 14B2 where the second electrode 12 and the second portion 14B are in contact with each other is inclined with respect to the surface of the substrate 10, the second electrode 12 having a sufficient thickness is laminated on the second portion 14B. Disconnection of the two electrodes 12 can be avoided.
  • the first electrode 11 in contact with the first portion 14A and the second electrode 12 or wiring in contact with the second portion 14B 20 does not conduct in a state of low electrical resistance, and sufficient supply of electricity to the light emitting layer of the organic EL element 1 can be ensured.
  • FIG. 6 (a) to 6 (c) are explanatory views showing other embodiments of the present invention. These embodiments show an example in which an insulating structure (hereinafter referred to as an insulating structure) that partitions the components of the organic EL element 1 is formed on the common organic layer 14.
  • an insulating structure hereinafter referred to as an insulating structure
  • an electrode separation partition wall 31 (including a cathode partition wall) having a function of separating the second electrode 12 formed on the organic layer 13 is formed as the insulating structure 30. is there.
  • the electrode separation partition wall 31 has the above-described overhang portion 31A on its side surface, and the cross-sectional shape is substantially inverted isosceles trapezoidal or T-shaped as shown in the figure.
  • the electrode separation partition wall 31 is formed on the common organic layer 14, the film forming material for the common organic layer 14 is applied to the overhang portion 31A of the electrode separation partition wall 31.
  • the electrode separation function of the electrode separation partition 31 can be ensured appropriately.
  • the conductive layer formed on the organic layer 13 is surely divided at the upper edge of the electrode separation wall 31, and it is possible to form the properly separated second electrode 12 between the electrode separation partitions 31. Become.
  • the common organic layer 14 can be formed flat with a uniform film thickness, and the film thickness of the organic layer 13 stacked thereon can be made uniform. Since the organic layer 13 having a uniform thickness can be formed, the occurrence factor of light emission failure such as leakage is reduced, and the organic EL panel 100 (100a) can obtain good light emission performance and durability performance.
  • the common organic layer 14 preferably has alkali resistance, and has sufficient resistance to a chemical solution used in a photolithography process when forming the electrode separation partition 31 on the common organic layer 14.
  • the formation of the electrode separation partition 31 does not cause a problem that the surface of the common organic layer 14 is roughened or the common organic layer 14 is eroded, and the effectiveness of the common organic layer 14 is sufficiently exhibited. It becomes possible to do.
  • an organic EL panel 100 (100a) that sufficiently realizes low voltage driving that exhibits the excellent charge injection and transport performance of the common organic layer 14, improvement of light emitting performance, high temperature reliability, and the like. .
  • the organic EL panel 100 (100b) shown in FIG. 4B is obtained by forming an insulating film 32 as an insulating structure 30 that partitions a light emitting pixel made of the organic EL element 1.
  • the insulating film 32 has a matrix-shaped opening 32A formed on the common organic layer 14.
  • An organic layer 13 is formed on the common organic layer 14 in the opening 32 ⁇ / b> A, and a conductive material layer for the second electrode 12 is formed on the organic layer 13.
  • the organic EL panel 100 (100b) since the organic EL panel 100 (100b) has the insulating film 32 formed on the common organic layer 14, the film forming material of the common organic layer 14 is applied to the side surface of the insulating film 32. Therefore, the aperture ratio of the light-emitting pixel formed by the insulating film 32 can be appropriately ensured.
  • the insulating film 32 is formed on the common organic layer 14, so that no obstacles hinder the flatness of the film formation when the common organic layer 14 is formed. Accordingly, the common organic layer 14 can be formed flat with a uniform film thickness, and the film thickness of the organic layer 13 stacked thereon can be made uniform. Since the organic layer 13 having a uniform film thickness can be formed, the occurrence factor of light emission failure such as leakage is reduced, and the organic EL panel 100 (100b) can obtain good light emission performance and durability performance.
  • the common organic layer 14 has alkali resistance, the common organic layer 14 has sufficient resistance to chemicals used in the photolithography process when the insulating film 32 is formed on the common organic layer 14. Therefore, the formation of the insulating film 32 does not cause a problem that the surface of the common organic layer 14 is roughened or the common organic layer 14 is eroded, and the effectiveness of the common organic layer 14 can be sufficiently exhibited. It becomes possible. Accordingly, it is possible to obtain the organic EL panel 100 (100b) that sufficiently realizes the low voltage driving that exhibits the excellent charge injection and transport performance of the common organic layer 14, the improvement of the light emitting performance, the high temperature reliability, and the like. .
  • a support partition wall 33 that supports the sealing substrate 41 is formed as the insulating structure 30.
  • the organic EL panel 100 (100c) includes a sealing substrate 41 bonded to the substrate 10 via an adhesive layer 40, and an airtight sealing space S1 formed between the substrate 10 and the sealing substrate 41.
  • the components of the organic EL element 1 (the first electrode 11, the second electrode 12, the organic layer 13, and the common organic layer 14) are disposed therein.
  • the support partition wall 33 is formed such that its end face (upper end face in the figure) and the inner surface of the sealing substrate 41 come into contact with each other.
  • the support partition 33 also has the above-described electrode separation function.
  • the organic EL panel 100 (100c) since the organic EL panel 100 (100c) has the support partition 33 formed on the common organic layer 14, the common organic layer 14 is not applied to the side surface of the support partition 33, and the support is performed.
  • the electrode separation function of the partition wall 33 can be ensured.
  • the support partition wall 33 by forming the support partition wall 33 on the common organic layer 14, there is no obstacle that prevents the flatness of the film formation when the common organic layer 14 is formed. Accordingly, the common organic layer 14 can be formed flat with a uniform film thickness, and the film thickness of the organic layer 13 stacked thereon can be made uniform.
  • the common organic layer 14 has alkali resistance
  • the chemical solution used in the photolithography process when forming the support partition 33 on the common organic layer 14 is sufficient as in the above-described example. Has resistance. Therefore, the formation of the support partition 33 does not cause a problem that the surface of the common organic layer 14 is roughened or the common organic layer 14 is eroded, and the effectiveness of the common organic layer 14 can be sufficiently exhibited. It becomes possible.

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  • Electroluminescent Light Sources (AREA)

Abstract

L'invention concerne un panneau électroluminescent (EL) organique ayant des performances améliorées grâce à la formation d'une couche organique commune sur des surfaces sur lesquelles des couches organiques doivent être formées. Dans le panneau EL organique (100), un élément EL organique (1), dans lequel la couche organique (13) comprenant la couche électroluminescente est stratifiée entre une première électrode (11) et une seconde électrode (12), est formé sur un substrat (10). Sur le substrat (10), le panneau EL organique comporte une région électroluminescente (10P) dans laquelle un ou une pluralité des éléments organiques (1) sont formés, et une région de câblage (10Q) dans laquelle est formé un câblage (20) connecté à la seconde électrode (12) de l'élément EL organique (1). La couche organique (13) est dotée de la couche organique commune (14) qui est formée dans la région électroluminescente (10P) et dans la région de câblage (10Q), et dans la couche organique commune (14), une première partie (14A) en contact avec la première électrode (11) et une seconde partie (14B) en contact avec la seconde électrode (12) sont séparées l'une de l'autre.
PCT/JP2009/070773 2009-12-11 2009-12-11 Panneau électroluminescent organique et son procédé de fabrication WO2011070680A1 (fr)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000173781A (ja) * 1998-12-09 2000-06-23 Sony Corp 有機エレクトロルミネッセンス表示装置及びその製造方法
JP2000243558A (ja) * 1999-02-16 2000-09-08 Tohoku Pioneer Corp 発光ディスプレイパネル及びその製造方法
JP2000252063A (ja) * 1999-03-01 2000-09-14 Toppan Printing Co Ltd 色切換発光素子、色切換発光素子用基板及びカラー表示装置
JP2004311230A (ja) * 2003-04-08 2004-11-04 Pioneer Electronic Corp 発光ディスプレイパネル及びその製造方法
WO2008149498A1 (fr) * 2007-05-31 2008-12-11 Panasonic Corporation Dispositif électroluminescent organique et procédé de fabrication correspondant
WO2008149499A1 (fr) * 2007-05-30 2008-12-11 Panasonic Corporation Panneau d'affichage électroluminescent organique et procédé de fabrication correspondant

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000173781A (ja) * 1998-12-09 2000-06-23 Sony Corp 有機エレクトロルミネッセンス表示装置及びその製造方法
JP2000243558A (ja) * 1999-02-16 2000-09-08 Tohoku Pioneer Corp 発光ディスプレイパネル及びその製造方法
JP2000252063A (ja) * 1999-03-01 2000-09-14 Toppan Printing Co Ltd 色切換発光素子、色切換発光素子用基板及びカラー表示装置
JP2004311230A (ja) * 2003-04-08 2004-11-04 Pioneer Electronic Corp 発光ディスプレイパネル及びその製造方法
WO2008149499A1 (fr) * 2007-05-30 2008-12-11 Panasonic Corporation Panneau d'affichage électroluminescent organique et procédé de fabrication correspondant
WO2008149498A1 (fr) * 2007-05-31 2008-12-11 Panasonic Corporation Dispositif électroluminescent organique et procédé de fabrication correspondant

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