WO1997016053A1 - Systeme stratifie electroluminescent - Google Patents

Systeme stratifie electroluminescent Download PDF

Info

Publication number
WO1997016053A1
WO1997016053A1 PCT/DE1996/001872 DE9601872W WO9716053A1 WO 1997016053 A1 WO1997016053 A1 WO 1997016053A1 DE 9601872 W DE9601872 W DE 9601872W WO 9716053 A1 WO9716053 A1 WO 9716053A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
metal
electroluminescent device
electrode
electroluminescent
Prior art date
Application number
PCT/DE1996/001872
Other languages
German (de)
English (en)
Inventor
Wolfgang Grothe
Martin Hueppauff
Claus Schmidt
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19603746A external-priority patent/DE19603746A1/de
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO1997016053A1 publication Critical patent/WO1997016053A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces
    • 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
    • H05B33/02—Details
    • H05B33/04—Sealing arrangements, e.g. against humidity
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
    • H10K50/844—Encapsulations
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
    • H10K50/846—Passivation; Containers; Encapsulations comprising getter material or desiccants

Definitions

  • the invention relates to an electroluminescent layer system according to the preamble of claim 1.
  • Electroluminescent layer systems are known. In these, either inorganic or organic substances are used, which can be excited by means of an electrical voltage to emit light beams.
  • the light-emitting substances are arranged, for example, between planar electrodes, with a first electrode being a hole-injecting electrode (anode) and a second electrode being an electron-injecting electrode (cathode). If the light-emitting substance is formed from an organic material, the excitation can take place via a DC voltage source.
  • the anode with the positive pole is the DC voltage source and the cathode connected to the minus pole of the DC voltage source.
  • the covering layer which consists, for example, of pure metals, of codeposed metal composites or of codeposed composites that have metallic and organic components, has the disadvantage that, for example in the case of structured cathodes to produce certain light effects, the areas present between the cathodes are not protected with the cover layer.
  • the electroluminescent device according to the invention with the features mentioned in claim 1 offers the advantage over the one hand that there is on the one hand an efficient protection which exists between the electrodes and the organic material and organic material itself against oxygen and water, and the electroluminescent Layer system can be made flexible overall. Because the encapsulation consists of a multilayer system, the layers of the multilayer system preferably being flexible and adapting to the geometry of the electroluminescent layer system, it is advantageously possible to create an overall flat electroluminescent layer system which is flexible in structure and one has extremely low permeation of oxygen and water.
  • a first layer consisting of plastic is provided, which is covered by a second layer consisting of metal, a metal alloy or a metal oxide.
  • a second layer consisting of metal, a metal alloy or a metal oxide is provided.
  • the metal layer preferably consists of a metal, the one forms a stable passivation layer on the surface, so that there is also long-term stability of the electroluminescent layer system.
  • an additional so-called getter layer is provided between the plastic layer and the metal layer. In this way it is very advantageously achieved that any residues which may occur can be bound to oxygen or water through the getter layer, so that these cannot contribute to a degradation of the organic material.
  • the only figure shows an electroluminescent device, generally designated 10.
  • the device 10 has an electroluminescent layer system 12, which consists of a light-emitting organic material 14, a first electrode 16 and a second electrode 18 is formed.
  • the electrodes 16 and 18 and the organic material 14 are flat.
  • the electrodes 16 and 18 are connected to a voltage source 20, for example a DC voltage source.
  • the electrode 16 is connected to the positive pole of the voltage source 20 and the electrode 18 to the negative pole of the voltage source 20.
  • the electrode 16 consists of a material with a high electron work function.
  • the electrode 16 can, for example, consist of a metal or a metallic alloy or a metal oxide, for example indium tin oxide (ITO).
  • ITO indium tin oxide
  • the second electrode 18 consists of a material with a low electron work function, which for example is less than 4 eV.
  • the electrode 18 consists of an electrically conductive material, for example a metal, a metal alloy or a metal oxide.
  • the electrode 18 can be made of aluminum, indium, magnesium, calcium, a magnesium-silver alloy or a magnesium-indium alloy, for example.
  • the light-emitting organic material 14 contains at least one organic compound which is capable of emitting light when the voltage is applied.
  • the color of the emitted light is determined by the chemical structure of the organic substance used.
  • suitable light-emitting organic materials 14 are polymers, low molecular weight organic compounds, monomers or molecularly doped polymers. Further layers (not shown here) can be arranged between the electrodes 16 and 18, which also serve to emit light or to transport charge carriers to the light-emitting organic material 14.
  • the electroluminescent layer system 12 is applied to a carrier 22.
  • Both the electrode 16 connected as the anode and the carrier 20 are optically transparent or semi-transparent, so that the light generated by the light-emitting organic material 14 can be emitted to the outside by the entire device 10.
  • the electrodes 16 and 18 and the layers resulting in the organic material 14 are arranged partially overlapping on the carrier 22, so that the connection regions 24 and 26 of the electrodes 18 and 16 on the carrier 22 rest and are led out laterally from an encapsulation 28 to be explained.
  • An insulator 30 is arranged between the electrodes 16 and 18, which can consist, for example, of aluminum oxide.
  • the encapsulation 28 consists of a multilayer system 32 which has a first layer 34 made of a plastic and a second layer 36 made of a metal, a metal alloy or a metal oxide.
  • the plastic layer 34 can consist, for example, of an acrylic resin, alkyd resin, epoxy resin, polyurethane resin, EVOH, polyester, PMMA or other polymers. This plastic layer is applied to the electroluminescent layer system 12, for example by spin coating, printing or extrusion. In addition, the electroluminescent layer system 12 can be immersed in a corresponding bath, so that the plastic layer 34 is dip-coated.
  • the manner in which the plastic layer 34 is applied means that it adapts to the contour of the electroluminescent layer system 12 and thus surrounds and thus encloses it on all sides - with the exception of the connection regions 26 and 24.
  • the plastic layer 34 is then thermally or radiation-induced hardened or cross-linked so that a stable but flexible hood results.
  • a getter layer 38 is applied between the plastic layer 34 and the metal layer 36.
  • the getter layer 38 consists of a material which has a binding effect on oxygen and water.
  • the getter layer 38 consists, for example, of a metal which has a lower electron work function than the material of the electrode 18 connected as the cathode. If the electrode 18 consists of magnesium, for example, calcium, lithium or strontium can be used as the material for the getter layer 38.
  • the second layer 36 is applied to the getter layer 38.
  • the layer 36 is selected here in such a way that the getter layer 38 is completely enclosed, so that it has no contact with the outside.
  • the second layer 36 consists, for example, of a metal, for example aluminum, copper, nickel, chromium, tin or tantalum, a metal alloy, for example nickel-chromium or a metal oxide, for example aluminum oxide or silicon oxide, or a nitride layer, for example aluminum nitride or Silicon nitride.
  • the layer 36 can preferably be sputtered or evaporated onto the previously applied plastic layer 34 and the getter layer 36.
  • a stable passivation of the entire device 10 is achieved by the layer 36, which forms the outer closure of the encapsulation 28, so that this is long-term stable against external influences.
  • the multilayer system 32 thus has an extremely low permeation for oxygen and water.
  • the multilayer system consists of at least two layers, namely the plastic layer 34 and the metallic cover layer 36 or, in the case of an additional arrangement of the getter layer 38, consists of three layers of thinly applied materials, the flexibility of the device 10 essentially does not increase impaired. It is thus possible, despite the arrangement of the encapsulation 28, to adapt the electroluminescent device to the corresponding applications after production, that is to say after the structure of the layer systems.

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

L'invention concerne un dispositif électroluminescent comprenant un système stratifié électroluminescent formé d'un matériau organique émetteur lumineux disposé entre deux électrodes pouvant être connectées à une source de tension continue, la première électrode étant une électrode (anode) d'injection de trous, et la deuxième électrode étant une électrode (cathode) d'injection d'électrons, ainsi qu'un blindage. Conformément à l'invention, le blindage (28) est constitué par un système multicouche (32).
PCT/DE1996/001872 1995-10-20 1996-09-26 Systeme stratifie electroluminescent WO1997016053A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19539050 1995-10-20
DE19539050.4 1995-10-20
DE19603746A DE19603746A1 (de) 1995-10-20 1996-02-02 Elektrolumineszierendes Schichtsystem
DE19603746.8 1996-02-02

Publications (1)

Publication Number Publication Date
WO1997016053A1 true WO1997016053A1 (fr) 1997-05-01

Family

ID=26019630

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1996/001872 WO1997016053A1 (fr) 1995-10-20 1996-09-26 Systeme stratifie electroluminescent

Country Status (1)

Country Link
WO (1) WO1997016053A1 (fr)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000036661A1 (fr) * 1998-12-17 2000-06-22 Cambridge Display Technology Ltd. Dels organiques
US6383664B2 (en) 1999-05-11 2002-05-07 The Dow Chemical Company Electroluminescent or photocell device having protective packaging
US7005798B2 (en) 1999-04-28 2006-02-28 E. I. Du Pont De Nemours And Company Flexible organic electronic device with improved resistance to oxygen and moisture degradation
US7018713B2 (en) 2003-04-02 2006-03-28 3M Innovative Properties Company Flexible high-temperature ultrabarrier
KR100784355B1 (ko) * 2000-03-27 2007-12-13 가부시키가이샤 한도오따이 에네루기 켄큐쇼 자기 발광 장치 및 이를 제조하기 위한 방법
US8227040B2 (en) 2006-12-29 2012-07-24 3M Innovative Properties Company Method of curing metal alkoxide-containing films
US8846169B2 (en) 2007-12-28 2014-09-30 3M Innovative Properties Company Flexible encapsulating film systems
US8900366B2 (en) 2002-04-15 2014-12-02 Samsung Display Co., Ltd. Apparatus for depositing a multilayer coating on discrete sheets
US8904819B2 (en) 2009-12-31 2014-12-09 Samsung Display Co., Ltd. Evaporator with internal restriction
US8955217B2 (en) 1999-10-25 2015-02-17 Samsung Display Co., Ltd. Method for edge sealing barrier films
EP2857443A1 (fr) 2005-07-20 2015-04-08 3M Innovative Properties Company Revêtements de barrière contre l'humidité
US9184410B2 (en) 2008-12-22 2015-11-10 Samsung Display Co., Ltd. Encapsulated white OLEDs having enhanced optical output
US9337446B2 (en) 2008-12-22 2016-05-10 Samsung Display Co., Ltd. Encapsulated RGB OLEDs having enhanced optical output
US9481927B2 (en) 2008-06-30 2016-11-01 3M Innovative Properties Company Method of making inorganic or inorganic/organic hybrid barrier films
US9822454B2 (en) 2006-12-28 2017-11-21 3M Innovative Properties Company Nucleation layer for thin film metal layer formation
US9839940B2 (en) 2002-04-15 2017-12-12 Samsung Display Co., Ltd. Apparatus for depositing a multilayer coating on discrete sheets
US10950821B2 (en) 2007-01-26 2021-03-16 Samsung Display Co., Ltd. Method of encapsulating an environmentally sensitive device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0326615A1 (fr) * 1986-09-19 1989-08-09 Kabushiki Kaisha Komatsu Seisakusho Dispositif el a film mince
EP0350907A2 (fr) * 1988-07-14 1990-01-17 Sharp Kabushiki Kaisha Panneau électroluminescent à film mince
EP0372489A2 (fr) * 1988-12-05 1990-06-13 Mitsubishi Chemical Corporation Film imperméable
US5189405A (en) * 1989-01-26 1993-02-23 Sharp Kabushiki Kaisha Thin film electroluminescent panel
JPH07282975A (ja) * 1994-04-14 1995-10-27 Matsushita Electric Ind Co Ltd 有機ｅｌ素子及びその製造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0326615A1 (fr) * 1986-09-19 1989-08-09 Kabushiki Kaisha Komatsu Seisakusho Dispositif el a film mince
EP0350907A2 (fr) * 1988-07-14 1990-01-17 Sharp Kabushiki Kaisha Panneau électroluminescent à film mince
EP0372489A2 (fr) * 1988-12-05 1990-06-13 Mitsubishi Chemical Corporation Film imperméable
US5189405A (en) * 1989-01-26 1993-02-23 Sharp Kabushiki Kaisha Thin film electroluminescent panel
JPH07282975A (ja) * 1994-04-14 1995-10-27 Matsushita Electric Ind Co Ltd 有機ｅｌ素子及びその製造方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 95, no. 010 *

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000036661A1 (fr) * 1998-12-17 2000-06-22 Cambridge Display Technology Ltd. Dels organiques
US6960877B1 (en) 1998-12-17 2005-11-01 Cambrdige Display Technology Limited Organic light-emitting devices including specific barrier layers
US7005798B2 (en) 1999-04-28 2006-02-28 E. I. Du Pont De Nemours And Company Flexible organic electronic device with improved resistance to oxygen and moisture degradation
US6383664B2 (en) 1999-05-11 2002-05-07 The Dow Chemical Company Electroluminescent or photocell device having protective packaging
US8955217B2 (en) 1999-10-25 2015-02-17 Samsung Display Co., Ltd. Method for edge sealing barrier films
KR100784355B1 (ko) * 2000-03-27 2007-12-13 가부시키가이샤 한도오따이 에네루기 켄큐쇼 자기 발광 장치 및 이를 제조하기 위한 방법
US7462384B2 (en) 2000-03-27 2008-12-09 Semiconductor Energy Laboratory Co., Ltd. Self-light emitting device and method of manufacturing the same
US9839940B2 (en) 2002-04-15 2017-12-12 Samsung Display Co., Ltd. Apparatus for depositing a multilayer coating on discrete sheets
US8900366B2 (en) 2002-04-15 2014-12-02 Samsung Display Co., Ltd. Apparatus for depositing a multilayer coating on discrete sheets
US7018713B2 (en) 2003-04-02 2006-03-28 3M Innovative Properties Company Flexible high-temperature ultrabarrier
US7980910B2 (en) 2003-04-02 2011-07-19 3M Innovative Properties Company Flexible high-temperature ultrabarrier
US7940004B2 (en) 2003-04-02 2011-05-10 3M Innovative Properties Company Flexible high-temperature ultrabarrier
EP2277698A1 (fr) 2003-04-02 2011-01-26 3M Innovative Properties Company Ultra-barriere flexible haute-temperature
US7486019B2 (en) 2003-04-02 2009-02-03 3M Innovative Properties Company Flexible high-temperature ultrabarrier
EP3121003A1 (fr) 2003-04-02 2017-01-25 3M Innovative Properties Company Ultra-barriere flexible haute-temperature
EP2857443A1 (fr) 2005-07-20 2015-04-08 3M Innovative Properties Company Revêtements de barrière contre l'humidité
US9822454B2 (en) 2006-12-28 2017-11-21 3M Innovative Properties Company Nucleation layer for thin film metal layer formation
US8227040B2 (en) 2006-12-29 2012-07-24 3M Innovative Properties Company Method of curing metal alkoxide-containing films
US10950821B2 (en) 2007-01-26 2021-03-16 Samsung Display Co., Ltd. Method of encapsulating an environmentally sensitive device
US8846169B2 (en) 2007-12-28 2014-09-30 3M Innovative Properties Company Flexible encapsulating film systems
US9481927B2 (en) 2008-06-30 2016-11-01 3M Innovative Properties Company Method of making inorganic or inorganic/organic hybrid barrier films
US9362530B2 (en) 2008-12-22 2016-06-07 Samsung Display Co., Ltd. Encapsulated white OLEDs having enhanced optical output
US9337446B2 (en) 2008-12-22 2016-05-10 Samsung Display Co., Ltd. Encapsulated RGB OLEDs having enhanced optical output
US9184410B2 (en) 2008-12-22 2015-11-10 Samsung Display Co., Ltd. Encapsulated white OLEDs having enhanced optical output
US8904819B2 (en) 2009-12-31 2014-12-09 Samsung Display Co., Ltd. Evaporator with internal restriction

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