JP4083243B2 - 有機金属錯体 - Google Patents

有機金属錯体 Download PDF

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Publication number
JP4083243B2
JP4083243B2 JP50183199A JP50183199A JP4083243B2 JP 4083243 B2 JP4083243 B2 JP 4083243B2 JP 50183199 A JP50183199 A JP 50183199A JP 50183199 A JP50183199 A JP 50183199A JP 4083243 B2 JP4083243 B2 JP 4083243B2
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Japan
Prior art keywords
complex
group
optionally substituted
aryl
otf
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JP50183199A
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Japanese (ja)
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JP2002513440A5 (https=
JP2002513440A (ja
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クリストウ，ヴィクター
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アイシス イノヴェイション リミテッド
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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
    • H05B33/12—Light sources with substantially two-dimensional [2D] radiating surfaces
    • H05B33/14—Light sources with substantially two-dimensional [2D] radiating surfaces characterised by the chemical or physical composition or the arrangement of the electroluminescent material, or by the simultaneous addition of the electroluminescent material in or onto the light source
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F5/00—Compounds containing elements of Groups 3 or 13 of the Periodic Table
    • C07F5/02—Boron compounds
    • C07F5/022—Boron compounds without C-boron linkages
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent materials, e.g. electroluminescent or chemiluminescent
    • C09K11/06—Luminescent materials, e.g. electroluminescent or chemiluminescent containing organic luminescent materials
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/30—Coordination compounds
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/30—Coordination compounds
    • H10K85/321—Metal complexes comprising a group IIIA element, e.g. Tris (8-hydroxyquinoline) gallium [Gaq3]
    • H10K85/322—Metal complexes comprising a group IIIA element, e.g. Tris (8-hydroxyquinoline) gallium [Gaq3] comprising boron
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/30—Coordination compounds
    • H10K85/351—Metal complexes comprising lanthanides or actinides, e.g. comprising europium
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/30—Coordination compounds
    • H10K85/361—Polynuclear complexes, i.e. complexes comprising two or more metal centers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
    • C09K2211/10—Non-macromolecular compounds
    • C09K2211/1003—Carbocyclic compounds
    • C09K2211/1011—Condensed systems
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
    • C09K2211/10—Non-macromolecular compounds
    • C09K2211/1018—Heterocyclic compounds
    • C09K2211/1025—Heterocyclic compounds characterised by ligands
    • C09K2211/1029—Heterocyclic compounds characterised by ligands containing one nitrogen atom as the heteroatom
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
    • C09K2211/10—Non-macromolecular compounds
    • C09K2211/1018—Heterocyclic compounds
    • C09K2211/1025—Heterocyclic compounds characterised by ligands
    • C09K2211/1044—Heterocyclic compounds characterised by ligands containing two nitrogen atoms as heteroatoms
    • 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]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
JP50183199A 1997-06-02 1998-06-01 有機金属錯体 Expired - Lifetime JP4083243B2 (ja)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9711237.9 1997-06-02
GBGB9711237.9A GB9711237D0 (en) 1997-06-02 1997-06-02 Organomettallic Complexes
PCT/GB1998/001587 WO1998055561A1 (en) 1997-06-02 1998-06-01 Organometallic complexes

Publications (3)

Publication Number Publication Date
JP2002513440A JP2002513440A (ja) 2002-05-08
JP2002513440A5 JP2002513440A5 (https=) 2005-12-22
JP4083243B2 true JP4083243B2 (ja) 2008-04-30

Family

ID=10813346

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50183199A Expired - Lifetime JP4083243B2 (ja) 1997-06-02 1998-06-01 有機金属錯体

Country Status (7)

Country Link
US (1) US7601859B2 (https=)
EP (1) EP0988353B1 (https=)
JP (1) JP4083243B2 (https=)
AU (1) AU7668198A (https=)
DE (1) DE69809739D1 (https=)
GB (1) GB9711237D0 (https=)
WO (1) WO1998055561A1 (https=)

Families Citing this family (63)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9712483D0 (en) 1997-06-17 1997-08-20 Kathirgamanathan Poopathy Fabrication of light emitting devices from chelates of transition metals, lanthanides and actinides
JP3907142B2 (ja) * 1998-08-18 2007-04-18 富士フイルム株式会社 有機エレクトロルミネツセンス素子材料およびそれを使用した有機エレクトロルミネツセンス素子
GB9820805D0 (en) * 1998-09-25 1998-11-18 Isis Innovation Divalent lanthanide metal complexes
GB9823761D0 (en) 1998-11-02 1998-12-23 South Bank Univ Entpr Ltd Novel electroluminescent materials
GB9826407D0 (en) 1998-12-02 1999-01-27 South Bank Univ Entpr Ltd Novel electroluminescent materials
GB9826405D0 (en) 1998-12-02 1999-01-27 South Bank Univ Entpr Ltd Method for forming films or layers
GB9901971D0 (en) * 1999-02-01 1999-03-17 South Bank Univ Entpr Ltd Electroluminescent material
US6872471B2 (en) 2000-03-06 2005-03-29 The Ohio State University Research Foundation Infrared emitting electroluminescent and photoluminescent devices
AU2002306698A1 (en) * 2001-03-14 2002-09-24 The Trustees Of Princeton University Materials and devices for blue phosphorescence based organic light emitting diodes
GB0109755D0 (en) 2001-04-20 2001-06-13 Elam T Ltd Devices incorporating mixed metal organic complexes
TWI303533B (en) 2001-06-15 2008-11-21 Oled T Ltd Electroluminescent devices
GB0116644D0 (en) 2001-07-09 2001-08-29 Elam T Ltd Electroluminescent materials and devices
US7303824B2 (en) 2001-08-04 2007-12-04 Oled-T Limited Electroluminescent device
US6699597B2 (en) 2001-08-16 2004-03-02 3M Innovative Properties Company Method and materials for patterning of an amorphous, non-polymeric, organic matrix with electrically active material disposed therein
GB0120828D0 (en) 2001-08-28 2001-10-17 Isis Innovation Method of driving an electroluminescent device
US6603150B2 (en) 2001-09-28 2003-08-05 Eastman Kodak Company Organic light-emitting diode having an interface layer between the hole-transporting layer and the light-emitting layer
US6610455B1 (en) 2002-01-30 2003-08-26 Eastman Kodak Company Making electroluminscent display devices
US6872472B2 (en) 2002-02-15 2005-03-29 Eastman Kodak Company Providing an organic electroluminescent device having stacked electroluminescent units
US7241512B2 (en) 2002-04-19 2007-07-10 3M Innovative Properties Company Electroluminescent materials and methods of manufacture and use
US7282275B2 (en) 2002-04-19 2007-10-16 3M Innovative Properties Company Materials for organic electronic devices
US20040004433A1 (en) 2002-06-26 2004-01-08 3M Innovative Properties Company Buffer layers for organic electroluminescent devices and methods of manufacture and use
US6939660B2 (en) 2002-08-02 2005-09-06 Eastman Kodak Company Laser thermal transfer donor including a separate dopant layer
US6890627B2 (en) 2002-08-02 2005-05-10 Eastman Kodak Company Laser thermal transfer from a donor element containing a hole-transporting layer
US6747618B2 (en) 2002-08-20 2004-06-08 Eastman Kodak Company Color organic light emitting diode display with improved lifetime
US7811675B2 (en) * 2002-11-06 2010-10-12 The University Of Hong Kong Electroluminescent metallo-supramolecules with terpyridine-based groups
US7230594B2 (en) 2002-12-16 2007-06-12 Eastman Kodak Company Color OLED display with improved power efficiency
US6975067B2 (en) 2002-12-19 2005-12-13 3M Innovative Properties Company Organic electroluminescent device and encapsulation method
WO2004058912A2 (en) * 2002-12-24 2004-07-15 Elam-T Limited Electroluminescent materials and devices
US7192657B2 (en) 2003-04-15 2007-03-20 3M Innovative Properties Company Ethynyl containing electron transport dyes and compositions
US7271406B2 (en) 2003-04-15 2007-09-18 3M Innovative Properties Company Electron transport agents for organic electronic devices
ATE383733T1 (de) 2003-11-18 2008-01-15 3M Innovative Properties Co Elektrolumineszenzbauelemente und verfahren zur herstellung von elektrolumineszenzbauelementen mit einem farbwandlungselement
US7221332B2 (en) 2003-12-19 2007-05-22 Eastman Kodak Company 3D stereo OLED display
GB0411572D0 (en) * 2004-05-24 2004-06-23 Cambridge Display Tech Ltd Light-emitting device
US7316756B2 (en) 2004-07-27 2008-01-08 Eastman Kodak Company Desiccant for top-emitting OLED
US9040170B2 (en) 2004-09-20 2015-05-26 Global Oled Technology Llc Electroluminescent device with quinazoline complex emitter
US7501152B2 (en) 2004-09-21 2009-03-10 Eastman Kodak Company Delivering particulate material to a vaporization zone
US7315042B2 (en) 2004-11-18 2008-01-01 3M Innovative Properties Company Semiconductors containing trans-1,2-bis(acenyl)ethylene compounds
US8569948B2 (en) 2004-12-28 2013-10-29 Samsung Display Co., Ltd. Electroluminescent devices and methods of making electroluminescent devices including an optical spacer
US7645478B2 (en) 2005-03-31 2010-01-12 3M Innovative Properties Company Methods of making displays
US7615501B2 (en) 2005-08-11 2009-11-10 3M Innovative Properties Company Method for making a thin film layer
US9666826B2 (en) 2005-11-30 2017-05-30 Global Oled Technology Llc Electroluminescent device including an anthracene derivative
EP1982561B1 (en) 2006-02-08 2015-07-29 3M Innovative Properties Company Method for manufacturing a film substrate at a temperature above its glass transition temperature
EP2355198B1 (en) 2006-05-08 2015-09-09 Global OLED Technology LLC OLED electron-injecting layer
US7667391B2 (en) 2006-08-04 2010-02-23 Eastman Kodak Company Electrically excited organic light-emitting diodes with spatial and spectral coherence
DE102006048202A1 (de) * 2006-10-11 2008-04-17 Universität Regensburg Lanthanoid-Emitter für OLED-Anwendungen
US7911133B2 (en) 2007-05-10 2011-03-22 Global Oled Technology Llc Electroluminescent device having improved light output
US7812531B2 (en) 2007-07-25 2010-10-12 Global Oled Technology Llc Preventing stress transfer in OLED display components
US8076009B2 (en) 2007-10-26 2011-12-13 Global Oled Technology, Llc. OLED device with fluoranthene electron transport materials
US8016631B2 (en) 2007-11-16 2011-09-13 Global Oled Technology Llc Desiccant sealing arrangement for OLED devices
US8900722B2 (en) 2007-11-29 2014-12-02 Global Oled Technology Llc OLED device employing alkali metal cluster compounds
US8877350B2 (en) 2007-12-11 2014-11-04 Global Oled Technology Llc White OLED with two blue light-emitting layers
US7947974B2 (en) 2008-03-25 2011-05-24 Global Oled Technology Llc OLED device with hole-transport and electron-transport materials
US8283054B2 (en) 2009-04-03 2012-10-09 Global Oled Technology Llc Tandem white OLED with efficient electron transfer
DE112010004188T5 (de) * 2009-10-28 2012-11-22 Sumitomo Chemical Co., Ltd. Metallkomplex mit mehrzähnigem Liganden
EP2726490B1 (de) * 2011-06-28 2015-04-29 Merck Patent GmbH Metallkomplexe
JP6204371B2 (ja) 2011-11-30 2017-09-27 ノヴァレッド ゲーエムベーハー 有機電子装置
CN104641484B (zh) 2012-09-21 2017-09-08 株式会社半导体能源研究所 发光元件、发光装置、电子设备及照明装置
US10593886B2 (en) 2013-08-25 2020-03-17 Molecular Glasses, Inc. OLED devices with improved lifetime using non-crystallizable molecular glass mixture hosts
WO2016072807A1 (ko) 2014-11-06 2016-05-12 포항공과대학교 산학협력단 유기 리간드가 치환된 페로브스카이트 나노결정입자 발광체 제조방법, 이에 의해 제조된 나노결정입자 발광체 및 이를 이용한 발광소자
US10626326B2 (en) * 2014-11-06 2020-04-21 Postech Academy-Industry Foundation Method for manufacturing perovskite nanocrystal particle light emitting body where organic ligand is substituted, nanocrystal particle light emitting body manufactured thereby, and light emitting device using same
JP7082984B2 (ja) * 2017-02-20 2022-06-09 ノヴァレッド ゲーエムベーハー 電子半導体デバイスおよびその電子半導体デバイスの製造方法および化合物
CN114057779B (zh) * 2020-07-29 2023-06-06 北京大学 混配型Ce(III)配合物及其作为电致发光材料的应用
CN116082376B (zh) * 2021-11-01 2026-04-14 北京大学 d-f跃迁稀土配合物的非掺杂器件

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5237069A (en) 1990-10-26 1993-08-17 The Dow Chemical Company Hydridotris(pyrazolyl)borate metal complexes and polymerization process
WO1993011433A1 (en) * 1991-12-05 1993-06-10 Wallac Oy Luminescent lanthanide chelates
US6358631B1 (en) * 1994-12-13 2002-03-19 The Trustees Of Princeton University Mixed vapor deposited films for electroluminescent devices
US5707745A (en) 1994-12-13 1998-01-13 The Trustees Of Princeton University Multicolor organic light emitting devices
US5627164A (en) * 1995-06-13 1997-05-06 Exxon Research And Engineering Company Pyrazolyl borates complexes-(LAW294)

Also Published As

Publication number Publication date
GB9711237D0 (en) 1997-07-23
US7601859B2 (en) 2009-10-13
AU7668198A (en) 1998-12-21
EP0988353A1 (en) 2000-03-29
JP2002513440A (ja) 2002-05-08
WO1998055561A1 (en) 1998-12-10
US20040215000A1 (en) 2004-10-28
EP0988353B1 (en) 2002-11-27
DE69809739D1 (de) 2003-01-09

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