WO2002087288A1 - Matiere electroluminescente emettant une lumiere verte - Google Patents

Matiere electroluminescente emettant une lumiere verte Download PDF

Info

Publication number
WO2002087288A1
WO2002087288A1 PCT/GB2002/001884 GB0201884W WO02087288A1 WO 2002087288 A1 WO2002087288 A1 WO 2002087288A1 GB 0201884 W GB0201884 W GB 0201884W WO 02087288 A1 WO02087288 A1 WO 02087288A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
electroluminescent device
iii
chelate
electrode
Prior art date
Application number
PCT/GB2002/001884
Other languages
English (en)
Inventor
Poopathy Kathirgamanathan
Original Assignee
Elam-T Limited
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
Application filed by Elam-T Limited filed Critical Elam-T Limited
Publication of WO2002087288A1 publication Critical patent/WO2002087288A1/fr

Links

Classifications

    • 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, e.g. electroluminescent, chemiluminescent materials
    • C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials 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
    • H10K85/10—Organic polymers or oligomers
    • 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
    • H10K85/10—Organic polymers or oligomers
    • H10K85/111—Organic polymers or oligomers comprising aromatic, heteroaromatic, or aryl chains, e.g. polyaniline, polyphenylene or polyphenylene vinylene
    • 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
    • H10K85/10—Organic polymers or oligomers
    • H10K85/111—Organic polymers or oligomers comprising aromatic, heteroaromatic, or aryl chains, e.g. polyaniline, polyphenylene or polyphenylene vinylene
    • H10K85/113—Heteroaromatic compounds comprising sulfur or selene, e.g. polythiophene
    • 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
    • H10K85/311—Phthalocyanine
    • 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]
    • H10K85/324—Metal complexes comprising a group IIIA element, e.g. Tris (8-hydroxyquinoline) gallium [Gaq3] comprising aluminium, e.g. Alq3
    • 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
    • H10K85/60—Organic compounds having low molecular weight
    • 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
    • H10K85/60—Organic compounds having low molecular weight
    • H10K85/631—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine

Definitions

  • the present invention relates to electroluminescent devices.
  • Liquid crystal devices and devices which are based on inorganic semiconductor systems are widely used, however these suffer from the disadvantages of high energy consumption, high cost of manufacture, low quantum efficiency and the inability to make flat panel displays.
  • Organic polymers have been proposed as useful in electroluminescent devices, but it is not possible to obtain pure colours, they are expensive to make and have a relatively low efficiency.
  • aluminium quinolate Another compound which has been proposed is aluminium quinolate, but this requires dopants to be used to obtain a range of colours and has a relatively low efficiency.
  • Kido et al disclosed that a terbium III acetyl acetonate complex was green electroluminescent and in an article in Applied Physics letters 65 (17) 24 October 1994 Kido et al disclosed that a europium III triphenylene diamine complexes was red electroluminescent but these were unstable in atmospheric conditions and difficult to produce as films.
  • Patent application WO98/58037 describes a range of lanthanide complexes which can be used in electroluminescent devices which have improved properties and give better results.
  • Patent Applications PCT/GB98/01773, PCT/GB99/03619, PCT/GB99/04030, PCT/GB99/04024, PCT/GB99/04028, PCT/GB00/00268 describe electroluminescent complexes, structures and devices using rare earth chelates.
  • US Patent 5128587 discloses an electroluminescent device which consists of an organometallic complex of rare earth elements of the lanthanide series sandwiched between a transparent electrode of high work function and a second electrode of low work function with a hole conducting layer interposed between the electroluminescent layer and the transparent high work function electrode and an electron conducting layer interposed between the electroluminescent layer and the electron injecting low work function anode.
  • the characteristics of the emitted light such as its wavelength distribution, frequency, phase, intensity etc. and the properties of the device such as its efficiency, power consumption, optimum voltage brightness, speed of response temperature stability etc. depend on the selection from a wide range of variables such as the selection of the metal, the selection of the ligands, the nature of the electrodes and any layers formed on the electrodes, the hole transmitting and the electron donating or transmitting materials etc.
  • particular compounds or materials need to be selected from a wide range of variables and it has been found that the selection of a material or materials to enhance one property can have a deleterious effect on other properties.
  • an electroluminescent device which comprises (i) a layer of a Tb(III)chelate and (ii) a layer of BCP, which structure emits a substantially saturated green light when an electric current is passed through it.
  • substantially saturated green light By a substantially saturated green light is meant light which falls on or near the boundary line in the green spectrum on a colour chromacity chart. A chart is shown in fig. 18 and saturated green is on or close to the boundary line at 550nm. In the present invention by substantially saturated green light is meant light which has is within the boundary line (1) in fig. 18 of the accompanying drawings.
  • the invention also provides an electroluminescent device which comprises (i) a first electrode, (ii) a layer of a hole transmitting material, (iii) an electroluminescent layer comprising a Tb(III)chelate (iv) a BCP layer, (v) a layer of an electron transmitting material and (vi) a second electrode.
  • BCP is bathocupron.
  • the terbium(III) chelate preferably is of formula Tb(L ⁇ ) 3 (L p ) where (L ⁇ ) is preferably tmhd [tris (2,2,6,6- tetramethyl-3,5- heptanedionato)] and (L p ) is OPNP where OPNP includes OPNP itself and
  • each Ph which can be the same or different and can be a phenyl (OPNP) or a substituted phenyl group, other substituted or unsubstituted aromatic group, a substituted or unsubstituted heterocyclic or polycyclic group, a substituted or unsubstituted fused aromatic group such as a naphthyl, anthracene, phenanthrene, perylene or pyrene group.
  • the substituents can be for example an alkyl, aralkyl, alkoxy, aromatic, heterocyclic, polycyclic group, halogen such as fluorine, cyano, amino and substituted amino groups etc. Examples are given in figs.
  • R, R 1; R 2j R 3 and R 4 can be the same or different and are selected from hydrogen, hydrocarbyl groups, substituted and unsubstituted aromatic, heterocyclic and polycyclic ring structures, fluorocarbons such as trifluoryl methyl groups, halogens such as fluorine or thiophenyl groups; R, R 1; R 2; R 3 and R 4 can also form substituted and unsubstituted fused aromatic, heterocyclic and polycyclic ring structures and can be copolymerisable with a monomer e.g. styrene.
  • R, R 1; R > R 3 and R 4 can also be unsaturated alkylene groups such as vinyl groups or groups where R is as above.
  • L p can also be compounds of formulae
  • L p can also be
  • L p are as shown in figs. 4 to 8.
  • the Tb(III)chelate comprises Tris (2,2,6,6- tetramethyl-3,5- heptanedionato) Terbium (III) OPNP, [Tb(tmhd) 3 OPNP] wher OPNP is (I) above.
  • the first electrode is preferably a transparent substrate which is a conductive glass or plastic material which acts as the anode
  • preferred substrates are conductive glasses such as indium tin oxide coated glass, but any glass which is conductive or has a conductive layer can be used.
  • Conductive polymers and conductive polymer coated glass or plastics materials can also be used as the substrate.
  • the electron transmitting material is a material which will transport electrons when an electric current is passed through electron transmitting materials include a metal complex such as a metal quinolate e.g. an aluminium quinolate, lithium quinolate a cyano anthracene such as 9,10 dicyano anthracene, a polystyrene sulphonate and compounds of formulae shown in figs. 9 and 10.
  • a metal complex such as a metal quinolate e.g. an aluminium quinolate, lithium quinolate a cyano anthracene such as 9,10 dicyano anthracene, a polystyrene sulphonate and compounds of formulae shown in figs. 9 and 10.
  • the electron transmitting material can be mixed with the electroluminescent material and co-deposited with it.
  • the thickness of the layers is from 5nm to 500nm and preferably the thiclcness of the electroluminescent layer is from 20 to 50nm.
  • the second electrode functions as the cathode and can be any low work function metal e.g. aluminium, calcium, lithium, silver/magnesium alloys etc., aluminium is a preferred metal.
  • Lithium fluoride can be used as the second electrode for example by having a lithium fluoride layer formed on a metal.
  • the hole transporting layer serves to transport holes and to block the electrons, thus preventing electrons from moving into the electrode without recombining with holes.
  • the recombination of carriers therefore mainly takes place in the emitter layer.
  • the hole transporting layer serves to transport holes and to block the electrons, thus preventing electrons from moving into the electrode without recombining with holes.
  • the recombination of carriers therefore mainly takes place in the emitter layer.
  • Hole transporting layers are used in polymer electroluminescent devices and any of the known hole transporting materials in film form can be used.
  • hole transporting materials are aromatic amine complexes such as poly (vinylcarbazole), N, N'-diphenyl-N, N'-bis (3-methylphenyl) -1,1' -biphenyl - 4,4'-diamine (TPD), an unsubstituted or substituted polymer of an amino substituted aromatic compound, a polyaniline, substituted polyanilines, polythiophenes, substituted polythiophenes, polysilanes etc.
  • aromatic amine complexes such as poly (vinylcarbazole), N, N'-diphenyl-N, N'-bis (3-methylphenyl) -1,1' -biphenyl - 4,4'-diamine (TPD), an unsubstituted or substituted polymer of an amino substituted aromatic compound, a polyaniline, substituted polyanilines, polythiophenes, substituted polythiophenes, polysilanes etc.
  • polyanilines
  • R is in the ortho - or meta-position and is hydrogen, Cl-18 alkyl, Cl-6 alkoxy, amino, chloro, bromo, hydroxy or the group
  • R is alky or aryl and R' is hydrogen, Cl-6 alkyl or aryl with at least one other monomer of formula I above.
  • XIX where p is from 1 to 10 and n is from 1 to 20, R is as defined above and X is an anion, preferably selected from Cl, Br, SO 4 , BF 4 , PF 6 , H 2 PO 3 , H 2 PO 4 , arylsulphonate, arenedicarboxylate, polystyrenesulphonate, polyacrylate alkysulphonate, vinylsulphonate, vinylbenzene sulphonate, cellulose sulphonate, camphor sulphonates, cellulose sulphate or a perfluorinated polyanion.
  • arylsulphonates are p-toluenesulphonate, benzenesulphonate, 9,10- anthraquinone-sulphonate and anthracenesulphonate, an example of an arenedicarboxylate is phthalate and an example of arenecarboxylate is benzoate.
  • evaporable deprotonated polymers of unsubstituted or substituted polymer of an amino substituted aromatic compound are used.
  • the de-protonated unsubstituted or substituted polymer of an amino substituted aromatic compound can be formed by deprotonating the polymer by treatment with an alkali such as ammonium hydroxide or an alkali metal hydroxide such as sodium hydroxide or potassium hydroxide.
  • the degree of protonation can be controlled by forming a protonated polyaniline and de-protonating.
  • Methods of preparing polyanilines are described in the article by A. G. MacDiarmid and A. F. Epstein, Faraday Discussions, Chem Soc.88 P319 1989.
  • the conductivity of the polyaniline is dependant on the degree of protonation with the maximum conductivity being when the degree of protonation is between 40 and 60% e.g. about 50% for example.
  • a polyaniline can be formed of octamer units i.e. p is four e.g.
  • the polyanilines can have conductivities of the order of 1 x 10 "1 Siemen cm "1 or higher.
  • the aromatic rings can be unsubstituted or substituted e.g. by a Cl to 20 alkyl group such as ethyl.
  • the polyaniline can be a copolymer of aniline and preferred copolymers are the copolymers of aniline with o-anisidine, m-sulphanilic acid or o-aminophenol, or o- toluidine with o-aminophenol, o-ethylaniline, o-phenylene diamine or with amino anthracenes.
  • polymers of an amino substituted aromatic compound which can be used include substituted or unsubstituted polyaminonapthalenes, polyaminoanthracenes, polyaminophenanthrenes, etc. and polymers of any other condensed polyaromatic compound.
  • Polyaminoanthracenes and methods of making them are disclosed in US Patent 6,153,726.
  • the aromatic rings can be unsubstituted or substituted e.g. by a group R as defined above.
  • the polyanilines can be deposited on the first electrode by conventional methods e.g. by vacuum evaporation, spin coating, chemical deposition, direct electrodeposition etc. preferably the thickness of the polyaniline layer is such that the layer is conductive and transparent and can is preferably from 20nm to 200nm.
  • the polyanilines can be doped or undoped, when they are doped they can be dissolved in a solvent and deposited as a film, when they are undoped they are solids and can be deposited by vacuum evaporation i.e. by sublimation.
  • the polymers of an amino substituted aromatic compound such as polyanilines referred to above can also be used as buffer layers with or in conjunction with other hole transporting materials.
  • R 1; R 2 and R 3 can be the same or different and are selected from hydrogen, and substituted and unsubstituted hydrocarbyl groups such as substituted and unsubstituted aliphatic groups, substituted and unsubstituted aromatic, heterocyclic and polycyclic ring structures, fluorocarbons such as trifluoryl methyl groups, halogens such as fluorine or thiophenyl groups; R 1; R 2 and R 3 can also form substituted and unsubstituted fused aromatic, heterocyclic and polycyclic ring structures and can be copolymerisable with a monomer e.g. styrene.
  • R 1; R 2 and R 3 can be the same or different and are selected from hydrogen, and substituted and unsubstituted hydrocarbyl groups such as substituted and unsubstituted aliphatic groups, substituted and unsubstituted aromatic, heterocyclic and polycyclic ring structures, fluorocarbons such as trifluoryl
  • X is Se, S or O
  • Y can be hydrogen, substituted or unsubstituted hydrocarbyl groups, such as substituted and unsubstituted aromatic, heterocyclic and polycyclic ring structures, fluorine, fluorocarbons such as trifluoryl methyl groups, halogens such as fluorine or thiophenyl groups or nitrile.
  • Ri and/or R and/or R 3 examples include aliphatic, aromatic and heterocyclic alkoxy, aryloxy and carboxy groups, substituted and substituted phenyl, fluorophenyl, biphenyl, phenanthrene, anthracene, naphthyl and fluorene groups alkyl groups such as t-butyl, heterocyclic groups such as carbazole.
  • the electroluminescent material produces a saturated green light when an electric current is passed through it, the voltage applied is preferably up to 12 volts
  • the preferred thicknesses of the layers are :- hole transmitting material layer 40nm + 2
  • ITO coated glass piece (1 x 1cm ) had a portion etched out with concentrated hydrochloric acid to remove the ITO and was cleaned and dried.
  • the device was fabricated by sequentially forming on the ITO, by vacuum evaporation, a device as shown in fig. 17 in which (1) is ITO, (2) is CuPc (3) is NPB (4) is Tb(tmhd) 3 OPNP (5) is BCP (6) is Alq 3 (7) is LiF and (8) is Al layers comprising:-
  • NPB copper phthalocyanine
  • OPNP is as in (I)
  • BCP is bathocupron
  • Alq 3 is aluminium quinolate.
  • the coated electrodes were stored in a vacuum desiccator over a molecular sieve and phosphorous pentoxide until they were loaded into a vacuum coater (Edwards, 10 "6 ton-) and aluminium top contacts made.
  • the active area of the LED's was 0.08 cm by 0.1 cm 2 the devices were then kept in a vacuum desiccator until the electroluminescence studies were performed.
  • the ITO electrode was always connected to the positive terminal.
  • the current vs. voltage studies were carried out on a computer controlled Keithly 2400 source meter. An electric current of 12 volts was passed through the structure and the light emitted is shown on the chart of fig. 18 which is saturated green light, the colour of the light emitted by typical terbium chelates and by aluminium quinolate is shown for comparison

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

L'invention concerne un dispositif électroluminescent qui émet une lumière verte sensiblement saturée. Ce dispositif comprend une couche de tris(2,2,6,6-tétraméthyl-3,5-heptanedionato)terbium (III) OPNP et une couche de BCP.
PCT/GB2002/001884 2001-04-20 2002-04-22 Matiere electroluminescente emettant une lumiere verte WO2002087288A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0109759.1A GB0109759D0 (en) 2001-04-20 2001-04-20 Green light emitting electroluminescent material
GB0109759.1 2001-04-20

Publications (1)

Publication Number Publication Date
WO2002087288A1 true WO2002087288A1 (fr) 2002-10-31

Family

ID=9913168

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2002/001884 WO2002087288A1 (fr) 2001-04-20 2002-04-22 Matiere electroluminescente emettant une lumiere verte

Country Status (2)

Country Link
GB (1) GB0109759D0 (fr)
WO (1) WO2002087288A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003080758A2 (fr) * 2002-03-22 2003-10-02 Elam-T Limited Dispositif electroluminescent
WO2004058912A2 (fr) * 2002-12-24 2004-07-15 Elam-T Limited Materiaux et dispositifs electroluminescents
US7211334B2 (en) 2001-07-09 2007-05-01 Oled-T Limited Electroluminescent materials and devices
US7235311B2 (en) 2001-04-20 2007-06-26 Oled-T Limited Electroluminescent devices incorporating mixed metal organic complexes
US7303824B2 (en) 2001-08-04 2007-12-04 Oled-T Limited Electroluminescent device
US7354661B2 (en) 2001-06-15 2008-04-08 Oled-T Limited Electroluminescent devices

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998058037A1 (fr) * 1997-06-17 1998-12-23 South Bank University Enterprises Ltd. Materiau electroluminescent
EP0929104A2 (fr) * 1998-01-09 1999-07-14 Sony Corporation Dispositif électroluminescent et son procédé de fabrication
WO2000032718A1 (fr) * 1998-12-02 2000-06-08 South Bank University Enterprises Ltd Matieres electroluminescentes
WO2000032719A1 (fr) * 1998-12-02 2000-06-08 South Bank University Enterprises Ltd. Procede de formation de films ou de couches

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998058037A1 (fr) * 1997-06-17 1998-12-23 South Bank University Enterprises Ltd. Materiau electroluminescent
EP0929104A2 (fr) * 1998-01-09 1999-07-14 Sony Corporation Dispositif électroluminescent et son procédé de fabrication
WO2000032718A1 (fr) * 1998-12-02 2000-06-08 South Bank University Enterprises Ltd Matieres electroluminescentes
WO2000032719A1 (fr) * 1998-12-02 2000-06-08 South Bank University Enterprises Ltd. Procede de formation de films ou de couches

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
KIDO J ET AL: "White-light-emitting organic electroluminescent device using lanthanide complexes", JAPANESE JOURNAL OF APPLIED PHYSICS, PUBLICATION OFFICE JAPANESE JOURNAL OF APPLIED PHYSICS. TOKYO, JP, vol. 3B, no. 35, pages L394 - L396, XP002079654, ISSN: 0021-4922 *
Y. K. KIM ET AL.: "Chlorine effect on electroluminescence of Tb complexes", SYNTHETIC METALS, vol. 111-112, - 2000, pages 113 - 117, XP002212372 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7235311B2 (en) 2001-04-20 2007-06-26 Oled-T Limited Electroluminescent devices incorporating mixed metal organic complexes
US7354661B2 (en) 2001-06-15 2008-04-08 Oled-T Limited Electroluminescent devices
US7211334B2 (en) 2001-07-09 2007-05-01 Oled-T Limited Electroluminescent materials and devices
US7303824B2 (en) 2001-08-04 2007-12-04 Oled-T Limited Electroluminescent device
WO2003080758A2 (fr) * 2002-03-22 2003-10-02 Elam-T Limited Dispositif electroluminescent
WO2003080758A3 (fr) * 2002-03-22 2003-12-11 Elam T Ltd Dispositif electroluminescent
WO2004058912A2 (fr) * 2002-12-24 2004-07-15 Elam-T Limited Materiaux et dispositifs electroluminescents
WO2004058912A3 (fr) * 2002-12-24 2004-12-29 Elam T Ltd Materiaux et dispositifs electroluminescents
US7811676B2 (en) 2002-12-24 2010-10-12 Merck Patent Gmbh Electroluminescent materials and devices

Also Published As

Publication number Publication date
GB0109759D0 (en) 2001-06-13

Similar Documents

Publication Publication Date Title
EP1786825B1 (fr) Matériaux et dispositifs électroluminescents
WO2006090098A1 (fr) Matériaux et dispositifs électroluminescents
EP1620905B1 (fr) Complexes boriques electroluminescents
US20040023061A1 (en) Electroluminescent device
EP1585797B1 (fr) Materiaux et dispositifs electroluminescents
WO2006016193A1 (fr) Materiaux et dispositifs electroluminescents
US20040023062A1 (en) Electroluminescent device
EP1848786B1 (fr) Materiaux et dispositifs electroluminescents
EP1578886A2 (fr) Materiaux et dispositifs electroluminescents
US7718275B2 (en) Electroluminescent materials and devices
EP1336209A2 (fr) Dispositif electroluminescent
US20080124569A1 (en) Electroluminescent Complexes
EP1786885B1 (fr) Matériaux et dispositifs électroluminescents
WO2002102924A2 (fr) Dispositifs electroluminescents
US7235311B2 (en) Electroluminescent devices incorporating mixed metal organic complexes
WO2002087288A1 (fr) Matiere electroluminescente emettant une lumiere verte
WO2003093394A1 (fr) Dispositifs électroluminescents
EP1839464A1 (fr) Materiaux et dispositifs electroluminescents
WO2002086014A1 (fr) Matiere electroluminescente d'emission de lumiere blanche
WO2003080758A2 (fr) Dispositif electroluminescent
WO2002090466A1 (fr) Dispositifs electroluminescents
WO2002075820A1 (fr) Dispositifs electroluminescents

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SD SE SG SI SK SL TJ TM TN TR TT TZ UA UG US UZ VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP