Electroluminescent devices fabricated with encapsulated light emitting polymer particles

• US 20030032361A1
• Filed: 04/30/2002
• Published: 02/13/2003
• Est. Priority Date: 04/30/2001
• Status: Active Grant

• Current Assignee: Lumimove, Inc.
• Original Assignee: Lumimove, Inc.
• Inventors: Kinlen, Patrick J., St. John, Brent, Murasko, Matthew
• Granted Patent: US 7,001,639 B2
• Time in Patent Office: Days
• US Class Current: 445/24
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 50/14 Carrier transporting layers
• CPC Class Codes: H10K 50/84 Passivation; Containers; Encapsulations
• CPC Class Codes: H10K 59/87 Passivation; Containers; Encapsulations
• CPC Class Codes: H10K 85/10 Organic polymers or oligomers
• CPC Class Codes: H10K 85/111 comprising aromatic, heteroaromatic, or aryl chains, e.g. polyaniline, polyphenylene or polyphenylene vinylene
• CPC Class Codes: H10K 85/113 Heteroaromatic compounds comprising sulfur or selene, e.g. polythiophene
• CPC Class Codes: H10K 85/1135 Polyethylene dioxythiophene [PEDOT]; Derivatives thereof
• CPC Class Codes: H10K 85/114 Poly-phenylenevinylene; Derivatives thereof
• CPC Class Codes: H10K 85/115 Polyfluorene; Derivatives thereof
• CPC Class Codes: H10K 85/151 Copolymers
• CPC Class Codes: H10K 85/30 Coordination compounds
• CPC Class Codes: H10K 85/324 comprising aluminium, e.g. Alq3
• CPC Class Codes: H10K 85/342 comprising iridium
• CPC Class Codes: H10K 85/351 Metal complexes comprising lanthanides or actinides, e.g. comprising europium
• CPC Class Codes: H10K 85/60 Organic compounds having low molecular weight H10K85/10 - H10K85/50 take precedence
• CPC Class Codes: H10K 85/649 Aromatic compounds comprising a hetero atom

Abstract

The present system provides electroluminescent devices including electroluminescent panels, and more specifically, electroluminescent devices fabricated from materials including light emitting polymers and particles comprising light emitting polymers that have been encapsulated with conductive polymers and/or insulative polymers.

Claims

1. A method for fabricating an electroluminescent display device comprising:

encapsulating LEP particles with a conductive polymer;

formulating an LEP ink by mixing the encapsulated LEP particles with binder polymers;

depositing a conducting rear electrode onto a substrate in a pattern;

depositing the LEP ink onto REL patterns to form an LEP layer;

depositing a transparent hole transporting electrode onto the LEP layer;

depositing a front outlining electrode onto the hole transporting electrode; and

depositing connection leads to the rear electrode and the front outlining electrode.

2. The method of claim 1 wherein said display device is an electroluminescent panel.

3. The method of claim 1 wherein said LEP particles are selected from the group consisting of polypyridine;

poly(p-phenylene vinylene);

poly[2-methoxy-5-(2′

-ethylhexyloxy)-1,4-phenylenevinylene];

poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylene-vinylene];

poly[(2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylene-vinylene)-alt-co-(4,4′

-biphenylene-vinylene)];

poly[(9,9-dioctyl-2,7-divinylenefluorenylene)-alt-co-(9,10-anthracene)];

poly[(9,9-dioctyl-2,7-divinylenefluorenylene)-alt-co-(4,4′

-biphenylene)];

poly[{9,9-dioctyl-2,7-divinylene-fluorenylene}-alt-co-{2-methoxy-5-(2-ethyl-hexyloxy)-1,4phenylene-}];

poly[{9,9-dioctyl-2,7-bis(2-cyanovinylene-fluorenylene}-alt-co-{2-methoxy-5-(2-ethyl hexyloxy)-1,4-phenylene}];

poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-(1-cyanovinylenephenylene)];

poly[{9,9-dihexyl-2,7-bis(1-cyanovinylene)fluorenylene}-alt-co-{2,5-bis(N,N′

-diphenylamino)-1,4-phenylene}];

poly[{9-ethyl-3,6-bis(2-cyanovinylene)carbazolylene)}-alt-co{2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylene}];

poly[(9,9-di(2-ethylhexyl)-fluorenyl-2,7-diyl)-co-(N,N′

-diphenyl)-N,N′

-di-(p-butyl phenyl)-1,4-diaminobenzene];

poly[2-(6-cyano-6-methylheptyloxy)-1,4-phenylene);

poly[{9,9-dioctylfluorenyl-2,7-diyl}-co-{1,4-(2,5-dimethoxy)benzene}];

poly[{9,9-dioctylfluorenyl-2,7-diyl}-co-{1,4-(2,5-dimethoxy)benzene}];

poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-(1,4-ethylenylbenzene)];

poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-(1,4-diphenylene-vinylene-2-methoxy-5-{2-ethylhexyloxy}-benzene)];

poly[(9,9-dihexylfluorenyl-2,7-divinylenefluorenylene)];

poly[(9,9-dihexyl-2,7-(2-cyanodivinylene)-fluorenylene)];

poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-(1,4-vinylenephenylene)];

poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-(1,4-vinylenephenylene)];

poly(9,9-dioctylfluorenyl-2,7-diyl;

poly(9,9-dihexylfluorenyl-2,7-diyl);

poly[9,9-di-(2-ethylhexyl)-fluorenyl-2,7-diyl];

poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-(N,N′

-diphenyl)-N,N′

-di(butyloxyphenyl) -1,4-diaminobenzene)];

poly[(9,9-dioctylfluorenyl-2,7-diyl)alt-co-(N,N′

-diphenyl)-N,N′

-di(p-butyloxyphenyl)-1,4-diaminobenzene)]poly[(9,9-dihexylfluorenyl-2,7-diyl)-co-(1,4-benzo-{2,1′

,3}-thiadiazole)];

poly[(9,9-dihexylfluorenyl-2,7-diyl)-alt-co-(9,10-anthracene)];

poly[(9,9-dioctylfluorenyl-2,7-diyl)-alt-co-(N,N′

-bis{4-butylphenyl}-benzidine- N,N′

-{1,4-diphenylene})];

poly[(9,9-dihexylfluorenyl-2,7-diyl)-alt-co-(2-methoxy-5-{2-ethylhexyloxy}-1,4-phenylene)];

poly[(9,9-dihexylfluorenyl-2,7-diyl)-co-(9,ethyl-3,6-carbazole)];

poly[(9,9-dihexylfluorenyl-2,7-diyl)-alt-co-(9,ethyl-3,6-carbazole)];

poly[(9,9-dihexylfluorenyl-2,7-diyl)-alt-co-(9,9′

-spirobifluorene-2,7-diyl];

poly[(9,9-dihexylfluorenyl-2,7-diyl)-co-(2,5-p-xylene)];

poly[(9,9-dihexylfluorenyl-2,7-diyl)-co-(3,5-pyridine)];

poly[(9,9-dihexylfluorenyl-2,7-diyl)-co-(1,4-phenylene)];

poly[(9,9-dihexylfluorenyl-2,7-diyl)-alt-co-(9,9-di-{5-pentanyl}-fluorenyl-2′

,7′

-diyl;

poly[(9,9-dihexylfluorenyl-2,7-diyl)-co-(6,6′

{2,2′

-bipyridine})];

poly[(9,9-dihexylfluorenyl-2,7-diyl)-co-(6,6′

-{2,2′

;

6′

,2″

-terpyridinel})]; and

poly[(9,9-dihexylfluorenyl-2,7-diyl)-co-(N,N′

bis {p-butylphenyl}-1,4-diamino phenylene)], and combinations thereof.

4. The method of claim 1 wherein said LEP particles are organic light emitting devices which are selected from the group consisting of tris(8-hydroxyquinolato) aluminum;

tetra(2-methyl-8-hydroxyquinolato) boron;

lithium salt;

4,4′

-bis(9-ethyl-3-carbazovinylene)-1,1′

-biphenyl;

9,10-di[(9-ethyl-3carbazoyl)-vinylenyl)]-anthracene;

4,4′

-bis(diphenylvinylenyl)-biphenyl;

1,4-bis(9-ethyl-3-carbazovinylene)-2-methoxy-5-(2-ethylhexyloxy)benzene;

tris(benzoylacetone)mono(phenanthroline) europium (III);

tris(dibenzoylmethane)mono(phenanthroline) europium (III);

tris(dibenzoylmethane)mono(5-aminophenanthroline)europium (III);

tris(dinapthoylmethane)mono(phenanthroline) europium (III);

tris(biphenoylmethane)mono(phenanthroline) europium (III);

tris(dibenzoylmethane)mono(4,7-diphenyl phenanthroline)europium (III);

tris(dibenzoylmethane)mono(4,7-dimethyl-phenanthroline)europium (III);

tris(dibenzoylmethane)mono(4,7-dihydroxy-phenanthroline)europium (III);

tris(dibenzoylmethane)mono(4,7-dihydroxyloxy-phenanthroline)europium (III);

lithium tetra(2-methyl-8-hydroxyquinolinato) boron;

lithium tetra(8-hydroxyquinolinato) boron;

4,4′

-bis(9-ethyl-3-carbazovinylene)-1,1′

-biphenyl;

bis(8-hydroxyquinolinato)zinc;

bis(2-methyl-8-hydroxyquinolinato)zinc;

Iridium (III) tris(2-phenylpyridine);

tris(8-hydroxyquinoline)aluminum; and

tris[1-phenyl-3-methyl-4-(2,2-dimethylpropan-1-oyl)-pyrazolin-5-one]-terbium, and combinations thereof.

5. The method of claim 1 wherein said binder polymers are selected from the group consisting of poly(methylmethacrylate), poly(butylmethacrylate), poly(vinylbutyral), poly(vinylalcohol), poly (vinylchloride), polycarbonate, polystyrene, poly(vinylidene chloride), poly(vinylidene fluoride), poly(acrylonitrile), poly(oxyethylene), cellulose esters, cellulose ethers, nylon 6,6, nylon 12, nylon 6,12, poly(ethylene oxide),poly(ethylene-co-vinylacetate), poly(vinylcarbazole), poly(caprolactone), polysulfone, poly(vinylpyrrolidone), poly(4-vinylphenol), poly(methyloctadecylsiloxane), and combinations thereof.

6. The method of claim 1 wherein said conducting rear electrode comprises an inorganic compound.

7. The method of claim 6 wherein said inorganic compound comprises indium tin oxide.

8. The method of claim 1 wherein said conducting rear electrode comprises an organic compound.

9. The method of claim 8 wherein said organic compound is a conductive polymer selected from the group consisting of polyaniline, polypyrrole, poly(3,4-ethylenedioxythiophene), and combinations thereof.

10. The method of claim 1 wherein said conducting rear electrode is a mixture of inorganic and organic compounds.

11. The method of claim 10 wherein said compounds are selected from the group consisting of indium tin oxide, polyaniline, polypyrrole, poly(3,4-ethylenedioxythiophene), and combinations thereof.

12. The method of claim 1 wherein said hole transporting electrode is selected from the group consisting of PDOT, PANI, ITO, and Ppy, and combinations thereof.

13. The method of claim 1 wherein said front outlining electrode is selected from the group consisting of silver and carbon.

14. The method of claim 1 wherein said electroluminescent display device comprises an organic/inorganic hybrid.

15. The method of claim 1, wherein any of the depositing steps are performed by a printing process.