Title:
PHOSPHORESCENT LIGHT-EMITTING COMPONENT COMPRISING ORGANIC LAYERS
Document Type and Number:
WIPO Patent Application WO2003100880
Kind Code:
A3
Abstract:
The invention relates to a light-emitting component comprising organic layers and emitting triplet excitonic states (phosphorescent light) with increased efficiency. Said component comprises a layer sequence having a hole-injecting contact (anode), at least one hole-injecting and transporting layer, a layer system in the light emission zone, at least one electron-transporting and injecting layer, and an electron-injecting contact (cathode). The inventive component is characterised in that the light-emitting zone consists of a row of heterojunctions with materials A and B (ABAB...) which form interfaces of type "staggered type II". One material (A) exhibits hole-transporting or bipolar transport characteristics and the other material (B) exhibits electron-transporting or bipolar transport characteristics. At least one of the two materials A or B is mixed with a triplet-emitter-dopant which is able to efficiently convert its triplet excitonic energy into light.
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Inventors:
QIN DASHAN (CA)
ZHOU XIANG (CN)
BLOCHWITZ-NIMOTH JAN (DE)
PFEIFFER MARTIN (DE)
ZHOU XIANG (CN)
BLOCHWITZ-NIMOTH JAN (DE)
PFEIFFER MARTIN (DE)
Application Number:
PCT/DE2003/001659
Publication Date:
September 02, 2004
Filing Date:
May 22, 2003
Export Citation:
Assignee:
NOVALED GMBH (DE)
QIN DASHAN (CA)
ZHOU XIANG (CN)
BLOCHWITZ-NIMOTH JAN (DE)
PFEIFFER MARTIN (DE)
QIN DASHAN (CA)
ZHOU XIANG (CN)
BLOCHWITZ-NIMOTH JAN (DE)
PFEIFFER MARTIN (DE)
International Classes:
H01L51/50; (IPC1-7): H01L51/20
Domestic Patent References:
| WO2001008230A1 | 2001-02-01 | |||
| WO2002041414A1 | 2002-05-23 |
Foreign References:
| US20030146443A1 | 2003-08-07 |
Other References:
WENPING HU ET AL: "Efficient red electroluminescence from devices having multilayers of a europium complex", APPL. PHYS. LETT. (USA), APPLIED PHYSICS LETTERS, AIP, USA, vol. 77, no. 26, 25 December 2000 (2000-12-25), pages 4271 - 4273, XP002286717, ISSN: 0003-6951
ADACHI C ET AL: "HIGH-EFFICIENCY ORGANIC ELECTROPHORESCENT DEVICES WITH TRIS(2-PHENYLPYRIDINE)IRIDIUM DOPED INTO ELECTRON-TRANSPORTING MATERIALS", APPLIED PHYSICS LETTERS, AMERICAN INSTITUTE OF PHYSICS. NEW YORK, US, vol. 77, no. 6, 7 August 2000 (2000-08-07), pages 904 - 906, XP000956860, ISSN: 0003-6951
IKAI M ET AL: "HIGHLY EFFICIENT PHOSPHORESCENCE FROM ORGANIC LIGHT-EMITTING DEVICES WITH AN EXCITON-BLOCK LAYER", APPLIED PHYSICS LETTERS, AMERICAN INSTITUTE OF PHYSICS. NEW YORK, US, vol. 79, no. 2, 9 July 2001 (2001-07-09), pages 156 - 158, XP001075381, ISSN: 0003-6951
ADACHI C ET AL: "HIGH-EFFICIENCY ORGANIC ELECTROPHORESCENT DEVICES WITH TRIS(2-PHENYLPYRIDINE)IRIDIUM DOPED INTO ELECTRON-TRANSPORTING MATERIALS", APPLIED PHYSICS LETTERS, AMERICAN INSTITUTE OF PHYSICS. NEW YORK, US, vol. 77, no. 6, 7 August 2000 (2000-08-07), pages 904 - 906, XP000956860, ISSN: 0003-6951
IKAI M ET AL: "HIGHLY EFFICIENT PHOSPHORESCENCE FROM ORGANIC LIGHT-EMITTING DEVICES WITH AN EXCITON-BLOCK LAYER", APPLIED PHYSICS LETTERS, AMERICAN INSTITUTE OF PHYSICS. NEW YORK, US, vol. 79, no. 2, 9 July 2001 (2001-07-09), pages 156 - 158, XP001075381, ISSN: 0003-6951
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