Electric lamp and discharge devices – With luminescent solid or liquid material – Solid-state type
Patent
1999-02-01
2000-12-26
Font, Frank G.
Electric lamp and discharge devices
With luminescent solid or liquid material
Solid-state type
313503, H01J 162
Patent
active
06166488&
ABSTRACT:
An object of the invention is to achieve an organic EL device which is resistant to a deterioration of an inorganic-organic interface, has performance equivalent or superior to that of a prior art device comprising hole and electron injecting and transporting layers using an organic substance, possesses an extended life, weather resistance and high stability, and is inexpensive. This object is accomplished by the provision of an organic EL device which comprises a substrate, a hole injecting electrode and a cathode formed on the substrate, and an organic substance-containing light emitting layer located at least between these electrodes, wherein an inorganic insulating electron injecting and transporting layer is located between the light emitting layer and the cathode, and an inorganic insulating hole injecting and transporting layer is located between the light emitting layer and the hole injecting electrode. The inorganic insulating electron injecting and transporting layer comprises as a main component one or two or more oxides selected from the group consisting of strontium oxide, magnesium oxide, calcium oxide, lithium oxide, rubidium oxide, potassium oxide, sodium oxide and cesium oxide, and the inorganic insulating hole injecting and transporting layer comprises as a main component an oxide of silicon and/or an oxide of germanium. The main component has an average composition represented by
REFERENCES:
patent: 5952779 (1999-09-01), Arai et al.
patent: 5969474 (1999-10-01), Arai
patent: 5981092 (1999-11-01), Arai et al.
Patent Abstracts of Japan, vol. 1998, No. 02, Jan. 30 1998 (Jan. 30 1998)-& JP 09 260062 A (TDK CORP), Oct. 3 1997 (Oct. 3 1997) Abstract& us 5 981 092 A (Michio Arai et al) Nov. 9 1999 (Sep. 11 19999).
WO 97 42666 A (Pichler Karl; Cambridge Display Tech (GB)) Nov. 13 1997 (Nov. 13 1997) Claims.
Font Frank G.
Lee Andrew H.
TDK Corporation
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