H - Electricity – 01 – L
Patent
H - Electricity
01
L
H01L 33/00 (2006.01) H01J 1/62 (2006.01) H01L 35/24 (2006.01) H01L 51/00 (2006.01) H01L 51/52 (2006.01)
Patent
CA 2293803
This invention pertains generally to the field of light-emitting diodes, LEDs. More particularly, this invention relates to polymer LEDs which offer high brightness, high efficiency, and extended operating life, and which comprise: a transparent hole-injecting anode layer (11); an emissive layer comprising an electroluminescent polymer (12); and an electron-injecting cathode layer (13); the cathode layer comprises an ultra-thin layer of alkaline earth metal, such as calcium, strontium, and barium, having a thickness of about 100 Angstroms or less, typically from about 15 to about 100 Angstroms.
La présente invention concerne le domaine des diodes électroluminescentes (DEL) et concerne plus particulièrement des DEL polymères qui offrent une forte brillance, une haute efficacité et une longue durée de fonctionnement. Lesdites DEL comportent (a) une couche anode transparente (11) d'injection de trous, (b) une couche d'émission comprenant un polymère électroluminescent (12) et (c) une couche cathode (13) d'injection d'électrons. La couche cathode comporte une couche ultra-mince de métal alcalino-terreux, tel que du calcium, du strontium et du baryum, ayant une épaisseur d'environ 100 angströms ou moins, et typiquement d'environ 15 à environ 100 angströms.
Swabey Ogilvy Renault
Uniax Corporation
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