Electroluminescent device with organic luminescent medium
AssigneeEastman Kodak Company
InventorsSteven A. VanSlyke, Ching W. Tang, Luther C. Roberts
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Abstract
An electroluminescent device is disclosed comprising in sequence, an anode, an organic hole injecting and transporting zone, an organic electron injecting and transporting zone, and a cathode. The organic hole injecting and transporting zone is comprised of a layer in contact with the anode containing a hole injecting porphyrinic compound and a layer containing a hole transporting aromatic tertiary amine interposed between the hole injecting layer and the electron injecting and transporting zone.
Claims20
An electroluminescent device comprising in sequence, an anode, an organic hole injecting and transporting zone, an organic electron injecting and transporting zone, and a cathode, characterized in that
- said organic hole injecting and transporting zone is comprised of
- a layer in contact with said anode containing a hole injecting porphyrinic compound and
- a layer containing a hole transporting aromatic tertiary amine interposed between said hole injecting layer and said electron injecting and transporting zone.
An electroluminescent device comprising in sequence
- an anode,
- a hole injecting layer comprised of a porphyrinic compound,
- a hole transporting layer comprised of an aromatic tertiary amine,
- an electron injecting and transporting layer comprised of a chelated oxinoid compound, and
- a cathode comprised of a layer consisting essentially of a plurality of metals other than alkali metals, at least one of said metals having work function greater than 4 eV.
An electroluminescent device comprising in sequence
- an opaque anode,
- a hole injecting layer comprised of a phthalocyanine,
- a first hole transporting layer comprised of a tetraphenyldiamine,
- a second hole transporting layer comprised of a triphenylamine,
- an electron injecting and transporting layer comprised of a chelated oxinoid compound, and
- a light transmissive cathode comprised of a layer consisting essentially of a plurality of metals other than alkali metals,
- at least one of said metals having work function greater than 4 eV and being chosen from the group consisting of magnesium, a rare earth metal, or indium, and
- at least one other of said metals being chosen from the group consisting of aluminum, copper, silver, gold, tin, lead, bismuth, tellurium, indium, and antimony.
Dependencies are inferred from the claim text.