INTERMEDIATE LAYERS TREATED BY CF4-PLASMA FOR STACKED ORGANIC LIGHT-EMITTING DEVICES
First Claim
1. A stacked organic light emitting device comprising:
- (a) an anode;
(b) a cathode;
(c) a plurality of emissive units disposed between the anode and the cathode, wherein the emissive units comprise at least a hole-transport layer and an electron-transport layer; and
(d) an intermediate layer disposed between two adjacent said emissive units, wherein the intermediate layer consists of at least two sub-layers, a first sub-layer being formed of a material that can inject electrons into one emissive unit and a second sub-layer being formed of a material that can inject holes into the adjacent emissive unit, wherein a surface of said intermediate layer has been treated by a low pressure CF4-plasma.
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Accused Products
Abstract
There is disclosed a structure for a stacked organic light emitting device in which a plurality of emissive units are disposed between the anode and the cathode. The emissive units comprise at least a hole-transport layer and an electron-transport layer. An intermediate layer is disposed between two adjacent emissive units and the intermediate layer comprises at least two sub-layers, a first sub-layer being formed of a material that can inject electrons into one emissive unit and a second sub-layer being formed of a material that can inject holes into the adjacent emissive unit. The sub-layers are formed of metals or inorganic materials only and a surface of the intermediate layer may be treated by a low pressure CF4-plasma.
31 Citations
15 Claims
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1. A stacked organic light emitting device comprising:
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(a) an anode;
(b) a cathode;
(c) a plurality of emissive units disposed between the anode and the cathode, wherein the emissive units comprise at least a hole-transport layer and an electron-transport layer; and
(d) an intermediate layer disposed between two adjacent said emissive units, wherein the intermediate layer consists of at least two sub-layers, a first sub-layer being formed of a material that can inject electrons into one emissive unit and a second sub-layer being formed of a material that can inject holes into the adjacent emissive unit, wherein a surface of said intermediate layer has been treated by a low pressure CF4-plasma. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A stacked organic light emitting device comprising:
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an anode;
a cathode;
a plurality of emissive units disposed between the anode and the cathode, wherein the emissive units comprise at least a hole-transport layer and an electron-transport layer; and
an intermediate layer disposed between two adjacent said emissive units, wherein the intermediate layer consists of at least two sub-layers, a first sub-layer being formed of a material that can inject electrons into one emissive unit and a second sub-layer being formed of a material that can inject holes into the adjacent emissive unit, wherein said intermediate layers are formed of metals and/or inorganic materials only.
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15. A stacked organic light emitting device comprising:
an anode;
a cathode;
a plurality of emissive units disposed between the anode and the cathode, wherein the emissive units comprise at least a hole-transport layer and an electron-transport layer; and
an intermediate layer disposed between two adjacent said emissive units, wherein the intermediate layer consists of at least two sub-layers, a first sub-layer being formed of a material that can inject electrons into one emissive unit and a second sub-layer being formed of a material that can inject holes into the adjacent emissive unit.
Specification