Electroluminescent devices
First Claim
1. A method for forming an electroluminescent device, which method comprises:
- forming a first charge carrier injecting layer for injecting charge carriers of a first polarity;
forming a semiconducting region over the first charge carrier injecting layer, the semiconducting region comprising a first semiconducting organic layer comprising a first semiconducting organic component adjacent to a second semiconducting organic layer comprising a second semiconducting organic component; and
forming a second charge carrier injecting layer over the semiconducting region for injecting charge carriers of the opposite polarity;
wherein the step of forming the semiconducting region comprises depositing the second semiconducting organic component over the first semiconducting organic layer from a solvent in which the first semiconducting organic component is soluble.
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Abstract
An electroluminescent device comprising: a first charge carrier injecting layer for injecting positive charge carriers; a second charge carrier injecting layer for injecting negative charge carriers; and a light-emissive layer located between the charge carrier injecting layers and comprising a mixture of: a first component for accepting positive charge carriers from the first charge carrier injecting layer; a second component for accepting negative charge carriers from the second charge carrier injecting layer; and a third, organic light-emissive component for generating light as a result of combination of charge carriers from the first and second components; at least one of the first, second and third components forming a type II semiconductor interface with another of the first, second and third components.
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Citations
10 Claims
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1. A method for forming an electroluminescent device, which method comprises:
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forming a first charge carrier injecting layer for injecting charge carriers of a first polarity; forming a semiconducting region over the first charge carrier injecting layer, the semiconducting region comprising a first semiconducting organic layer comprising a first semiconducting organic component adjacent to a second semiconducting organic layer comprising a second semiconducting organic component; and forming a second charge carrier injecting layer over the semiconducting region for injecting charge carriers of the opposite polarity; wherein the step of forming the semiconducting region comprises depositing the second semiconducting organic component over the first semiconducting organic layer from a solvent in which the first semiconducting organic component is soluble. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for forming an electroluminescent device, which method comprises:
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forming an anode electrode layer; forming a layer comprising PEDOT;
PSS over the anode electrode layer;forming a semiconducting region over the anode electrode layer, the semiconducting region comprising a first semiconducting organic layer comprising a first semiconducting organic component adjacent to a second semiconducting organic layer comprising a second semiconducting organic component and; forming a cathode electrode layer over the semiconducting region; wherein the step of forming the semiconducting region comprises depositing the second semiconducting organic component over the first semiconducting organic layer from a solvent in which the first semiconducting organic component is soluble.
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Specification